This is a personal project, and there is no guarantee this will ever work at all
- export CFLAGS=-fcommon
- sudo pip3 install --upgrade RPi.GPIO
- sudo pip3 isntall --upgrade adafruit-blinka
- sudo pip3 install adafruit-circuitpython-charlcd
(potentially might also need sudo pip3 install --upgrade adafruit-python-shell)
This repository contains "stub" files for necessary Python libraries board, busio and adafruit_character_lcd that allows development to happen on a normal computer instead of RPi. The LCD is emulated, and messages are printed on the standard output. Make sure NOT to copy those three directories onto a RPi device
In order to work, the user executing the code should have full permissions on /dev/i2c- devices. By default only root has full access to them, and all other users are denied access.
To allow members of the group alarm write to the i2c devices create file /etc/udev/rules.d/lcd.rules with the following content:
SUBSYSTEM == "i2c-dev", TAG+="systemd", GROUP="alarm", MODE="0660"