there was a response to my request in the forum..
and hw & sw basics done..

with the links to

i have created a new repository for my cp_reflow_controller
with this example on hand i will use a adafruit PyBadge as main controller – and use the EZ-Make-Oven as inspiration how to design the software… (all the parts i have on hand are a little bit different….)

As temperature sensor i use the Adafruit MAX31855 Thermocouple breakout board

parts have arrived and i have build the hw:

and over the holidays i also have done the firmware:

and just *along the way* written a CircuitPython library for nonblocking user input

with this setup i can experiment with the PID…