As a BLE device, PinecilV2 and some other IronOS devices offer both sensors and controls off-device.
Someone has made a (sensor-only) Bluetooth setup for the Pinecil, but it’d be nice to have it in core HA as a proxy-able component, along with the ability to change settings from a HA dashboard.
Oh look, someone read my mind!
Here’s a proxyable BLE integration for Pinecil. With luck and some polish it can make it into core. Until then, it works via HACS, and unlike the ESPHome code above, permits setting temperature.