#help-with-arduino

1 messages · Page 2 of 1

grim bane
#

I'll start going down in resistance

#

DOA?

quick maple
#

yeah I assume you want to know if it works to make sure it's not Dead on Arrival as well?

#

and when you say doesn't work what exactly do you mean? Do you expect a led to tell you it works ?

grim bane
#

I expect the i2c scanner sketch to pick it up

quick maple
#

or did you do a sketch to scan for i2c adress?

grim bane
#

I am getting voltage through the SDA and SCL pins, I have two of the same sensor and both are not working.

tardy iron
#

did you pull up the CSB pin as suggested earlier? 1k resistor to VCC might be safe/good enough?

grim bane
#

@tardy iron I did with the 10k-47k tries. Just tied 1k and 510 resistors with no luck either

#

I just directly connect the CSB pin to the power line right?

#

bois and girls I think we did it

#

I think I had to "reset" the chip by disconnecting the power to it and not just hitting the reset button on the arduino

#

it is switch addresses its finding each time tho... ?

unknown.png
tardy iron
#

oh yeah, it might latch its bus mode on power-up there are address selection pins (CAD0 and CAD1, though your board has CADY?) that you might have to wire to GND or VCC to keep a stable address, or maybe it's a weird part that has multiple addresses?

#

basically if there aren't pullups or pulldowns internally on those address lines, it might read noise from them and keep changing its apparent address

grim bane
#

I put all other pins onto ground and it seems to be sitting on 0x0C stable

#

thank y'all ❤️

snow quest
#

i'm trying to attach and detach an interrupt within my main program, and getting unexpected results. is this not possible?

#

i.e. in the loop() function rather than setup()

#

there should be no difference right?

sturdy plover
#

That file does not exist

gilded swift
native dagger
#

Never got an answer to this, but I'll ask in another way. Does anyone else experience this? The arduino IDE constantly forgets boards that I have loaded into it on restart. Not just reverting to the UNO, that's fine I can always switch back. Instead it actually forgets that I have installed for example adafruit SAMD boards, and I have to re-do it every time. Anyone else?

pine bramble
#

Nope. That's bizarre.

#

The packages directory and staging directory hold all the files.

#

staging holds the .zip files.

#

Need to do a careful study of where these files are kept. I'd never noticed it keeps a copy of every .zip .. in an entirely separate subtree from the active unzipped libraries.

quick maple
native dagger
#

I must have gotten distracted

pine bramble
quick maple
#

he is on windows

vale leaf
#

Where is the documentation about BMP3xx sampling settings

leaden walrus
vale leaf
#

Anywhere where it explains what the differences between these are?

leaden walrus
#

difference between what? like data rate vs. oversampling? or what each one's options are?

vale leaf
#

what each option of oversampling does

leaden walrus
#

checkout the datasheet for those details

analog lagoon
#

I'm learning I2C for the first time for a project using PCA9685 16-channel servo drivers (except I'm using them for driving RGB LEDs.) I've gotten the drivers to successfully activate the LEDs, but when I try to turn them off the LEDs are just very very dim. I'm using this function: pwm1.setPWM (0, 4095, 0); On the adafruit site FAQ for this product it says to use 4096 rather than 4095 to turn it off completely; when I tried that it turned them on to full brightness. Any idea what might help with this?

analog lagoon
#

I'm not sure if it's an error on the adafruit site, or something I'm doing wrong, but when I change the function to pwm1.setPWM (0, 0, 4096); that actually turns it all the way off. On the adafruit site it says to use pwm1.setPWM (0, 4096, 0); Being lost in noobtown is rough sometimes, but through accidental trial and error I have figured out a working solution.

leaden walrus
analog lagoon
leaden walrus
#

ah. thanks. yah. looks like a typo.

#

fixed

sturdy plover
#

How can I get my adafruit bluefruit sense to send battery, temperature, humidity, barometric pressure and illuminance via the bthome (https://bthome.io/) standard? Whould it be comparable to this (https://learn.adafruit.com/adafruit-feather-sense/advertising-beacon) example?

BTHome
BTHome: Open standard for broadcasting sensor data over Bluetooth LE.

Free and open standard for broadcasting sensor data over Bluetooth LE.

Adafruit Learning System
Adafruit Feather nRF52840 Sense

A BLE Feather to sense your environment!

deft depot
#

not much going on the website. research the open home I guess. Or home assistant. Or something from Adafruit's tutorial lol. how did you hear of bthome?

north stream
sturdy plover
native dagger
#

Would anyone be willing to pull request the pins required for the RP2040 board for this library in the #if defined section? I am working on making sure I have the right pins

#

Nevermind! The pins are already correct

#

I came across someone using the DS3231 RTC and the VS1053 together and having severe issues, but unfortunately the post never came to a conclusion and is 5 years old. They weren't using adafruit libs however. Can anyone think of a reason why adafruit I2C RTC library might interfere with an adafruit SPI MP3 player library?

cedar mountain
native dagger
#

yeah that's fair

#

I think I'm going to just use the internal RTC

#

bypass the issue. The internal is good enough for my purposes

sage lichen
#

Hi, would somebody be able to help me with reading from an i2c sensor?

#

It doesn't have a library so I am trying to implement it myself using the wire library

quick maple
#

which sensor ?

sage lichen
#

I3G4250D

#

Whenever I read from the OUT_X_L and OUT_X_H registers, I am just getting 11111111

quick maple
#

are you interfacing directly with it or you use an intermediadry like a breakout, or i2c expander or i2c backpack ?

sage lichen
#

Interfacing directly with it

quick maple
#

and did you use the 10k pullups on sda/scl ?

sage lichen
#

Yeah

#

And another I2C device on the same bus is working correctly

quick maple
tardy iron
#

are you checking for errors from the Wire methods? consistently reading all-ones sounds suspiciously like a non-responsive device on I2C, so you might be getting undetected NAKs if you're not checking for errors

sage lichen
sage lichen
quick maple
#

sure but the way it read the values etc could be used as an inspiration

tardy iron
quick maple
#

the rest is just a couple more capacitors/sensors

sage lichen
# 
byte x0, x1;

void loop() {
  Wire.beginTransmission(0x68);
  byte error = Wire.endTransmission();
  if(error != 0) {
    Serial.println("Gyroscope Disconnected :(");
    Serial.println("===================================");
  }

  Wire.requestFrom(0x28, 2);
  if(Wire.available() <= 2) {
    x0 = Wire.read();
    x1 = Wire.read();
  }

  Serial.print("X0: ");
  Serial.println(x0);
  Serial.print("X1: ");
  Serial.println(x1);

  idleLed();

  delay(10);
}
tardy iron
sage lichen
#

The register is at 0x28 on the device

#

And I was requesting 2 bytes from it because I thought that the register address was the start address and I needed to read the value from that register and the next register

tardy iron
# sage lichen The register is at 0x28 on the device

yeah, then you need to use the same address 0x68 for the requestFrom, but you typically need to first send the byte 0x28 to address 0x68 to tell it that's where you want to read from. (and there's additional complication if it requires a "repeated START", but not all devices require it)

sage lichen
#

Oh

#

Wait the repeated start thing seems familiar

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I think it was in the datasheet

#

One sec

#

And then this was the table

unknown.png
tardy iron
#

oh, it's got a weird thing going where you set the high bit of the register number to request auto-increment mode

sage lichen
#

What does that mean 😅

tardy iron
#

roughly, it means you bitwise-or 0x80 with the desired register address if you want to turn on auto-increment to read or write multiple consecutive registers in a single transaction

#

you don't need to worry about "SAD+R/W" stuff; that's taken care of by Wire

sage lichen
#

Ohhhh ok cool that makes sense

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So that was what I was thinking it would already let me do by default

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So how do I turn on auto-increment specifically? @tardy iron

tardy iron
#

yeah, so i think 0xA8 instead of 0x28 as the register address to turn on auto-increment

sage lichen
#

Ah ok

tardy iron
#

and to get a repeated START condition, specify the optional argument stop like false like Wire.endTransmission(false) when you're sending the register address

sage lichen
#

Ah ok I see

# 

byte x0, x1;

void loop() {
  byte error;
  Wire.beginTransmission(0x68);
  error = Wire.endTransmission();
  if(error != 0) {
    Serial.println("Gyroscope Disconnected :(");
    Serial.println("===================================");
  }
  Wire.beginTransmission(0x68);
  Wire.write(0x28);
  Wire.requestFrom(0xA8, 2);
  Wire.endTransmission(false);
  
  // step 5: receive reading from sensor
  if(Wire.available() <= 2) {
    x0 = Wire.read();
    x1 = Wire.read();
  }

  
  Serial.print("X0: ");
  Serial.println(x0);
  Serial.print("X1: ");
  Serial.println(x1);

  idleLed();

  delay(10);
}
#

So this would be the new program?

tardy iron
# sage lichen So this would be the new program?

not quite… more like

  Wire.beginTransmission(0x68);
  Wire.write(0xA8);
  error = Wire.endTransmission(false);
  // add error checking here
  error = Wire.requestFrom(0x68, 2);
  // add error checking here

i think. i haven't tested or compiled it

sage lichen
#

Ah I see

#

The data doesn't change for some reason

tardy iron
#

you might need to do some setup of sampling frequency first

sage lichen
#

Wait is this important?

unknown.png
tardy iron
sage lichen
#

Ohhhh I misunderstood the first time and thought you meant with the device address

#

Ok that makes more sense

quick maple
#

I guess someday I can write a library too, this datasheet seems complicated 😦

sage lichen
#

Once I get it figured out I might

#

@tardy iron This seems to be the issue: error = Wire.requestFrom(0x68, 2);

#

(I added some error handling)

tardy iron
sage lichen
#

One sec

tardy iron
sage lichen
#

Ah yeah

quick maple
#

I feel like I made a mistake getting a pricey 4-in-1 sensor 😦

sage lichen
#

And the value is "2" which is correct

#

So I guess its not giving an error after all

tardy iron
#

yeah, sorry, i was misremembering how that method behaved. i think in practice most people ignore the return value and use available() instead

sage lichen
#

All good

#

Strangely, it gives different values after each restart

#

But the values stay the same

#

So there must be something I have to do to tell it that I've read the values or something

tardy iron
#

yeah, you probably need to read the datasheet in more detail about how to configure it. some sensors need to be commanded to take a new sample, and others have a mode where they keep taking samples at a regular rate, etc.

sage lichen
#

Ok

#

Oh I see

#

I need to enable fifo

quick maple
#

there is a stream mode apparently too, I have to ask but I suppose you used the resistors/capacitors they said to use for the the filter ?

sage lichen
#

Yeah I did

#

Thx for checking though

#

Looks like this is how to do stream mode

tardy iron
#

you might want to look at Arduino libraries for related devices from ST; their command structures tend to be similar

sage lichen
#

ok

#

@quick maple Yeah I'm going to give that library another look lol

quick maple
#

yeah even if it's not 100% correct it might give you an idea of the right sequence to arm it/read from it

sage lichen
#

Yeah

quick maple
#

that breakout doesn't seem very complicated or I'm blind

#

probably just provide the filter they asks about

sage lichen
#

Yeah honestly thats probably it

#

Giving it a shot now

#

Oh it actually works 💀

#

Woah this thing is precise

#

So much better than the mpu3060 or whatever

quick maple
#

I don't even have a robot yet so shrug

#

but I'll note it for when I do

sage lichen
#

Its expensive if you're going to make more than 1 unit

#

They cost like $10 each

#

So more than pretty much everything else combined on my pcb 🤣

#

But now I see why. This thing is awesome

quick maple
#

Well the base of the robot was 150$

#

and cameras are likely to be 175$ each + 300$ for FLIR, so yeah cost around 10$ not going to faze me

sage lichen
#

Oh wow yeah you'll be good then 🤣

#

Meanwhile I'm over here hoping to sell these for $50/each eventually

#

That $10 part is pretty expensive then 🤣

quick maple
#

probably even going to have two to do sensor fusion/sampling (these might do that already internally)

sage lichen
#

Oh yeah thats the plan

#

I forgot to put a magnetometer on this version of the board but this gyro is accurate enough that I'm not too nervous

quick maple
#

that robot is a life project though, hopefully I finish it. By the time I'm done hopefully thermal cameras available for DIY will be much less

sage lichen
#

But yeah going to have to fuse it with the accelerometer

sage lichen
quick maple
#

and we're going to have a battery technology that provide as much density as gasoline like they keep promising us...

sage lichen
#

hahaha

#

Power it with those tesla cells

quick maple
#

nah they say nanowire might approach gasoline and that air-metal battery might be 5x better

sage lichen
#

Oh wow

quick maple
#

can't wait to see it. Meanwhile walmart sells r/c toys with 1810 zinc-carbon batteries 😦

sage lichen
#

🤣

quick maple
#

I'm sure if it was less expensive they'd use the 2nd oldest type of battery, lemon juice in a jar off metal

sage lichen
#

Oh yeah

quick maple
#

make me facepalm every time I see "heavy duty" on them... kinda like seeing Turbo GTR on a 40hp car.... but I disgress

sage lichen
#

I mean you could put a turbo on a 40hp engine

quick maple
#

Yeah it's that and putting Gran Turismo which is a competition to last 24h in a race and go really fast on a car with a lawmmower enginew

#

even if you put turbo on it and NOS you'll get at most 80hp

sage lichen
#

🤣

quick maple
#

meanwhile a "shareware"/cut-down version of a V8 will probably give you 280hp..

sage lichen
#

I wish my car got that much 🤣

#

Would be a rocket

quick maple
#

What is your take on this: I feel like a I made a mistake getting a Pimironi PIM357- BME680 Breakout - Air Quality, Temperature, Pressure, Humidity Sensor. Like I was checking for a sensirion temp/humidity sensor and saw those Bosch 4-in-1
but since sensirion are 20$ and BME is 29$ I guess the accuracy is going to be really bad

sage lichen
#

Hmm

#

I actually haven't messed around enough with those sensors to know

cedar mountain
sand steppe
#

Hi All,
I am using Adafruit Grand Central M4, I have added OTA support for the same over Ethernet. If there is a power failure during this re-write, the operation is interrupted and does not complete. The application region does not have the complete code re-written and the system breaks. When I power ON the board again, it is unable to execute the new firmware and cannot rollback on to the old firmware either. Can anyone help me to built a bootloader which has a rollback feature, when the system breaks.

cedar mountain
sage lichen
#

Let me know if this is the wrong channel, but in general, should I run a calibration script for my gyro each time on boot, or just do 1, more comprehensive, calibration and hard-code the offsets for future use?

native dagger
#

Adafruit libs are cpp/h files, so it should be possible for me to modify one and then make it into a library for arduino right?

#

Specifically I'm looking to add to the VS1053 library and add reading decode time into the mix

#

It sure seems like it's really simple, just reading from the decode time register

eternal cloud
native dagger
#

Yeah that's the one, I just wasn't sure how to get it on the arduino

#

That said it turns out the functionality on the chip is really minimal and not sufficient for my needs

eternal cloud
native dagger
#

Ah I wasn't sure if they were editable. I haven't done arduino in a while

sand steppe
north stream
# sand steppe Thank you for your reply. Is there are any examples or getting started document...

A very simple checksum algorithm is to add up all the bytes and just keep track of the least significant byte of the result. Then store the result somewhere. To check it, add up all the bytes and see if the last (or only) byte of the result matches. Many implementations complement the result or start with some value other than zero, but the basic notion is the same. You could also use XOR instead of add. For more reliability, you could use a CRC8 calculation instead of just adding or xoring the bytes.

sage lichen
#

Hey guys, for some reason my ESP12f is crashing when I run WiFi.begin()

#

Any ideas as to what could cause this?

sage lichen
#

Nvm, looks like it was due to not enough power

ember geyser
#

Hello! looking for help changing the brightness on my POV led staff. shurik179 build. Istybitsy m4. unfamiliar with code, Is there any way to easily turn down the brightness to conserve battery life? we put 9000mah batteries in this thing but it still eats it up fast and honestly its too bright you cant even look at the thing

quick maple
#

my apologies, maybe I'm missing something, but don't they have to be very bright for the effect to work ?

ember geyser
#

no, I don't believe so

inland gorge
analog lagoon
#

Looking for help: I'm using a few PCA9865s to drive a bunch of RGB LEDs. When I disconnect the external power supply, and just have the arduino plugged in (to my computer for example, while updating code), the LEDs still activate. My worry is this will fry my arduino (I'm using 20 RGB LEDs, so essentially 60 LEDs.) Am I wrong here? Should this be happening?

leaden walrus
#

how are the LEDs being powered?

eternal cloud
analog lagoon
#

Thanks so much… I read somewhere it might not be safe to have both an external supply and usb plugged into the arduino at once. Is that true? The external supply powers the arduino as well when it’s not plugged in via USB. Eventually it will be a standalone thing so I want the arduino and LEDs to be on the same external supply. It’s a 2amp 5v barrel jack.

quick maple
#

It's hard to imagine that much leds with a servo board not using like 6A

#

and the board specifically say to not power the servos from the arduino

#

(or anything that take a couple of amps like so much leds etc)

eternal cloud
#

Since your external power supply is 5V , just like the USB , it's okay

analog lagoon
#

Total beginner here: I was thinking each pin has a 220ohm resistor on it, and green/blue are max 3.2v. So each pulls less than 20mA. So 20mA x 60leds = 1.2amps. Is this wrong? Closer to 6A?

eternal cloud
#

Current draw for LEDs is not constant, depends on the brightness, and the length of time they are on.
2A should probably be enough, but if you want to light them all at the same time on full brightness, or if you notice that some of them are dimmer , you can always get a higher current power supply.

PWM and lower brightness are your friends though 😆

analog lagoon
#

Yeah I was planning on mapping max brightness to much lower, since 60leds are extremely bright.

ember geyser
sage lichen
#

I have a question about some code that I found

# 
#include <Wire.h>
#include <math.h>

#include <FRAM_MB85RC_I2C.h>


//define a struct of various data types
typedef struct MYDATA_t {
    bool data_0;
    float data_1; 
    long data_2; 
    int data_3;
    byte data_4;
};

//define a struct joining MYDATA_t to an array of bytes to be stored
typedef union MYDATA4I2C_t {
 MYDATA_t datastruct;
 uint8_t I2CPacket[sizeof(MYDATA_t)];
};

MYDATA4I2C_t mydata; //data to be written in memory
MYDATA4I2C_t readdata; //data read from memory

//random address to write from
uint16_t writeaddress = 0x025;

//Creating object for FRAM chip
FRAM_MB85RC_I2C mymemory;

void setup() {

    Serial.begin(9600);
    while (!Serial) ; //wait until Serial ready
    Wire.begin();
    
    byte arraySize = sizeof(MYDATA_t);
    
    Serial.println("Starting...");
        
    mymemory.begin();
        
    
//---------init data - load array
    mydata.datastruct.data_0 = true;
    if (mydata.datastruct.data_0) Serial.println("true");
    if (!mydata.datastruct.data_0) Serial.println("false");
    mydata.datastruct.data_1 = 1.3575;
    mydata.datastruct.data_2 = 314159L;
    mydata.datastruct.data_3 = 142;
    mydata.datastruct.data_4 = 0x50;



//----------write to FRAM chip
    byte result = mymemory.writeArray(writeaddress, arraySize, mydata.I2CPacket);

    if (result == 0) Serial.println("Write Done - array loaded in FRAM chip");
    if (result != 0) Serial.println("Write failed");
    Serial.println("...... ...... ......");
}
#

This program stores an object created from a struct to FRAM storage

#

But I don't understand where I2CPacket is given a value

#

Because it seems that that is what is actually storing the bytes of data to be written, but I don't understand how it is given a value

north stream
sage lichen
#

Woah thats super cool

#

Thanks!

crimson lark
#

Hey guys

#

I need some help

#

I'm just trying to make a circuit to control a servo using a flex sensor

#

So if someone can help me, that'd be great

#

Pls ping me if you can

#

Thanks in advance

#

<@&617066238840930324>

cedar mountain
# crimson lark So if someone can help me, that'd be great

The rule of thumb is just to go ahead and provide enough specifics for someone to be able to usefully answer a question for you and get you past where you're stuck. It's rare for someone to volunteer as a tutor and hand-hold you through the whole process, but many folks will be able to understand where you are and help you fix a bug or point you in the right direction for the next step.

crimson lark
#

I would also prefer to vc

crimson lark
#

But I made the circuit

#

Just need someone to help me check it

#

And I also have many questions

#

So I feel like vcing would be the most efficient wau

#

Way

cedar mountain
#

For a circuit review, #help-with-hw-design is probably the best place, if you can post your schematic and maybe point out areas where you are uncertain.

crimson lark
#

Okay thank you

sage lichen
#

Hey guys, I am facing an issue that has me stumped

#

I am programming an ESP-12f to read everything stored in FRAM storage into an array of objects instantiated from a struct

#

But for some reason, I am getting a software wdr crash after the setup function now

# 
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Wire.begin();
  delay(5000);

  i2cScan();

  sensorManager.begin();
  storageManager.begin();
  //storageManager.clearFlightData();

  const int dataSize = 250; //285
  AlphaStorageManager::DATA_t flightData[dataSize];
  storageManager.getFlightData(flightData, dataSize);

  for(int i = 0; i < dataSize; i ++) {
    Serial.print("Datapoint: ");
    Serial.println(i);
    Serial.print(flightData[i].g);
    Serial.print(",");
    Serial.print(flightData[i].a);
    Serial.print(",");
    Serial.print(flightData[i].alt);
    Serial.print(",");
    Serial.println(flightData[i].timestamp);
  }

  strip.begin();           // INITIALIZE NeoPixel strip object (REQUIRED)
  strip.clear();
  strip.show();            // Turn OFF all pixels ASAP
  strip.setBrightness(255);

  delay(500);
}
#

The crash is after the setup function but before the loop function

#

So I am super confused as to what could be the cause

#

Actually, it appears to be crashing inside of the loop function...

#

But inside of the loop function everything is commented out except for a function that has been working in the past and just interacts with a neopixel

tardy iron
#

memory corruption bugs can cause nonlocal effects that are difficult to diagnose

sage lichen
#

Interesting

#

So it turns out that I think the array I created was too large

tardy iron
#

overrunning an allocated array or structure is one thing that can cause a delayed crash in a future allocation. i guess exhausting heap memory is another

sage lichen
#

Yeah I think I was exhausting the heap memory

#

Because when I decreased the size to 50 it worked

#

Guess I should've known that I cant load 8kb into heap memory lol

tardy iron
#

depends on the device, i guess, and what else is in RAM

sage lichen
#

Actually never mind, I think I'll just paginate the data

#

So it only has to store 1/5 in memory at once

tardy iron
sage lichen
#

Ah never mind

#

So I was storing it in ram then

#

And I guess heap memory is a subset of ram?

tardy iron
#

yeah

cedar mountain
sage lichen
tardy iron
#

ah, i missed that part

tardy iron
cedar mountain
#

I'm not sure how the Arduino ESP framework works. If it's got FreeRTOS running underneath it, there may be separate (more limited) stacks associated with each task.

sage lichen
#

I ended up going with pagination

#

And just looping over pages of the data which can all fit within the memory limitations

#

Just needs to be able to spit it all out over serial so it'll work

#

Thanks for the help though @tardy iron @cedar mountain . Definitely wouldn't have figured out that it was a memory issue lol

neat shoal
#

hello 👋
excuse me i have problem with blynk app .. previously i was using the old version of blynk with esp-01 but now when i changed to blynk 2.0 it doesn't work properl ..
my circuit to display temp and humidity on blynk and controls the relay with one click bottom .. the sensor working and have data on blynk the problem only with bottom doesn't work

neat shoal
# neat shoal hello 👋 excuse me i have problem with blynk app .. previously i was using the ...

#define BLYNK_PRINT Serial // Comment this out to disable prints and save space
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>

char auth[] =

char ssid[] =
char pass[] =

#define DHTPIN 2
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);
SimpleTimer timer;

void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V5, h);
Blynk.virtualWrite(V6, t);
Serial.print("Temp = ");
Serial.print(t);
Serial.print(" Humi = ");
Serial.println(h);
}

void setup()
{
//pinMode(3, OUTPUT);
Serial.begin(9600); // See the connection status in Serial Monitor
Blynk.begin(auth, ssid, pass, "blynk.cloud",80);
dht.begin();

// Setup a function to be called every second
timer.setInterval(1000L, sendSensor);
}

void loop() {

Blynk.run(); // Initiates Blynk
timer.run(); // Initiates SimpleTimer
}

BLYNK_WRITE(V4)
{
// button was pressed
if (param.asInt() == 1)
{
digitalWrite(3, HIGH);
timer.setTimeout(60000L, relayOff);
}
}

void relayOff()
{
digitalWrite(3, LOW);
}

deft depot
#

is there an error message?

#

if they can't answer here maybe you could ask:
https://community.blynk.cc
maybe the new lib has a bug?
You said you did not change your code at all?

Blynk Community
Blynk Community

Friendly community of developers who build projects with Blynk. Ask questions and share your ideas.

terse lava
#

Hey all! Long time no issues 🙂
A more general question;
I'm using the VEML7700 to capture lux values and the VL53L4CX for distance. The VL53L4CX polls distance values very fast but the lux values take an integration time to capture (between 25ms all the way up to 800ms). Is there such a thing as continuing to run the rest of the loop while the VEML is still polling?

I ask because I'm trying to capture light with a diffuser over the sensor, so the integration time tends to lean on the higher end while using the AUTO method

sage lichen
#

So you can switch to one state while the sensor is polling, as well as store the time that integration began

#

And after each loop, if the state is set to "polling", check how long it has been since integration began

#

If the time is greater than the integration time, then you can switch into another state where you would complete the post-integration tasks and then go back into the original state to start over again

terse lava
#

ah, that would be very useful!

sage lichen
#

Yup!

terse lava
#

thank you! apologies for not being familiar with the term

sage lichen
#

No problem haha, don't worry abt it

tame sun
#

Hello, I am working on a project with the adafruit i2c rotary encoders and the 1x4 neokey. I have them both connected to my feather rp2040's stemma qt port(I2C1). I have just switched from circuit python to ardunio code and my question is: the example code I am trying to use for both these devices seems to be using the I2C0 bus on the feather. I can't seem to find a obviously to change what bus is being used. Is this possible? Thanks.

livid osprey
tame sun
tame sun
tame sun
livid osprey
#

Or Wire.begin(), depending on which bus you’re trying to initialize.

#

It’s similar to how one would initialize a Serial port with Serial.begin(baudrate), but without any baudrate argument.

tame sun
livid osprey
tame sun
tame sun
#

On the I2C1 bus(Wire1)

livid osprey
#

@tame sun Ah, the &Wire reference is inside the Neokey constructor. Try replacing “Adafruit_NeoKey_1x4 neokey;” with “Adafruit_NeoKey_1x4 neokey(0x30, &Wire1);” and see if that works.

tame sun
sage lichen
#

I don't know if this is the right place to ask or not, but I've run into a programming issue that I just for the life of me cannot solve

#

I am outputting a bunch of data over serial from my microcontroller, and I created a website that uses the web serial api and is supposed to read the data coming in over serial

#

It works sometimes, but other times it throws an error saying "A buffer overrun has been detected."

#

It should only be like 4kb of data, so I'm a bit confused as to how this could be happening on my computer

cedar mountain
sage lichen
#

Thanks!

sage lichen
cedar mountain
tardy iron
#

is your device streaming data over serial continuously, or only sending when requested?

sage lichen
#

Only when requested

#

I send a command "!flightData" and then it replies with the data and terminates with "!end"

#

And the strange thing is it works for a few times (with me refreshing the site between each attempt), but then after a few times it throws the error and doesn't work anymore

#

Even stranger, when I change the buffer size it works again for a few times before breaking once again...

#

Even if I decrease the buffer size

north stream
#

Sounds like the buffer is not being released when the data is read

sage lichen
#

Oh

#

Yeah I think that was it, thanks

sage lichen
#

Jeez actually that wasn't the problem either

#

Getting the same error again 😭

rich coral
#

anyone managed to get RP2040 Connect OTA working?

merry cargo
#

So, I've got a Feather 328P, and I'm looking for the Arduino equivalent of CircuitPython's touchio. Does that exist, or should I just give up and learn CircuitPython? 😃

solemn cliff
#

if I understand correctly, to do cap touch you put a large resistor to a pin and gnd, pull up then read and measure how long it takes to go back down, the longer the higher the capacitance, the more likely somebody is touching it

#

(not that it matters, there's a library for it)

pine bramble
#

;)

#

I've used a simple inverter (DIP package) as a kind of theramin input antenna. Floating inputs move around quite a bit if you bring your body close to them, at least sometimes they do.

merry cargo
turbid totem
#

Can I ask ESP32 questions in here or is there a better room?

tardy iron
#

are you using Arduino to program it? or you could just ask and we can redirect you if there's a better channel

turbid totem
#

arudino ide

#

I can get this ESP32 WROOM to power up via USB or via the 5vdc pin on the board. That said, I cannot get it to connect to wifi if powered via the 5vdc pin. I can only connect to wifi if powered via the usb. I've got 1a going to the pin which should be more than enuf. any ideas?

tardy iron
#

which board are you using? if it's an Adafruit board, what's the product ID? is your sketch possibly waiting for serial input from USB?

turbid totem
#

btw, tyvm for using pronouns.

#

mine are she/her

#

I think it's an adafruit board but I got it from a friend. It's soldered down now so I cant check. The sketch works if I d/c the 5vdc input and power the board via the usb on a battery.

#

so not usb input

tardy iron
turbid totem
#

tyvm

native dagger
#

That's how I did it 🙂

livid osprey
turbid totem
#

I'm using a NodeMCU dev board

cold lagoon
#

Help i cant burn the bootloader on my ATTINY 44A-SSU. The datasheet says it has a 20Mhz clock speed, which isn't available in the tools menu.

unknown.png
north stream
#

I see "External 20 MHz" as an option in the tools menu

cold lagoon
#

doesn't work either i've tried them all

north stream
#

What clock are you supplying to the chip?

cold lagoon
#

does it even have a internal crystal? or do i need a external. i thought i read that it hat an internal clock

cold lagoon
north stream
#

It has an internal RC (not crystal) oscillator, I don't know if the blank chips have that enabled or not. If so, you should be able to program them with the speed set correctly (if all the connections are correct). If not, you would have to supply an external signal.

#

A little web searching indicates the default CKSEL fuse bits are 0010, which should enable the internal 8MHz oscillator, so it should be flashable without supplying an external clock (unless the fuse bits have been changed to something else)

#

I see you have "Arduino as ISP" selected as the programmer, is that the programmer you're using (i.e. an Arduino running a sketch that allows it to act as an AVR programmer)?

cold lagoon
#

jeah i thought i missed something lol thanks 🙂

acoustic flume
#

hi, i have a tft here that claims to have a ili9341 driver, pinout is gnd, vcc, scl, sda, rst, dc, cs. im using the Adafruit_ILI9341 library, and the problem im getting is, it should be 320x240, it does fill noise/snow across all of the screen, but when i try and do a fillScreen on it, the first 80 pixels on the left of every row remains as snow, and a square 240x240, right aligned on the screen shows. anybody any idea why this might be?

inland gorge
acoustic flume
#

raspberry pi pico, but using arduino framework, and my pins are Adafruit_ILI9341(5, 6, 3, 2, 7) (SPI0 CS, DC, SPI0 TX, SPI0 CLK, RST)

inland gorge
acoustic flume
#

couldnt say, as im using platformio using platform = raspberrypi
board = pico
framework = arduino

inland gorge
#

without knowing the core, it's hard to say what Arduino pin numbers map to which GPIO pins. It's probably direct, but some cores map Arduino pin numbers to board pin numbers (e.g. on the Pico, GP15 is board pin number 20)

acoustic flume
#

is there any way of me figuring out which core it is from the core's source? also, ive checked the PinNames and the gpio pins are a direct mapping, p0 == 0

inland gorge
#

Try these pin choices instead:

const int tft_cs   = 5;  // SPI0 CSn, GP1, GP5, GP17
const int tft_dc   = 4;  // SPI0 MISO, but we're not doing readbacks
const int tft_mosi = 3;  // SPI0 MOSI, must be GP3, GP7, GP19
const int tft_sck  = 6;  // SPI0 SCK, must be GP2, GP6, GP18
const int tft_rst  = 7;  // any pin
Adafruit_ILI9341( tft_cs, tft_dc, tft_mosi, tft_sck, tft_rst);

(I like using named constants for these classes with long argument lists because I get confused args go when)

acoustic flume
#

same result

inland gorge
#

also, did you change your wiring to match?

acoustic flume
#

i did yes

#

not a fan of arduino ide. platformio is already installed, was hoping to shortcut having to write a ili9341 library for pico-sdk 😦

#

odd thing is.. is if i set the rotation, i can move those 80 pixels to the other side of the screen.. :S

inland gorge
#

I have used that library in Arduino, but I don't think I've used it on RP2040-based boards. It's just doing normal SPI though and I've used many other SPI-based TFTs on Pico. You could also try Arduino_GFX library: https://github.com/moononournation/Arduino_GFX

#

Do you have a picture or link for the TFT board you're using?

acoustic flume
inland gorge
#

Are you powering it with 5V or 3v3?

acoustic flume
#

tried with both

inland gorge
#

Looks like you need to short J1 if you want to power it with 3v3? It's not very clear

acoustic flume
#

it just works with 3.3 or 5v

inland gorge
#

that may be only for the touch screen part though

#

You may have better luck finding a forum for whatever Arduino core your platformio is using

#

Okay, maybe this works?

#include <SPI.h>
#include <Adafruit_ILI9341.h>
const int tft_cs   = 5;  // SPI0 CSn, GP1, GP5, GP17
const int tft_dc   = 4;  // SPI0 MISO, but we're not doing readbacks
const int tft_mosi = 3;  // SPI0 MOSI, must be GP3, GP7, GP19
const int tft_sck  = 6;  // SPI0 SCK, must be GP2, GP6, GP18
const int tft_rst  = 7;  // any pin

Adafruit_ILI9341 tft = Adafruit_ILI9341(tft_cs, tft_dc); // uses "SPI" by default

void setup() {
  SPI.setSCK(tft_sck); // "SPI" is SPI0, "SPI1" is SPI1
  SPI.setTX(tft_mosi);
  tft.begin();     
}
#

this is assuming the Arduino core you're using is the earlephilhower one

lyric pivot
#

Anyone else tried the VEML7700 lib

#

I cannot get it working at all

#

Returns a gain of 1 regardless of what I set it to, returns an integration of 100ms regardless of what I set it to, returns fixed 0 for every value regardless of how much light I shine on it

#

possible my ESP32 BSP is out of date as I look at closed github issues, checking

#

Fixed, ignore me then, away I disappear

I did indeed have to bump the BSP

charred tree
#

Has anyone tried the #4026 Adafruit Soil i2C Sensor soilsensor_example file in the seesaw library? I can't get it to work with my QT PY ESP32 S2. I'm using the Qwiic/stemma connector which on the QT board requres an extra line in setup Wire1.setPins(SDA1, SCL1);

sage lichen
#

Sorry if this is the wrong channel, but what would be the best way for me to make a simple desktop app?

#

I know pretty much every major programming language so that isn't a problem, and this app doesn't have to be pretty either

#

I usually would just go with electron / neutron and build it like a website but that takes a while and produces a huge executable

rough torrent
#

Probably wld be better in #help-with-projects unless your desktop app interacts with a Arduino.

My personal suggestion would be PyQt5 and pyinstaller, although tkinter can also work

sage lichen
#

ok

cold lagoon
#

can one arduino have two or more different i2c addresses? if yes how?

eternal cloud
native dagger
#

What's the reasoning behind #include-ing "Arduino.h"?

rough torrent
#

it includes the core Arduino API (so you can use pinMode, digitalWrite, delay, etc.)

#

usually needed for Arduino libraries or PlatformIO using the Arduino framework

native dagger
#

Huh

native kelp
#

not sure if i should ask here or in #help-with-projects but i've been trying to have an esp32 run on wifi as a webserver for a little smart home project, and for some reason after some time the esp32 somehow looses its ip address from my router, but it stays connected to it, and im not sure why is it happening

# 
void initWiFi(){
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi ..");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(1000);
  }
  Serial.println('.');
  if (!WiFi.config(local_IP, gateway, subnet)){
   Serial.println("STA Failed to configure");
  }

  WiFi.setHostname(hostname); //define hostname
  Serial.println(WiFi.localIP());
}``` this is how i connect to the internet
# 
void loop() {
  #ifndef ASYNC
  server.handleClient();
  #else
  
  #endif
  ArduinoOTA.handle();
  unsigned long currentMillis = millis();
  
  if ((WiFi.status() != WL_CONNECTED) && (currentMillis - previousMillis >=interval)) {
    Serial.print(millis());
    Serial.println("Reconnecting to WiFi...");
    WiFi.disconnect();
    WiFi.reconnect();
    previousMillis = currentMillis;
  }

  if(currentMillis - previousRSSIDMillis >= RSSIDinterval){
    previousRSSIDMillis = currentMillis;
    //Serial.print("WiFi Strength: ");
    //Serial.println(WiFi.RSSI());
  }

  if(WiFi.status() != WL_CONNECTED)
    digitalWrite(LED_BUILTIN, LOW);
  else{
    digitalWrite(LED_BUILTIN, HIGH);
  }
}``` and this is how i try to handle the esp32 disconnecting from the wifi
#

now i cant really easily debug the esp32 since its placed outside and i dont know how long does it take for the magical disconnected yet still connected state to happen

#

can there not being any serial connection to a device cause a problem, as i have Serial.begin(9600) and a bunch of serial print commands

#

although im not reading anything

cedar mountain
native kelp
#

hmm

#

alright

#

if i just remove serial.begin and leave other lines intact would it cause problems?

cedar mountain
native kelp
#

okay then, next time i get to flash the esp ill remove all the serial calls

cedar mountain
native kelp
#

yeaaaa

#

its a bit frustrating that you cant easily debug such a thign loll

solemn cliff
native kelp
#

nope

#

mainly because its not gonna be connected to a serial interface, so holding the whole thing up wouldn't make a lot of sense for me

#

i just used the serial for some debugging

solemn cliff
#

ah and I was mixing the threads with somebody else's problem somewhere else 🤦

native kelp
#

ah

acoustic flume
#

@inland gorge thanks for your help the other day. I've figured out what if was. The library needs a patch to fix some issues it has with rp2040. Gonna tidy up my code and submit a pr for it

inland gorge
lyric kindle
#

Has anyone ever figured out how to software reset a PCA9685 in the Arduino IDE? I have been tinkering with the PCA9685 without the library to learn the module in-depth at the registry level. .

chilly plover
#

I see a mention of a SWRST call that I presume can be sent as a command over the I2C bus.

#

Data sheet seems to cover it.

inland gorge
lyric kindle
native kelp
#

how can i completely disable esp32 sleep modes

#

so it doesnt go into sleep

#

unless it doesnt go into sleep modes on its own and requires code for that to happen

#

because im thinking maybe my problems are because it goes into modem sleep mode, which might cause it to still be sort of connected to the router, but not have an ip assigned

inland gorge
# lyric kindle Thank you, but that appears to be restart, not software reset, slightly differen...

I2C addr 0x00 is the broadcast address, it sends to all I2C devices. I don’t think you’re meant to send to that addr. My code sends to some I2C addr stored in the variable “i2caddr” and then writes two bytes: 0x00, 0x80

oh wait no, you're right Section 7.6 "Software reset" of the datasheet does send to the General Call (broadcast) I2C address. That's kinda bonkers to me but okay, NXP

tardy iron
#

it's part of the I2C spec but i hadn't previously heard of any devices actually implementing it before now. not surprised it's an NXP device, though

silk token
#

is the process for storing uint8_t in eeprom the same as int or do I have to modify this code I found? I am working with 15 byte rfid tag information from pet microchips
https://roboticsbackend.com/arduino-store-array-into-eeprom/

inland gorge
silk token
#

how would I modify it to use the correct amount of space?

inland gorge
# silk token how would I modify it to use the correct amount of space?

Your read & write functions become a lot easier. They could look like:

void writeUInt8ArrayIntoEEPROM(int address, uint8_t numbers[], int arraySize) {
  for (int i = 0; i < arraySize; i++) {
    EEPROM.write(address+i, numbers[i]);
  }
}
void readUInt8ArrayFromEEPROM(int address, uint8_t numbers[], int arraySize) {
  for (int i = 0; i < arraySize; i++) {
    numbers[i] = (uint8_t) EEPROM.read(address+i);
  }
}
silk token
#

thank you for the help! Is there a script to slim/strip code from libraries or does the compiler remove comments and whitespace and unused code segments?

north stream
#

Comments don't take any space, the compiler will remove anything that's blocked out with #if, #ifdef type stuff, but may not remove code it doesn't know is not to be included. I've several times modified libraries by carving out chunks with #ifdef so I can include them or not with a simple compiler definition

obsidian geyser
native dagger
#

ahhh ok thanks

fresh pendant
north stream
fresh pendant
#

Based on the source code of AdamNet-Drive-Emulator, it looks like "AdamNet" is just 8N1 serial on an open collector bus, with software arbitration. My interest is in replacing the controller portion of the network so I can interface to a keyboard.

torn panther
#

Can anyone provide a best practice on handling dual grounds when either developing with arduino (or similar micros) or with a finished system, where there's a potential ground loop. I've seen mention of using a device based on the ADUM3160 chip.

unknown.png
#

Mainly I'm interested in making sure my laptop is protected from any situation where it could be damaged by potential differences.

#

But also of course I want to avoid spurious signals that could affect proper operation of the setup

#

Clearly in the above example I could use a 12 V to 5V dc-dc converter, but some times that's not practical or I'm in development and don't want to deal with the extra component.

north stream
#

It depends on whether the DC supplies you use are isolated or not. If they're already isolated/floating, you're good to go.

torn panther
#

Thanks but how does one determine if a supply is isolated?

north stream
#

Some will be labelled, otherwise you can check for continuity between the mains plug pins and the output voltages.

torn panther
#

You mean literally checking static resistance with a DVM is a reliable check?

#

Everything nowadays is typically a switching supply, no?

#

as opposed to a transformer with an air gap

north stream
#

It's mostly reliable, but there are cheap supplies out there that don't follow all the recommended safety practices. The switching supplies use a transformer too, it's just a smaller transformer as it's operating at a higher frequency.

torn panther
#

I think this may be a good way to go.

#

thanks for your help. open to any other advice you or others may have

#

that device's 100mA limit likely an issue for some projects but I've seen others with greater capacity.

feral tartan
nova charm
#

will this ever been in stock? 😭

gilded swift
#

That’s the current lead time

nova charm
#

awesome. (dies inside)

#

thanks though

#

i saw the digikey lead time but i thought maybe the answer would be slightly more optimistic here

north stream
nova charm
#

around 20

north stream
#

I may have a tube of 25 lying around. They're blank, but I could flash bootloaders onto them

chilly plover
#

aliexpress seems to have some if your willing to risk it.

inland gorge
# nova charm around 20

Looks like All Electronics has some in stock https://www.allelectronics.com/item/ard-24/atmega328-w/arduino-optiboot-uno/1.html

All Electronics Corp.
ATMEGA328 W/ ARDUINO OPTIBOOT (UNO)

An ATmega328 in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board.Atmel's ATMega328 8-Bit Processor in 28 pin DIP package. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs up to 20MHz with ex...

nova charm
supple turret
#

I could, but that depends on the price.

hushed frigate
#

So i have an Arduino micro and an Ultimate GPS breakout v3. What program should i be running and how should i be wiring it?

solemn cliff
safe halo
#

Does anyone have any examples of using the Espressif TWAI drivers to talk over a CANBUS? I have 2 that setup as receive and Send and are using the code from the API documentation but they are not talking to each other.

sacred ivy
unique flame
#

That's edited. That display looks like one of these (Adafruit #181), and they aren't the size that that display is. Also, the screws are way too small and would be going into traces.

unknown.png
#

It's almost like they expect their audience to not know what those parts are

eternal cloud
#

it's a stock photo of an arduino in an acrylic case, with a LCD display mounted on top (or photoshopped on)

unique flame
#

not to mention the wifi symbol...where is the radio there

#

Am I the only one having flashbacks to those stock photos of soldering? [trigger warning: unsafe soldering technique]

SPOILER_unknown.png SPOILER_unknown.png
deft bane
#

new adafruit feather nrf52840 sense not showing in arduino com port list in arduino ide. pls help

deft bane
#

lol nvm it was the cable i hate cables

cedar mountain
#

Happens way too often...

chilly plover
#

USB hub got me the other day. Works for most things but I couldn't upload to the mega I was using.

sacred ivy
#

I kind of figured it was shopped but I was also hoping it would be based off a real product.

north stream
sacred ivy
#

Honestly thats what I thought it was

north stream
livid osprey
#

But holy moly that is a tiny 1080p. I assume those are probably intended for a be headset or something?

modern seal
#

I can't find too many people that have experience with the USR-ES1 ethernet shield.. anyone here that does, is it a pretty good shield?

#

Follow up question to that, if anyone here has... I imagine it would work with the Seeduino XIAO, yes?

north stream
pine bramble
#

Ok. Odd question. Whilst using a metro esp32. I’m using a 0-5V sensor and using analogRead. When I print it to the serial monitor. Im getting a value of 1470. Maybe I’m out to lunch here

#

But isn’t it 1025?

cedar mountain
pine bramble
cedar mountain
#

Note that it's a 3.3V chip, so you don't want to give it a full 5V signal.

pine bramble
#

Wait.

#

So if I put 5V on the analog in it kills it

#

I’m familiar with arduino uno boards. But wanted to step the game up here. So I got the this metro.

cedar mountain
#

Possibly, yes. You may be able to use a resistor divider to reduce the voltage.

pine bramble
#

Sounds like I need to find 3.3v sensors if I’m going to use this board.

#

Sad.

faint raft
pine bramble
#

You mean a resistor to step the voltage down?

cedar mountain
#

Many sensors will be happy with either voltage sometimes.

pine bramble
#

I appreciate all the help also.

#

Thank you both

faint raft
#

logic level shifter is the name I was looking for

pine bramble
#

I will have to google that I suppose

#

Am sure I’m not the first person to cross this bridge

faint raft
cedar mountain
#

A level-shifter wouldn't generally help with analog sensors.

faint raft
#

oh, yeah, forgot that it was analog

pine bramble
#

Interesting. Here I was gonna look for a new board that maybe had the ability to still do wifi stuff but handle 5V more robustly

cedar mountain
#

Same. Any logic shifter only deals with 0 and 1, not intermediate analog voltages.

pine bramble
#

I think maybe a different sensor and or controller will do the job. Or at least the answer that’s coming into my head.

faint raft
#

I think I was thinking they were using like a breakout board with i2C or something, not the "raw" sensor itself, my bad, sorry for the confusion

pine bramble
#

Just raw sensor. Sorry I didn’t specify clearer.

safe shell
#

a voltage divider as Ed suggested would be pretty easy, the 0-5V analog input range would become 0-2.5V with equal resistors (lose some precision), or you could choose resistor values to give better precision and use closer to the full 0-3.3V range

granite lily
#

I had a general quesiion on arduino and arduino like products. Often times there are more pins than ports on the actual microprocessor. Does this mean that DigitalRead/Write handle dealing with muxing ?

solemn cliff
#

more pins than ports ?

#

do you mean that not all MCU pins are broken out ?

tardy iron
#

note that the term "port" as used in most MCU datasheets often means a grouping of GPIO pins that can be accessed together using a single I/O operation (though the Arduino API mostly doesn't expose this)

native dagger
tardy iron
native dagger
#

neat

tardy iron
#

i think some 32-bit MCUs have GPIO ports that are 32 bits wide, though i think not all do

#

sometimes not all bits of a GPIO port are present on the chip pinout, and sometimes they're not even all present on the die! but this gets into all kinds of design tradeoffs that the designer makes

native dagger
#

by that you mean 32 GPIO per port?

solemn cliff
#

that did make me second guess is that all chips usually have more pins than port, so maybe the answer is: yes ?

#

as in: setting an individual pin is done by bitwise operations on the whole port (like changing one bit)

tardy iron
solemn cliff
#

yup

tardy iron
granite lily
#

The MCU i have in mind is SAMD51

# 
#define PIN 47


void inter() {

int val = digitalRead(PIN);
digitalWrite(13, val);

}

void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
digitalWrite(13, HIGH);
delay(1000);
digitalWrite(13, LOW);
  pinMode(PIN, INPUT);
digitalWrite(51, HIGH);
//attachInterrupt(digitalPinToInterrupt(52), INT52, CHANGE);

}

void loop() {
  // put your main code here, to run repeatedly:

Serial.println(digitalRead(PIN));

}
#

Any idea why this just keeps outputting 1?

#

I connect pin 51 to pin 47 (and disconnect it, 1 no matter what)

tardy iron
granite lily
solemn cliff
#

does pinMode INPUT imply a pull down ?

#

(I would say no)

granite lily
#

I tried it with , INPUT, INPUT_PULLUP, and INPUT_PULLDOWN

#

all 3 do the same thing except that pulldown is always 0 instead of always 1

#

by the way my board is a Grand Central in case thats important

tardy iron
#

have you checked the voltage on pin 51?

granite lily
#

yes I set 51 to output and got like 3.18 on that, and same with 47

tardy iron
#

i would suggest putting a delay in your loop() so you're not constantly flooding your serial port with output. and your serial console is set to auto-scroll?

granite lily
#

how do i check that auto scroll thingy,

#

i really should update to the non beta 2.0 ide

tardy iron
#

which version of the Arduino IDE?

#

there should be a checkbox or something on the serial console window

#

but i haven't used the Arduino 2.0 IDE yet

granite lily
#

ok yes autoscroll is on

#

I put in a delay as well, still no difference

tardy iron
#

are you still running exactly the code you posted before? can you describe exactly what physical manipulations you're doing during your test?

granite lily
#

etc...

# 
#define PIN 47
#define PIN_POWER 51


void inter() {

int val = digitalRead(PIN);
digitalWrite(13, val);

}

void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
digitalWrite(13, HIGH);
delay(1000);
digitalWrite(13, LOW);
  pinMode(PIN, INPUT_PULLDOWN);
digitalWrite(PIN_POWER, HIGH);
//attachInterrupt(digitalPinToInterrupt(52), INT52, CHANGE);

}

void loop() {
  // put your main code here, to run repeatedly:

Serial.println(digitalRead(PIN));
delay(1000);

}
#

current code im running

tardy iron
#

and what does it print?

granite lily
#

0
0
0
0

#

etc...

tardy iron
#

regardless of whether 47 is wired to 51? can you show a photo of your setup with the wire in place?

granite lily
#

the green wire is the one that is in use

tardy iron
#

have you soldered the header pins to the board? can you show a photo of the solder joints?

granite lily
tardy iron
# granite lily

did you intentionally only solder the pins you were planning to use?

granite lily
#

yep, the solder job is crude but it works for.. well at least 51 and 47. (its old solder)

#

I have also tried using a tipped wire to connect directly (on the back of the board) yielding 0 success

tardy iron
#

if you connect pin 47 to 3.3V, does it read as 1?

granite lily
#

HEY yeah that worked

#

i connected it to 5v

#

You think im not meating the threshold for interrupt?

tardy iron
#

don't do that

#

i'm pretty sure it's a 3.3V logic chip, so giving it 5V might damage the input buffer or other parts of the chip

eternal cloud
#

it is

tardy iron
#

did you set pinMode(51, OUTPUT) anywhere? i think digitalWrite() doesn't automatically do that

granite lily
#

ok wow it all of a sudden works

granite lily
#

which is why i never use that accursed function with timer inturrupts

#

😛

tardy iron
#

yeah, i just remembered that digitalWrite() might not change the pin mode, because setting the pin high when it's set as input is one way that you turn on pullup on AVR chips

eternal cloud
#

you didn't change anything in the code? and it suddenly works ?

granite lily
eternal cloud
#

then you might reaaaaaally want to reconsider the solder job around those pins

#

it looks messy at best

granite lily
tardy iron
#

yeah, bad jumper wires happen sometimes

granite lily
#

the thing is , the terrible solder job, made it so that using the back of the board did not work

eternal cloud
#

so do flaky solder joints, that sometimes work, and other times don't

granite lily
#

You may be onto something with this solder joint stuff snakey

#

I just used the same wire, and it worked

tardy iron
#

5V might have made large currents flow through the pin due to the protection diodes, so might have locally melted parts of marginal solder joints

#

this is not a recommended technique for solder reflow

granite lily
#

noice, so if i have issues with pins, just OVERvolt them

eternal cloud
#

that's how you meet sparky

granite lily
#

Oh I made a spark Ring once, i connected 12v DC to a metal ring, like both GND and V+

#

roomate was anger, but not as anger as when I lit napkins on fire in a bowl

#

Thanks for the help guys

safe halo
#

I have a byte array that I am trying yo convert to a double . The number being sent is 3107. The number is being converted to an 8 byte array that is being sent is to my receiver. it is
035,012,000,000,001,000,000,000
How do I now convert these bytes back to an array?
I have tried using a memcopy to assign it but it comes back as blank.

  memcpy( &f, vals, 8 );
  Serial.println(f, 0);```
north stream
#

Could be a byte order issue

indigo cargo
#

I'm starting my first foray into an LED project and I'm wondering how people go about choosing which microcontroller they use

cedar mountain
unreal yacht
#

Hello, Can somebody help me in Parsing the DataString recieved = "blhk,215,255,86,255\n"; Which i'm sending via serial to my arduino, I need to split the 4 set of integer values and assign them to separate variables
Like
int red = 215;
int green = 255;
int blue = 86;
int white = 255;

#

i know there is strtok method to split the character array into tokens but in my case, it's not charachter array instead it's String Format

unreal yacht
#

okay, nevermind, i solved it using Substring method and indexOF

cedar mountain
pine bramble
#

Thanks also @cedar mountain

safe shell
#

@pine bramble feel free to post circuit, code, or unexpected output... anything where more eyes may help

pine bramble
safe halo
#

how do you format a number on printf to have 3 leading zeroes and 3 trailing zeroes? I have tried this but it isnt working

    Serial.printf("%3.3f,%3.3f,%3.3f\n", x, y, z);
north stream
#

I think you use the leading zero flag (a zero first in the format specification), then set the field width to the entire thing (3 zeros before plus a radix point plus 3 zeros after would be 7 characters wide), so something like %07.3f maybe?

pine bramble
#

@safe shell @cedar mountain this ended up being the best way to display it as I use tinker cad on the web and haven’t dipped my toe into the fritzing tub yet.

IMG_9137.jpg
#

Generic sensor I’m using.

#

I should specify also

#

I’m using the Metro328 Esp32-S2

#

My sketch is nothing more than analog read and serial print

#

But I get very strange inconsistent inputs on A0

#

I’m leaning on that it’s a cheap sensor but then I’m wondering too if I am missing something?

cedar mountain
pine bramble
cedar mountain
#

One thing that strikes me as a little bit suspicious is that the resistors are relatively large. Depending on the chip, ADCs will usually specify a typical input impedance, since they have to draw a bit of a current from the signal to read it accurately in a short sampling time. So having too large resistors might result in distorted readings. Adding a little capacitor at the input pin to buffer the voltage might help if that's happening.

pine bramble
# cedar mountain One thing that strikes me as a little bit suspicious is that the resistors are r...

I ended up on those values because reading on the arduino forum there was talking you go too low you’ll pull the pin to zero via the resistors. But then I’m a pretty big novice so the recommended ratio was that but using 100k on the out of the divider sort of forces you into that ratio. I also read sometimes it’s beneficial to add a cap on the input pin. But I’m guessing here that by input impedance that you’re saying, if you choke out any current on the input to the chipset it has no forward bias to the adc? Because it’s stopped flat as opposed to directly having all the current the sensor would output?

cedar mountain
pine bramble
#

Maybe my input to the adc is too great. I will try to lower it I think I have a good selection of resistors on hand

#

I wouldn’t think I’m the first person to cross or burn this bridge

cedar mountain
#

It may not be your actual problem, just a possibility.

whole dagger
#

Maybe you have to put a certain load resistance on the sensor. The sensor specs say something about that, but it really makes no sense.

IMG_0450.png
pine bramble
#

Really the actual fix is to buy a reputable sensor from a reputable source with proven data sheets. The issue becomes at that point I could just build a plc out of industrial hardware. That’s not a part of this experience and learn tho.

autumn oxide
#

I can't get my trinket to show up on mac or windows. I tried the cord with other devices and they appear. The trinket appears in devices but not as usb.

livid osprey
autumn oxide
#

Did both

livid osprey
autumn oxide
#

I did the driver part but not the bootloader drive I can't access it as a drive.

autumn oxide
#

I misread what you said. Yes I have gone through the bootloader pages.

tardy iron
#

which Trinket is it, exactly? can you link to a product page? note that there are warnings about how the bit-bang USB used by the earlier Trinkets isn't compatible with many modern computers and OSes

autumn oxide
#

I used a usb hub.

#

I'm using a 2012 mbp and windows 10 computer with a usb hub.

#

When I bought this I thought I got the m0. Once I went to use it I realized it was not.

tardy iron
#

i'm pretty sure that non-M0 Trinkets won't mount as USB storage devices

livid osprey
#

Ah. @autumn oxide were you expecting it to mount as a drive? It should not, it doesn’t have that capability by default. You’re supposed to flash it using the arduino ide or similar programming tool.

#

If your pc can enumerate it as a Trinket, you should be able to configure Arduino IDE to program it.

autumn oxide
#

Yes I was.

#

I want to use it as a payload injector

#

I wonder if I can use it for switch modchip like trinket m0

#

But just flash it using arduino ide instead of transferring through USB.

#

There are 2 uf2 files and a bin file

tardy iron
livid osprey
livid osprey
autumn oxide
#

Thr bin is used for any payload injector. But considering I can't flash the uf2 files it wouldn't work. I don't know much about stuff like this. I know a bit about the pico, arduino uno and uno based 3d printers.

#

Thanks for the help.

pine bramble
#

Actually now that I post it I see an error

#

The .12 is actually the conversion for the resolution

#

and the 830 is the base number I took out of the sensor for zero

#

I have it at about 1atm or 14.4psi at open. I'm going to connect it back to my air compressor and see what it do.

#

I guess if you see something weird with my code do let me know.

#

Oh also.

#

I lowered the divider resistance

#

to 570 and 1k respectively

#

the number seems much more stable now. But of course thats not at any sort of load on the sensor either.

#

I get close to a .5-1psi differential as it floats along there.

cedar mountain
#

This is the 300psi sensor? I think it advertises something like a 0.2% full-scale error, so that'd be about 0.6psi.

pine bramble
#

yes

#

looking

#

looking at it point to point is smaller. But maybe I could slow down the readings?

cedar mountain
#

You might also consider reading and averaging several values.

pine bramble
#

Thats actually a good idea

#

I will have to google how to keep furthering the math in the code however. I'm a dumb sparky by trade so this is new world for me.

#

ok a bit of plumbing and resetting the whole setup and I'll let you know how I fare.

pine bramble
#

this is approx 115psi.

unknown.png
#

swing and a miss

cedar mountain
#

Let me double-check your conversion formula, hang on. The 830 offset seems weird at first glance.

pine bramble
#

looking with a meter mid stream I'm getting about 1.2vdc

#

I came up with 830 offset just leaving the sensor at atmosphere pressure.

cedar mountain
#

I get that it should be about psi = (value - 395) * 0.095 from the specs, but that doesn't match what you're seeing at atmospheric pressure, so that's a bit weird.

pine bramble
#

Yeah without the fudge factor and conversion to psi

#

Just raw reading at 110psi I’m getting 3869 from the analogread.

cedar mountain
#

That's quite odd. Maybe they sent you a 100psi sensor instead?

pine bramble
#

I’m wondering that.

#

The printed thing on the side says 300 but that means nothing

#

So if the metro input is good for 3.3V

#

And I’ve got a voltage divider at 2.5V max center potential

#

That’s uhh

#

75% of full scale

#

3070 would be the possible resolution?

cedar mountain
#

Your divider center should be higher than 2.5, since the resistors aren't even.

pine bramble
#

Let me measure it again to verify

cedar mountain
#

Should be 5V->3.2V for 570/1k, I think.

pine bramble
#

I think my math is correct

#

Assuming that VCC is going to be 5V max

#

But actually the sensor is 4.5Vmax

#

So my math is even worse

#

Holy crap. If that’s right my Vmax at my voltage divider is 1.53

cedar mountain
#

I think you have that backwards... The 1k is on the ground side, right?

pine bramble
#

Yes

cedar mountain
#

So it should be like 3.5V, not 1.5V.

pine bramble
#

Oh god

#

Yes

#

Darn it

#

That’s not Vout. That’s V drop across r1

#

3.47 is Vmax

cedar mountain
#

Easy mistake to make. It's good to develop some intuition for which side of the divider is the majority or the minority.

pine bramble
#

Which at 110psi I have 1.2V to A0.

cedar mountain
#

I wonder if the ADC is configured to use an internal lower-voltage reference instead of the 3.3V rail by default?

pine bramble
#

Hmm. I will pull the data sheet on Adafruit

#

I don't see anything about it being other than 3.3vdc

#

So curiously.

#

hear me out here.

#

ah nvm

#

I'm running low on brain power on this one...

pine bramble
#

Going to contact the manufacturer. Because outside of the arduino sketch just verifying output at 150psi I should have 2.5VDC. I do not. I have about 1.8.

#

Faulty sensor perhaps

cedar mountain
#

Stupid question, did you check the 5V rail with the multimeter, just to make sure it's not being powered from 3.3V or something?

pine bramble
#

Interestingly enough I did

#

I actually abandoned the metro all together just to isolate the sensor

cedar mountain
#

Good thought.

pine bramble
#

At 110psi I’m getting 1.8V. Which isn’t even close to the 2.5V as advertised.

#

I’m going to start from square one on this and go back to the beginning.

#

Tomorrow I’ll make an excel file doing all the math clearly laid out

#

So I’m not working over myself

#

I do appreciate the help though

autumn oxide
#

Well I bought an m0. But is there anything useful I can use the other one for?

gilded swift
autumn oxide
# gilded swift Making a simple data logger

Maybe, I'm kind of annoyed I accidentally bought this microcontroller. I looked up trinket m0 and I got the cheapest one according to the filter and didn't notice that the led was not in the center.

gilded swift
#

Admittedly you can do more in Arduino with the M0, and there’s lots you can do for optimization as well

autumn oxide
#

Yeah the original seems pretty useless. I have plans for the m0. It's going to be a payload injector.

north stream
#

It's fairly limited, but hardly useless. I've built them into several things.

livid osprey
north stream
#

I built one into this LED projector

led-projector-v7-closeup.jpg
mild nova
stoic scroll
#

Hi all, anyone has experience with M5StickC esp32 wake up feature using multiple external GPIO's? I am using esp_sleep_enable_ext1_wakeup(BIT_MASK,ESP_EXT1_WAKEUP_ALL_LOW) and BIT_MASK = 2^26+2^25 in hex but it doesn't work. However , it works if I just pass one GPIO.

cedar mountain
inland gorge
stoic scroll
cedar mountain
stoic scroll
inland gorge
stoic scroll
inland gorge
stoic scroll
cedar mountain
stoic scroll
cedar mountain
#

Not that I can see, unfortunately.

stoic scroll
cedar mountain
stoic scroll
charred light
#

Anyone know how to fix the error below while trying to upload to a Circuit Playground Bluefruit in the Arduino IDE?

"RuntimeError: Click will abort further execution because Python was configured to use ASCII as encoding for the environment."

#

I've tried updating the LC_ALL and LANG variables but still getting the problem

eternal cloud
charred light
#

I'm actually preparing 10 for my students.

eternal cloud
#

Just to make sure, did you put it in bootloader mode for the first program ?

charred light
#

Yes I did

#

I tried it in bootloader and non bootloader mode. I've downloaded the additional board definitions and have it setup to build using the Bootloader DFU as the programmer.

charred light
eternal cloud
#

Hopefully someone else saw this before and has a solution

pine bramble
#

@cedar mountain as an update this is what I looked at today

#

And @safe shell if you’re interested in my foray into cheap sensor stuff

cedar mountain
#

Cool. Note that the linear scaling is a little inaccurate because the sensor outputs 0.5V at 0psi, whereas you're assuming 0.0V.

pine bramble
safe shell
#

does it output 4.5v at 300 psi?

pine bramble
#

You’re right

pine bramble
#

I’ll bring it with me tomorrow and put it on a real pressure calibrator and see.

safe shell
#

I'd start with simple psi-to-voltage data.

#

What's the significance of the 2.8v?

pine bramble
#

I’m using a voltage divider to drop the voltage so it will be handled by the adc on the esp32-s2

pine bramble
safe shell
#

ah, right, so 2.87 is your max input voltage

pine bramble
#

Yes

#

I wondered initially if I had just missed something in the arduino side of the world but I’m leaning on it being a faulty sensor

#

I was however bummed that it wasn’t 1-5V on the esp32 but that’s more my fault of spec looking than anything

safe shell
#

if it's linear response of voltage to PSI, and if 0.5v=0PSI and if 4.5v=300PSI, then 110PSI should be 1.47v ?

#

I may have missed it, but there is no datasheet showing V/PSI response for this sensor?

pine bramble
#

It’s listed on the Amazon page. Let me ss it

#

As far as actual “data sheet” ehhhh. I’m sus it’s not that accurate a thing

#

More of “in shenzchen I have 8000 of these dohickeys to sell”

safe shell
#

I think you've identified the possibilities... faulty, wrong sensor, not as to-spec as advertised. But a few across the PSI-range readings of raw voltage will sort that out

#

(I'm assuming no faulty fluke 😉

pine bramble
#

What’s funny about that

#

I have a degree in electronics and had to do a bunch of labs. But I followed the instructor about using their crappy “ELENCO 100” or whatever.

safe shell
#

it's possible, but occam's razor

pine bramble
#

I have such high confidence in that crappy meter that when I bought my fluke 87 to treat myself after school. I tested the source voltage with the ELENCO as a verification method for the fluke.

#

Meanwhile the fluke probably costs hundreds more

#

But that stupid crappy ELENCO never lied. Ever

#

It was always me not using it right

#

Simpson is a nice meter. ;)

#

My ELENCO never lied and my cheap scope never lied.

pine bramble
#

They have a nice pop out thing for if you take a measurement way overrange.

#

I actually bought some Simpson analog metering stuff for monitoring current on a circuit just the other day. It’s always nice stuff.

#

I think when you push it back in it actuates a relay.

safe shell
#

it's good that you build some slack into your voltage range... the esp32-s2 doesn't handle the extremes well

#

comt to think of it though, it may not be able to measure more than 2.6v... lemme check...

pine bramble
safe shell
#

what ADC pin are you using?

#

(GPIO1-10 are best)

pine bramble
#

I jumped to GPIO pin 6 last night being sus of that

safe shell
#

a 2.5V range at 12 bits should give plenty of resolution for this sensor

#

precision beyond the accuracy I suspect

pine bramble
#

I would assume that’s the case

#

Honestly I’m shocked, that Adafruit doesn’t sell a similar sensor.

#

Wouldn’t think I’m the first to be here

cedar mountain
#

Not the first, but it's relatively specialized. Most people never encounter pressures higher than their car tires.

pine bramble
#

I could agree to that. This was really an exercise for my air compressor anyway.

#

Either way how this fares. I appreciate all the help

pine bramble
#

i have a feather esp32-s2, and i uploaded my sketch to board and seems to be working ish?... can't quite tell as there are bugs in the code.

#

but now the board isn't showing up as a port

#

it is showing up as a removal drive.

#

any ideas?

#

You may have to reinitialize it using the button for it to communicate. At least I have to with my metro 328 esp

#

reset button?

#

yeah.. that didn't work

#

Let me look at the guide

#

Have you walked through this yet?

livid osprey
#

@pine bramble wrong esp32

livid osprey
pine bramble
livid osprey
#

No worries, you’re certainly not the first to mix up a v2 and an s2. Not by a long shot.

pine bramble
livid osprey
#

Are there any files?

pine bramble
#

which is the board

livid osprey
#

Ah, it's loading up into bootloader mode for some reason. Either the boot signal is being pulled the wrong way on power-up/reset, or something in your sketch/IDE is configured wrong.

#

@pine bramble If you try to upload a sketch without a port, (I believe) it should auto-detect a board in bootloader mode and upload the code anyway. You can go ahead and try again, or post more source code/screenshots if it persists.

pine bramble
#

sure give me a few minutes.

#

my embarassingly bad source code

livid osprey
#

Doesn't look like a source code issue, but I don't recall seeing THAT many upload options for my ESP32-S2.

#

Then again, I have had some poor experiences getting esptool.py to work the way I want it to.

pine bramble
#

yeah. i just left it as all the defaults i didn't want to touch something wrong

livid osprey
#

Maybe someone with more recent experience can help?

gilded swift
pine bramble
#

yes

#

windows 11

gilded swift
#

If you hold boot and press reset, do you get a com port under device manager?

pine bramble
#

hold on i will do that now

#

that might have done it, let me go try in ardunio

#

i was able to select a port, and now i'm trying to upload.

gilded swift
#

Sometimes on the first go you have to put it in download mode, from there it should be auto detected after you upload your sketch

pine bramble
#

thanks

gilded swift
#

Got it working?

pine bramble
#

yeah. i'm able to upload... i just need to figure out whats wrong me source code...

gilded swift
#

Awesome 😎

hoary canopy
#

Has anyone played around with HamShield or ham radio on Arduino? Looks like the HamShield project is done and I don't see an alternative

north stream
hoary canopy
#

Like if it detects a specific tone on a frequency, the arduino can control a basic robot, then answer back on the frequency

north stream
#

That's an interesting use case. There are some nice low-power HF transceivers out there (RockMite, etc.), but FM is less common. I hadn't been familiar with the HamShield or the AU1846 chip it uses, that was a neat little niche product. I might look into getting a low end HT and just connecting the audio/PTT to an Arduino, possibly along with a serial control link if you want the Arduino to be able to control it as well.

#

While the HamShield is open source, so it wouldn't be hard to get boards made, there are a lot of specialized parts on it, so it might be tricky to assemble one of your own.

#

Poking around, I find there are a few similar projects out there like the ArduTrx (based on Dorji or NiceRF HF modules), the Arduino Walkie Talkie (based on NiceRF or Sunrise modules), and assorted APRS projects that could likely be leveraged for your uses (searches for APRS and Arduino bring up lots of things)

hoary canopy
#

A DIY HamShield is for sure an option. I've printed & assembled a few PCBs thanks to the help of the people here. Though since the main goal isn't really to assemble a PCB I would've liked to have a mostly ready board. ArduTrx also looks good. I'd have to see which one I could reasonably fabricate

#

It's true that it could simply be a cheap ham transceiver, with the mic in & speaker out connected to the ardunio. That would technically be all I need, no need for it to be able to change frequencies or Tx power by itself

hoary canopy
cedar mountain
#

Not directly, no. You could send audio as data, but that would be up to your software.

hoary canopy
#

Ok thank you. Then maybe a better option for me at this point would be a Pi with one of the USB transceivers

supple turret
#

Is that.... An Adafriut board, without a QT?!?

livid osprey
#

Unless we’re looking at two different things, which is also entirely possible.

supple turret
#

I've always fancied having a play around with LoRa, but using a Pi of some kind.

odd fjord
supple turret
odd fjord
#

as do the breakouts.

supple turret
#

I suppose I don't need LoRa.. but it would be nice for a toy. Lol

hoary canopy
#

For me the idea's a remote model rocket launcher. Setup the rocket, then walk back and enter a sequence on the ham radio. The launcher would detect that sequence and transmit back a countdown

cold lagoon
#

Hi its me again :). Im trying to upload an bootloader to an Attny44 which is mounted on an PCB (with no other components soldered on) Im getting this error:
avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override this check.

I've already tripple checked all connections but they're fine.

inland gorge
cold lagoon
#

im using an arduino uno. but the problem seems to be the pcb or the chip. i 3d printed an SOIC Clamp to programm a nother attiny44 thet was not mounted on the pcb and it worked fine

copper laurel
#

Hi, it was suggested I ask for help here with the rtc+sd adalogger I have.

I'm able to make the feather m0 it's on Blink, so yay for some connectivity, but when I try to send an example from RTClib the arduino IDE just says 'uploading' endlessly. Mu claims nothing's connected at all.

pine bramble
#

Isn’t mu the python editor?

copper laurel
#

Yes- the feather says it works on either arduino ide or micropyton via Mu, so I tried both

#

More success with the arduino ide (Blink works on the M0)

copper laurel
#

the feather boards are stackable, so I've been hoping to make them actually work when stacked

rough torrent
#

Mu is typically used for boards that have CircuitPython installed, and Arduino and CircuitPython can't co-exist at the same time.

#

Can you post the full error? (make sure to enable full errors and warnings or whatever its' called in preferences during compilation and upload and then do a pastebin here)

copper laurel
#

The error, seens in arduino ide, is that it simply says 'uploading' and stays there, never advancing to either 'upload failed due to X' or to 'upload successful'

swift wind
#

can I use the adafruit image reader library to load images from a sd card which is connected to an arduino via a sd card adapter

pine bramble
#

It must be either the sensor output doesn’t enjoy my voltage divider and or the input of the s2 doesn’t enjoy it either.

cedar mountain
#

Yikes, that 200psi point is awful...

pine bramble
#

Yeah. Not great is it.

#

Wait

#

Let me check my numbers again

#

I misclicked

#

I had missed a digit. Good lord

cedar mountain
#

Cool, much better.

pine bramble
# cedar mountain Cool, much better.

I went ahead and ordered a metro mini 5V version and I’ll see what that yields in terms of not messing with the output. Although I’m still at a loss why the voltage divider didn’t end up working.

cedar mountain
#

My best guess is something funky with the ADC reference voltage, but I'm not familiar with the S2 there.

safe shell
#

@pine bramble What was the issue with the voltage divider? ESP32-S2 only goes to 2.5v analog in. There is also a calibration value in efuse, but it doesn't typically change the curve that much (up to ~10%).

#

Is this Arduino? I haven't used it for ESP32-S2, but I would hope they're using the 11dB attenuation by default (0-2.5v).

charred light
#

I'm still struggling with this problem. Updated locale and language variables in my terminal. I'm going crazy

Screenshot_2022-10-03_at_10.21.28_PM.png
#

Anyone have any ideas?

pine bramble
#

I would have 1/3 scale readings off of an air compressor and the readings on the metro 32-s2 were really erratic.

pine bramble
#

@charred light ^^

#

probably stuff a config file such as ~/.cshrc with a command to set the required environment variables.

charred light
#

They're in my .zprofile and bash_profile

pine bramble
#

Probably not detected so needs tweaking (change the spelling, capitalization &c.)

charred light
#

If I look at my locale in terminal all of the UTF options show but when I build in the Arduino IDE I get the same error. Is there a way to force environment variable in the IDE?

pine bramble
#

Is it an old version of CPython?

charred light
#

I've only got one Python3 interpretter on this machine. The one that is bundled with xcode

pine bramble
#

Yeah I don't recognize that environment; the early part looks like Arduno C++ compilation, but then all of a sudden CPython shows up to say 'tada'. Platformio comes to mind, some.

charred light
#

Yeah, I'm pretty sure it compiles and links everything with the adafruit-nrfutil (which I think is Python) so somehow when it's opening that Python script it is not receiving my local variables

#

I'm downloading Arduino 1.8 to see if it builds there

pine bramble
#

Okay got you - I have seen some of that. In Linux I think that stuff lives below ~/.arduino15 and yeah it can be Python.

#

I have 132 python scripts in that subdirectory structure. ;)

#

I have played with it -- edited scripts found in that tree. STM32 cube had a script down there iirc and I messed with it to get it to 'go'.

#

The Arduino IDE was in no position to validate those scripts so it just runs them as it finds them. I don't know exactly how the hooks get installed, but you can probably modify any script in that tree.

charred light
#

It builds in Arduino 1.8

#

-_-

pine bramble
#

;) At least you'll be able to use your time for something besides finding bugs in the dev environment. ;)

#

try typing pytho and hit tab two or three times, in Terminal.app. In Linux this is how I quickly discover I'm in python3.9.

silk token
#

hello! I am needing assistance with some code, I would try to do it the hard way and solve the issue myself but I am hosting people who's homes were caught in the hurricanes eyewall for 12 hours and my study space is occupied by speaking people who distract me, the issue is as follows:

I need to convert RFID tag information sized as uint32_t into uint8_t[4] The RDM3600 library uses uint32_t for everything but storage in EEPROM as uint8_t would be easier for me for various reasons. This is the code I have found elsewhere (SO and blogs) I have yet to test it but I wanted to run it by more experienced C/C++ coders who can point out any errors for me. I had one before the storm hit but I started writing code to begin testing various control flows and it will take some time to replicate the error.

Platform is arduino mega, I plan on using a nano for the finished product, thank you in advance for any assistance.

uint8_t convertu32_to_u8(uint32_t number_to_convert, int method){
    if (method == 1){
        uint8_t *arr;
        //uint32_t Tx_PP= 0x02F003E7;
        arr=(uint8_t*) &number_to_convert;
        return &arr;
    }
    if (method == 2){
        union {
            unsigned long the_number;
            unsigned char bytes[4];
        } Converter;
        Converter.the_number = number_to_convert;
    }
}

I swear to god they see me typing code and studying and just ignore the fact I am focusing on something else and demand my attention like entitled brats

pine bramble
safe shell
safe shell
junior crane
#

So I have a project where Adafruit itsybitsy is the controller and it is The I2C controller of a SMBus switch which controls 2 retimers

#

My ItsyBitsy is directly connected to the switch PCA9545A, this switch is connected to 2 retimers to Channel 3 and Channel 0. When I do the I2C scanner sketch, I get 1 I2C device address which is 0x73 because I am writing the pins D9 and D7 high, so when I do a I2C write according to Figure 8 in the Switch datasheet to the address 0x73 I am expecting to read F9 and if I run my I2C scanner sketch I should see 2 more addresses but instead I read all FF and still see only the switch address? I am asserting A0 and A1 of the switch high

This is my function to write and read to the switch

void writeSwitch(byte address,byte channel)
{
 Wire.beginTransmission(address);
 Wire.write(channel);
 Wire.endTransmission();
 
}
 
void readSwitch(byte address)
{
 byte read1;
 byte read2;
 Wire.requestFrom(address, 1); // select number of bytes to get from the device (2 bytes in this case)
 read1= Wire.read(); // read next byte from the following register
 read2=Wire.read();
// Serial.print(switch_address);
 Serial.print("First byte: ");
 Serial.println(read1,HEX);
 
}
#

How do I write the I2C code properly to ensure that I am actually writing to the peripherals? Whenever I do a read after write using the Wire library

viral spade
#

can i use the feather M4 using ardunio programing to work with the LIS3MDL Triple-axis Magnetometer

safe shell
junior crane
#

Or is there a better channel to ask my question?

safe shell
#

this channel is fine, people come and go and it may take some time before someone with ideas about your question responds

eternal cloud
junior crane
#

Great I needed something like this

eternal cloud
#

The multiplexer is not going to assign different I2C addresses to your devices, so you can see them in the scan

#

it just forwards the information to the devices connected to it

fresh pendant
#

How do folks like Arduino IDE 2.0 so far? I'm advising a friend who's just starting, but haven't tried 2.0 myself. Their project is for esp32 if that matters.

pine bramble
wind drift
#

Is there a way to create large scale capacitive touch sensor? What material would I have to use for that? just a piece of aluminum foil? Or some kind of spray paint/coating?

pine bramble
#

Runs on Debian Bullseye amd64. Seems a bit resource hungry when it starts up; even after quitting the arduino-ide, when restarted it seems 'faster' than on a cold start (when stuff gets swapped out to make room for it).
Compilation of an empty Uno sketch subjectively feels 'faster' than the 1.8.19 IDE does.

#

I would guess if /friend/ has a modern PC with 4GB RAM (or more) they'd be fine and should try it just to see which environment they like better.

livid osprey
wind drift
#

thanks!

are there any other alternatives I could use? The surface area I need t ocover is roughly an A4 or A3 sheet of paper in size

#

It just needs to turn on/off an LED

gilded swift
#

Use multiple channels and just read it’s status register which should tell you if any of the channels detect touch.

livid osprey
#

What is the surface reacting to?

#

Is it a finger touch or something else?

#

I know if it’s like a pressure plate designed to be stepped on, people have made momentary switches using foil and cardboard…

eternal cloud
# wind drift Is there a way to create large scale capacitive touch sensor? What material woul...

If you're interested in larger capacitive touch projects, look at people who do work in museums, or art galleries, with large scale installations

There are projects on this site, for example https://www.bareconductive.com/

https://www.bareconductive.com/blogs/resources/electric-paint-sensor-design-rules-of-thumb

They mainly give examples using their conductive paint (which is awesome), but the designs work with other conductive materials too.

native kelp
#

im using this sample arduinoota example, and it has an onEnd function override, i was wondering, should i add some restarting code into the onEnd function so it properly applies the update?

#

from this one

wind drift
#

just finger touch

#

Thanks - I will try it with the conductive paint first

#

Is it possible to spray paint over it? Or will that affect the conductivity?

#

basically want to hide the black paint