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NorthernMan54 / rtl_433_ESP

Trial port of the rtl_433 Library for use with OpenMQTTGateway on a ESP32 and a CC1101 Transceiver
GNU General Public License v3.0
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Cannot get any 868 MHz signals #139

Open fir3drag0n opened 6 months ago

fir3drag0n commented 6 months ago

Current Situation

I recently purchased a Liligo gateway (868 MHz) and flashed it with openmqttgateway. And I set it to 868 MHz to receive my wh51 moisture sensors, but I cannot detect any signals. I flashed openmqttgateway fsk and set the frequency. Sometimes I am able to receive an acurite device, but not my moisture sensors. Is there any trick to get those signals?

I already set the frequency in openmqttgateway frontend to 868.3 MHz, but I do receive nothing. I even tried another antenna and put the wh51 device next to the Liligo gateway, but even then I don't receive the signals. I tried 3 wh51 sensors, but nothing.

Any help is appreciated!

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DigiH commented 6 months ago

I already set the frequency in openmqttgateway frontend to 868.3 MHz, but I do receive nothing.

Hi @fir3drag0n

Try setting the frequency to 868.35 MHz - are you getting anything then?

fir3drag0n commented 6 months ago

I already set the frequency in openmqttgateway frontend to 868.3 MHz, but I do receive nothing.

Hi @fir3drag0n

Try setting the frequency to 868.35 MHz - are you getting anything then?

That was it. Thank you! But how do I know which frequency I have to set?

DigiH commented 6 months ago

This is a trial and error situation and also a community effort. With Fine Offset and its re-branded Froggit, Ecowitt, Ambient Weather etc. devices the sweet spot has been found to be 868.35 MHz. With other devices users will currently have to tweak the frequency and test which setting will work for those.

fir3drag0n commented 6 months ago

Is there a database or something else where I can see which frequency the devices will work on?

DigiH commented 6 months ago

No database as of yet, but it would also require for users with all the different devices to do frequency range testing and submitting the results.

Currently the best exchange for reception experiences with OMG with rtl_433_ESPis the OMG/Theengs community forum.

Entropy512 commented 5 months ago

The original SDR-based rtl_433 will print the frequency if you use the -M level option, that's how I fed https://github.com/Entropy512/r900_esphome/blob/main/analyze_hopseq.py - although by default it only prints one decimal place. I had to change that by modifying the source code.

It does appear to print out in higher precision if you use the CSV export without modification.