Adding Fine Offset WH25 and Fine Offset WH51 to SDR SENSOR MAP

[Richard Horobin]

My SDR-based weewx installation works, and now I want to add two more sensors. Could you please help?

Question. I cannot find the correct device names to go into the [[SENSOR MAP]].  I stopped weewx, ran SDR.PY and looked for PARSED output, but saw none.

Possibility A: SDR.PY contains the relevant parts, but I must do something else to get it to work.

Possibility B: SDR.PY does not yet contain the relevant parts.

Possibility C: Something else, about which I am totally unaware.

Background Info:

Currently, the [[SENSOR MAP]] has input from an Acurite5n1 and an AmbientWH31.  Here is the SDR.PY output, showing that it produces the PARSED output for R 40.

PYTHONPATH=/usr/share/weewx python /usr/share/weewx/user/sdr.py --cmd="rtl_433 -M utc -F json -R 40"

out:[u'{"time" : "2020-05-06 07:45:14", "model" : "Acurite-5n1", "subtype" : 49, "id" : 1030, "channel" : "A", "sequence_num" : 0, "battery_ok" : 1, "wind_avg_km_h" : 3.483, "wind_dir_deg" : 22.500, "rain_in" : 9.580, "mic" : "CHECKSUM"}\n', u'{"time" : "2020-05-06 07:45:14", "model" : "Acurite-5n1", "subtype" : 49, "id" : 1030, "channel" : "A", "sequence_num" : 1, "battery_ok" : 1, "wind_avg_km_h" : 3.483, "wind_dir_deg" : 22.500, "rain_in" : 9.580, "mic" : "CHECKSUM"}\n', u'{"time" : "2020-05-06 07:45:14", "model" : "Acurite-5n1", "subtype" : 49, "id" : 1030, "channel" : "A", "sequence_num" : 2, "battery_ok" : 1, "wind_avg_km_h" : 3.483, "wind_dir_deg" : 22.500, "rain_in" : 9.580, "mic" : "CHECKSUM"}\n']

parsed: {'snr.0406.Acurite5n1PacketV2': None, 'noise.0406.Acurite5n1PacketV2': None, 'freq.0406.Acurite5n1PacketV2': None, 'mod.0406.Acurite5n1PacketV2': None, 'sequence_num.0406.Acurite5n1PacketV2': 0, 'model.0406.Acurite5n1PacketV2': u'Acurite-5n1', 'protocol.0406.Acurite5n1PacketV2': None, 'dateTime': 1588751114, 'wind_speed.0406.Acurite5n1PacketV2': 3.483, 'channel.0406.Acurite5n1PacketV2': u'A', 'msg_type.0406.Acurite5n1PacketV2': 49, 'wind_dir.0406.Acurite5n1PacketV2': 22.5, 'rssi.0406.Acurite5n1PacketV2': None, 'battery.0406.Acurite5n1PacketV2': 1, 'usUnits': 1}

I've used rtl_433 to find the hex address of the new devices, converted them to decimal, and used the rtl_433 readme file to choose the -R values:  WH25 corresponds to R 78 and WH51 corresponds to R 142.

When I run sdr.py as per instructions, it produces OUT lines for these two R values, but it does not produce PARSED lines.

Soil Moisture Probe (WH51):

PYTHONPATH=/usr/share/weewx python /usr/share/weewx/user/sdr.py --cmd="rtl_433 -M utc -F json -R 142"

out:[u'{"time" : "2020-05-06 07:37:23", "model" : "Fineoffset-WH51", "id" : "00ca01", "battery_ok" : 1.222, "battery_mV" : 1800, "moisture" : 0, "boost" : 7, "ad_raw" : 16, "mic" : "CRC"}\n', u'{"time" : "2020-05-06 07:37:23", "model" : "Fineoffset-WH51", "id" : "00ca01", "battery_ok" : 1.222, "battery_mV" : 1800, "moisture" : 0, "boost" : 7, "ad_raw" : 16, "mic" : "CRC"}\n']

out:[u'{"time" : "2020-05-06 07:37:33", "model" : "Fineoffset-WH51", "id" : "00ca01", "battery_ok" : 1.222, "battery_mV" : 1800, "moisture" : 0, "boost" : 6, "ad_raw" : 16, "mic" : "CRC"}\n']

Temperature, Humidity, Pressure (WH25):

PYTHONPATH=/usr/share/weewx python /usr/share/weewx/user/sdr.py --cmd="rtl_433 -M utc -F json -R 78"

out:[u'{"time" : "2020-05-06 07:40:58", "model" : "Fineoffset-WH25", "id" : 98, "battery_ok" : 1, "temperature_C" : 19.500, "humidity" : 57, "pressure_hPa" : 6553.500, "mic" : "CRC"}\n']

out:[u'{"time" : "2020-05-06 07:42:02", "model" : "Fineoffset-WH25", "id" : 98, "battery_ok" : 1, "temperature_C" : 19.500, "humidity" : 57, "pressure_hPa" : 6553.500, "mic" : "CRC"}\n']

I have attached: 

weewx.20200506.amended.text which is a renamed copy of weewx.conf.  It contains a draft SENSOR MAP.

Syslog 1000.text which contains two or three starts of weexw.

Syslog 1000 subset with sdr.text which contains syslog lines that refer to SDR.

[Allen Wilson]

I just set this up yesterday, It's an issue with the way the sdr.py parses the output of rtl_433. The author of rtl_433 has changed the names 'model:' of the decoded msgs, maybe other stuff as well. The parsers will need to be updated for sdr.py.

There is a simple solution to get it working for now, add  '-M oldmodel' to the cmd=rtl_433 line in weewx.conf

[Richard Horobin]

So the keyword is 

-M oldmodel

OK, thanks, I will try that.

[Richard Horobin]

Allen Wilson, many thanks.  

1. -M oldmodel enabled me to add WH25
2. It didn't help with WH51. No parsed output for the soil moisture sensor.
1. However, the output had a different value for ad_raw, which changed from 16 to 19.
2. Now I will go over to RTL_433 forums to see what may have happened.

[Allen Wilson]

Glad, it helped with the wh25.

I had the problem with the fine offest wh25 and wh24 and after some digging realized the problem is with the weewx-sdr module not parsing the output of rtl_433 after rtl_433 programmer made his changes.

The problem you're having is with the weewx.sdr module is not parsing the wh51 data that is being decoded by the rtl_433 program. You should check with the weewx.sdr people to see if they can add WH51 parsing to their program.

Looks like the  -M oldmodel parameter is going away soon. Maybe the weewx-sdr people can update the sdr.py to include the FO wh25 and wh24 as well. ;)

Good luck