Hadn’t come across ESP Home before.
So this could either act as a bluetooth extender or somehow convert the bluetooth readings and send to HA over wifi? (This sensor isn’t listed but I see a very similar one and I suspect that is actually using the same hardware)
Pretty painless and once flashed and it has WiFi credentials I just moved it close to the temp sensor, restarted HA and BLE devices were picked up straight away.
Did have one just disappear last night but not sure if that was down to it syncing to my phone so will keep an eye on it.