MicroPython Forum

pythoncoder

still applies . Given that the ESP32 runs FreeRTOS this is probably the most efficient way to use its two cores. In general threading and Python don't coexist too well because of the GIL: this limits the benefit of running on multiple cores. If there is a single Python runtime, threads can cause ea...

pythoncoder

I would draw a distinction between absolute and relative accuracy. NTP provides absolute time, but because of transport latency it is hard to get better than 1s accuracy. I believe there are ways, but it's specialist stuff. GPS may be easier. But absolute time to μs level is a laboratory grade requi...

pythoncoder

The day of the year calculation interests me. It works, but its logic eludes me. This is perhaps easier to follow:

Code: Select all

t = time.mktime((year, month, day, 0, 0, 0, 0, 0))
t0 = time.mktime((year, 1, 1,  0, 0, 0, 0, 0))  # Jan 1st
day_of_year = 1 + (t - t0)//(24*3600)  # Jan 1st is day 1

pythoncoder

Aside from the fact that this line is clearly wrong print("Wind Speed = %.2f") %WS1 I can't see how this code is supposed to work. You have declared a pin wind_speed_sensor but nowhere do you actually use it. There are two issues you need to grasp to get this working, namely contact bounce and concu...

pythoncoder

I use

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esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash --flash_size=detect -fm dio 0 build-GENERIC/firmware-combined.bin

The dio may take other values depending on the make of board. I have needed dout on some boards. A forum search may throw up other options.

pythoncoder

shaoziyang wrote: ↑
Sat Feb 20, 2021 1:08 am
...It appears to be caused by the print function, this problem only appear on PICO.

Interesting. There seem to be a number of issues around the Pico USB interface.

pythoncoder

I thought it was worth drawing attention to this as it's a significant enhancement. Thanks to @jimmo uasyncio has an official thread safe way to interface with code such as interrupt service routines and code running in another thread. This is documented here . I have also updated my tutorial with s...

pythoncoder

That firmware is very out of date. As far as I know the Loboris port was abandoned long ago.

pythoncoder

See https://github.com/peterhinch/micropython_ir.

pythoncoder

See example code here.

MicroPython Forum

Search found 4914 matches

Re: multi-threading question

Re: NTP accuracy on ESP8266

Re: Astral port/alternative

Re: Wind Speed?

Re: Frozen modules attempt failed

Re: mandelbrot calculation and strange behavior in PICO

New uasyncio feature: ThreadSafeFlag

Re: I am looking for a solution for _thread in class object

Re: IR receiver/transmitter for ESP32?

Re: uasyncio lock not working