MicroPython Forum (Archive)

I had perfectly good code addressing an I2C device, then it start raising the "OSError: [Errno 19] ENODEV". After pulling this code asunder I eventually discovered that my I2C device wasn't responding or had come off the I2C bus. Reconnecting it solved the problem. I seems that this error is thrown ...

Just looking at the D1 Mini, it seems doable to cut the track from the CH340 to the 470 R resistor and insert a schottky diode.

Thanks for that. Given this serial port limitation on the ESP8266 and also the difficulty (I think) in getting IR Tx and RX working under Micropython I was thinking of building another board with Arduino acting as an I2C slave and carrying out these "difficult" functions.

I have a Grove MP3 V2 module that connects to the ESP8266 via a serial connection on the TX and RX pins. After a late night and pulling out the last few strands of my hair, the following morning I got to grips with why the ESP8266 was apparently being bricked and not responding to the REPL. The prog...

This works great on my home laptop (Win 8.1) but when I tried it on the students' Win 7 machines it doesn't work. Seems to be something different going on at the DOS level. Anyway I made a grand improvement that does work. My Project has a workspace folder with a globals folder in this so I have a p...

I use Notepad++ for editing, ampy for downloading and Tera Term for serial terminal. In Notepad++ I use NPPExec to execute the following commands: NPP_SAVE ampy --port COM4 put $(FULL_CURRENT_PATH) reset.bat exit The file is first saved, then downloaded via COM4. The reset.bat file sends a Ctrl-D to...

Thanks Peter, I actually started to do that on my Linux Mint machine but hit a few more hurdles. I'll google my way through those hopefully. I resolved the situation for now by removing one of the modules. The overall project is a demo of the board's facilities and I suppose in practice my students ...

I'm trying to get into frozen modules. It seems to be quite a task given that you need to use Virtual Box, GIT, and Vagrant. Is there any simpler way? I would be satisfied with .mpy files because I seem to be up against the blocks with my source code size and compiling on the esp8266. This the Vagra...

My board is my own design development board using the Wemos Node D1 Mini. It has LCD, LEDS, Switches, RGB, Temperature Sensor, LDR, Speaker, Motor H-Bridge. I use it to teach microcontrollers. The demo software runs a menu system to demonstrate each of these sensors according to the users’ choice. T...

I am using the bme280_float library. The bme280.altitude property sometimes takes different times to complete and it seems random (8 - 80mS). Anyone notice this before? while True: a = ticks_ms() print ((accelerometer.get_values()['AcX']) / 4096) print (ticks_ms() - a) print (bme280.altitude) print ...