A Raspberry Pi + DHT22 used to monitor temperature and humidity in one of the rooms in KSJ

Uses a D1 Mini and Arduino code with an HTU21D for ambient sensing and two DS18B20 OneWire sensors for inlet and outlet temperature measurement. The derivative of the temperature difference across the heat pump detects the heat pump mode.

Room Einvir

Test channel to receive data from a Cockle

Test channel to receive data from a Cockle

A TiffinTin-Cockle test

Ambient temperature

ESP in deep sleep mode using 2 pcs AA 1.5V batteries. Wakes up and reports to ThingSpeak every 15 minutes to conserve power. DHT-11 & LDR forms the Temp&Humidity and Ambient Light sensors.

Ambient light sensor on Nexus device

The cattle temperature sensor

Arduino data