IOT/Controls for hydronic heating & cooling with air-to-water heatpump

zigbee sensors in each room

• temperature, humidity
• zigbee2mqtt writes data to mqtt
• mqtt message broker (mosquito) pushes data to virtual thermostat service

outdoor weather service

• periodically polls external weather api (open-mateo)
• outdoor temperature (current and low/average/high over next 24h) is pushed to controller

• configure heating and cooling setpoints
• view thermostat data via web interface
• receives data from zigbee sensors, records history, pushes data to controller

• receives a summary of current indoor & outdoor conditions
• controls heatpump mode: heating/cooling
• controls zone pumps: on/off
• sends dewpoint temperature to heatpump during cooling
• keeps history of system state, view via web interface

Phidgets relay is used to signal the zone pump via Taco Zone Controller the same way a thermostat would. https://www.phidgets.com/?prodid=720&pcid=39

Navigate to the webpage: http://phidgetsbc.local/cgi-bin/system-logs.sh Access(admin:root)