This simple system is based on the Adafruit Feather 32u4 RFM95 board.
It is designed to be battery powered and placed in the pool-skimmer.
pH, Orp, Water temperature and battery level are measured, averaged and periodically published to the TTN servers over LoraWan protocol.
The system current consumption is <10mA. A decent size power-bank (ie. USB and 5V supply) should let the system run for several weeks.
- A TupperWare which fits into your skimmer!
- Adafruit Feather 32u4 with LoRa Radio Module
- Phidgets PH/ORB amplifier modules
Home automation integration example (JEEDOM)