I’ve added a new page in the applications section of the OpenEnergyMonitor guide on heat pump monitoring: https://guide.openenergymonitor.org/applications/heatpump
It covers 3 levels of monitoring:
- Electricity monitoring using an EmonTx or EmonPi
- Monitoring system temperatures using an EmonTx or EmonPi
- Heat metering, either via pulse counting or via a USB to MBUS reader plugged into a emonPi/emonBase that we will soon be stocking in the shop.
To cover these three topics, I’ve added a page on adding temperature sensors to an emonPi/emonTx:
This page also links to a useful blog by @johncantor with mounting suggestions for pipes https://heatpumps.co.uk/2015/06/08/temperature-sensing-with-openenergymonitor/
Extended pulse counting documentation to cover wired pulse counting:
and added documentation to cover the MBUS EmonHub interfacer to be used with the USB to MBUS reader: https://guide.openenergymonitor.org/integrations/emonhub-interfacers/#mbus-reader-for-electric-and-heat-meters
The EmonHub interfacer documentation also covers interfacing with an SDM120-Modbus single phase electricity meter that is Measuring Instruments Directive (MID) approved. Im using this on the electric feed to my heat pump so that I have both MID metering on the electric supply and heat output of my heat pump: https://guide.openenergymonitor.org/integrations/emonhub-interfacers/#reading-from-a-sdm120-single-phase-meter
The heat pump monitoring application page also links to our heat pump monitor through-hole kit development board, that combines many of these feature in one unit, however it’s probably easier for many users to use an EmonTx/EmonPi configuration with either pulse counting for reading from the heat meter or the soon to be available MBUS reader. We have a limited number of these through-hole boards left and we’ve reduced the price for these in the shop. The intention is to replace this initially with the USB to MBUS reader connected to the emonPi/emonBase and potentially a simple WiFi MBUS reader later. An MBUS reader will also be available on the STM32 hardware.