rpi-pico-watering-system

Circuit diagram

Data flow

TODO

hardware

make a proof of concept version of the circuit with a breadbord
test adc multiplexer
put everything together inside an electronics box
connect the water tubes circuit

software

figure out data flow between rpi pico and homeassistant with mqtt broker
create data model for mqtt topics
figure out how homeassistant can read data from mqtt and set thresholds for soil moisture and trigger a publish to relay topic that opens the relay for the specific sensor
create micro python script for rpi pico that connects to local wifi and sends to mqtt topics the sensors data
refactor script to use esphome

Setup

rename secrets.py.sample to secrets.py
install umqtt.simple from Thonny package manager
run the main.py script