pico-temp-controller

pid temperature controller using the pi pico.

steps:

learn RTIC, get 2 leds blinking at two different rates, and an led toggling on button press with interrupts.
learn to interface with i2c, print temperature measurements to serial
learn to interface with rotary encoder, print rotation directions to serial.
learn to interface with lcd, print temp measurements and rotation to lcd.
develop pid loop to control solid state relay, with temp from temp sensor and target temp from rotary encoder.