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13% OFF Sensor externo sem fio DG-R8X 433MHz para estação meteorológica TH8868 TH8988 US$13.99 US$15.99 View It

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MikeG65 04/10/2021

Very good sensor. Works well with RTL_433 (reports as a "Nexus-TH"). There is no switch to select the channel but the PCB has holes for one so you can either add a switch or hard-wire it. This will void the guarantee so only try this if you know what you're doing. It isn't really necessary to add a channel option since the sensor also sends another code (reported by RTL_433 as "House Code") which can be used to identify it from the others on the same channel. I pipe the output to MQTT & Node-RED and it works perfectly.

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BG145111842 The “house code” is rolling though, so it changes every time you change the battery on this. Not a reliable way to differentiate different sensors on the same channel, so you need the channel. Ideally, the house code should have been burned into the chip like it is on many other 433MHz devices so it wouldn’t change when changing batteries.
Resposta 06/12/2021

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