WiFi + MQTT dongle for Mitsubishi Ecodan

@ajdunlop I will make some time to provide as much detail as I can. It’s one of those that I would describe as daunting until you’ve done it (if you know what I mean). I’ll start by providing a list of required hardware and follow up with some instructions/pictures of one of my assembled modules (warning its not a consumer level finished product!).

As an aside I noticed that there is someone on ebay selling a very neat looking MQTT dongle which could also be worth a look if you don’t fancy getting your soldering iron out Mitsubishi Ecodan WiFi Connector to MQTT for Heat Pump | eBay