Freezer open sensor options

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  • rtl_433

    Program to decode radio transmissions from devices on the ISM bands (and other frequencies)

  • They just blast out temp updates every minute or so on 433MHz. A $25ish SDR dongle and rtl_433 picks them up easy. There's output options in rtl_433 for a few different formats, with MQTT being what I use to bring them into HA. You can pull them into Hubitat too, as it sorta supports MQTT, but you'll end up having to write your own DTH in Groovy, which is many times harder than writing a few lines of YAML to accomplish the same thing in HA.

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