pH and ORP stamp are using standard serial communication to send data they read from the probe. So I used the SoftwareSerial library to get data processed by the arduino and I connected :
- pH RX & TX pin respectively to pin 2 & 3 on the arduino
- ORP TX & TX pin respectively to pin 5 & 6 on the arduino
Temperature sensor is an analog sensor which I connected to pin A0.
Also, I connected power (3.3V) and ground to respective power lines of sensors.
Test code (which is way more complicated than it should be because I was first planning to use an arduino as the final solution… but then decided to go for a BeagleBone) can be found here : https://github.com/jsiobj/poolDuino