MicroPython Forum (Archive)

...Having to smack four spaces in front of code in order for it to present as code in Markdown is just as annoying as using code tags... You don't have to do that in GitHub flavoured markdown. The following will work: ```python def foo(): print('foo') ``` A valid question is whether new users will ...

Ah, sorry. I didn't even know that such a thing was possible.

Writing non-allocating applications is quite difficult. You need to acquire a lot of knowledge about when MP allocates. The way I've done this is to run code fragments in an ISR on a platform that supports hard IRQ's. But in general there is no need to worry unduly about allocation - just let the GC...

See this doc for information on freezing bytecode. Using this technique it is possible to install libraries comprising hundreds of lines of code and to run applications with plenty of free RAM.

The issue isn't the RTC logic on the chip, it's the type of oscillator that drives it. ESP8266 board use an RC oscillator which has poor accuracy owing to component tolerances. Good quality boards use a 32KHz crystal which will give excellent accuracy. STM goes further by enabling the crystal oscill...

Two points. It's worth issuing gc.collect() before taking any measurement of free or allocated RAM. Secondly, your use of threading looks hazardous. I would do the writing as a coroutine. If you must use threads you need a lock to ensure that you don't write out data which is half way through being ...

Hmm. I'm getting no joy at all. According to the docs for my Feather S2 the rx and tx pins are connected to UART 0. However a simple loopback test doesn't work. .any() returns some stupid number. .write(b'hello\n') returns nothing (should return 6). And .read() produces nothing. I tried UART 1: .wri...

The data sent from a keyboard to a PC is a scan code, not a Unicode string. I'm no expert on this - I suggest you Google "keyboard scan code". The conversion to Unicode occurs in the PC. It may be that your PC needs a special driver to convert scan codes to your language.

I suspect there is something wrong with your setup as I have had a test running for two days with an ESP32-S2 running mqtt_as.

Have you checked network connectivity? Can you ping the ESP from a PC? Have you ensured that there is a good quality power source i.e. a short USB lead with low resistance?

Try this: import _thread from time import sleep_ms running = True count = 0 def other(): global count while running: count += 1 sleep_ms(100) def main(): global running print("Running...") _thread.start_new_thread(other, ()) # Tuple of args while count < 100: print(count) sleep_ms(1000) running = Fa...