I create an ORP node (add PH later)
Currently I have 2 ways (ESP with Webserver and MQTT and MySensors).
I publish an early relaese for mysensors on github : https://github.com/fab33/MySORP
Clock with temperature, humidity and CO2 level sensors
An ultrasonic measurement saga finally over...
Irrigation Controller (up to 16 valves with Shift Registers)
Wiring for 2nd Register
Problem with 2nd register heating
SMD Reflow Oven / PID
PiHome - Smart Heating Control Available To download
Battery powered fingerprint reader