EN2058 meat thermometer

[nitrag]

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I just got this device and pull some files. Let me know what else is needed.

@lychaxo opened Issue https://github.com/merbanan/rtl_433/issues/1478 a year ago on a similar device

[zuckschwerdt]

Looks like maybe FSK (the EN2052 presumably was OOK), but the signal is exactly centered which makes that hard to see (basically just looks like PSK phase shifts). Can you record a sample at -f 433.98 and another one at -f 434 -s 1M ? Drop the current and new cu8 sample files on https://triq.org/pdv/ to see what's going on. For more discussion and developing a decoder please open an issue at rtl_433.

[nitrag]

@zuckschwerdt I think I've got it. 433.88 Mhz. Can you confirm this is the data I need to figure out how to decode?

https://github.com/merbanan/rtl_433_tests/pull/400/files#diff-6d25cdaf58c38a95d44ed59513390d392cb2ca96b7b0c5e61c181b8701f69d0dR53

[zuckschwerdt]

Yes, that looks ok. FSK PCM with 100 µs bit width. Use -X 'n=EN2058,m=FSK_PCM,s=100,l=100,g=1200,r=2000' It is strange that you had to hit one of the FSK freq dead on. Usually not what you want to do. The 15 zeros (1500µs space) at the start are part of the sync, so I assume the 15 zeros in the middle aren't data. The output looks consisten and there is a counter and maybe a checksum (add/xor) at the end:

aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8b0b9 11 1000
aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8b0b9 21 2000
aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8b0b9 31 3000
aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8b0b9 41 4000
aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8b0b9 51 5000
aaaaaaaaaacaca5441cc0eba00c80a3c00c8aa55000 8101820283038404880889098a0a8

Try to get more data and look for fields that change according to temperature.

Open an issue at rtl_433 and link or copy this.

[zuckschwerdt]

This BitBench show some pattern to the data.