Heart-Light

In this repo you can find the source for a MicroPython based WS2812b-Project. The microprozessor running it is the ESP32 (NodeMCU32S to be specific). It also has a bmp280 termperature/pressure sensor and 2 pushbuttons for switching the animation.

Besides the buttons it can also be controlled via the MQTT. It implements the homie convention (functionality provided by the microhomie library).

Build and use

The case is made from cardboard and put together with loads of hot glue, which look ok, but you can 3D-Print something as well. All LEDs are glued to the walls and the ESP32 on the back. The light diffuser used on the picture is a acrylic sheet but i found white paper to work as well here.

If you have problems while building this and want help, feel free to open up an issue here :)

I use this with OpenHAB and it works wonderfully.

Flashing

Download the MicroPython binary for the ESP32.

On Linux it can be then be flashed via:

esptool.py --chip esp32 erase_flash ;
esptool.py --chip esp32 --port /dev/ttyUSB0 write_flash -z 0x1000  "$(find ~/ -name 'esp32*.bin' | head -n1)"

Edit the settings.py to your liking and put your wifi credentials (seperated by simple newlines) into a file called wifi-credentials on the root of the MicroPython filesystem. Then upload all the .py files and the credentials with rshell or mpfshell for example.