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merbanan
Bresser Lightning Sensor.
Hello,
recently i bought mentioned lightning sensor, but not supported yet.
i followed the suggestion by recording sample here is the result.
est mode active. Reading samples from file: g045_868M_1000k.cu8 baseband_demod_FM: low pass filter for 250000 Hz at cutoff 25000 Hz, 40.0 us Detected FSK package @0.088888s Analyzing pulses... Total count: 57, width: 71.66 ms (17915 S) Pulse width distribution: [ 0] count: 6, width: 1500 us [1456;1712] ( 375 S) [ 1] count: 47, width: 484 us [480;492] ( 121 S) [ 2] count: 4, width: 976 us [972;980] ( 244 S) Gap width distribution: [ 0] count: 47, width: 484 us [480;492] ( 121 S) [ 1] count: 4, width: 1456 us [1456;1460] ( 364 S) [ 2] count: 1, width: 1936 us [1936;1936] ( 484 S) [ 3] count: 3, width: 968 us [968;972] ( 242 S) [ 4] count: 1, width: 2428 us [2428;2428] ( 607 S) Pulse period distribution: [ 0] count: 10, width: 2116 us [1944;2432] ( 529 S) [ 1] count: 41, width: 968 us [968;976] ( 242 S) [ 2] count: 3, width: 1452 us [1452;1456] ( 363 S) [ 3] count: 2, width: 2912 us [2908;2916] ( 728 S) Pulse timing distribution: [ 0] count: 10, width: 1484 us [1456;1712] ( 371 S) [ 1] count: 94, width: 484 us [480;492] ( 121 S) [ 2] count: 7, width: 972 us [968;980] ( 243 S) [ 3] count: 1, width: 1936 us [1936;1936] ( 484 S) [ 4] count: 1, width: 2428 us [2428;2428] ( 607 S) [ 5] count: 1, width: 36060 us [36060;36060] (9015 S) Level estimates [high, low]: 15927, 424 RSSI: -0.1 dB SNR: 15.7 dB Noise: -15.9 dB Frequency offsets [F1, F2]: 22601, 2388 (+86.2 kHz, +9.1 kHz) Guessing modulation: Pulse Code Modulation (Not Return to Zero) view at https://triq.org/pdv/#AAB031060105CC01E403CC0790097C8CDC8191919191919191919191919191919191919191919191919091A1819190918091819355+AAB014060105CC01E403CC0790097C8CDCA1A28291919455+AAB01E060105CC01E403CC0790097C8CDC91919192A0919191819191919191919555 Attempting demodulation... short_width: 484, long_width: 484, reset_limit: 495616, sync_width: 0 Use a flex decoder with -X 'n=name,m=FSK_PCM,s=484,l=484,r=495616' pulse_demod_pcm(): Analyzer Device bitbuffer:: Number of rows: 1 [00] {222} f5 55 55 55 55 55 51 6e a2 e2 e8 6c e5 41 54 c5 5d 55 50 00 00 00 00 00 00 00 00 00
Flex decoder data:
X 'n=test,m=FSK_PCM,s=484,l=484,r=495616
time : 2022-08-08 18:26:49 model : test count : 1 num_rows : 1 rows : len : 35 data : 6ae500000 codes : {35}6ae500000
is there already decoder which i can use or someone who have decode it ?
thank you in advance,
It does not look like the Acurite lightning detector we have and does no exactly match the FineOffset-W57.
Get raw codes with
-X 'n=Bresser-Lightning,m=FSK_PCM,s=484,l=484,r=5000,preamble=aa2dd4'
The lenght is 8 to 10 bytes, not sure with the trailer in that codes above.
Record a few different codes and post here.
Btw. the code above is aaaaaaaaaaaa 2dd4 5c5d0d9ca82a98abaaaa 00...
With -X it should show as 5c5d0d9ca82a98abaaaa00...
no data with -X 'n=Bresser-Lightning,m=FSK_PCM,s=484,l=484,r=5000,preamble=aa2dd4'
but following without preamble=aa2dd4
time : 2022-08-09 17:12:44 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 26 data : 6ae5000 codes : {26}6ae5000
time : 2022-08-09 17:13:43 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 26 data : 6ae5000 codes : {26}6ae5000
time : 2022-08-09 17:14:41 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 16 data : 6ae5 codes : {16}6ae5
I see. It was a confusion about the sample rate. Use this:
-X 'n=Bresser-Lightning,m=FSK_PCM,s=120,l=120,r=2000,preamble=aa2dd4'
here is the output
time : 2022-08-09 17:34:11 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 5c5d0d9ca82a98abaaaa0000 codes : {95}5c5d0d9ca82a98abaaaa0000
time : 2022-08-09 17:35:10 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 96 data : 5c5d0d9ca82a98abaaaa0000 codes : {96}5c5d0d9ca82a98abaaaa0000
time : 2022-08-09 17:36:08 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 5c5d0d9ca82a98abaaaa0000 codes : {95}5c5d0d9ca82a98abaaaa0000
time : 2022-08-09 17:37:07 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 5c5d0d9ca82a98abaaaa0000 codes : {95}5c5d0d9ca82a98abaaaa0000
This is only always the same code 5c5d0d9ca82a98abaaaa0000 we need a few different ones. Then we can check what changes, if there is a checksum and such.
Try to collect codes for a few days and then only show distinct (different) codes.
its also 5c5d0d9ca82a98abaaa8, but i will collect more codes and paste them here.
thank you a lot !
Hello,
i collect some more codes last night, not sure whether these help for further checks or not.
5c5d0d9ca82a98abaaaa0000000 5c5d0d9ca82a98abaaa8 5c5d0d9ca855315755540000 78ba1b39505531575550 5c5d0d9ca82a98affffc 5c7ffffffffffffffffffffffffffffffffffe 5c5d0d9ca82a98bfffffffffffffffffffffff8
time : 2022-08-09 18:19:02 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 105 data : 5c5d0d9ca82a98abaaaa0000000 codes : {105}5c5d0d9ca82a98abaaaa0000000
time : 2022-08-09 18:44:23 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 78 data : 5c5d0d9ca82a98abaaa8 codes : {78}5c5d0d9ca82a98abaaa8
time : 2022-08-10 03:00:38 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 94 data : 5c5d0d9ca855315755540000 codes : {94}5c5d0d9ca855315755540000
time : 2022-08-10 03:09:25 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 77 data : 78ba1b39505531575550 codes : {77}78ba1b39505531575550
time : 2022-08-10 03:32:49 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 78 data : 5c5d0d9ca82a98affffc codes : {78}5c5d0d9ca82a98affffc
time : 2022-08-10 03:33:47 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 151 data : 5c7ffffffffffffffffffffffffffffffffffe codes : {151}5c7ffffffffffffffffffffffffffffffffffe
time : 2022-08-10 03:43:32 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 153 data : 5c5d0d9ca82a98bfffffffffffffffffffffff8 codes : {153}5c5d0d9ca82a98bfffffffffffffffffffffff8
regards,
It might be two codes:
5c5d0d9ca82a98abaaaa0
5c5d0d9ca82a98abaaa8
but they could be the same, not sure.
Maybe simulate a lightning? Use a heavy motor near the sensor. Like a power drill or vacuum cleaner?
@MksRasp and @rct might know some trick to trigger a lightning sensor.
i follow your advice and use power drill which trigger a lighting sensor here is the results.
time : 2022-08-10 16:52:45 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : c87e0d9ca9ca98a2aaaa0000 codes : {95}c87e0d9ca9ca98a2aaaa0000
time : 2022-08-10 16:53:03 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 3ac80d9ca92a98afaaaa0000 codes : {95}3ac80d9ca92a98afaaaa0000
time : 2022-08-10 16:53:12 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 216f0d9ca93a98afaaaa0000 codes : {95}216f0d9ca93a98afaaaa0000
time : 2022-08-10 16:53:15 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 4ce00d9caeaa98abaaaa0000 codes : {95}4ce00d9caeaa98abaaaa0000
time : 2022-08-10 16:54:13 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 4ce00d9caeaa98abaaaa0000 codes : {95}4ce00d9caeaa98abaaaa0000
time : 2022-08-10 16:55:18 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 153 data : 57470d9caeba98afffffffffffffffffffffff8 codes : {153}57470d9caeba98afffffffffffffffffffffff8
time : 2022-08-10 16:56:41 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 7bae0d9cae8a98abaaaa0000 codes : {95}7bae0d9cae8a98abaaaa0000
time : 2022-08-10 16:57:25 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 113 data : 60090d9cae9a98abaaaa000000000 codes : {113}60090d9cae9a98abaaaa000000000
time : 2022-08-10 16:59:22 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 153 data : 6009ffffffffffffffffffffffffffffffffff8 codes : {153}6009ffffffffffffffffffffffffffffffffff8
time : 2022-08-10 16:59:32 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 94 data : 227c0d9caeeab15755540000 codes : {94}227c0d9caeeab15755540000
Very good. Here is a BitBench with that data. It seems like there is a checksum in the first two bytes. Strange that it's in the front. It does not work as CRC but seems like one.
Maybe @rct can spot which fields encode things like distance and count.
This appears to follow the protocol of Bresser 7-in-1 messages (both OEM'd by CCL Electronics). It looks like a 16 bit digest followed by a 16 bit ID followed by a 12? bit BCD count and then the rest.
@anthyz oh, of course! very good find! After undoing the whitening (0xaa) it's LFSR-16 gen 8810 key abf9 final xor 899e (link update with whitening)
From reading the manual apparently the sensor does some basic loud noise detection, too. No indication it's reported in a message, though. Might be good to experiment with that as well as triggering messages with different sensitivity levels selected.
here is some messages with different sensitivity levels selected.
Sensitivity LOW + triggering the sensor.
time : 2022-08-11 17:20:39 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 78 data : 0e950d9caeda98abaaa8 codes : {78}0e950d9caeda98abaaa8
time : 2022-08-11 17:21:15 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 78 data : 91d80d9cae2a98abaaa8 codes : {78}91d80d9cae2a98abaaa8
time : 2022-08-11 17:22:13 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 91d80d9cae2a98abaaaa0000 codes : {95}91d80d9cae2a98abaaaa0000
Sensitivity - Medium + triggering the sensor
time : 2022-08-11 17:24:43 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 78 data : e6b10d9cafaa98abaaa8 codes : {78}e6b10d9cafaa98abaaa8
time : 2022-08-11 17:24:45 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : fd160d9cafba98abaaaa0000 codes : {95}fd160d9cafba98abaaaa0000
time : 2022-08-11 17:25:20 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : d1ff0d9caf8a98abaaaa0000 codes : {95}d1ff0d9caf8a98abaaaa0000
time : 2022-08-11 17:25:30 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : ca580d9caf9a98abaaaa0000 codes : {95}ca580d9caf9a98abaaaa0000
I've update the BitBench link above. At least an event counter is visible. There could be a strength or distance indicator in the middle and maybe flags (interference detected?) at the very end?
The sensitivity setting is not in the message, and it looks like there's occasionally a bad bit flip at the end (see the two examples with digest 0x3b72). For distance, byte[7] could be a candidate. I wonder if experimenting with the sensitivity set to high would get more varied results.
Good morning,
messages i've posted in the begging were with sensitivity level - High,
i follow your advice and use power drill which trigger a lighting sensor here is the results.
time : 2022-08-10 16:52:45 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : c87e0d9ca9ca98a2aaaa0000 codes : {95}c87e0d9ca9ca98a2aaaa0000
time : 2022-08-10 16:53:03 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 3ac80d9ca92a98afaaaa0000 codes : {95}3ac80d9ca92a98afaaaa0000
time : 2022-08-10 16:53:12 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 216f0d9ca93a98afaaaa0000 codes : {95}216f0d9ca93a98afaaaa0000
time : 2022-08-10 16:53:15 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 4ce00d9caeaa98abaaaa0000 codes : {95}4ce00d9caeaa98abaaaa0000
time : 2022-08-10 16:54:13 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 4ce00d9caeaa98abaaaa0000 codes : {95}4ce00d9caeaa98abaaaa0000
time : 2022-08-10 16:55:18 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 153 data : 57470d9caeba98afffffffffffffffffffffff8 codes : {153}57470d9caeba98afffffffffffffffffffffff8
time : 2022-08-10 16:56:41 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 95 data : 7bae0d9cae8a98abaaaa0000 codes : {95}7bae0d9cae8a98abaaaa0000
time : 2022-08-10 16:57:25 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 113 data : 60090d9cae9a98abaaaa000000000 codes : {113}60090d9cae9a98abaaaa000000000
time : 2022-08-10 16:59:22 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 153 data : 6009ffffffffffffffffffffffffffffffffff8 codes : {153}6009ffffffffffffffffffffffffffffffffff8
time : 2022-08-10 16:59:32 model : Bresser-Lightning count : 1 num_rows : 1 rows : len : 94 data : 227c0d9caeeab15755540000 codes : {94}227c0d9caeeab15755540000
@zuckschwerdt, what might be the decoder for distance and eventually for distance as per suggestion above for byte [7]. im in area where the forecast for the next days is heavy thunderstorms, which could be good opportunity for testing.
thank you in advance,
Sorry, I don't have any experience with lightning sensors. Log all data if you can and maybe note down some prominent events (with the "every 3 seconds between lightning and thunder equals a kilometer" estimate).
Just a wild guess, but IF the sensor uses an "AS3935 Franklin Lightning Sensor IC" by AMS, the datasheet (e.g. https://www.digikey.de/htmldatasheets/production/1124289/0/0/1/as3935.html) might provide some insights about the kind of data and encoding to be expected.
Just a wild guess, but IF the sensor uses an "AS3935 Franklin Lightning Sensor IC" by AMS, the datasheet (e.g. https://www.digikey.de/htmldatasheets/production/1124289/0/0/1/as3935.html) might provide some insights about the kind of data and encoding to be expected.
here is the picture of the board, there is RFID transponder coil ma5532-ae, google says Developed to work with austriamicrosystems AS3935 Franklin Lightning Sensor IC (e.g. https://www.coilcraft.com/en-us/products/rf/rfid-transponders/x-y-axis-transponder-coil-2mhz/ma5532/)
I would like to bet on what kind of IC U3 is... And we have nice little labelled test points (I²C interface) on the PCB! There shines a little light into the black box!
And there is a serial interface (RX, TX), too! Maybe it has something to tell you, too!
Excellent finds! According to Table 17 in section 8.9.3 of the AS3935 datasheet there are 16 possible distance values. The byte[7] values seen so far in the bitbench data (01, 05, and 08) are consistent with this table.
more data from the heavy thunderstorms we just had + video :)
https://user-images.githubusercontent.com/110809838/184691686-d7a2e7e2-96a9-4662-abaf-8e88b6de5ecb.MP4
Removing dups and broken codes this BitBench shows 4 events, the first at 21 km, then 3 overhead ;) Nothing apparent in the remaining 12+16 bits. Might be good enough for a decoder, then watch the unknown fields long term, maybe some pattern reveals someday.
more data from the heavy thunderstorms we just had + video :) 1660585221297348.MP4
Nice test setup! :-)