I would like to control a heater ( via Solid State Relay) from a Raspberry.
My scenario would be like this
I will start a heater from a "cold" state( heater will have an ambient temperature). The temperature will reach a low temperature limit( say 190 C) and waits for me to start my temperature profile .The profile will be like this: temperature goes to 220 C, wait 20 seconds and goes back to the low temperature limit 190 C.
But the temperature will have to stay at those 190 C( low temperature limit), so the next time I will start the profile , the profile will start again from 190C(low temperature limit), not from the ambient temperature.
Is that possible with only GPIOs of Raspberry ( with using a A/D convertor) or I must use a PLC controller?
Did anyone try anything similar?
Thank you for your feedbacks