general-chat

[tardy badger]

But there are highly specialized chips for FLIR image processing

[violet parcel]

I mean if aircraft have 32-bits 80 GhZ ADC there must be a reason

[tardy badger]

They usually have custom analog front ends that feed into an FPGA or ASIC specifically for image processing

[violet parcel]

Ive been trying to find a list of package sizes that have adapters on adafruit or are throught-hole or throught-hole like (like TQFP)

do you know of one or Id have to make one ?

[tardy badger]

You’d probably only find them for TSSOP/TQFP or similar packages

Also, looking on Digi-Key, the fastest 32b ADC only does 1Msps

The faster your ADC, usually the less resolution you can deliver

[violet parcel]

Looking on adafruit site they have adapters for qfn and the like . But these are pure SMD for me since they dont have legs

[tardy badger]

The fastest ADC on Digi-Key is 26Gsps and it’s resolution is 3b

[violet parcel]

as long as it has legs I can easily solder it to wire without an adapter that's why Id like to make a list of it.

TQFP with 12 legs per side starting to be too many legs though

[violet parcel]

do adc that are for rf transceiving count here (bits varies per frequency inputs 12 gsps output 2.6ghz) or are they different products ?) like this: https://www.analog.com/media/en/technical-documentation/data-sheets/ad9082.pdf ??

[tardy badger]

RF specific ones are different, but most people who develop high end RF systems tend to be weary of high bit resolution since it’s unlikely on input that 2 extra bits will really give you any difference in performance. Hence in this case, 12b ADC vs 16b DAC

I’d gather that most would rather spend the money on good preconditioning their analog inputs rather than trying to add more bit resolution over 12b

Also that ADC/DAC is like.. $1800

[glad ruin]

Hmm I wonder if I could get a free evkit for it

[tardy badger]

I imagine you could walk down the hall and find one on someone’s desk to borrow

Or maybe even find one in the same lab

Of course not borrow for personal use 😝

[violet parcel]

how do you actually know what resolution you need. Like Im seeing that 14/18 bits have a resolution of a couple of microvolts where as 10/12 bits is almost 1 milivolt. Obviously if you build a test equipment it's obvious you need to beas much resolution as possible. But medical stuff uses like a couple of milivolt so 14 would probably be suitable where as analog music disks would probably works with 10/12 ?

And I like to compare the best stuff to what I canm actually get to keep feeling like Im a the bottom of the pyramid and getting the worse stuff / 1970s surplus DIP chips 😦 🤣

[tardy badger]

Well, considering most of these chips are being used in high power transceivers.. I doubt you need much better than millivolt resolution

[glad ruin]

The ENOB (effective number of bits) is always lower than the resolution of the ADC.

[tardy badger]

Which is why chasing bit depth can be a fools errand when there are often better uses of time and money

Like good preconditioning

[glad ruin]

https://www.analog.com/en/technical-articles/how-to-calculate-enob-for-adc-dynamic-performance-measurement.html

https://www.analog.com/en/analog-dialogue/raqs/raq-issue-90.html

[violet parcel]

but what if the phenomena you are trying to measure is actually in the microvolts range like heart voltage ?

obviously you wont even be able to measure it without a good enough resolution

[tardy badger]

Then you’re not using a 1Gsps ADC anyway

You’re probably using something closer to 100ksps

[glad ruin]

That's where preconditioning comes into play. You would amplify those signals before feeding them to an ADC.

[tardy badger]

There’s not really any point in using a good ADC if you’re not going to precondition your signal to be usable.

You’ll end up reading mostly noise at that point

[violet parcel]

sure but you have to know you are actually getting signals first

maybe an heart is a bad example for DIY because obviously you will build the device very theorically until you actually connect it to someone

[late fulcrum]

And medical interfacing can be quite dangerous. However to know you're getting signals first, an oscilloscope is usually a workable way to start out.

[violet parcel]

But I tend to work in a waterfall/proof of concept way. ie: do I get any signal? yeah, ok try to pre-condition it, what do I get? do I need to add shielding etc

[late fulcrum]

I use a similar modular, divide and conquer approach. Build a stage at a time, seeing if it's viable at each step.

[violet parcel]

I dont quite understand how medical devices works for liquid. Seems like they actually drop a very small quantity on the chip directly with tubes inside them

and then they use boiling water with a detergent to clean it up/evacuate the liquids from inside after that or something

[late fulcrum]

There are several approaches, but some do just etch a channel into silicon and feed the liquid into it

[glad ruin]

At some point though you will need to lay theoretical groundwork.

[late fulcrum]

The chip based ones are disposable, so no need to wash them. The big industrial washable ones use much larger and more complicated (and expensive) assemblies.

As always, I suggest starting small (paper chromatography is simple and inexpensive enough children commonly do it, and yields scientifically useful results)

For the curious: https://www.thebestideasforkids.com/coffee-filter-chromatography/

Armed with the knowledge of how simple paper chromatography works, you have the basis for understanding electrophoresis, gas chromatography, Northern blots, and a host of other scientific techniques.

[tardy badger]

That’s a neat approach to learning about chromatography

[rapid geode]

feather is larger than my gearbox, haha. when you are modelling on screen you lose track of just how tiny the object is in real life

[sick apex]

is there any documentation for tiny usb

[raw jasper]

yup, there's a reason why devices that come into contact with the body are a separate class of medical device

In the EU, even software that analyzes biometric results (with the traditional meaning of the term, not the authentication-related one) can IIRC fall into the medical device regulation

[rapid geode]

hm. can you wire a pot to 2 devices? i want to read the servo potentiometer with the feather, as well as having it read by the servo controller. Not sure if that will have any effect on the reading

[glad ruin]

It's a good year for marionberries.

[raw jasper]

yay berries! :D

[dusty citrus]

Boy

[glad ruin]

52lbs picked in under an hour.

[raw jasper]

(that's about 23.6kg)

[I had to look it up, so I'm noting it here to maybe save somebody some time]

Nice! :D

[tardy badger]

I see pie in the future

[glad ruin]

Cobbler

[dusty citrus]

Handpicked? Gg

[glad ruin]

Yeah

[raw jasper]

That's some nice and practical fortune telling right there; "I see pie in your future" :D

[dusty citrus]

I wonder if you could like repurpose a vacuum cleaner without destroying the berries

[raw jasper]

Picking them is part of the fun though

At least I find it enjoyable

[rapid geode]

52lbs! that like... 26 pies! or, 2 meals!

[raw jasper]

Eating 2 meals of 10kg of berries each sounds like a good way to guarantee that your bowels will have a good, long talk with The Bowl

[glad ruin]

It'd be an hours-long monologue. Been there, done that.

[kindred isle]

I can relate to this. I kept working on my custom board for a project (should be arriving Monday!) and constantly thought "This thing is going to be so huge!"
Then measured the board. 30x66mm
Oh. That's positively tiny. Obviously could be smaller if I packed the components tighter, and used SMD, but it still fits in the palm of my hand.

[rapid geode]

it is the size of my head on screen.

ha

reminds me of 3d printing in general. you see macro pictures online and see all the flaws, print lines, stair stepping. then you get the thing in your hand and its like, oh, i can barely see the threads

[kindred isle]

Pretty much the same idea with this. 24" widescreen monitor, board is like a foot long on screen so you can see all the traces.
Then you add the measurements on the comment layer. Then it still doesn't sink in so you pull out a ruler and see for real how small it is.
Like, intrinsically I know how small a DIP-8 is. But it's not until you're holding it that you fully grasp how small it is. Then you remember there's smaller.

[rapid geode]

yeah

[ebon dew]

oh there's always smaller chips, cpu's are at like 3nm now.

[sick apex]

is there any way to emulate a USB controller on an ESP32-S

[rapid geode]

im making 0.1mm fillets going "hmm, that seems large" not realising that on a print that is basically a sharp corner

[sick apex]

i mean there has to be a way but like does anybody know of a way

without writing PIO assembly preferably

[ebon dew]

I don't know much about USB stuff, do you mean like a usb host controller? adafruit has some usb host boards now.

[glad ruin]

That's the bleeding-edge-currently-in-development stuff.

[sick apex]

i know but i already brought the ESP32s thinking i could do it

i have 2 RP2040 boards that can do it

but i cant wrap my head around the Pico SDK

it confuses me every single time

i know there is native support on the ESP32-S2 but i dont have those unfortunately

[glad ruin]

I don't think PIO would really be capable of implementing a USB host controller. Too complex.

[kindred isle]

If my design ever gets to the point where I can sell it (small scale sales) I'll settle for just the SOC-8 version of this chip. No need for the miniscule QFN version

[sick apex]

idk could i run one of the cores as some form of serial to USB converer

or something

[ebon dew]

what is the esp32-s? an adafruit board or different manufacturer? i'm unfamiliar with that one.

[sick apex]

espressif

i think its just the standard ESP32 but the listing said ESP32-S

[glad ruin]

From a packaging perspective I believe QFN is efficient and cheap to manufacture

[sick apex]

so idk

[raw jasper]

afaik there are no 3nm consumer chips on the market atm, right?

[ebon dew]

the ai thinker esp32-s?

[raw jasper]

yeah, that tracks, IIRC QFN takes hours to package

[sick apex]

espressif make the esp32

[kindred isle]

Also I look at my trace width, and keep thinking "is that really wide enough?" Kicad assures me that a .25mm trace is sufficient for .8A, well above my needs.

[sick apex]

i think

[raw jasper]

that is correct

[sick apex]

i need a new email

i stfg

[glad ruin]

Apple might be using it.

[kindred isle]

Maybe, but at the same time SOC-8 is listed for $1.65 each, QFN just over $2

[sick apex]

well either way, i need to figure out a way that i can get USB Device HID working on it

so any suggestions are welcomed

[kindred isle]

Either way though, I won't be assembling it, so it's not even a matter of that.

[ebon dew]

original esp32 from adafruit they call the huzzah. i'm just trying to translate it to an adafruit equivilent to see if there's usb host on it... which i don't think there is.

[raw jasper]

You could probably bitbang usb from the esp232. It wouldn't leave you time for much else though :P

[sick apex]

i know its not natively supported but surely with like 2 cores or whatever i could write a hardware abstraction layer or something that would let me interface with USB over serial

wait

actually

what if i use one of the cores

to emulate a usb controller

[ebon dew]

i think they used serial chips and not native usb back then?

[raw jasper]

why don't you get an FTDI dongle?

[ebon dew]

yeah FTDI is what i was thinking

[sick apex]

what are they

im very stupid sometimes

[ebon dew]

to do it natively you'd have to make a custom board and by that point would just be easier to buy one that has the features you want. :/

unless you want a custom solution and big project, i mean that's up to you.

[sick apex]

well im going to build my own boards at some point but i cant find a good dev board with the right things that i need

its annoying

i preferably need a fast processor like the ESP32 at 240 MHz so it can crunch through very fast

i need USB support like the RP2040

[glad ruin]

Not knowing/understanding something doesn't make you stupid.

[sick apex]

and WiFi

[ebon dew]

s2, s3, c3

[sick apex]

i know but i've probably already read about them somewhere

[sick apex]

so basically all the ESP32s except the one that i brought

got it

[ebon dew]

yes unfortunately.

[sick apex]

i totally shot myself in the foot

[ebon dew]

the original esp32's can be run on wippersnapper and adafruitio.

i did the same thing and was like welp...

[raw jasper]

Nah, you aren't stupid, just a beginner.

In any case, the FT232RL is a chip made by FTDI (Future Technology Devices International Limited), which takes in serial data and then transmits them to the computer as an USB CDC (Communications Device Class) serial peripheral.

[sick apex]

the annoying thing is now that i have to wait a week because i spent all the money i have in my bank account and i maxed out the amount that im allowed to deposit a month

[ebon dew]

then wippersnapper came out and was like voila a great use for it.

[kindred isle]

It happens. I ended up buying like 3 wire packages trying to get one that I could actually make proper cables out of.

[sick apex]

fair

[raw jasper]

So, you talk serial to the chip, and the chip transmits the data to the computer as an USB serial port

[sick apex]

okay, second question

can i use Arduino code on a RP2040

[kindred isle]

First one had too much insulation, second one had too small cores, third one seems to barely work.

[sick apex]

because i absolutely hate the PicoSDK with a living passion

[fossil dawn]

yes. earlephilhower/arduino-pico. It's great

[sick apex]

it is deporable

[sick apex]

okay thank you so much

i'll use this

[fossil dawn]

https://arduino-pico.readthedocs.io/en/latest/

[sick apex]

because the pico sdk is so confusing

not the code just the location of all the header files

some are in pico/this

some are just this

and im using platformio which is amazing for arduino code

[kindred isle]

Arduino is less a programming language itself, and more an environment. The more important thing is "can you get a compiler for your target"

[sick apex]

now i gotta find a use for the 3 ESP32s i have

[sick apex]

i know but its more familiar

to me

i mean if you wanna see what im trying to do then i already wrote it all in python

but i had a much better idea

that i unfortunately cannot do in python

[ebon dew]

i've never used pico-sdk, nrf sdk, or esp idf. i stick with circuit python. the devs do all the work porting the code to a single language and i get to code in the same way on like 100 different boards. that's honestly one of the most underrated things about circuit python. i mean arduino is like that too but that's just preferernce.

[sick apex]

because its too high level

[sick apex]

well i wrote this project in circuit python already

[kindred isle]

Personally I don't like Python just because I don't generally like whitespace sensitive languages.

[sick apex]

https://github.com/bonsall2004/picoducky

its there already

but like i dont like it

because its too slow

i know i can make it faster

[ebon dew]

ah the ducky, yes quite a popular one too.

[sick apex]

yes

i quite like mine

[ebon dew]

hence the need for usb host

[sick apex]

i stole one part of it, in my defence i credited the guy i stole it from

but like its amazing

web interface

code editor

you can run scripts on the fly

enable disable auto run

change the SSID name and password

all without editing code

from a web interface

it was so annoying to code to begin with but once i learned python it was easy

i didn't know you could use C/C++ else i would have done that to begin with

[ebon dew]

there are many different versions of it out there in pretty much every programming language

[sick apex]

yeah i know but i dont want to code it because i want one

i just wanna code it to see if i actually can

not about the use more the satisfaction of making something that works

[raw jasper]

If you want to do the ducky stuff (script actions) on your local machine without an accessory that could potentially be considered a crimetool and expensive external hardware, it might be best to just learn autohotkey and be done with it

[sick apex]

and then i know my code base so if i want to add some cool functionality then i can

[ebon dew]

i think there's a learn guide on it for circuit python now too. maybe check out the hardware they used.

[sick apex]

its not illegal where i am, i already checked lmao

[kindred isle]

That's half the drive on my current project.
"I want to learn how to program raw microcontrollers"
"I bet I can read this shift register."
"I bet I can make a whole circuit board"
"Ha ha ha! This thing only exists because I deemed it so!"

[sick apex]

the annoying part is that i dont have much technology besides my PC and some micro controllers so i cant really build cool things

i think im going to buy an OLED display for my micro controllers and see if i can do something cool with that

[ebon dew]

https://learn.adafruit.com/neo-trinkey-circuitpython-rubber-ducky i don't think that one has host on it though

[sick apex]

i mean i have the basics like resistors, caps stuff like that

[sick apex]

see but with mine you can plug it in, move away very far and edit and customise scripts on the fly with your phone that's why i like mine

i find it cool

everyone elses is cool too

but like idk

[ebon dew]

i'm not sure if anyone's done one with an adafruit usb host device yet though.

[sick apex]

is that software or hardware

[ebon dew]

pretty sure they have a relatively new piece of hardware.. within the last couple months.

[sick apex]

omg

i can use SPI

SCI

i cant remember the abbreviation

i can use that to interface with USB

i remember watching something about it the other day

[ebon dew]

https://www.adafruit.com/product/5723

[sick apex]

you see, this is exactly what i mean

has everything i want

except one thing that is a complete deal breaker

doesn't have wifi

[ebon dew]

ah i see yeah lol

[sick apex]

imagine that with a USB A male on one end, USB A female on the other

with wifi

and an SD card slot

[ebon dew]

well it's a feather right... so an airlift featherwing would give you wifi

[sick apex]

that is my ideal board

for what im trying to do rn

[ebon dew]

https://www.adafruit.com/product/4264

[sick apex]

i'll just have to design my own

oh yeah, what are these

i have them on my board but idk what they do

[ebon dew]

built in antenna

[sick apex]

for what

[ebon dew]

wifi

[sick apex]

wifi or like AM FM

yeah

yk

i might just get one of these when i can

[ebon dew]

if you want to design your own board then you can get just the module https://www.adafruit.com/product/4653

[sick apex]

is it SMT or can i hand solder it

[ebon dew]

combine it with the schematics from the rp2040 feather usb host board and voila...

usually oven reflowi think definitely not hand soldered

[sick apex]

oh shucks

[ebon dew]

modules are for advanced board designers really. have to work your way up to that kind of thing.

[sick apex]

i'll just send it off to a place and have one made

it'll be expensive

[kindred isle]

They can be hand soldered, but it's a pain in the butt.

[ebon dew]

or that yes

[sick apex]

but it will definitely scratch that itch

or i can just use a hot air station

i have one of those

[ebon dew]

send the design off to jlcpb or pcbway or oshpark etc...

[sick apex]

yeah

well i wanna get a few things made

like an RJ45 male to female but with a wifi chip and a microcontroller built in

so i'll just have to make some board designs up and send them off

[kindred isle]

Pcbway allows up to 3 orders a month where they offer assembly for only $30 instead of the normal fee of like $90+

[glad ruin]

Or for people incorporating them into products without needing to do the RF work and associated regulatory compliance.

[sick apex]

noted

[ebon dew]

also cyber city circuits is good with that kind of thing, depending if you're in the USA, they might offer a design service where they might do consulting, for a price.

[sick apex]

are these the ones with USB Host

they look similar to the ones i ordered but they're not the same

[ebon dew]

looks like a slight variation on the classic esp32 you have, you'd run into the same issues.

[sick apex]

nuts

[ebon dew]

esp32-wroom is generally classic esp32

[sick apex]

does the C3 have usb host

[ebon dew]

i don't know, you'd have to look up the spec sheet. half of engineering is honestly just your nose buried in spec sheets.

[sick apex]

lmfao

noted

also wanna see something

truly

annoying

look at this

i can only use a single row of my mf slots with the esp32 on it

when i get paid onto my card im buying a bigger bread board

[ebon dew]

you can hook two breadboards together

[sick apex]

i dont have 2

[kindred isle]

Time to start running jumper wires under the board.

[sick apex]

its just flat plastic under there

imma just buy a new board

and some new Micro controllers

god i've already got 5

and i can only use 1 for what i want to

[ebon dew]

this is the one i have, love it. https://www.adafruit.com/product/443

[sick apex]

but it doesn't have headers so i cant use the pico probe

[sick apex]

alright I just deposited cash in my account, what board can I get that has WiFi, Bluetooth / ble and USB Device

preferably duel core

[crystal ore]

Do you need classic Bluetooth or is BLE enough?

[sick apex]

ive ordered the ESP32-C3

I read up and apparently that works

[weary fiber]

ughhhh UHF circuit design is hard and far above me

but I don't wanna wait until I'm in higher classes

[sick apex]

anyone know where I can get a micro USB male to usb male adaptor without a cable inbetween

acc nevermind

[weary fiber]

male (micro usb) -> male (usb A)?

'cause that's just a standard micro usb charging cable

if you want male (micro usb) -> male (micro usb), you can grab some heatshrink and make your own in a pinch

[tranquil swallow]

I think I’ll stop paying my credit card bills next month and let it go to collections I felt sick giving money to these subhuman scum

[rapid geode]

O_o

[crystal ore]

I support not giving money to credit-card companies, but the time to make that decision is before you use the card at the store...

[rapid geode]

yes

[sick apex]

yes

[sick apex]

ik bit without the wire

[weary fiber]

so you want (male micro usb) -> (male usb A)... NOT as a cable, but as a solid adapter.

That MIGHT exist..?

[rapid geode]

18650 battery holder for feather and servo power. should last 6 months or more. now i need a nice micro water proof connector set for a 4 conductor wire. hmmm.

[sick apex]

yes

if it doesn't I'll just butcher a cable and make one

[raw jasper]

what are you building?

[rapid geode]

secrit. little serve drives a worm gear when you press a button. so i need 2 buttons (3 or 4 conductors). and then the battery with a temp sensor. so i need a little universal cable connector end.

the system i am copying uses 2 conductors with can bus and power shared. but thats too advanced for my current testing

[rapid geode]

if you are going to lie this much about batteries, dont name your company ever fire...

[kindred isle]

I used a headset audio cable for a data cable for one of my projects. TRRS has 4 conductors, is pretty common, and even includes the abilty to spin around.

The only problem I had is that the conductors are poorly spaced/shielded. In my case I was running two channels of Neopixels, and if I repeatedly sent data to one, but not the other, it would corrupt the second channel. The solution was just to always update both at the same time.

[rapid geode]

headphone connectors are bigger tham my device

ha

also too easy to fall out and poor reliability, not waterproof, etc

thats 2 can bus version

[kindred isle]

I question how much strain you're expecting if a headphone jack falls out "too easy" I swear you can hang like a couple pounds off a 3.5mm connection.

[rapid geode]

snap in, but can be pulled out without damage. water tight

[raw jasper]

If you use these on an insured device, and it catches on fire, you'll be sure insurance won't be paying out

[rapid geode]

a lot of strain

[raw jasper]

"What did you expect? You bought EverFire-branded batteries!"

[valid marsh]

anyone any thoughtsd about solder paste witha hot air gun or an oven? I currently use an oven that does well, but there's a thing I need to solder soon that will require the rest of the board not to get too hot

[kindred isle]

Solder paste and a hot air gun is pretty common. Especially for repairs. I would expect it to be fine for small scale assembly too. Just make sure to not dwell on a single spot too long.

[rapid geode]

$39 for a single samsung battery locally. vs like $3.99 ifrom china. sigh. but i dont trust any of them to actually be real samsung

[tardy badger]

On funny thing I learned about python is that the self word used in python classes can literally be any word.

[valid marsh]

yeah, I was using my kiotchen oven just fine but I don't want to melt a compoinnent but the pads on it need paste

[raw jasper]

Promote cursed computing. Start using this instead.

[tardy badger]

for instance:

class Test():
  def __init__(me):
    me.first_name = ""
    me.last_name = ""

  def printme(me):
    print(me.first_name + " " + me.last_name)

it's perfectly valid

[raw jasper]

https://tenor.com/view/chaos-gif-22919457

[fossil dawn]

randomly switch between ich moi and 私 to add international flair to your code

[tardy badger]

lol

[kindred isle]

def __init__(thevoicesinmyhead)

[raw jasper]

Make sure to add 之 somewhere in the mix :P

[tardy badger]

def __init__(initfunnyhow)
   initfunnyhow.pythonbelikethat = "sometimes"

:3

[valid marsh]

this thing to be precise

https://www.adafruit.com/product/444#description

[fair summit]

pylint does complain about non-self:
me.py:2:4: E0213: Method should have "self" as first argument (no-self-argument)

[kindred isle]

Seems like pylint is just picky about it. First tutorial I found says you can use other things, "but it is advisable to use self because it increases the readability of code, and it is also a good programming practice."

[craggy crag]

void loop() {
  boolean success;
  uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0};
  uint8_t uidLength;

  success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
  if (success) {
    Serial.print("UID Value: ");
    for (uint8_t i = 0; i < uidLength; i++) {
      Serial.print(uid[i]);
    }
    Serial.println("");
    delay(500);

    
    String uidString = "";
    for (uint8_t i = 0; i < uidLength; i++) {
      uidString += String(uid[i]);
    }

    Serial.println("Making a GET request");
    String requestPath = "/NFC/add.php?uid=" + uidString;
    client.get(requestPath);
    Serial.println(requestPath);

    int statusCode = client.responseStatusCode();
    String response = client.responseBody();

    Serial.print("Status code: ");
    Serial.println(statusCode);
    Serial.print("Response: ");
    Serial.println(response);

    if (response == "1") {
      Serial.println("NFC card not recognized");
    } else {
      
      String values[3];
      int startIndex = 0;
      int endIndex = 0;
      int valueIndex = 0;
      while (endIndex >= 0) {
        endIndex = response.indexOf("|", startIndex);
        if (endIndex >= 0) {
          values[valueIndex] = response.substring(startIndex, endIndex);
          startIndex = endIndex + 1;
          valueIndex++;
        }
      }
      values[valueIndex] = response.substring(startIndex); 

      Serial.print("Name: ");
      Serial.println(values[0]);
      Serial.print("Post: ");
      Serial.println(values[1]);
      Serial.print("Card ID: ");
      Serial.println(values[2]);

      Serial.println("Wait five seconds");
      delay(5000);
    }
  }
}

hello, so am working on this little project and i need to display some info on an adafruit screen, but i dont seem to understand how to display on different lines, for exmple i want the name to be on top, then the post to be in the middle and the cardid to be at the end. thanks
https://www.adafruit.com/product/1651

[fossil dawn]

i bet you can use the Adafruit_GFX library for that

https://learn.adafruit.com/adafruit-gfx-graphics-library I recommend to read this tutorial from the beginning. At some point it will mention how to do text and how to put it in a specific location 😄

always check out the guides linked under adafruit products 😄

[kindred isle]

Yeah, you're putting everything out to the serial connection. You need to use the GFX library instead.

Also I'll give you a head's up, putting text to a screen is a lot like putting it out to serial. Major differences being that you get to pick the colors, and where the text starts from.

[patent hemlock]

i messed with some .Net devs working on a Python project when I was refactoring (e.g. fixing) and renamed self, to (coincidentally enough) elmo

[tardy badger]

This is hilarious

[glad ruin]

Like the rest of the language, self is just a loose convention. Instances are always passed as the first positional arguments in methods.

If you really wanted to mess with people, you could name it none.

[violet parcel]

renames super in java to hyper cuz hypernovas >>> supernovas

[rapid geode]

woo. stainless 3d print in use. haha

[raw jasper]

I write python and sometimes wonder what we will be thinking of python in the future

Also, since scripting languages are kinda sorta known to come and go in waves, I wonder what the next scripting language du jour will be

(except Tcl. This one will probably outlive humanity, much like roaches, thanks to the power of All The EDA Companies)

[honest jolt]

Tcl (pronounced "tickle" or as an initialism[8]) is a
https://en.wikipedia.org/wiki/Tcl
I hate that Tcl can be pronounced tickle

[half plank]

How can i fix the Unable ot load content privatley notification on the iPhone mail app. I have tried everthing but nothing is working.

[tardy badger]

I also hate that it’s called tickle.. it makes me uncomfortable because I hate being tickled

[raw jasper]

I just say "Tee See Ell", similarly to how I say "Ess Queue Ell" and not "Sequel" for SQL

[tardy badger]

I say Tee See Ell as well

[raw jasper]

TIL there were famiclones (famicom clones) that ran a version of DOS a DOS-like system and accepted floppy drives

https://www.youtube.com/watch?v=kp4Rr7CJBAI

[kindred isle]

I'm reminded of this thing that was available for the N64. It was ostensibly meant to let you play VCDs on your N64, but it just happened to be able to dump N64 roms from cartridges, save them to a writable CD, as well as load said roms for playback, but this was totally just a coincidence and you really shouldn't do that.

[raw jasper]

ah yes, the bung doctor v64

[tardy badger]

My lemon is coming back ❤️

It had a rough winter, losing all its leaves. But I didn’t give up hope

Finally felt okay putting it outside last weekend

[raw jasper]

the miracle of lime!

[tardy badger]

The best part is it actually flowered before it lost all its leaves meaning it’s mature enough to produce fruit 🙂

And my coffee plant that has been on a slow recovery since last year in the spring where a city water change essentially poison it and it’s sibling plant who sadly didn’t make it

It was very bushy before. It nearly died

[raw jasper]

Wow, that's some mad dedication

Nice!

[rapid geode]

This is tricky. meyer lemon cutting will flower and fruit in the first year. Ideally you are supposed to pruner the fruit for the first 2 years or so

[tardy badger]

Yeah, I let the flower fall off

I’ve grown citrus before, I’m not expecting fruit for another years or so

[rapid geode]

one of mine was grafted whihc is supposed to make it more durable. (flying dragon root stock). but the ones from cuttings grew quite well

[tardy badger]

Yeah, that tracks

The root stock tends to help constrain size though. Cuttings will often grow to the full size which for Meyer lemons can be 3-4m

[rapid geode]

that too yeah

[tardy badger]

Opp, i was off by 1m on my range

2-3m

6-10ft

[rapid geode]

my peach tree will get up to 25ft if you dont trim it

i need to keep it under 8-10

it grew well this year. tonds of branches spreading wide. 2 ft of new growth each branch

the plum has just started growing. weird, i assumed it would do branches in spring liek the peach

[tardy badger]

My parents have a pear tree that I planted that I have them keep to 8ft tall

It’s grows massive softball sized pears

It didn’t produce but one pear this year though because of a late frost

[rapid geode]

wow

when i do the back yard ill move the plum. put a second peach in front. and put another plum and 2 apples in the back. and maybe a pear.

[tardy badger]

They also have two nectarine trees I planted, only one nectarine off those due to late frost

[rapid geode]

ah

yeah we had warm early on and then frost. i thought all the peaches would die

but i got at least 15 on there

over 1.5" diam now

[tardy badger]

And there’s 3 grape vines, a concord and two Catawba

[rapid geode]

mmm. i wanbt a concord vine. not sure where to put it yet.

[tardy badger]

And a Macintosh Apple tree

[rapid geode]

side of the house is ideal, but it may get disrupted in construction later

my apple is granny smith

i want a golden delicious as well

[tardy badger]

Oh wait almost forgot about the dwarf cherry tree. They get about a pound of cherries a year on it

[rapid geode]

ha

[tardy badger]

It grows basically as a cherry bush

My coffee plant I’m waiting till it has another strong branch to start into another coffee plant.

[raw jasper]

I know that macintosh is an apple cultivar (from which the apple machines got their names), but the phrase "macintosh apple tree" never fails to make me chuckle a little

[tardy badger]

Lol

[rapid geode]

O_o

the mac computer was named after the hamburger, cause steve jobs ate it every day

tim apple confirmed this on twitter to it must be true

[cold pebble]

hypothetically

if I want to make a smartwatch with programmable apps written in a custom coding language

would it be better for me to:
a. compile to some bytecode I make up and interpret that
b. compile to native machine code for the microcontroller, and load that into memory and run it

advantages of a:
-probably much easier to make
-easier to port to a different microcontroller if I change the watch design for a future version / iteration
-I can implement whatever sandboxing I want obv

cons of a:
-worse performance
-harder to ensure it has access to all necessary features

pros of b:
-better performance
-should be able to access most important stuff more easily

disadvantages of b:
-waaaay more work to make
-super difficult to port to a different microcontroller architecture if I ever switch in a future iteration of the watch
-impossible to sandbox so the apps might break stuff

what would you guys suggest?

[glad ruin]

I don't think there's really any need to invent your own virtual machine. That's complicated enough even without the constraints of a microcontroller.

[cold pebble]

harder than compiling to native though? especially if it's a much simpler virtual machine than a real microcontroller?

[glad ruin]

To develop a virtual machine from scratch that runs on microcontroller vs. cross compilation with an existing toolset? Yes, it'd be a lot harder.

[cold pebble]

hmm you make a good point about the cross compilation, I wouldn't have to do that from scratch

though since the apps don't need to be super performant or anything it's not like the constraints are that difficult either

[glad ruin]

Keep in mind that with microcontroller there's really no notion of "apps". You can install different firmware, but without an MMU (memory management unit) there's not really any good way to isolate application code.

[cold pebble]

well, in a custom VM it is

[glad ruin]

Memory will be your main constraint.

[glad ruin]

That's called an operating system /hj

[cold pebble]

also do multiple apps need to be able to run at the same time for it to count as "apps"? I was gonna have almost 0 ability for them to do stuff outside of when they're open and there's only 1 app open at a time

so it's not nearly as hard as a real OS

not even close

orders of magnitude

[glad ruin]

That's... debatable. Do you consider DOS to qualify as an OS?

[cold pebble]

but like, is Java an OS?

plus if I do want certain limited background functionality it's almost easier to do interpreted than having to link that to the cross compiled code as that would be a whole hassle

like how would I even start running the cross compiled code at the right spot? I'd need to set up some kind of loading/dynamic linking anyway

so at that point easier to make an interpreter

which isn't really much of a VM except maybe technically

[glad ruin]

Java is a virtual machine, and generally speaking it runs on top of an OS.

You could use an existing VM. Lua for example has a very lightweight VM and has been used in embedded applications for years.

[cold pebble]

but java manages stuff related to memory in the programs it runs so it's an OS /hj

[cold pebble]

but I don't really want a real vm for a real coding language

I want some dumb thing for my own oddly specific creation

the only real reason not to is performance and some parts being tedious to make

but I have no real idea what the performance might look like

...

waaaait

this is one of those "try it and see" moment's isn't it?

I should probably do that instead of wasting your time lol

see if I like the idea of trying to make a bytecode interpreter

by trying it

to make like a tech demo / proof of concept of what I'd actually wanna make

[glad ruin]

You certainly can! I was just suggesting that you use an existing bytecode interpreter.

[cold pebble]

might make sense too, depends how the design of my product goes

I'm still doing a lot of figuring out what I want to make

[sharp nexus]

HELLO

I need 1 thing

constant current source for bipolar analog current output

anybody here knows how to achieve this beautiful trait?

[cold pebble]

... ok this is just embarassing

so I was working on my smartwatch

and I noticed that after a few seconds it stopped logging bluetooth data recieved to the serial monitor so I freaked out and kept looking through my code interacting with bluetooth to find the issue

nope! turns out...

I forgot to disable the code where it goes into a weird sleep mode after not moving for a few seconds

[sick apex]

i accidentally ordered 20 meters of LED strips

[fossil dawn]

you can use your ESP32 with that LED strip to build a WLED controller! 😄

[sick apex]

yeah i was gunna do that

well that's what the 2 meters was for

i wanted to build a bluetooth speaker with LEDs on them and stuff

i think a 240 hertz duel core processor could handle running a BT speaker and LEDS

if not i'll just use multiple

[sick apex]

i commited a cardinal sin

i played a megadeth solo

using a kirk hammet guitar pick

[fossil dawn]

nice 😄 A Wled lamp is one of those things that I really want to do but then I get way too many way too amitious ideas...

[sick apex]

bro i've been trying to make something with my micro controllers for like 2 months

then i look at the price for the cool stuff

and im like

nah

but i thought i'd buy 2 meters

because it was £13

turns out

its not 2 meters

its 20 meters

for £13

[fossil dawn]

oh wow

[sick apex]

and the LEDs are all controllable with a remote

and an app

so like i can just bootleg my own controller for them

with an ESP32

[fossil dawn]

though, are they individually adressable LEDs?

[sick apex]

well they must be

[fossil dawn]

or RGB with only one colour per strip?

[sick apex]

else you couldn't change them through a remote

[sick apex]

nope

not that

[fossil dawn]

I had an IR remote RGB strip+controller that was only one colour for the entire strip

[sick apex]

this is one of the showcase pictures

and this

[fossil dawn]

wouldn't be the first time some amazon/ebay seller would exaggerate their product :/

[sick apex]

well i guess i'll find out soon

they come in like 2 hours

then again knowing amazon

[fossil dawn]

😄 👍

[sick apex]

it will be like

6 hours

[fossil dawn]

I kinda can't believe that price 😮

But with 20m even if it's only like 30 leds per meter you could do great stuff!

[sick apex]

it doesn't say about the Diodes per meter

[fossil dawn]

well, we'll see 😄

[sick apex]

im not counting them

i also dont have a meter stick

[fossil dawn]

~~just buy another 1m LED strip and use that as a meter stick 😝 ~~

[south light]

Got a link to em at that price?

[sick apex]

https://www.amazon.co.uk/dp/B09GTRV62R?psc=1&ref=ppx_yo2ov_dt_b_product_details

[sick apex]

i'd end up ordering 100 meters

[south light]

Also I have unironically used myself to measure cables

[sick apex]

[sick apex]

i do that

i know that up to my belly button is 1 meter

so i just use my belly button as a measuring tape

[south light]

Number of light sources = 90

So assuming any accuracy to the ad, not very dense

But a very good price, might have to grab some

[sick apex]

wait

90 * 20

1800

what if i made a display

of 90 x 20

[south light]

Nah, they claim 90 across the 20 meters

[sick apex]

out of the LEDs

WHAT

[south light]

Not 90 per meter

[sick apex]

90 LEDS

OVER 20 meters

HUH

[south light]

But looking at the pictures I wouldn't lend much credence to that

Looks like roughly 10-20 per meter in people's reviews

[sick apex]

so what if i made a 1:1 display out of them

20 x 20

[south light]

Folk have done so before

Heck. Pimoroni even sell such a product

[fossil dawn]

Personally, I don't trust these Amazon specs at all 😂. I've seen everything there. From mousepads with 8GB RAM, to toilet paper that requires 16000V and so on

[south light]

Adafruit too probably

16000V, at that point I think it'd be a laxative rather than a cleaning aid

[fossil dawn]

idk what "AI" they have to fill in those specs but it's so often just complete garbage 😆

[south light]

Interested to see what comes because tbf even if it's a solid colour along the strip rather than addressable and only has 90 LEDs, it's not a bad price

If it is addressable then that's a bargain and a half

[fossil dawn]

only annoying thing is that ESP control of non-adressible LEDs is harder as you need a transistor. But maybe you can hack the LED controller that comes with them

[late fulcrum]

The controller that comes with them likely includes a useful power supply as well

[south light]

And the correct transistors

[sick apex]

well i mean there is really nothing that stops me from controlling the LEDs individually

they're all addressable to some degree

cause they can all goto any of 16 million colours (allegedly)

[south light]

That doesn't mean it's addressable

Most of the strips at this price are just 3 power supplies and a ground (or 3 grounds and a single power supply, depends on if it's common cathode or anode)

[sick apex]

oh yeah im thinking of something else

[south light]

All the reds share one channel, greens another, blues another

[sick apex]

yeah i'll just have to look into them once they arrive

[south light]

I should get up and do productive things

But that requires getting up and doing productive things

[sick apex]

those LEDs have arrived and they're like 5 CM apart

so there's about 20 / meter

[late fulcrum]

It should be possible to determine whether they're addressable by looking at the strip. Addressable ones will normally just be the LED packages themselves, with 3 traces (power, ground, and data) between them. Non-addressable ones normally have both LEDs and current limiting resistors, and 4 traces (power, red, green, and blue). There are some other possibilities, but those are the common ones, especially for less-expensive strips.

[sick apex]

there are 4

wait lemme show you

you'll know better than me

[glad ruin]

Those look non-addressable.

[sick apex]

[glad ruin]

They might be RGBW though.

[sick apex]

wdym by that

like RGB and white

[glad ruin]

Yeah

[sick apex]

came with this

and if i ground the pins on the LED i can change the colour

so i'd presume so

[glad ruin]

Yeah definitely non addressable

[sick apex]

drat

they have bluetooth connectivity already so i dont think there is much point in me programming anything to them i'll probably just put them up somewhere

[late fulcrum]

Yeah, one of the traces is marked Vcc, so grounding a lead will turn on that color.

[sick apex]

yeah

it's got a 5 - 24 volt

[sick apex]

is there a way to disable the power LED on an ESP32-C3

without burning it out

[edgy apex]

I'm remixing this project
https://github.com/rpigu-i/rfidsnatcher
Instead of an $85 board with a sim card for sms I'm using a feather with a wifi ap and captive portal to "transmit" the key from device to phone in a way where it can be copied and shared easily, total cost under $30

[sick apex]

or you could write a BT / BLE app

so it connects over bluetooth

and displays on your phone

[edgy apex]

I did that too but i couldn't copy the text

[sick apex]

save it to a text file

and then upload it as a file

instead of plain text

[edgy apex]

I will try some more I'm not all that well versed in ble. The captive portal seems to work well and it's password protected. I want it to not require anything other than a stock phone to use

[sick apex]

fair

[edgy apex]

They are gonna give me access to the GitHub and I'm gonna make a new branch the annoying thing is I ordered the RFID reader "one day" from Amazon 2 days ago and it's saying delivery Thursday 🙄 I wrote all my functions and tested them, I combined my functions with the code so now it's just a waiting game.

[sick apex]

lmfao felt

[sick apex]

would one of these work

[edgy apex]

That's what I'm waiting on but I got a 3 pack for $10

[sick apex]

oh nice

where from

amazon?

[edgy apex]

Yea

[sick apex]

nice

[sick apex]

can you write RFID chips with those

[edgy apex]

I think it's just a reader

[sick apex]

ah

i know you can write them with android phones

[sick apex]

5 for £8

[edgy apex]

I was hoping to have it yesterday and be done today but I was deceived by Amazon

[sick apex]

dw i shown videos of my product doing multiple colours at once

they only do one

i just had to order new breadboards because the ESP32s are like really wide

[sharp nexus]

GUYS I AM IN THE STREAM ROOM IF YOU WANT TO WATCH BRAIN STIMULATOR BUILT

[glad ruin]

Ok, that's taking things too far @sharp nexus. Multiple people, including moderators, have already made it abundantly clear that your brain stimulator project violates the code of conduct here.

[craggy crag]

hello, so this project am working on needs to display some infos on an adafruit tft screen. According to the guidelines, my code supposed to be working but it ain't, so ...HELP ME
https://learn.adafruit.com/adafruit-2-8-tft-touch-shield-v2/adafruit-gfx-library

[fossil dawn]

what exactly doesn't work? Do you get some error message? What do you expect/want to happen? Vs what actually happens?

[craggy crag]

like the screen is just white

meanwhile i can see all the debugging in serial monitor

and have also tested the screen before, it's working

[sick apex]

how can i use my ESP32-C3 as a USB HID device

[fair summit]

sadly, you can't, the ESP32-C3 doesn't have a full USB implementation, only a usb serial one. It's kind of a USB-serial converter on-chip

[sick apex]

bruh

BRUH

omg

i literally had this problem

yesterday

someone here told me the C3

will have it

i brought 3 esp32s

they were bundled and i thought they'd have it

[fair summit]

plain ESP32 also will not

[sick apex]

then they didn't

then i asked and i was told the C3

would have it

im losing my mind

i've spent £40

on chips i cant use for what i wanted to

😭

[fair summit]

was it in this channel that C3 was vetted as regular USB?

[sick apex]

iirc

lemme check

yes

right here

i knew i wasn't going crazy

[fair summit]

I'm sure DJDevon3 is sorry he said that -- he is short on sleep at the moment

[sick apex]

now i have to buy ANOTHER

omg

[sick apex]

can you tell me

which ESP32 board

i can get

that has wifi

and USB HID

please

[fair summit]

ESP32-S2 and ESP32-S3. Are you going to use it for CIrcuitPython or Arduino or something else?

[sick apex]

C++

Arduino probably

wait but the Arduino IDE

shows this

which doesn't happen with the regular ESP32

[fair summit]

S3 can be flaky with some I2C devices that do clock stretching or sleeping. S2 works well, does not have BLE capability.

S3 does have BLE

[sick apex]

who knew the USB protocol would be such a hard thing to get right

[fair summit]

yes, ESP32-C3 has USB CDC, but no other USB

[sick apex]

oh yeah

that's for like

[tardy badger]

C3 with Bluetooth can do Bluetooth HID I believe

[sick apex]

networking

and stuff

[sick apex]

yeah i know but i dont have bluetooth on my PC

[late fulcrum]

If you think USB is hard, wait 'til you start playing with Bluetooth!

[sick apex]

i have

[tardy badger]

Lol

[sick apex]

i've done USB aswell

but i wanted to try it on an ESP32

i've brought 4 ESP32 boards

and none of them have it

[tardy badger]

Bluetooth dongles aren’t expensive if you have a free usb port

[sick apex]

i have loads of them free

my PC has like 12 USB ports

[tardy badger]

Oh nice

I think mine only has.. 8?

[sick apex]

i added a USB card cause i needed some more USB at one point

[fair summit]

you can use all those ESP32y things for Wippersnapper: no-code IoT data collection

[sick apex]

when i had an array of picos

[tardy badger]

3 on the front, 5 on the back

[sick apex]

plugged in at once

[sick apex]

i have 2 on the front and 10 at the back

[fair summit]

https://learn.adafruit.com/quickstart-adafruit-io-wippersnapper/welcome-to-wippersnapper

[sick apex]

i cant even do wifi AP stuff cause my PC doesn't have wifi

only ethernet

omg

i swear

[fair summit]

on your next useless Amazon order, you can get some dongles

[sick apex]

im going insane

[sick apex]

lmfao

[fair summit]

some people think all they need is USB CDC, so they can do serial, and that's enuf for them

[sick apex]

wait

is PS/2

serial

[whole jacinth]

you mean like the keyboard/mouse protocol? it's serial, but not the usual async serial, as i recall

[sick apex]

interesting

also

yes

[late fulcrum]

It's async serial, but not usual async serial

[whole jacinth]

i thought PS/2 had a clock line?

[sick apex]

maybe i could mess around with it and make it emulate a PS/2 keyboard

[fair summit]

https://docs.circuitpython.org/en/latest/shared-bindings/ps2io/index.html

[fossil dawn]

Idea: RP2040 PIO PS/2 emulation

[late fulcrum]

You may be right, it may be synchronous serial. I remembered it was open collector or something (I remember placing 7407 chips or something like that back in the day)

[fossil dawn]

https://github.com/No0ne/ps2pico of course it's already done 😆

[ebon dew]

nope just ignorance, i thought the c3 had it too. also probably not a good idea to use shorthand like that. when i say s2 or s3 i always specifically mean the Adafruit ESP32-S2 (QT Py or Feather) or Adafruit ESP32-S3 (QT Py or Feather).

there are so many boards out there named s2, s3, and pico now that you really do have to be very specific.

but you're not wrong about the sleep too, i'm always short on sleep lately. life throws curve balls sometimes.

[fair summit]

np! take care

[clever reef]

welcome to the world of prototyping

ive spent well over $250 on my project

[sick apex]

lmfao i got the wrong board 4 times

it would have been cheaper if i'd have created my own board had it made in a mf factory

[clever reef]

what are you trying to make if you dont minfd mr asking

[sick apex]

im trying to write some software to mimic some of hak5's tools

because no chance if im buying any of them

they're very expensive

[clever reef]

make sure you use your powers for good

[sick apex]

im using them for me

i dont do anything with them

i just make them to prove that i can make them

[late fulcrum]

One time, I wrote a program to create a custom footprint for a module. I printed the board out 1:1 and verified all the pads lined up and fit. However, 3 sides were numbered correctly, but one side was numbered backwards. $2000 worth of assembled boards were wrong. Oooooops.

[sick apex]

AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

i'd cry

i'd literally cry

wait, can someone give me a spec sheet for the ESP32's wifi module

or can you tell me if it has monitoring mode

[late fulcrum]

Time for bodge wires!

There was an additional problem where I had specified a "reverse" USB connector, but the assembly house didn't have them in stock, so they soldered on the standard ones, which switched all the pins around. More bodge wires.

[clever reef]

i once ordered a pcb and messed up the dimensions on the gerber files. it was supposed to be 6 in by 8 in. I put it as cm.

i ordered 50.

[sick apex]

😭

[clever reef]

luckily I explained what happened and they changed it for free and didnt charge me for the 50 boards i messed up

there needs to be a word for the anxiety that happens when you order a PCB and hope that you got everything right on the cad

[sick apex]

PT-PCB-D

Pre Traumatic PCB Disorder

[glad ruin]

Or just plain OCD.

[sick apex]

or that

[raw jasper]

(read in US medical ad voice) Working with any form of computers may have side effects, which may include: Notions of paranoia, obsessive compulsions, sudden belief in the occult, and/or visions

[sick apex]

i am losing my mind

i have just spent the last

30 minutes trying to make my Pico show as a mass storage device using the arduino SDK

when it turns out

i can add a build flag in platformio

that will do it for me

😭

[raw jasper]

....does the pico have usb host o_o

[fossil dawn]

which one? 😮

[raw jasper]

I honestly did not know

[sick apex]

build_flags =
-DARDUINO_USB_MSC_ON_BOOT=1

apparently that works

[sick apex]

yes

[fossil dawn]

host and client. USB 1.1 "officially" (on the micro-USB connector on the pico boards) and 2.0 on GPIO using cursed PIO code

[sick apex]

the pico is a nice board tbf

[raw jasper]

Woah. 👻

[fossil dawn]

https://www.adafruit.com/product/5723

I think that uses native 1.1 USB for the Type-c and the PIO for the A

[raw jasper]

huh

well, nice!

thx for letting me know!

[fossil dawn]

But if you want to do something, check before buying if Adafruit TinyUSB or the native SDK tinyusb supports it 😄

[raw jasper]

knowing me, I'd probably get some Chinese board and make figuring it out a project of its own

I find that more rewarding than actually building something with them lol

[fossil dawn]

if you figure anything out, plz make a pull request to arduino-pico (if applicable) 😄

(great core, I always need to advertise it)

[raw jasper]

I'm thinking of getting a new fpga devboard

[glad ruin]

I'm kind of the opposite here. I see development boards as tools, and I want my tools to function the way they are supposed to.

[sick apex]

i dont know if i understand this very much but can someone explain why there is 127 mb of free storage here

but there is only 2 mb of flash

[raw jasper]

I said that in the context of a hobby project, in a "buying IKEA furniture and putting them together" sense. I obviously only get well-documented and known-working boards for things that are actually important.

[late fulcrum]

In general, or one in particular (like skerr's)?

[glad ruin]

Probably has to do with the way it enumerates itself as a filesystem to the OS. It's not like you are copying a file there directly.

[raw jasper]

I'm thinking of getting a board supported by the open-source toolchain (yosys->nextpnr) to play around with and see what it can do

[tardy badger]

It’s going to be a bit before I can sell in the EU. I have to do testing for DoC for CE and UKCA

[glad ruin]

I know who to ask for recommendations.

[raw jasper]

I'd appreciate any recommendations tbh

[tardy badger]

I can self certify but I still need to document those things

[olive dome]

Because RP2040 is using internal mask rom for usb bootloader, so given that it is fixed on the chip, the way to support different size of flash is to just simulate a large enough disk for them.

[clever reef]

there is a lot of lag with the rp2040 when using it as a HID

ive found around 500ms depending on the application

[raw jasper]

Most Chinese vendors with proper CE certification I've seen use an external certification bureau. I dunno why, but they do it. Obviously, more resources etc

But perhaps there's something inherent in the process of self-cert that opens you up to too much legal risk/liability?

[tardy badger]

No more than using a certification house

It still falls on the manufacturer to product documentation proving conformity

[raw jasper]

I dunno, it might be best to save up and go for a proper cert house when you already have income stream from said boards to make sure you conform to all.... the paperwork

[tardy badger]

RoHS is easy because you can just show all your parts are certified RoHS. Low Voltage and EMI is more difficult

But still doable

[raw jasper]

Yeah, RoHS isn't too bad. Probably. IANAL. OTOH, I remember watching a Chinese factory tour where they had an actual spectrometer to check if their components were contaminated with non-RoHS-compliant ones, which was something

[glad ruin]

Glad to hear you aren't anal.

[sick apex]

BAHAHA I GOT BANNED FROM A SERVER

😭

#include "PluggableUSBHID.h"
#include "USBKeyboard.h"

USBKeyboard Keyboard;

void setup() {
}

void loop() {
  delay(1000);

  Keyboard.printf("Hello world\n\r");
}```

[raw jasper]

lol

[sick apex]

i plugged this in whilst talking

and 😭

it just like

went ham and i didn't notice

[raw jasper]

oh. I can see how that would happen

[sick apex]

it must have sent it about 50 times 😭

i added the delay after

[raw jasper]

just tell them you have a literate cat

[sick apex]

LMFAO

fr

Hello world

[raw jasper]

https://tenor.com/view/kitten-keybo-lap-gif-19489640

[sick apex]

Hello world

Hello world

[fossil dawn]

7ban @sick apex

[sick apex]

i forgot to hit the bootsel button

😭

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

lmfao

[fair summit]

It is a fake drive. It size does not represent what an actually be stored in flash.

[sick apex]

ty

[sick apex]

sir/ ma'am, i just had mine writing almost 200 words per second

[fossil dawn]

delay != data rate

[sick apex]

it happened instantly

the second i plugged it in

it crashed notepad

[fossil dawn]

lmao

[sick apex]

and crashed discord

[clever reef]

i had mine sending and recieving information from a video game that was writen in 3 different languages

so it lagged

[sick apex]

fair

[fossil dawn]

I managed to completely overload the serial monitor VS code extension with Serial.println() 😆

[sick apex]

lmfao

im using platformio

its pretty good

[fossil dawn]

same

[sick apex]

idk if you guys use it

yeah

its great

i love vs code anyways

and being able to write C++ in it

[fossil dawn]

there are some things I don't like

[sick apex]

for my controllers is great

[sick apex]

i dont like the library manager

it doesn't work half the time

[glad ruin]

This is not hard to do.

[fossil dawn]

I feel like it just randomly crashes and does weird stuff

[sick apex]

its useful but it gets annoying

mine doesn't

unless you try and write 200 words per second

is there a way to detect what operating system you're plugged into?

with arduino hid code

[fossil dawn]

weird things:

1. Other serial monitor programs (including the one in Platformio) work correctly and don't get overwhelmed
2. The microsoft dev I reported the issue to, can't reproduce it

I feel like the Serial Monitor VSCode extension has particularly bad performance

[glad ruin]

No, and I believe this is part of the design.

[sick apex]

how do hak5 do it then

that's impressive

[fossil dawn]

just integrate a keylogger and look for the following key sequence:
"I use arch btw"

[sick apex]

lmfao

[glad ruin]

I'm speaking in general. 115200 baud is capable of writing 14400 characters per second.

[glad ruin]

I do use Arch.

[raw jasper]

I use the arch wiki

[sick apex]

does a HID device set the polling rate or does the desktop

for USB

[fossil dawn]

void loop(){
Serial.println(LineWith80Characters);
}

Platformio Serial Monitor could handle that. VS-Code built up so much delay that I could unplug the pico and 5 minutes later it would still display "new" lines 😆

[glad ruin]

USB devices can say what they are capable of, but ultimately decisions like that are made by the OS.

[raw jasper]

Do you mind if I ask why? I set up arch from "scratch" in a VM 7-something years ago, but haven't touched it since or beyond that, so I'm genuinely curious

[glad ruin]

orangecrab and icebreaker from 1bitsquared are both good choices.

[sick apex]

alright because if i dont want any funky business happening where it misstypes because its not being polled correctly

then i need to figure it out

time to read 650 pages of the USB standard

[raw jasper]

thanks!

[glad ruin]

It lets me configure the system the way I want and doesn't come with a bunch of crap preinstalled. Also it is run by a community rather than a corporation, plus the package repositories are large and up to date.

[raw jasper]

Makes sense. It's still rolling-release, right?

[glad ruin]

Yeah, always has been.

[raw jasper]

How do they manage not to have updates break the systems?

[glad ruin]

Testing

[raw jasper]

thanks! I might give arch another try once I have the time

[sick apex]

i ordered 3 bread boards because my current one is too small

im right in thinking i can just stick them together and it'll be fine right

like i can use one bread board for one side of my micro controller

and another for the other side

[glad ruin]

True story: I once spent 6 hours debugging why one port on an MCP23017 was not lighting up LEDs, even though the voltages were correct when I probed them. The culprit? The pins on that side of the IC managed to curl under the IC bar in the middle of the breadboard without making contact.

[sick apex]

😭

poor you

i feel your pain

im gunna stick all 4 of my esp boards together to make an 8 core processor

see if i can do anything cool

[glad ruin]

They will act as 4 independent dual-core processors rather than a single 8-core processor since they won't share any memory.

[sick apex]

i know im thinking of something like how kubernetes works

i'll have my pico as a master node that gives each of the esps

a job to do

then it will return the data back to the pico

i dont know if that would work too well

but like if you know what i mean

so like i could have an LCD display linked up to one of them

which processes the graphics

it wouldn't be memory efficient at all but it could work

[glad ruin]

Yeah, I see what you're saying. Your bottleneck will likely be bandwidth unless they also communicate with each other over Ethernet.

[sick apex]

well realistically they could all join on a wifi network

one hosts a wifi network

they're all wifi capable boards

[glad ruin]

Or just connect them all to a single router.

[sick apex]

i have a spare router somewhere

[fair summit]

you could use ESP-NOW

[sick apex]

i know buit i like making my own things

i wont use it

i just like making things

yk what i mean right

[glad ruin]

Personally I would really like to see a low cost ESP-like board that supports PoE. WiFi just isn't reliable enough a lot of the time, and it would also solve the problem of power distribution.

[sick apex]

do the esp32s support ethernet

[raw jasper]

i remember somebody once made a "cluster" using atmegas

[sick apex]

lmfao

there are esp32 boards that have 4 processors on them

[glad ruin]

Not sure.

[sick apex]

i suppose they probably bypass the system memory and use an onboard chip

i could buy a memory chip and write some code that makes it use that instead but thats a whole other thing

[raw jasper]

https://hackaday.com/2013/06/24/16-core-computer-made-of-atmegas/

[sick apex]

writing a hal for an external ram chip seems like too much work

[raw jasper]

found it

[sick apex]

that's amazing

i love it

[tardy badger]

The P4 has Ethernet peripheral I believe

Yup

So that’s an option since it will support ESP-NOW

My guess is this chip will got for $5 a single

[sick apex]

well its certainly possible to make them work together

[tardy badger]

There is also this from Omilex https://www.digikey.com/en/products/detail/ESP32-POE-EA/10258721

[sick apex]

ignore the setup, it'll be better with my other bread boards tomorrow

for now we do with what we have

now i need to count my GPIO pins and divvy them up accordingly

[glad ruin]

That's cheap if it actually functions properly.

[sick apex]

im an idiot

i didn't know the LED had its own pin

well i've linked the reset buttons up to eachother

[tardy badger]

I certainly hope it doesn’t get plagued with some of the issues that the S3 has had

[raw jasper]

Having never used an esp232, I'm surprised at how much effort they seem to be putting in developing a brand identity through the design of their datasheets, diagrams, etc

[tardy badger]

I’m honestly surprised that they used Tensilica IP outside of FPGA

[raw jasper]

I mean, doesn't cadence own tensilica?

[tardy badger]

It was made to be a soft core for FPGA applications and Espressif used it for physical silicon

[raw jasper]

I'd be surprised if they don't have a hard variant

[tardy badger]

As far as I can google, there has been no broad product usage of Tensilica outside of Espressif

[raw jasper]

I wonder who uses WDC's IP cores....

[tardy badger]

It’s been used in a few ASICs for defense but not broadly available (Tensilica)

[glad ruin]

A lot of the devices using it probably don't advertise the fact that they are using it.

[tardy badger]

From my understanding it was primarily developed for defense applications

From Wikipedia

It seems it’s mostly licensed for DSP cores

The HoloLens usage actually is intriguing to me

[olive dome]

Imagine ESP got cut off from Cadence because of security reasons.

[glad ruin]

Hmm probably did.

[olive dome]

Cadence HiFi series DSP usage is pretty broad, even Intel uses them for audio codec DSP

https://edc.intel.com/content/www/xl/es/design/ipla/software-development-platforms/client/platforms/tiger-lake-mobile-y/intel-500-series-chipset-family-on-package-platform-controller-hub-datasheet-v/006/audio-dsp-capabilities/

Tensilica CPU cores are mostly used within the SoC to control some parts of the SoC IP block

So you probably won't see that on the spec or even able to run code on them

[raw jasper]

Now I'm wondering what happened to realtek's audio DSPs

there was a time when almost every second PC had the crab logo icon on their taskbar

[tardy badger]

They’re still widely used, but I believe it’s moved more to the mobile audio space

[olive dome]

https://www.cadence.com/en_US/home/company/newsroom/press-releases/pr/2013/realteklicensescadencestensilicahifiaudiovoicedspipcore.html

[tardy badger]

lots to do still, but it's a start.

this is a "let's push the limits of JLC 6L service" design 😛

also, push the limits of my own capabilities design.

I still need to length match and stuff and run power, design the power supplies and stuff

[raw jasper]

is this a new lattice devboard?

[tardy badger]

Nah

I.MX8 Nano with 1GB DDR3L memory

[raw jasper]

And so, the circle of life is complete :P

[raw jasper]

So, a tiny ARM board

[tardy badger]

Yeah, mostly just wanting to make something that posts and can output over HDMI or MIPI

Some usable gpio

[raw jasper]

Where will you find the DDR3 memory IC?