microcontrollers

[rapid escarp]

btw if anyone here is in the us the rpi pico is on sale for $1.99

at microcenter

[wraith crag]

Hey folks I am very new to python and i am working on a problem that I need help with. The topic is communication. I am trying to write a python script that will receive data either via tcp/ip socket messaging or via GPIO pins and use that logic to communicate to a device via serial. To start with I wanna use serial straight up but enable bluetooth functionality. I was thinking something on raspberry pi

I will have to deal with 2 different protocols. so I am unsure how that setup looks like and how complicated it would be

[severe warren]

I just got two of these today - really impressed.

[severe warren]

This should be a relatively straight forward thing to do but depends on you programming ability. IMO you would be best getting a good grasp of python basics before venturing into sockets

[turbid patio]

I'm new to all this. How can I use a Python library in MicroPython?

[wraith crag]

any particular place to start?

i have been looking into some youtube videos

Also is there a coding excercise or challenge I could work towards?

[spark robin]

just import them...
not all are available tho, and some have 'u' prefix before them,
http://docs.micropython.org/en/latest/library/index.html#python-standard-libraries-and-micro-libraries
use this link to refer libraries.

[opal furnace]

do all micropython devices use little endian?

[craggy ember]

@opal furnace to my knowledge yes as all of the architectures I know of using MicroPython are little endian.

[opal furnace]

thanks

[craggy ember]

Welcome!

[stuck thicket]

DESK OF LADYADA - It's an RP2040 & Pico Party! https://youtu.be/jIUV9gYLYpk

[white spade]

YES! Though I dont think it's the plugin in my case

If you have any experiences with it to share I'd love to hear

Trying to acomplish Azure IoT integration over LTE myself

[floral mantle]

been working with them for over a year now. feel free to send me a DM or hit me up over at the PyCom forum.

[neat pine]

Anyone with power issues with Micropython over Arudino?

[main ridge]

How to send a float using USART, other way than using sprintf? for atmega32

[craggy ember]

@neat pine I have not seen any.

[wide stream]

oop

[spark robin]

How do I uninstall micropython from esp8266 and reinstall the original firmware to reuse arduino programs...?

I'm using Nodemcu esp8266
the Chip is ESP8266EX
if it is of any more convenience.

[fast elm]

you mean to use it as a modem for an arduino? Or have it being able to run arduino programs?

@spark robin

[craggy ember]

@spark robin the easiest thing would be to download the Arduino IDE https://www.arduino.cc/en/software and then you can simply flash any of the example programs.

[hallow igloo]

Hey There !

Working on building an autonomous UAV

collabs anyone ?

[neat pine]

On what platform?

[spark robin]

This is comming when I do That

@craggy ember

@craggy ember Kevin Thomas

These are my settings

[craggy ember]

@spark robin did you install the esp32 or esp8266 package in Arduino IDE? Here is a great tutorial on how to get the libraries set up. https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/

[kind ice]

Picos were in stock again at Adafruit. They sold out in less than 2 hours but I managed to squeak an order in before they did.

I always get the alerts at the worst times. LOL

They are trickling in, get on the notification list if you want one.

[spark robin]

Yes I did....
And also I have uses esp8266 before on the same system...
before I installed micropython....

[fierce needle]

Hey, I am thinking about RPi Pico - is it ready to develop it in MicroPython?

[kind ice]

Gonna find out soon, got Picos on the way.

[fierce needle]

Yay, nice!

[hardy skiff]

oooooooooo aaaaaaaahhh

[calm folio]

what is micro python?

[violet matrix]

https://micropython.org/ Pretty cool, I'm finally really reading about it now.

[calm folio]

oh ok thx

[shy ember]

Hello
I need to use a flask web server to read data from my sensors and sent it to my MYSQL databse.

1: I noticed that my Flask server only starts without my sensor (code commented), and when I allow my sensor to read data my server doesn't start, how do I do both?

2: How do I sent my sensor data/readings to my MYSQL database?

Thanks

[edgy oxide]

@shy ember your sensor code is in an infinite loop, so the flask code never runs

if your intention is to have the sensor data requestable via an endpoint, then i would add a flask endpoint that calls the .read function and returns its results

[shy ember]

Ah ok, I'll see what I can do, thanks!

[stuck thicket]

WE ARE LIVE! SHOW AND TELL! https://youtu.be/8V6kqSBPj_U

[stuck thicket]

WE ARE LIVE! ASK AN ENGINEER! https://youtu.be/bRtn4PzyE2U

[hallow igloo]

question my dudes

is it worth using python for embedded systems because isn't it more of an Mathematical language like for computational not low level work

I'm basically just saying it worth it at all to try out python on like raspberry pico or learn Low level languages

Ping me

[kind ice]

You know, for such a tiny device, a Trinket M0 has a LOT of the magic smoke in it . . .

[kind ice]

Just ordered a replacement. If I didn't already have the board built I'd just substitute something else, but it's not worth going back to the drawing board now, I'll just replace the Trinket and proceed.

[hybrid kraken]

Hello i'm new to microcontrollers.
does any body know where i can get a microphone that i can put on an Arduino

[errant wigeon]

@hybrid kraken https://www.adafruit.com/product/1063 that should work

adafruit is a great company and has plenty of tutorials to help you use it

@kind ice Oh what are you building? And how did you let out the magic smoke?

@hallow igloo Both MicroPython and CircuitPython have been working on making sure they function with the pico if I recall correctly, and it should be decently easy to get it up and running. It's a new bit of tech though so there'll probably be hiccups, but if you just want to see what you can do with a pico, python would be a good place to start, and if you enjoy the experience and need to squeeze more out of it you could always switch to lower level languages

The pico is a microcontroller though, not embedded linux like a raspberry pi, so if you've never played with arduino's or feathers or the like, it might somewhat of a new experience

[hallow igloo]

@errant wigeon Thanks man can I ask question about embedded systems

[errant wigeon]

of course! I'm not the best but worst comes to worse I can point you in a direction

[hybrid kraken]

thank you

[hallow igloo]

no all good you seem to know things, I'm just confused on the tools to use for embedded system like for example

when learning to build website, application, game, do data science, etc

there's a layout for that a many people show different packages frameworks and tools to use

but for embedded system it's amazing because you can do about anything. But with that comes insane confusion

because if if someones had a lot of experience with arduino feel like it lacks for future projects they will have to learn a whole different language and way to design the system

depending on the microcontroller they want or what specs etc

for me honestly I get really confused on how to actually program different chips

Sorrry for making this so long

🥲

[errant wigeon]

Don't worry, it makes perfect sense!

Ok so I think a good way to think about exploring embedded systems is to think about 'around the house' projects you're interested in. Things you can build and interact with. That's a good starting point. So for example Say you have a coffee pot and you want to text it to turn on, or lights that you want to blink when you get an email.

It's a physical project that interacts with the real world, and it gives you constraints. Those constraints help you pick a microcontroller

If you're a company there's more complex constraints, like volume, total cost per part, cost of added things, etc. That's where most of the diversity in the microcontroller world comes from. As a hobbiest, you probably won't need to worry about that. So when you see all that complexity, know that most of it isn't something you really need to worry about

[hallow igloo]

I see true true, also because I hear that c/c++ is like the go to for embedded systems would every microcontroller or microprocessor work on it to compile data.

[errant wigeon]

yes! And assembly if you're REALLY squeezing pennies or speed or power

[hallow igloo]

ya I wanna learn assembly soon

[errant wigeon]

But that's driven because companies need to save money, or time, or power.

to dip your toes into the water, starting with Circuit Python or microPython is a fine first step

it'll give you experience with interfacing with things like sensors, LEDs, Servos, etc

then you can explore writing C to do the same thing

[hallow igloo]

I wanna use python more even though I've tired arduino, i'd just use python for data science with embedded systems

[hallow igloo]

True because I feel like even though python would lack in some things likes speed. You'd still get that foundation for understanding each components function. Along with the fundamentals of how to program the devices.

[errant wigeon]

yeah. There's a lot that you won't get much experience with using micro or circuit python (To my knowledge--I've only played with circuit python thus far, I need to expand to micropython soon to see what that environment is like), but it's a great place to start, and then you can explore a lot of the more nuanced things afterwards.

For me I use it because I have more fun writing python than I do writing C, and I hate debugging C way more than python. Most of my around the house projects don't need to squeeze every penny, so I choose circuit python because I can quickly and enjoyably spin up a little toy without much frustration.

If I hit a wall I can swap to c, but byinlarge I don't need to, and the Pico makes it even cheaper to buy a fairly large microcontroller

But if you don't have a project to build, the pico (and other micorcontrollers) might not be enjoyable.

They're devices to run 'specific task' programs, and can't run a ton at once as easily as a raspberry pi would.

In all, I think circuit python or micro python are good choices to begin learning about embedded systems, and the pico is both cheap and designed with learning in mind. The embedded implementations of python have their limit, but if you're just looking to learn about the embedded world, I'd recommend starting here

[craggy ember]

Really well said @errant wigeon I would also say that micro:bit is a great way to learn MicroPython for new folks.

[errant wigeon]

Oh I didn't know about that! Thanks! I'm going to go through that later on myself 😄

[craggy ember]

@errant wigeon I have a tutorial for the micro:bit if you are interested. https://github.com/mytechnotalent/MicroPython-For-micro-bit

[errant wigeon]

Thank you! This will be great to go through!

[craggy ember]

Pleasure!

[velvet wedge]

How do I fix unused variable guild

[still dome]

@craggy ember how does micropython compare with coding in C for an ESP or microbit controller?

[craggy ember]

@still dome The difference is literally breathtaking. The xtensa C is so much more complicated than the MicroPython for the ESP-32 that is is worlds apart. Now, when taking about the micro:bit we are referring to the codal (version 2) can dal (version 1) both very powerful but the MicroPython implementations are significantly more powerful when it comes to code development ease and scalability.

C is the parent of CPython and is to hold the deepest respect but unless you are developing real-time sensitive code, MicroPython is the better solution period.

[still dome]

@craggy ember thanks for your answer! what about power consumption/ram is it affected at all by micropython?

[mint kite]

new pi controller 😮

they missed their chance to call it the "pi slice"

that wouldve been sick

[craggy ember]

@still dome It depends. There is a low power mode that you can read on here. I would say if you can use interrupts rather than a larger series of loops that would help as well with power. https://docs.micropython.org/en/latest/esp8266/tutorial/powerctrl.html

[kind ice]

A perfect storm of fatigue, impatience and small blunders swirled together. Long story short, I inadvertently connected a power supply that I thought had been switched back to 5V but was instead still set on 12V.

Not sure what the maximum voltage tolerance of the Trinket M0 is, but I'm satisfied it is not in fact 12V.

[errant wigeon]

ahh I know that storm and the smell of the magic blue smoke that follows it well

bummer it happened, but hopefully the replacement gets there quickly and wasn't too expensive

[kind ice]

The device will activate a set of solenoids in a repeating pattern. The solenoids run on 12V, hence the relays.

[errant wigeon]

ah very nice

I fried a few controllers from not properly isolating a solenoid's flyback some years ago, I like the relay choice in your build

[spice lagoon]

hey, what is the best type of raspberry pi to use for computer vision projects?
any recommendations?

[rough harbor]

Wooooo I got a pico

[rigid pecan]

Is this the place to ask about raspberry pies?

[rigid pecan]

What are you using it for?

The pico is for controlling hardware right? Like lights

[rigid pecan]

im trying to simply run/host a discord bot on a pi zero W, should i go javascript, python or C# or another language? which is the best language to setup/use on raspberry pi's?

[sudden hamlet]

Python is a good option

[rough harbor]

@rigid pecan the only idea so far was some bread board office temp measuring/recording. I’m curious if I can use it to program eeproms though 🤔

[rigid pecan]

The Pico's are for hardware programming right?

You can't let's say host a discord bot them

[rough harbor]

followed the steps for the Pico SDK micropython build and got things going fine

hmm i did not anticipate how i'd expect the data

[hallow igloo]

hey guys! one simple question. I just got an Arduino Uno, and i have an ESP8226 with me. I couldn't find any tutorials about it at all (on youtube). How do you guys search for the documentation and such for libraries? Also, can you code in microcontrollers using python and if so, is everything supported, or is it just specific libraries?

[rigid pecan]

I got a pi zero W but I don’t have a Bluetooth mouse/keyboard. Is there anything I can do or do I need to invest in one

[ornate bear]

usb to microusb adaptor

Plus a usb hub

[rigid pecan]

Ah that’s smart

[rough harbor]

Or enable ssh and just connect it to wifi then ssh in

Treat it like a headless server

[rigid pecan]

Is micro python like normal python? Aka: can you use it with modules such as sockets and discord.py

Cause if i can, it’s the cheaper option for hosting a discord bot

[rough harbor]

Someone far smarter than I would know but my gut instinct says no

I think discord.py would fill the memory on the pico alone

[wheat loom]

Micropython doesn't exactly follow the Python implementation, so you can't really expect libraries as complicated as d.py to work flawlessly

And the stdlib isn't the exact same

[frank hinge]

So
I was trying to make MU work with my Micro:bit v2
But it gives me an error because it isn't on MicroPython V2
How do I put the v2 beta in Mu Code Editor?

[frank hinge]

I need help because

Mu isn't working as inteded

it isn't getting the embeded micropython version

[steel sable]

so not really a microcontroller -- but are there languages for the RPi as good as Python?

I'll take that one step further - are there any compiled languages that are good to use on the RPi? (for gui design specifically)

[hollow crescent]

guys
i have disassembled a headphone and i want to connect its PCB to my raspberry pi
to play with it a bit
but how can i do it
what are the requirements

[daring raven]

Hi, I am running a MicroPython script which is throwing a NameError inside of a thread, and I am not sure if I need to do something special to define this name inside of the thread.

Unhandled exception in thread started by <function button_reader_thread at 0x20006ad0>
Traceback (most recent call last):
File "<stdin>", line 17, in button_reader_thread
NameError: name 'button' isn't defined

led_red = machine.Pin(15, machine.Pin.OUT)
led_yellow = machine.Pin(14, machine.Pin.OUT)
led_green = machine.Pin(13, machine.Pin.OUT)
button = machine.Pin(16, machine.Pin.IN)
buzzer = machine.Pin(12, machine.Pin.OUT)

global button_pressed
button_pressed = False

def button_reader_thread():
global button_pressed
while True:
if button.value() == 1:
button_pressed = True

_thread.start_new_thread(button_reader_thread, ())

I've omitted some stuff before and after this section of code--I think this captures the problematic secion

I bolded the line that throws the NameError

[steel sable]

my guess is that button isn't defined

[daring raven]

You can see it defined above

[steel sable]

where?

[daring raven]

i just bolded it

[steel sable]

that's not defining button

that's trying to get the value from a button that should already be defined

you need a "button = ..." somewhere or similar

[daring raven]

I'm lost

it is defined

button = machine.Pin(16, machine.Pin.IN)

just a few lines above

[steel sable]

print button afterward, is it "None" type?

[daring raven]

No

it prints

Pin(16, mode=IN)

[steel sable]

oh I just realized it's in a separate thread

[daring raven]

yeah

[steel sable]

are you giving the thread access to that variable?

[daring raven]

I guess not!

this is my first threading attempt with the Pico/MicroPython

[steel sable]

yeah no worries

make sure you make it thread safe as well - although I assume since it's a button it's basically read-only

[daring raven]

Well that value needs to be available to the main program, too

This is literally the tutorial from the Pico book lol

So as far as I'm concerned, the book is wrong

[steel sable]

are you sure they aren't making the button global?

[daring raven]

They do not make button global, no

[steel sable]

seems odd to me that they would put this in there then - do they continue the example later?

[daring raven]

No, this is the culmination of the tutorial

And the behavior is not consistent, either

So I can get the program to run OK but then the first time I press the button, it throws the namerror

I tried rewiring the button, I replaced the button with a different button, I think the hardware is OK

[kind ice]

Also, all my Zeros and Zero Ws are set up as USB gadgets. Easy to do, and gives me the option of SSH without wifi signal.

[steel sable]

no I assume it's a program error, not a hardware error

[daring raven]

Yeah, I agree

[steel sable]

what happens if you make button global?

because... they do that for button_pressed

[daring raven]

tried that, too

Traceback (most recent call last):
File "<stdin>", line 8
SyntaxError: invalid syntax

putting global before the button line errors immediately with that traceback when the program is run

[steel sable]

do you do this? py global button button = ...

[daring raven]

just tried that, back to the nameerror

[steel sable]

did you try putting the global in both the thread and the base code

like they do with button_pressed?

the same way as what I just posted

[daring raven]

Ah good idea, one sec

Interesting, so that resolves the namerror

[steel sable]

well that's a good start

[daring raven]

I think... it works now

ah sh*t now its acting up again

i need to add some print statements

im getting phantom presses

[steel sable]

that could be button debouncing too

[daring raven]

oh

[steel sable]

well, button bouncing

you need to add debouncing to be safe

[daring raven]

can you point me in the right direction on that?

[steel sable]

you can kind of fudge a debouncer with a slight stall/delay

in other words don't read the button for like, 10ms after it's pressed, or whatever

[daring raven]

the mp docs say to build it into a function

def wait_pin_change(pin):
# wait for pin to change value
# it needs to be stable for a continuous 20ms
cur_value = pin.value()
active = 0
while active < 20:
if pin.value() != cur_value:
active += 1
else:
active = 0
pyb.delay(1)

[steel sable]

yeah that works too

its setting a bounce value of 20, saying if it reads a button bouncing more than 20 times, it will activate another press, but you have to be careful how you implement this

you'll figure it out, I'm sure

if you didn't know, this is basically what bouncing is, in terms of the current flow

the button is a real thing, so it won't give you a perfect graph/square wave

[daring raven]

This button is super unreliable lol

it is triggering randomly

ahh

Thanks @steel sable

You have been more helpful than the Pico's documentation

[steel sable]

no problem

if you want a way to remember the global thing, just remember that you have to define it as a global inside of another function/thread because you "could" have another variable "a" that is a local variable - and assumes you mean that until you specify you want the global one

good luck with the rest of it 🙂

[daring raven]

the book explicitly said you only needed to do that if you were changing the variable

[steel sable]

the book is dumb

[daring raven]

Quote from the tutorial: “You’ll see you didn’t need the line global button_pressed to check the status of the variable in the conditional; it’s only needed when you want to change the variable and have that change affect other parts of your program.”

[steel sable]

¯_(ツ)_/¯

[daring raven]

So that advice is apparently not true

[steel sable]

yeah you could have "passed in" another variable called button

and then it wouldn't know which one you were talking about

[daring raven]

which I get

not a great intro to micropython though 🙄

[steel sable]

ha, well best of luck with the rest of it

you have this discord to help you

[daring raven]

@steel sable I found a thread on the RPi forums about the floating button issue with that tutorial in the book, for which they’ve already released an updated PDF version, but my other NameError issue hasn’t been acknowledged yet. I feel bad for any kids with the paper copy of the first edition of that book

Turns out the pull down resistor isn’t on by default, you have to add another argument when setting up the button to specify it to be pull down, and then the button works great

[stuck thicket]

DESK OF LADYADA - Stemma Sunday returns... with a CO2 monitor and TCA8418 Keyboard Breakout https://youtu.be/VpVMo1Qf-GA

[white spade]

Anyone have experience with mqtt on esp32? (pycom)

Please dm me 👀

[craggy ember]

@white spade https://github.com/mytechnotalent/MicroPython-IoT-RFID-Reader

@white spade https://github.com/mytechnotalent/MicroPython-IoT-Thermometer

[white spade]

async?

[dusty geode]

hello guys

[craggy ember]

hi

[mellow moss]

Hi everyone. I m new and i just started coding python. Can someone tell me or give some tips where i should start and the direction i should go?

[errant nexus]

!topic

[hasty zealot]

Off-topic channels

There are three off-topic channels:
• #ot0-psvm’s-eternal-disapproval
• #ot1-perplexing-regexing
• #ot2-never-nester’s-nightmare

Their names change randomly every 24 hours, but you can always find them under the OFF-TOPIC/GENERAL category in the channel list.

[bright elk]

I've been looking into using micropython for an upcoming project I have planned, but I'm seeing Circuit Python showing up in the pinned messages almost exclusively. Would folks recommend opting for CircutPython over MicroPython?

[rough harbor]

both would serve you well honestly

https://www.youtube.com/watch?v=wyOcb2MHzIs&feature=emb_title

[rigid pecan]

is that guy designing a SBC

[violet valve]

@bright elk It depends entirely on what you want to do. There are things MicroPython does that we have not implemented in CircuitPython, however, there is almost always another way to do it in CircuitPython. CircuitPython is easier to use in a lot of ways, but there are also a lot of similarities. What is the project?

[hallow igloo]

I'm new to microelectronics. Any advice on how to get started ?

[rigid pecan]

can you run multiple threads on a single CORE?

[half wraith]

if i upload micropython code to a board, does the board need to be connected to a pc so the code can be interpreted, or does it get translated to machine-like code, im a bit confused

@ me

[sudden hamlet]

@half wraith micropython runs exclusively on the board

you could put the board on a mountain then run away giggling and it will still work

as long as it has power

your python program is compiled to bytecode (not quite machine code) which is interpreted in real-time by the pyboard

[near stone]

Do any of you know of some data acquisition hardware can have data read in by python

Preferably with 16 channels

[sudden hamlet]

no idea if they're any good but picoscope have lots of loggers and i believe there are python wrappers for their sdk

[near stone]

Ok thank you 🙂

[bright elk]

Thanks for the reply! I'm looking to use something like a MIDI file to generate output from a STM32 microcontroller.

[violet valve]

@bright elk Ooh, outside my wheelhouse. But, I think CircuitPython could handle it, however, I believe our STM32 support is limited. So, that might answer your question - if your microcontroller isn't supported in CircuitPython, then obviously you wouldn't be able to go that route. Here are the boards we support: https://circuitpython.org/downloads?q=stm32

I guess it's not as limited as I thought!

[bright elk]

I saw the STM32 was in the list for both CircuitPython and MicroPython. But I'll have a look at the link you've shared, thanks!

[violet valve]

You're welcome!

[stuck thicket]

ASK AN ENGINEER 2/3/2021 LIVE! https://youtu.be/YXPaL3dlmqc

[jagged carbon]

I working some project using relay with raspberry pi. The relay is running on 5v and when I use multimeter, the IN pin (The data pin) is at 5V. Do I need logic level shifter for this or not? Thank you

[sudden hamlet]

are you asking what you need to switch a relay using a raspberry pi?

[bright elk]

I've run into an issue while trying to build CircuitPython. When I try to build I'm getting an Index Error. I am following the adafruit guide for this so I'm not sure what's going wrong. If anyone could provide some insight, I would appreciate it.

[gentle vapor]

you'll have better chances on the adafruit discord

(not from me, I've barely touched the subject but there's a bunch of people)

[bright elk]

Right on, I'll stop by there and see if they can help.

[sinful sparrow]

when I tired to install python from source, yesterday(it didn't install the modules I needed)

Python build finished successfully!
The necessary bits to build these optional modules were not found:
_bz2                  _curses               _curses_panel      
_dbm                  _gdbm                 _hashlib           
_lzma                 _sqlite3              _ssl               
_tkinter              _uuid                 readline           
To find the necessary bits, look in setup.py in detect_modules() for the module's name.


The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc                  atexit                pwd                
time                                                           


Failed to build these modules:
_ctypes                                                        


Could not build the ssl module!
Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().
LibreSSL 2.6.4 and earlier do not provide the necessary APIs, https://github.com/libressl-portable/portable/issues/381```

mainly these

I also installed over the default python3

[sinful sparrow]

does anyone have an update to date guide for it?

[rapid marsh]

Hello! Not sure if this is the right channel to ask this question so just let me know if i should ask in a different channel...

Anyways, I am about to start a project that i need a microcontroller for. It will mostly involve programming LED strip lights along with analyzing and processing audio data. I was wondering how one determines what microcontroller that one will need as far as processing power and memory goes. I am thinking about getting the d-series pyboard as it seems to have all the peripherals i'll need. But I have know way to know if it has the processing power or memory capable of doing what I need it to do. Any insight would be greatly appreciated!

[gentle vapor]

I think that board is quite capable enough for your project, but what I would do if I were you, is look for similar projects online, see what they use and if they document any difficulty with it.

[rapid marsh]

Awesome! Thanks. I am trying to find a project similar to mine

[gentle vapor]

that pyboard is an M7, that might even be overpowered depending on what processing you want to do. A samd21 with a microphone can manage a VU-meter with a neopixel strip. And that's an M0.

not that there's anything wrong with overpowered though 😉

[rapid marsh]

That's fair ha. I am basically going to have an audio input of very simple music (single notes at a time) and have them processed and analyzed so that they be translated/mapped onto the LED strip I am using. i.e. certain notes will correspond to certain LEDs. There will be some additional things i will add on down the line but that's the first thing i need to get working.

[gentle vapor]

oh yeah that's way more complicated

[rapid marsh]

Do you think the d-series board i mentioned earlier would be capable of that and maybe a little more?

[gentle vapor]

my experience with sound processing is very limited

anyway, that seems like a fun project 👍

[cedar granite]

Hello,
I'm trying to figure out the best way to measure the time taken to send 2kB of data through UDP socket:
I've got 2 esp8266 Boards with microPython.
Those 2 boards are connected to a common hotspot and send data to one another. I need to see how fast i can send 2kB of data relatively reliably.
At the moment, i've tried to test it with a python program running on my computer, reading from 2 serial ports (one for each ESP) , one of the ESP sends a random byte when it starts sending the 2k, That byte received on the computer starts the time in the python program. When the other ESP receives it, it also sends a random byte to tell the computer program to end the time.
Here's the prog on the computer

    times = []
    with serial.Serial('COM17', 115200) as serverCOM: #server
        with serial.Serial('COM9', 115200) as clientCOM: #client
            for x in range(NBR_MESURE): 
                while True:
                    val = clientCOM.read().decode()
                    if  val == 'k':
                        break
                start = time.perf_counter()

                while True:
                    val = serverCOM.read().decode()
                    if val == ".":
                        break    
                end = time.perf_counter()       

                print(f"{x} - {end - start} Seconds elapsed")
                times.append(end - start)

And I'm not really sure its the best way to do it. Any ideas? or suggestions
Thx

[wheat loom]

Which ones do you need? It is usually failing because you are missing shared libraries. For example, you need libcurses in order to build _curses

[kind ice]

Well I learned an interesting fact. Read a tutorial where it espoused renaming CIRCUITPY directory on CircuitPython devices connected to windows. So I did and it worked like a charm, with different windows easily distinguished from each other. Until I started Mu, which gave me the finger. It can't find the device if it's not the default name of CIRCUITPY.

You have to click 'open' and find code.py on the device yourself. Which is not a big deal but it kinda cuts negates the advantage of individual device names a bit. Just thought I'd share in case anyone else decides to try this. I think I'm going to go back to the default names.

[gentle vapor]

I almost always rename my CIRCUITPY devices, but I don't use Mu, I just open the files from the board with my default python editor

[gritty crow]

Anybody here? I need help

Please @ me if you see me

[sudden hamlet]

@gritty crow

!ask

dangit

!ask

[stuck thicket]

DESK OF LADYADA - Another Snowy Sunday - A revision-full weekend! https://youtu.be/78x0Tvbjfgc

[sinful sparrow]

uh, can give me the command for all the shared libaries? so I am good? and can compile it, if you have a list, can you DM me it?

if so thank you

[wheat loom]

Hmm I’ll try to see if there’s a list somewhere, but I doubt it

[sinful sparrow]

do you have a list?

[wheat loom]

What OS are you on?

[sinful sparrow]

that was for rasberry pi

I am on windows right now talking

but the rasberry pi is where I was installing the python

[wheat loom]

Alright, on the rpi you can do apt build-dep python3.7

[sinful sparrow]

I mainly want python3.8 or up

[wheat loom]

For installing the build dep it will be the same, but 3.8 might not be in the repository

[sinful sparrow]

python compatitbly

[sinful sparrow]

I tried installing from the python source

for python3.9

[wheat loom]

Yes, just run that command

and then rebuild

[sinful sparrow]

oh ok

thanks

[sinful sparrow]

uh

Reading package lists... Done
E: You must put some 'source' URIs in your sources.list

[wheat loom]

Ah, you need to configure your apt sources then

[sinful sparrow]

.___.

how?

[wheat loom]

See https://www.raspbian.org/RaspbianRepository

[sinful sparrow]

I did wget

but uh

deb doesn't work lol

deb http://archive.raspbian.org/raspbian wheezy main contrib non-free
deb-src http://archive.raspbian.org/raspbian wheezy main contrib non-free```

[wheat loom]

That should be good now

[sinful sparrow]

ok

oh come on

Reading package lists... Done
E: You must put some 'source' URIs in your sources.list

[sinful sparrow]

ugh...

[sinful sparrow]

@wheat loom welp..

[zealous fox]

I am new to micro-python and ised C/C++ in the past. For my personal project I like to use python, but concerned about speed and other factors. Hope for hobby project micro-python is sufficient

[craggy ember]

@zealous fox I would be surprised if you had issues with the speed of MicroPython if you are using non-realtime situations. What does your personal project contain?

[clever tiger]

In case this is of interest:
this is a contest in getting access to an industrial microcontroller
for the best idea and know-how for preventing injuries in factories: https://makeprojects.com/yokogawa-contest?utm_source=make_newsletter_community_link&utm_medium=mc&utm_campaign=community&utm_content=link&vgo_ee=9ox6KSCYY2hpTZyiX2uxc%2FlMy%2BOWWuyaZunZiCXh6gI%3D

[sudden hamlet]

us and mexico only

[sinful sparrow]

hmm

[jolly thicket]

Hey all

Can anyone suggest me good book to study microcontroller?

[jade orchid]

Does anybody know a micropython compatible dev board with lot's of GPIO ? I only played with wemos mini so far, but need way more IO...

[wheat loom]

You can use a multiplexer interface

[pulsar thistle]

Hello guys, do you know any good tutorial for autopilot and object detection?

[jade orchid]

@wheat loom Yeah, after some digging I guess that's the best solution. The most IO I found is the Adafruit Grand Central M4 Express but it seems waaaay overkill...

[karmic ice]

Would anyone who is familiar with interacting with bluetooth LE services through Python (any library) be willing to help me?

I have my service UUIDs ID's but not surue how to read from them

[hallow igloo]

is ye language actuall good for microcontrollers

[twin roost]

@hallow igloo "ye"?

[hallow igloo]

The

[errant wigeon]

@hallow igloo it depends on what you're after. If you need something to just work it's pretty good. If you want an introduction to microcontrollers, and peripherals that are fairly common, it's also a good starting point. If you need time sensitive code execution, it's not always as ideal. To be fair though, I'd encourage programmers start with micro python or circuit python over arduino if they're familiar with python, and not familiar with embedded electronics. There's a wealth of reasons to not use micro or circuit python--but if you're up against those reasons, you probably already understand the pros and cons. And if you don't, it's a gentle way to start programming low level peripherals

[stuck thicket]

Smorgasboard Sunday at Ladyada's desk - Stemma, RP2040, mailbag and more! https://youtu.be/LHpxr_BgBhU

[viscid jolt]

whats a good microcontroller for beginners

[hallow igloo]

Depends on what you want to do

[versed mountain]

anyone can help me .... where to start embedded programming

[craggy ember]

@versed mountain What would you like to do with embedded programming? I would think about CircuitPython as there are a ton of great options for you.

https://learn.adafruit.com/welcome-to-circuitpython

[opal furnace]

How can I get the current time with an ESP32 running micropython?

I have tried machine.RTC() and utime.gmtime, but both are about 21 years behind.

[hallow igloo]

I can’t even get the module to work

after 2 days it works

[white spade]

You need to sync the RTC

Should be RTC.sync_ntp or something like that

Check the docs

[opal furnace]

thanks!

[tacit oracle]

Hey there I use esp8266 with uPycraft I was able to connect to port3, without problem and since now I get open serial error, please try again.
though, I found why, it's because it open a WiFi connection but I have no idea how it does it.. so anyone have an idea how to settle this problem please?

[fossil verge]

Noob here with firmware concepts. I have a couple Espressif ESP32's w/o Circuit/MicroPython. When Circuit/MicroPython is flashed onto one of these, is that any different than how "code" from the Arduino IDE is laid down to flash? Or does installing *Py erase/overwrite "more"? Please @ mention me when replying. Thx!

[craggy ember]

@fossil verge when you flash CP or MP onto the device it removes the file system so it would remove any Arduino C++ libs or code.

[fossil verge]

👍

[craggy ember]

Welcome to the world of MP & CP! There are amazing things here for you!

[fossil verge]

@craggy ember Thanks. I guess that flash process (either way) always removes any partitioning/SPIFFS/etc too?

[craggy ember]

Yes so the .bin is going to be the OS in essence. It will wipe a reliant file system.

[fossil verge]

Noob question too... What does MP/CP run "on top of"? Is it different for each MCU?

[craggy ember]

If you are moving one MP version to another (.bin) it can leave it in tact in certain circumstances due to where it write to the flash does that make sense?

[fossil verge]

For example, for Espressif MCUs does it run on top of FreeRTOS?

[craggy ember]

The beauty of MP/CP is the core runs on all ports (in MP look for the ports folder, CP look for the ports folder).

I can't say enough about MP/CP I just simply can't.

This flexibility gives development opportunities a new level of possibility.

[fossil verge]

I'm just curious about all the layers involved. 😹

[craggy ember]

MP firmware is going to compile down to a ARM32 or Tenslica32 (etc..) binary.

If you freeze the Python files it will put the MP bytecode in the binary.

Currently there is no disassembler for MP so you will have to use bc0.h to find the Bytecode Assembly info.

It is C that builds the MP VM.

[fossil verge]

🥴 👍 😄

[gentle vapor]

yes, at least for Circuitpython it runs as a task in the ESP-IDF FreeRTOS, which will be handling the low level networking too, but that is completely invisible from python, but on the others it's on its own, though I'm not sure about the nrf52

[stuck thicket]

WE ARE LIVE! SHOW AND TELL! https://youtu.be/tRBJzmZZHwU

[pseudo wren]

hello

how do I read gyroscope data from a mpu6050 through a esp32 with micropython?

[fossil verge]

(noob to MP/CP) What's some good methods to remotely debug running code? (both LAN & WAN) If this is challenging, what about an environment to just do remote logging such as a remote serial monitor? Please @mention or "reply". Thx!

[bleak grotto]

Came a few days ago!

[gentle vapor]

micropython has the webrepl on ESP32... that's all I can think of

[left fable]

Oh rasbwryy 😄

[cobalt hazel]

rasberry pi

[hallow igloo]

hello everyone

i need some help

related to python in raspberry pi 4

[fickle kettle]

ooh a pico

nice

[fickle kettle]

how so?

[pliant grotto]

does anyone know if you can run python on an arduino

[light grove]

maybe there is someway but tbh its doesn't seem hard to learn arduino

[lilac ruin]

Arduinos aren't exactly powerful enough to pull it off properly, lacking speed and memory. You'll have to write in C or assembly on those.

[hallow igloo]

raspberry pi
for some reason I can't access my Pi server thing on my browser and I am connected to the same home network as it, I am newish to this and don't really understand what the problem is, I typed my pi's ip in correctly to my browser and it couldn't connect
can someone please help me
ping me🏓

[gentle vapor]

AVR Arduinos can't run python, but some models like the Arduino Zero are supported. There are many other boards that run micropython or circuitpython pretty well though. The upcoming rp2040 based Arduino board certainly will too.

[humble kraken]

@pliant grotto you can run it on most esp32 boards, or an RPi Pico

[stuck thicket]

Sample Sunday & Mega Mailbag on the Desk of Ladyada https://youtu.be/y923x_FRSM4

[lone heron]

anyone one here uses Pyfirmatta and Arduino Uno

[gloomy flint]

i also like to know about it

i am really messing with c in arduino uno

[unborn monolith]

Does anyone know a good temperature sensor for raspberry pi ? I currently have a dht11 and it's pretty inconsistent with it's readings ,i tried to make it read 10 values and average them but still sometimes it will read stuff like 7.8 when it's around 22.0 and it brings my average way lower than it should

[feral jacinth]

I do.

the module is pretty simple.

[hallow igloo]

hi

[lone heron]

could you send me tutorial on how to use it

[lucid rain]

yeey

yeye

[steep dune]

any one try a raspi pico yet ?

[raw veldt]

Hello...I'm trying to learn Raspberry Pi for the the first time. I can't get my LED to light up and I'm trying to narrow down what it could be. Can I use Thonny to get access to the GPIO pins, or is it just the Terminal that has access to it?

[valid quest]

Nice

Might I ask, what is Rasberry PI used for?

[echo shore]

Raspberry pi is a Micro Controller That Allows U To Control Real Life Things with Python code

[valid quest]

Ok

[lilac lark]

ordered a breadbox and wire kit wish me luck

[restive fjord]

ordered a breadbox too, think it was labelled like whole wheat or something? not sure

[lilac lark]

it's sourdough

[weak basin]

Is there some convenient library for defining binary message schemas?

I need to talk to a bunch of devices over USB, and I don't want to manually encode/decode each message

Is this https://kaitai.io/ something worth looking into?

[sudden hamlet]

protobuf, or struct.pack/unpack if you haven't already found them

[weak basin]

I think I'll go with struct, or maybe I'll make a small utility

[fickle kettle]

Is it possible to code an arduino nano with Python rather than C?

[gentle vapor]

that's an atmega328, Micropython can't run on those

and there are no other way that I know of to program them in python

[fickle kettle]

ok, thank you!

[gloomy oxide]

I'm trying to run a game I made in Python on a Raspberry Pi using Raspbian.
However, I'm getting import errors for various modules I need, sometimes installing pygame fails, sometimes it's librosa or other dependencies. I developed the game on Windows using a standard PyCharm project, which has a venv folder and a data folder (the latter you can see in the screenshot below)
I've struggled for weeks and tried everything I could, even creating a virtual environment from scratch and running the game on my Ubuntu system - which worked but doesn't really help me, copying the entire thing over to Raspbian didn't work either. Does anyone know how I can get my program to run - as a .py file or otherwise?

[hallow igloo]

what are the import errors?

[gloomy oxide]

I don't have the RPi since it's a group project, but it seems to be errors inside the modules I'm importing

Syntax errors for example

Which really confuses me since there's nothing I can do about that

[hallow igloo]

you could edit the module files installed on your computer but thats a pain in the ass

[gloomy oxide]

I'm coding on Windows but it has to run on some sort of distro that RPi supports

So I was planning to just copy the data over into a venv on the Pi

But obviously that doesn't help me if I can't install modules

If there's a way I can combine my entire project including dependencies into some sort of executable that would be perfect too

[full sable]

can someone help with pyaudio?

https://dpaste.org/C4zj#L

[lone heron]

Does anyone have a good recommendation for an Arduino uno starter kit (DM me the recommendation)

[hallow igloo]

If you are coding on windows then running on linux one big difference is the way linux and windows handle directories

since windows uses \ instead of /

Could be that the dependency is getting a file location in the wrong format

There is a module that can help fix this, but I forget what its called

os.path i think

but that might not be the problem

we'd need to see the error message

As far as executables there is this

https://realpython.com/pyinstaller-python/

[gloomy oxide]

@hallow igloo Thank you for your response! I've created the entire project and venv again on Ubuntu and only copied the actual .py files and assets (images, sounds, etc.) As I explained above, this works fine and I can run my code without problems. However, when I copy this project over to the Pi (running Raspbian) I get import errors. I'll test some more things when I get access to the Pi again.

[hallow igloo]

If you can show those errors I can probably help

The dependencies might be different/just not work on raspberry os

[mystic jetty]

my raspberry pi zero w camera port cover thingy broke

is there a way i can buy a new one

because ive tried looking but no luck

[brisk trout]

any beginner tutorial list i can start with for this python microcontroller tutorial?

[halcyon vine]

can two devices with software i2c and hardware i2c communicate or are they incompatible?

and can two different devices (esp32 and arduino nano) communicate over hardware i2c or software i2c only?

[pulsar thistle]

if python microcontroller, i prefer read books first

or read on website

[feral jacinth]

Buy a 3d printer

[mystic jetty]

i have one

i tried to make a cover but uh

im not the best at modeling properly

it didnt fit

[sudden hamlet]

you can't copy and paste your venv from one operating system to another

you should keep a requirements.txt for the project, and a separate venv on each computer

[feral jacinth]

Then find and download a source model.

I guess you know where to search.

[mystic jetty]

thingiverse

but ive tried looking

[feral jacinth]

Bruh

@mystic jetty https://grabcad.com/library/raspberry-pi-camera-module-v2-1 maybe this helps.

[stuck thicket]

Desk of Ladyada - RP2040 Feather prepares to take flight! https://youtu.be/qkN2TXqj59M

[brisk trout]

Thanks, any recommendation for the website and books?

[pulsar thistle]

well actually there are a lot of stuff, but I read arduino for dummies and if the python, I am still studying about pid in someone project 😅

[hallow igloo]

Just google exactly what you want to do.

I think I am halfway decent with microelectronics and that's still what I do.

[fossil verge]

When connect to https websites on ESP32, does the RTC/clock need to by synced (like via NTP) before doing any https/SSL web requests?

[feral jacinth]

@brisk trout you may also read documentation/s of the library/ies you use.

[pure osprey]

anyone know how I would write a GUI for a rotary encoder on a OLED display? Something about the multi-page logic eludes me.

Im on micropython

[hasty zealot]

Resources

The Resources page on our website contains a list of hand-selected learning resources that we regularly recommend to both beginners and experts.

https://pythondiscord.com/pages/resources

[sudden hamlet]

What specifically are you struggling with

[pure osprey]

I dont know how to code a rotary encoder to change items on screen without locking up the controller, and I wanted to make a menu for the OLED screen

see this for the layout:

[sudden hamlet]

so navigating a multi-page menu with a rotary encoder?

so up/down/click controls

[pure osprey]

The upper right is a menu that pops up when you click the encoder and it has left/right controls. Previous screen, action on current screen, next screen.

[sudden hamlet]

yoop

so you need two main things

firstly a way of keeping track which menu you're in and what its state is

and secondly a way of drawing whatever menu you're in with its state every time something changes (when the screen needs to be updated)

[pure osprey]

thats the main Idea for the interface

[pure osprey]

OK

would class systems work? Or am I thinking of the wrong thing?

also, Could I do the interface with three buttons (left, right, enter)?

[sudden hamlet]

well you need more of a framework than 'using classes' 😄

but yeah you could use classes as part of it i guess

[pure osprey]

if I cant fit a rotary encoder

[sudden hamlet]

well it's the same inputs i guess

[pure osprey]

true

[sudden hamlet]

just depends on whether you're happy with it for the user

[pure osprey]

Im the user

[sudden hamlet]

and for testing definitely

[pure osprey]

so yeah

[sudden hamlet]

be happy :)

[pure osprey]

yup

So what kind of code would work best for this idea?

I got the whole keeping track, and drawing the screen part.

What kind of framework are we talking about?

This is the OLED module I'm using: https://github.com/peterhinch/micropython-nano-gui

[sudden hamlet]

so the application of classes would be that

you need to turn the up/down/enter input into something that goes up/down/selects the option

so you could have a separate bit of code for every single menu that handles that

but i think a better idea would be to make subclasses for each menu of a base class, which handles the selector going up/down or pressing enter

[pure osprey]

ok...

[sudden hamlet]

but you could do it without that for a few menus without it being a problem

don't worry if that seems a bit overwhelming or complex

i would probably just do it the simpler way unless i had tons of menus

[pure osprey]

true

I kinda wanted to see if I could make it sortof app-based, where there is an underlying framework, then each page just pluggs into it. Is that too much for an esp32?

[sudden hamlet]

hmm not sure

but that was my thinking with the class system

that it could be extremely extensible

and you wouldn't have to hard-code everything

[pure osprey]

exaclty. I don't want to relearn it every time I decide to add to it.

cause I will not remember what hard coded stuff I need to do like 3 months from when I write it

I guess my main question now is how do interrupts in code work?

Most of the stuff I've coded is very linear

[sudden hamlet]

ah

i don't think they'll really be interrupts in python, more like callbacks

although it's a similar idea

interrupts are more for machine code running on the cpu

so

let me take a look at the micropython docs so i can see the specific uses

oh they do call them interrupts

could you show me the documentation you're using

[pure osprey]

for micropython?

or for the board?

[sudden hamlet]

well both

[pure osprey]

https://docs.micropython.org/en/latest/esp32/quickref.html

[sudden hamlet]

the micropython documentation for the board you'r[e using

ah yeah i couldn't see anything about interrupts there

[pure osprey]

everything under the ESP32 section

[sudden hamlet]

seems like only the pyboard has interrupts

from the documentation

[pure osprey]

https://randomnerdtutorials.com/micropython-interrupts-esp32-esp8266/

So I would write a funtion that calls he menu class when the encoder button is pressed?

and when it rotates the menu would change?

and then Im guessing after a delay it goes back to the screen I was on without the menu

[sudden hamlet]

well if you want

or you have a 'back' option in every submenu

that would be another advantage of the structured system

the class says what menu options it has and gets a function called when each of them is selected

[pure osprey]

true

that would work

hmm

the screen ID then woud be called according to the screen layout, and then it could keep track of where it is and move accordingly

maybe a tiered list or dictionary system?

to keep track of the screens and their function names?

[hasty zealot]

Hey @pure osprey!

It looks like you tried to attach a Python file - please use a code-pasting service such as https://paste.pythondiscord.com

[pure osprey]

Maybe like this: https://paste.pythondiscord.com/apefalodel.php

well, not quite like that...

More the moving in and out of the lists code.

[sudden hamlet]

I can try to put together an example

[pure osprey]

I dont have my ESP32 on me at the moment, Ill have to test it later.

[sudden hamlet]

Yeah it wouldn't actually work

Just an example of a structure

[pure osprey]

OK cool. Ill try out some stuff when I get home.

[pastel stratus]

Noice

[sudden hamlet]

sorry i went to sleep lol

ang on

[sudden hamlet]

still working on it

please hold

[sudden hamlet]

https://paste.pythondiscord.com/robeyewaco.rb @pure osprey

[hallow igloo]

@pure osprey what kind of project are you wroking on?

[hallow igloo]

Does anybody know any decent motor controllers for a raspberry pi? I just want to control some little DC ones

Also for an interface to control the motors wirelessly could I just use the built in Bluetooth and wifi or would I need to get a reciever as well

[pure osprey]

An ESP32 based smartwatch

[sudden hamlet]

did you see my example code

[pure osprey]

yup. Looking at it now.

I dropped it into https://repl.it to test it out. Didnt know there was an example module called ABC in python...

[pure osprey]

its doing a weird thing...

When I choose "back" in the dog list, it goes to the main menu, but renders the dog list untill I choose up or down.

[sudden hamlet]

huh

i had that bug but i thought i fixed it

also ABC there is completely optional, it basically lets you make base classes that require their subclasses to define things

https://paste.pythondiscord.com/ropumipimo.py @pure osprey

should be fixed

it would be nicer to call main_menu.render in the main control loop but i imagine you only want to redraw the screen when something has changed

[pure osprey]

Yes

I can also call render when the time updates.

or on the GPS screen when the position updates

[sudden hamlet]

yep

and the render calls bubble down, so you can just call render on main_menu and it will draw the current menu

but if you want a permanent status thing on all screens then you could do that just after calling render

[pure osprey]

True

Can I still do the idea I had with the popup menu at the bottom on each screen?

Im guessing I'd modify the render function?

[sudden hamlet]

yeah so i would have another render function which calls render on the main_menu, then draws all the extra stuff

[pure osprey]

hmm. I found someone a long time ago that made something similar to the idea I had, kind of inspired it, but I cant find it. I know he had the code in github.

it was arduino though

[pure osprey]

I FOUND IT

https://www.youtube.com/watch?v=k8Vvc4KfPOU&t=0s

The way the selection works and the menu hiding when not used

[hasty zealot]

Hey @pure osprey!

It looks like you tried to attach file type(s) that we do not allow (.ino). We currently allow the following file types: .gif, .jpg, .jpeg, .mov, .mp4, .mpg, .png, .mp3, .wav, .ogg, .webm, .webp, .flac, .m4a.

Feel free to ask in #community-meta if you think this is a mistake.

Hey @pure osprey!

Uh-oh! It looks like your message got zapped by our spam filter. We currently don't allow .txt attachments, so here are some tips to help you travel safely:

• If you attempted to send a message longer than 2000 characters, try shortening your message to fit within the character limit or use a pasting service (see below)

• If you tried to show someone your code, you can use codeblocks
(run !code-blocks in #bot-commands for more information) or use a pasting service like:

https://paste.pythondiscord.com

[pure osprey]

and I found his code and copied it here: https://paste.pythondiscord.com/nemusoyabe.cpp

[hallow igloo]

Anyone use an adafruit display here? I'm trying to write a script to try and get and output the cpu temp on it. This is what im currently using but it refuses to display the temp

cmd = os.popen('vcgencmd measure_temp').readline()
    CPU_TEMP = cmd.replace("temp=","Temp:").replace("'C\n","C")```

[pure osprey]

which display? 128x64, or 128x128?

[hallow igloo]

128x32

the thin monochrome one. SSD1306

[pure osprey]

oh ok. You using micropython?

I would assume yes

[hallow igloo]

Yeah im trying to. This is what i have going so far

https://pastebin.com/k2s6Sw86

i was able to get everything else working but the temp just refuses to display

[pure osprey]

you using this: https://github.com/adafruit/micropython-adafruit-ssd1306 ?

[hallow igloo]

yea i think so.

im using arch linux so i got the files off the aur

[pure osprey]

Ohh our using raspberry pi

[hallow igloo]

yea

[pure osprey]

ok, drop this in the same function that draws the text on screen. If it prints all of these, then its an issue with the screen. If not, there's an issue with how your getting the data.

print(str(CPU))
print(str(CPU_TEMP))
print(str(MemUsage))
print(str(Disk))
print(str(IP))

let me know what happens, and i can help you out

[hallow igloo]

so its displaying it but its blinking on and off now

[pure osprey]

huh

the whole display?

[hallow igloo]

no just those parts, the temp and stuff

[pure osprey]

which parts?

CPU? TEMP? Mem?

or all of them?

[hallow igloo]

The temp and the network

[pure osprey]

how quickly is it blinking? slowish? or like strobing?

[hallow igloo]

it goes off then goes on with the updates value

[pure osprey]

hmm

It may be that you are requesting the temp too quickly.

you looked into the psutil module?

its a python module that gets system info

[hallow igloo]

yea.

[pure osprey]

your using bash commands

if you use native python rather than relying on bash, it will be more stable.

[hallow igloo]

You're reffering to the cmds?

under while true right?

[pure osprey]

try this: https://pastebin.com/i9Qr58Gf

I changed it all out to psutil

Let me know if it errors

[hallow igloo]

CPU_TEMP = psutil.sensors_temperatures()['coretemp'].current
TabError: inconsistent use of tabs and spaces in indentation```

line 55.

[pure osprey]

uhhh what?

https://pastebin.com/NhA90NUf

i used tab instead of space

🤦‍♂️

[hallow igloo]

Happens to the best of us xD

[pure osprey]

yup

any luck?

[hallow igloo]

Traceback (most recent call last):
  File "/home/cmarkows/RGB_Cooling_HAT/oled.py", line 55, in <module>
    CPU_TEMP = psutil.sensors_temperatures()['coretemp'].current
KeyError: 'coretemp' ```it seems to work except for this

[pure osprey]

Hmm

Are you using something like Thonny on the pi?

in the python shell, run:

import psutil
psutil.sensors_temperatures()

and give me the output

[hallow igloo]

import psutil

psutil.sensors_temperatures()
{'cpu_thermal': [shwtemp(label='', current=50.634, high=None, critical=None)]}

[pure osprey]

AHA

its cpu_thermal

[hallow igloo]

instead of psutil?

[pure osprey]

https://pastebin.com/NhA90NUf

nope. Updated.

try the above code

[hallow igloo]

CPU_TEMP = psutil.sensors_temperatures()['cpu_thermal'].current
AttributeError: 'list' object has no attribute 'current' ```

[pure osprey]

hm

[hallow igloo]

Thank you so much for taking your time to do all of this by the way. You're a life saver

[pure osprey]

https://pastebin.com/NhA90NUf

Your welcome.

lmk if it works

[hallow igloo]

It’s blinking back and forth between the temp and everything else. It does display the temp this time though

[pure osprey]

????

why is it doing that? Is that what you wanted?

[hallow igloo]

it displays the temp along with everything else so it does what its supposed to do. I was hoping for the temp to be laid out under everything else and have it as one thing but i dont want to be a burden and such.

[pure osprey]

What is the b'<etc>on the second screen?

[hallow igloo]

That i dont know. I've been trying to figure that out

its displaying more than one output of cpu_thermal. does it have more than one output?

[pure osprey]

hmm

try running this in python shell:

import psutil
psutil.sensors_temperatures()['cpu_thermal'][0].current

[hallow igloo]

import psutil

psutil.sensors_temperatures()['cpu_thermal'][0].current
50.147

[pure osprey]

psutil.virtual_memory().percent

[zinc flax]

guys gimme a Link to phyton pls

https://tenor.com/view/puss-in-boots-cat-sad-face-please-emotional-gif-10136432

CUTE 🙂

[pure osprey]

https://www.python.org/downloads/

[pure osprey]

run this now:

import psutil
psutil.virtual_memory().percent

[zinc flax]

K thx

[hallow igloo]

import psutil

psutil.virtual_memory().percent
6.7

[pure osprey]

ok, Now this:

psutil.disk_usage('/').percent

[hallow igloo]

psutil.disk_usage('/').percent
10.8

[pure osprey]

psutil.net_if_addrs()['wlan0'][0].address

run that

[hallow igloo]

psutil.net_if_addrs()['wlan0'][0].address
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
KeyError: 'wlan0'

[pure osprey]

aha

run

psutil.net_if_addrs()

[hallow igloo]

psutil.net_if_addrs()
{'lo': [snicaddr(family=<AddressFamily.AF_INET: 2>, address='127.0.0.1', netmask='255.0.0.0', broadcast=None, ptp=None), snicaddr(family=<AddressFamily.AF_INET6: 10>, address='::1', netmask='ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff', broadcast=None, ptp=None), snicaddr(family=<AddressFamily.AF_PACKET: 17>, address='00:00:00:00:00:00', netmask=None, broadcast=None, ptp=None)], 'eth0': [snicaddr(family=<AddressFamily.AF_INET: 2>, address='192.168.1.208', netmask='255.255.255.0', broadcast='192.168.1.255', ptp=None), snicaddr(family=<AddressFamily.AF_INET6: 10>, address='fe80::a30d:2bb2:211c:4e64%eth0', netmask='ffff:ffff:ffff:ffff::', broadcast=None, ptp=None), snicaddr(family=<AddressFamily.AF_PACKET: 17>, address='dc:a6:32:b2:c3:96', netmask=None, broadcast='ff:ff:ff:ff:ff:ff', ptp=None)]}

[pure osprey]

WHOA

[hallow igloo]

thats what i said

[pure osprey]

oh duh your using ethernet

[hallow igloo]

yea xD

[pure osprey]

run psutil.net_if_addrs()['eth0'][0].address

in python shell

[hallow igloo]

that did it.

192.168.1.208

[pure osprey]

https://pastebin.com/NhA90NUf this is the fully working one

lmk if the screen flashes anymore

it was printing the error on the OLED

ha

[pure osprey]

https://pastebin.com/NhA90NUf

try it now

[hallow igloo]

File "/home/cmarkows/RGB_Cooling_HAT/oled.py", line 59
Disk = "Disk:"+str(psutil.disk_usage('/').percent)+"%"
TabError: inconsistent use of tabs and spaces in indentation

[pure osprey]

AUUGHGH

https://pastebin.com/NhA90NUf

tabs vs spaces again...

it doesn't show you when they're different!

[hasty zealot]

@zinc flax Please don't try to ping @everyone or @here. Your message has been removed. If you believe this was a mistake, please let staff know!

[zinc flax]

Guys Creeper

AWWW

MAN

UHM

UMM

SO quiet

AT ALL

😦

[pure osprey]

https://pastebin.com/NhA90NUf

try that

I ran it through a win to unix converter, could have had some line endings that are weird

[hallow igloo]

No difference. Still shows the two different info sets

[pure osprey]

huh

[hallow igloo]

it blinks faster now tho

[pure osprey]

huh

erg

that's frustrating.

You sure you dont have another script running?

try rebooting the Pi if you can

I've had issues where it was something cached on the pi that caused weird things

LMK if it changes after a reboot

[hallow igloo]

that did it!! 2 of my failed attempts of this code were running in the background

sigh

[pure osprey]

AH

yeah, i've had that happen...

Glad I could help. Gotta vid of it working?

[hallow igloo]

Thanks a ton man!!! You’re a life saver!!

[pure osprey]

Nice! You're Welcome!

I love messing with this stuff. I'ts just fun for me.

[hallow igloo]

Yeah its fun for me too.

except for when its something system critical like this xD

[pure osprey]

Working on this atm

its a pi zero portable thing

the circuit is for the OTG to work on the same port that charges it

[hallow igloo]

Nice! thats a FAT battery for a pi zero. i thought they didnt take much power

[pure osprey]

its actually from a v20 phone

its pretty slim. about 2.5-3mm

its on glass. reflection.

it took me FOREVER to figure out that circuit.

[hallow igloo]

oh nice scavenge looks good too.

hope it comes through for ya

[pure osprey]

Q1 is what's called a JFET, or basically a normally closed MOSFET

I didn't know they existed and I originally had this:

the new one is ALOT less complicated.

[hallow igloo]

Wow talk about a good consolidation job. I love it when im able to do more or the same with much less. I've spent hours tweaking this pi just to get an extra second shaved off the boot time cuz its just fun to deal with command lines and stuff

[pure osprey]

thats actually pretty cool

never thought of doing that...

just curios, is it possible to run pygame without the desktop version of raspbian?

as in raspbian lite?

[hallow igloo]

yeah. Thats why i use a command line instead of raspian or noobs. Why would you need a desktop interface if you're only gonna use to it open the terminal anyway.

i'm not sure. maybe

[pure osprey]

Oh wait, nvm. I forgot I wanted it available for my pi zero...

I have an HDMI output

dur

ben heck used to make so many cool pi portables...

[hallow igloo]

I've heard of him. Havent seen much of him though. Isnt everyhting prebuilt now? They have like prebuilt cases for gameboy emulators where you just add the battery and slide the PI in

[pure osprey]

yeah, bu they be expensive.

[hallow igloo]

^

[pure osprey]

I JUST FOUND THE COMPLETE ARCHIVE OF THE BEN HECK SHOW

https://www.element14.com/community/community/experts/benheck/ben-heck-exclusive/content?filterID=contentstatus[published]~objecttype~objecttype[document]&filterID=contentstatus[published]~language~language[cpl]&sortKey=contentstatus[published]~creationDateAsc&sortOrder=1

[hallow igloo]

man some of these title seem interesting. Might hop onto one of them for a watch and copy him. xD

[pure osprey]

You gotta have an element14 account, but its free.

and it has them IN ORDER

[hallow igloo]

Thats fine. ive made accounts just to get downloads. I usually make burner emails just for that purpose. Well, i gotta go now. I gotta actually deploy this PI. Thank you so much for the help today.

[pure osprey]

Your welcome!

btw, episodes 84-85 are his first pi portable

[steady flare]

anyone have a simple turtorial on how to use a basic lcd screen with the raspberry pi

i've been trying to find a simple turtorial but a lot are confusing

[cyan ruin]

hey there

someone who can help me with assembler code?

https://gyazo.com/1e92bfc9d2cb648c70a583ae0418d099

output should be :

>A = 
>B = 
>A + B = 
>A - B = 

but i don't get it why i can't take the value A,B

i tried 0x0F / 0x25 but is not working

[sudden hamlet]

wait are you writign this in hex

why

this isnt even assembly

[cyan ruin]

Well this is very primitive assembly

And yes it is hex ...

I need this for an exercise from the university

[stuck thicket]

WE ARE LIVE! ASK AN ENGINEER! https://youtu.be/28ogibtce-w

[hallow igloo]

Crap I just missed it

Anyhow

I want to control some smaller motors using a raspberry pi

What motor driver should I get

If possible I would like variable speeds

[rotund swallow]

a l293 wont work?

[hallow igloo]

https://www.amazon.com/dp/B01DG61YRM/ref=cm_sw_r_cp_apa_fabc_CS1BC1JYBJYMFCGG2PMG?_encoding=UTF8&psc=1 like this?

[robust orbit]

how to change heap size in mpy_cross?
i tried:
py -m mpy_cross heapsize=1000k data.py
but it gives me "multiple input files" error

[hybrid current]

how do I stream my usb webcam onto html for a webserver using flask? (Raspberry pi 4)

[old mountain]

Hey guys

So how can Micropython be used to compile Data from Sensors (Ex: BMP280) (just a newbie to microcontrollers)

[sturdy ridge]

@old mountain Need to read the BMP280 data sheet, figure out relevant I2C addresses and start an I2C class

[sturdy ridge]

That's for an arduino, you'll want one specific to raspis

[hallow igloo]

ok

[hallow igloo]

That's a pretty complicated question

You want to livestream your camera to a flask server?

The easiest way would be to stream to twitch then have an iframe with the twitch link

but that will have a lot of latency

If you want to host the stream yourself you will need to go deep down the google rabbit hole

There are plenty of guids for streaming to flask out there

like this one
https://blog.miguelgrinberg.com/post/video-streaming-with-flask

[sudden hamlet]

uh

why not just use something like nginx for the video stream then have a video tag in html which points to it

[old mountain]

Thanks, btw, If I may ask, what is a I2C address?

[hybrid current]

why use nginx? Is it better? thank you

[iron vale]

Alright guys, can anyone help me out with this

So i know i need to soilder the cable, but, I can't get the metal part to "fit into" the casing

Doesn't screw in, i pressed really hard, and nothing

[halcyon vine]

is it possible to communicate between an arduino nano and an esp32 running micropython? I can't get it to work using machine.I2C and the Wire library

[lime grotto]

Never done that but the Arduino is 5V and the ESP32 3.3V. May that be your Problem?

[halcyon vine]

I'm using a logic level converter between them

[lime grotto]

Ok, I'm out then i guess

[hallow igloo]

@halcyon vine for using i2c you need a master and a slave. The arduino and esp32 are both masters so I don't think you can communicate between them with i2c

[halcyon vine]

doesn't the arduino wire library have a slave function

[hallow igloo]

probably but you need to set it up right

can I see the code your using?

And can you give me more details of your project? Maybe you can be doing what your trying to do using data pins

[halcyon vine]

I'm trying to transfer IR codes over to the arduino for transmission

all whole numbers

do you want me to upload the file or copy-paste

[hallow igloo]

copy paste

you can write code on discord like this

[halcyon vine]

#include <IRremote.h>
#include <Wire.h>

IRsend irsend;
unsigned int irSignal[259];
char irBytes[518];
unsigned int currentSpot = 0; //integer used to determine next available spot in char (byte) array
bool readyToSend = false; //bool used to determine if irSignal is full and ready to be transmitted

void setup()
{
  Serial.begin(115200);
  Wire.setClock(100000);
  Wire.begin(4);                // join i2c bus with address #4
  Wire.onReceive(receiveEvent); // register event
}

void loop() {
  if (readyToSend)
  {
    int khz = 38; // 38kHz carrier frequency for the NEC protocol
    irsend.sendRaw(irSignal, sizeof(irSignal) / sizeof(irSignal[0]), khz); //Note the approach used to automatically calculate the size of the array.
    readyToSend = false;
  }
}

void receiveEvent(int howMany)
{
  while(Wire.available())
  {
    char c = Wire.read(); // receive byte as a character
    irBytes[currentSpot] = c;
    currentSpot += 1;
    Serial.println(currentSpot);
  }
  if (currentSpot >= 518)
  {
    currentSpot = 0;
    unsigned int x = 0;
    for (unsigned int i = 0; i < 259; i+=2)
    {
      irSignal[x] = irBytes[i]|irBytes[i+1]<<8;
      x += 1;
    }
    readyToSend = true;
  }
}

[hallow igloo]

btw what transmission are you doing? like serial transmition back to a computer?

[halcyon vine]

with an LED

send IR codes to my aircon

[hallow igloo]

whats an aircon?

[halcyon vine]

air conditioner

[hallow igloo]

wtf does an air conditioner need ir codes for?

[halcyon vine]

to recieve commands from the remote

[hallow igloo]

like a smart house?

[halcyon vine]

I guess

but that's kinda the point of the project, to send the IR codes without actually being there to press buttons on the remote

[hallow igloo]

i c

[halcyon vine]

so any issues with the i2c that you see

[hallow igloo]

I think your if statement needs to be in the while loop no?

in the function receive

[halcyon vine]

the while loop should break when there are no more bytes coming over, and then the if statement is to check if the full code has been sent (because of the 32 byte limit imposed by the wire library)

also, just to clarify, the big problem is that I can't even get the esp32 to find the arduino with the i2c library. the .scan() function just returns an empty list

[hallow igloo]

1 char is 1 byte right?

[halcyon vine]

yeah

[hallow igloo]

ok well your i2c pins are sda and scl right

[halcyon vine]

yeah I'm pretty sure

I quadruple checked

[hallow igloo]

and you also have to connect grounds together

[halcyon vine]

through the level converter or directly?

[hallow igloo]

what is your logic level shifter?

ground can be connected directly

[halcyon vine]

this is the one I'm using right now:
https://core-electronics.com.au/logic-level-converter-bi-directional.html

[hallow igloo]

did connecting grounds together make a difference?

[halcyon vine]

oh I haven't tried

[hallow igloo]

well try it

[halcyon vine]

okay

[hallow igloo]

try a scan with the grounds connected

[halcyon vine]

nothing

[hallow igloo]

crap

[halcyon vine]

I need to go now, I'll be back later on

[edgy oxide]

@halcyon vine if you're still working on this i may be able to help, i have similar hardware here. Ping me

[halcyon vine]

@edgy oxide I'm probably late to the party but I might as well ask

[edgy oxide]

So you need to make sure that your slave i2c and your master i2c are running at the same speed

[halcyon vine]

they are

I tried both 100kHz and 400 kHz

[edgy oxide]

Other than that make sure that both SDA and SCL are connected. Power and Ground can be to any valid ground and Power pin (provided the pin gives enough v)

And the device wasn't visible when scanning at all?

[halcyon vine]

nope

[edgy oxide]

What does your wiring look like

If possible could you send a picture of it

[halcyon vine]

okay hold on

[edgy oxide]

Also, providing your wiring is correct, what does the code on the slave device look like

[halcyon vine]

https://discordapp.com/channels/267624335836053506/545603026732318730/817430776072896532

[edgy oxide]

Ok

How does the wiring look

Also for testing sake, can you comment out the code for IR sending

(IR sending works with precise timings that can mess with other stuff)

[halcyon vine]

is this okay?

[edgy oxide]

Ah you have it all soldered already

Thought it would be on a breadboard tbh

Can you upload test master-slave i2c code to each to test the connection?

[halcyon vine]

the code I have already or another test thing?

[edgy oxide]

Something that is confirmed to work that just works with I2C

Or write some code to check the pins directly

Cause I have a feeling something is up there

[halcyon vine]

it's not working, I need to check my wiring hold on

[halcyon vine]

okay so there was a loose wire, I fixed that and both the pins can receive signals now, but i2c still isn't working

[verbal karma]

Is there something (a program) With That i can Simulate a curcuit?

[sturdy ridge]

Digital -> logisim
Analogue -> LTSpice

[hallow igloo]

is there any way to use python code on an arduino nano

ping me when theres an answer i

[sturdy ridge]

not really, you need a board that supports micropython

or circuitpython

[hybrid current]

How to I change the speed of my dc motors? (Raspberry pi)

[sturdy ridge]

How are you driving your DC motor

[hybrid current]

Using a L298n motor driver

[sturdy ridge]

PWM it

Lower duty cycle -> slower speed

[naive ruin]

could you just add more resistance also?

I'm working on a similar project with a pi and motor

[sturdy ridge]

@naive ruin They want to control the motor speed using the raspberry pi, adding resistance is a static thing

But also no, that's now how you change speed using motors.

It does work sort of, but it's static, then you're losing a lot of energy in the resistor (assuming you have a resistor the right wattage to handle that), and as your load changes your speed changes more

[naive ruin]

oo ok thank you

[opal furnace]

With microPython on an ESP32, how difficult would it be to check an email account for new emails? I don't need to open or read them yet, just know when they have arrived.

[sturdy ridge]

At that point, just get a raspberry pi @opal furnace

[opal furnace]

the difference is I would have to buy a raspi

I already have the ESP32

[edgy oxide]

Can ESP32 access the internet?

[sturdy ridge]

It can but it's more low level

[sturdy ridge]

https://randomnerdtutorials.com/esp32-send-email-smtp-server-arduino-ide/

It's for sending but you can modify that

You want the SMTP details of your email provider

And use the relevant library

[opal furnace]

sweet

thank you!

wait, that's not micropython

[sturdy ridge]

Don't think anyone's implemented an SMTP library for micropython

[opal furnace]

that's sad

[sturdy ridge]

Eh, basically nobody uses micropython in the real world except hobbyists

Most things have little to no micropython support

[opal furnace]

blech

[craggy grove]

sup fam

[neon compass]

hey guys! im' really interested in learnign about microcontrollers, arduinos and the like. does anyone have any good resources on learning arduino/raspberry pi with python?

[sturdy ridge]

Arduinos don't really use python (in general nobody uses python for microcontrollers other than python hobbyists), you'll need to get a micropython specific microcontroller

If this is for career reasons, give up on python entirely because nobody uses python on microcontrollers in the real world. If hobbyist reasons, grab a micropython supporting board

[neon compass]

oh ok, i was mainly planning on using python because i'm enjoying it so far, would using something lower level like c be a better option then?

[sturdy ridge]

Arduinos use C++ with Arduino specific libraries

What's your goal?

Career? Hobbyist?

The two are vastly different paths

[neon compass]

man, i just want to mess around with microcontrollers and have some fun with them, i'm pretty young as well so i'd say i'm a hobbyist

[sturdy ridge]

In that case, arduino with the normal Arduino stuff is fine. Lots of tutorials and it's not really hard to learn

[stuck thicket]

Desk of Ladyada - Cyber Sunday on The Desk of Ladyada https://youtu.be/44UlA9iT_Ts

[long rover]

Can someone help me? I am getting the error math domain error

[opaque ginkgo]

is microservices related to this channel ?

[sturdy ridge]

No

[hybrid current]

How do I host a server on my raspberry pi using phone data
or anyother WiFi I can use outside my phone
Trying to controll a rc car outside my home?

[hallow igloo]

Either you connect the pi to an external server so you can send commands through that, or you give the pi a static IP

[hybrid current]

Sorry, I got my raspberry pi a few days ago, will this be laggy?

[hallow igloo]

The controls will be near instantaneous. If you want to transmit video that might be a little laggy depending on the connection and the way you do it. But it is possible to get the video latency to be under a second, or even less

There is a robot streaming site called remo.tv that can help with this. They have software to connect the pi to a their streaming server and its all free.

[hybrid current]

woah

thats really cool

ok thanks

[hallow igloo]

I stream a raspberry pi robot there using cellular reception

[hybrid current]

yeah I'm planning to do that, because I can't port forward on a phone

[hallow igloo]

I've also used sockets to connect to one of my servers to control the robot. I'm still figuring out how to host my own video feed.

you shouldn't have to port forward I dont think

[hybrid current]

Can I stream using a raspberry pi camera module or USB webcam?

[hallow igloo]

either is fine

[hybrid current]

Ok, thats cool

thanks

[hallow igloo]

how do you plan on streaming?

[hybrid current]

The streaming site?

or