Saturday, December 8, 2012

Writing data to the Denver TRC-1480

One useful aspect of knowing the protocol used by a wireless thermometer would be to add own sensors. The Denver TRC-1480 have three available channels where one could display custom data. It is also possible to buy additional sensors from Denver.

By sending a temperature packet identical to a packet the Denver sensor could have sent one may check how sensitive the Denver decoder are to timing issues.

The test revealed that the decoder only scans for data a few seconds each time it expects a transmission, but once this were addressed the Denver decoder were not very picky about the timing and bits sent.

Sending "01111" as bits 32 - 36 always displayed the intended temperature so the purpose of these bits are somewhat unclear.

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