DAVIS VP2 - RTL-SDR Install
ian.r...@gmail.com
Hi all, I would appreciate some guidance please.
I have set up Weewx Wyse5070 machine successfully . I have the simulator and a secondary feed from my Ecowitt also working. MQTT also works.
I have my website and home assistant set up to receive the data.
The final step was to migrate from the simulator to my Davis VP2 – using rtldavis. The dongle is a Blog V3 with TRTL820T tuner. Rtldavis is installed but it isn’t decoding anything. I have confirmed the signal is strong enough and have re-installed rtldavis twice. So the hardware is working. What do I need to do to get this working please?
Rtldavis section of weewx.conf i;
driver = user.rtldavis
cmd = /usr/local/bin/rtldavis
transceiver_frequency =
EU
iss_channel = 1
anemometer_channel = 0
leaf_soil_channel
= 8
temp_hum_1_channel = 0
temp_hum_2_channel =
0
rain_bucket_type = 1
debug_parse = 0
debug_rain =
0
debug_rtld = 3 # rtldavis logging: 1=inf; 2=(1)+data+chan;
3=(2)+pkt
save_pct_good_per_transmitter = False
Output from this command;
weewxadmin@wyse5070:~$ /usr/local/bin/rtldavis -d 0 -gain 48 -tf EU -tr 1 -v
is:
11:26:30.717902 rtldavis.go VERSION=0.15
11:26:30.718046 tr=1 fc=0 ppm=0 gain=48 maxmissed=51 ex=0 receiveWindow=300 actChan=[0] maxChan=1
11:26:30.718076 undefined=false verbose=true disableAfc=false deviceString=0
11:26:30.718275 BitRate: 19200
11:26:30.718284 SymbolLength: 14
11:26:30.718322 SampleRate: 268800
11:26:30.718330 Preamble: 1100101110001001
11:26:30.718336 PreambleSymbols: 16
11:26:30.718342 PreambleLength: 224
11:26:30.718348 PacketSymbols: 80
11:26:30.718354 PacketLength: 1120
11:26:30.718360 BlockSize: 512
11:26:30.718366 BufferLength: 2048
Found Rafael Micro R820T tuner
11:26:31.167964 tr=0 ch=0 freqCorr=0 lastFreqError=0, freqerrTrChList=[0 0 0 0 0 0 0 0 0 0]
11:26:31.168209 Hop: {ChannelIdx:0 ChannelFreq:868077250 FreqError:0 Transmitter:0}
Exact sample rate is: 268800.001367 Hz
11:26:31.332312 Supported tuner gain: 0 Db 9 Db 14 Db 27 Db 37 Db 77 Db 87 Db 125 Db 144 Db 157 Db 166 Db 197 Db 207 Db 229 Db 254 Db 280 Db 297 Db 328 Db 338 Db 364 Db 372 Db 386 Db 402 Db 421 Db 434 Db 439 Db 445 Db 480 Db 496 Db
11:26:31.353687 SetTunerGain 48 Successful
11:26:31.353774 GetTunerGain: 48 Db
11:26:31.353836 SetFreqCorrection 0 ppm Successful
Allocating 1 zero-copy buffers
11:26:31.358029 Init channels: wait max 17 seconds for a message of each transmitter
11:26:49.296025 Init channels: wait max 17 seconds for a message of each transmitter
11:26:49.296098 tr=0 ch=0 freqCorr=0 lastFreqError=0, freqerrTrChList=[0 0 0 0 0 0 0 0 0 0]
11:26:49.296143 Hop: {ChannelIdx:0 ChannelFreq:868077250 FreqError:0 Transmitter:0}
11:26:49.296215 applied freqCorrection=0
11:27:07.234983 Init channels: wait max 17 seconds for a message of each transmitter
11:27:07.235051 tr=0 ch=0 freqCorr=0 lastFreqError=0, freqerrTrChList=[0 0 0 0 0 0 0 0 0 0]
11:27:07.235097 Hop: {ChannelIdx:0 ChannelFreq:868077250 FreqError:0 Transmitter:0}
11:27:07.235141 applied freqCorrection=0
11:27:25.174001 Init channels: wait max 17 seconds for a message of each transmitter
11:27:25.174133 tr=0 ch=0 freqCorr=0 lastFreqError=0, freqerrTrChList=[0 0 0 0 0 0 0 0 0 0]
11:27:25.174246 Hop: {ChannelIdx:0 ChannelFreq:868077250 FreqError:0 Transmitter:0}
11:27:25.174443 applied freqCorrection=0
gary....@gmail.com
Where did you get the gain value you are using? I see supported gains, then your set gain is not among the listed ones.
11:26:31.332312 Supported tuner gain: 0 Db 9 Db 14 Db 27 Db 37 Db 77 Db 87 Db 125 Db 144 Db 157 Db 166 Db 197 Db 207 Db 229 Db 254 Db 280 Db 297 Db 328 Db 338 Db 364 Db 372 Db 386 Db 402 Db 421 Db 434 Db 439 Db 445 Db 480 Db 496 Db
11:26:31.353687 SetTunerGain 48 Successful
11:26:31.353774 GetTunerGain: 48 Db
$GOPATH/bin/rtldavis -tr 3 -tf US -ppm 78
Why the ppm? I used another tool (lost to history) to determine the value.
So the defaults are used. Note the gain=0
12:19:11.601292 tr=3 fc=0 ppm=78 gain=0 maxmissed=51 ex=0 receiveWindow=300 actChan=[0 1] maxChan=2
12:19:11.601303 undefined=false verbose=false disableAfc=false deviceString=0
12:19:11.601664 BitRate: 19200
12:19:11.601681 SymbolLength: 14
12:19:11.601688 SampleRate: 268800
12:19:11.601695 Preamble: 1100101110001001
12:19:11.601702 PreambleSymbols: 16
12:19:11.601708 PreambleLength: 224
12:19:11.601715 PacketSymbols: 80
12:19:11.601721 PacketLength: 1120
12:19:11.601728 BlockSize: 512
12:19:11.601734 BufferLength: 2048
Found Rafael Micro R820T tuner
Exact sample rate is: 268800.001367 Hz
12:19:12.289561 SetFreqCorrection 78 ppm Successful
12:19:12.293310 Init channels: wait max 139 seconds for a message of each transmitter
12:21:31.418790 Init channels: wait max 139 seconds for a message of each transmitter
12:21:31.418876 Hop: {ChannelIdx:0 ChannelFreq:902419338 FreqError:0 Transmitter:0}
12:22:10.413247 TRANSMITTER 1 SEEN
12:22:30.172183 TRANSMITTER 0 SEEN
12:22:30.172206 ALL TRANSMITTERS SEEN
12:22:30.172362 Hop: {ChannelIdx:36 ChannelFreq:920482355 FreqError:0 Transmitter:1}
12:22:31.413931 8100AAFFC100F95B 1 2 0 0 1 msg.ID=1
12:22:31.414015 Hop: {ChannelIdx:19 ChannelFreq:911952597 FreqError:0 Transmitter:0}
12:22:32.733962 E000008005004F97 2 2 0 0 1 msg.ID=0
12:22:32.734014 Hop: {ChannelIdx:22 ChannelFreq:913457849 FreqError:0 Transmitter:1}
12:22:34.038567 E100AA800100442E 2 3 0 0 1 msg.ID=1
12:22:34.038608 Hop: {ChannelIdx:41 ChannelFreq:922991108 FreqError:0 Transmitter:0}
12:22:35.295761 500000FF7500485B 3 3 0 0 1 msg.ID=0
12:22:35.295800 Hop: {ChannelIdx:3 ChannelFreq:903924589 FreqError:0 Transmitter:1}
12:22:35.297450 duplicate packet: 500000FF7500485B
12:22:36.663357 5100AAFF710043E2 3 4 0 0 1 msg.ID=1
12:22:36.663404 Hop: {ChannelIdx:25 ChannelFreq:914963100 FreqError:0 Transmitter:0}
12:22:37.859423 600000000500A0ED 4 4 0 0 1 msg.ID=0
12:22:37.859477 Hop: {ChannelIdx:29 ChannelFreq:916970102 FreqError:0 Transmitter:1}
12:22:39.287717 9100AA02011BF7D2 4 5 0 0 1 msg.ID=1
12:22:39.287755 Hop: {ChannelIdx:8 ChannelFreq:906433342 FreqError:0 Transmitter:0}
12:22:39.289846 duplicate packet: 9100AA02011BF7D2
12:22:40.420990 8000002BED00C4F9 5 5 0 0 1 msg.ID=0
12:22:40.421029 Hop: {ChannelIdx:44 ChannelFreq:924496359 FreqError:0 Transmitter:1}
12:22:41.914584 8100AAFFC100F95B 5 6 0 0 1 msg.ID=1
12:22:41.914671 Hop: {ChannelIdx:47 ChannelFreq:926001611 FreqError:0 Transmitter:0}
12:22:42.984938 E000008005004F97 6 6 0 0 1 msg.ID=0
12:22:42.984974 Hop: {ChannelIdx:16 ChannelFreq:910447346 FreqError:0 Transmitter:1}
12:22:44.538867 E100AA800100442E 6 7 0 0 1 msg.ID=1
12:22:44.538909 Hop: {ChannelIdx:32 ChannelFreq:918475353 FreqError:0 Transmitter:0}
12:22:45.546684 500000FF7500485B 7 7 0 0 1 msg.ID=0
12:22:45.546740 Hop: {ChannelIdx:5 ChannelFreq:904928090 FreqError:0 Transmitter:1}