MicroPython Forum (Archive)

Hello Jimmo, thank you! I'll try to get some questions I have today, and put there here.

AP

Hello, I am looking for a reference that explains how memory is managed with MicroPython on the ESP8266. I know the basic facts, that my D1 Mini has 4MB of flash and that the ESP8266 has 80KB of RAM. I know that I can check how much heap is available with gc.mem_free(). But I don't really know what ...

I don't have one, but the following page says:

https://revspace.nl/VINDRIKTNING

The datasheet of the PM1006 mentions that it takes 5V as power and communicates using 4.5V levels.

But I guess we can only definitely find our by pocking at the signal.

AP

Hello again, I can confirm that the 1.19.1 firmware patched with SoftUART runs as expected on any of the digital pins. So, Richard, this must be what you described, the sensor can't bring the UART RX to low.

I'll write up a tutorial describing the problem and how to fix it.

Thank you!

AP

I've found the build instructions:
https://github.com/micropython/micropyt ... structions

The Docker approach for the cross compilers mess works like a charm!

AP

I'm trying to compile the latest 1.19.1 with the patch and can't seem to get the environment properly setup with Ubuntu. Do you have a reference I can use with the instruction to compile the ESP8266 firmware please?

Thank you, I'll have a look at the pull request. And yes, both the sensor and the D1 Mini share grounds

Thank you Robert! Let me just replay that to you: the problem is that at a signal level the D1 Mini struggles to communicate with the IKEA sensor. What would be my options then? The repo that I shared in the post manages to solve the problem by using C and a software UART on regular digital pins. Bu...

Hello, I'm trying to add a D1 Mini board to an IKEA Vindriktning air quality sensor using the tutorial at https://github.com/Hypfer/esp8266-vindriktning-particle-sensor . I want to implement it in MicroPython rather than C, like in the repo. I am able to interface the sensor with a Raspberry Pi Zero...

Thank you, I'll give it a go. I really like the Visual Studio Code integration though, it would be a shame if I had to change!

I suspect that the USB link gets into a weird state and the only way to fix it is to power down the board and relink. But I can't find a way to debug it.