How to correctly parse the Bits in a git line

[Kevin Saye]

I have been able to parse the output of: https://www.banggood.com/DY-SQ100B-Water-Leakage-Detector-Rustproof-Sensor-Alarm-433MHz-for-Security-Home-Alarm-System-p-1266537.html as seen here:

• 16DDFAE28: https://triq.org/pdv/#AAB10303A0013C271481818190819090819090819090908190909090909081908190909081818190819255
• A5DCFAE28: https://triq.org/pdv/#AAB10303A0013C271481818190908190909090819090908190909090909081908190909081818190819255
• 1BDDFAE28: https://triq.org/pdv/#AAB10303A0013C27B481818190908190909090819090908190909090909081908190909081818190819255

I have written a decoder as such:

decoder {

    name=LeakDetector,

    modulation=OOK_PWM,

    short=316,

    long=968,

    reset=916,

    gap=0,

    tolerance=261,

    bits=33,

    get=Location:@0:{16}:[42460: HotWaterHeater 5853:KevinSink 7133:KitchenSink]

}

My challenge is really understanding the get= line and how to parse the data: 1BDDFAE2

It appears that 1BDD is the 'serial number' and FAE28 is data. Am I parsing IBDD correctly in my decoder? Any thought would be appreciated.

[Christian Z.]

Yes, looks good.

A leakage detector would be like a motion detector and only signal "alarm". If FAE2 is the only data you see then just add

  match=FAE2

to remove false alarms. Ignore the trailing "8" that's just one bit and likely sync.

[Kevin Saye]

Thanks for the confirmation.

For others using that device, here is my final "LeakDetector.conf":

# Decoder for the WaterLeak Detector: https://www.banggood.com/DY-SQ100B-Water-Leakage-Detector-Rustproof-Sensor-Alarm-433MHz-for-Security-Home-Alarm-System-p-1266537.html

#

# Operates on 433.920MHz.

# All models emit identical id's.

decoder {

    name=LeakDetector,

    modulation=OOK_PWM,

    short=316,

    long=968,

    reset=916,

    gap=0,

    tolerance=261,

    bits=33,

    get=Location:@0:{16}:[42460:HotWaterHeater 5853:KevinSink 7133:KitchenSink],

    get=Message:@16:{8}:[250:Alarm],

    get=Battery:@24:{4}:[14:Ok 12:Low]

}

And here is how I run RTL_433:

rtl_433 -F json -F http -c /usr/local/etc/rtl_433/LeakDetector.conf

Which outputs the following message:

 {"model": "LeakDetector", "count": 1, "num_rows": 1, "rows": [{"len": 33, "data": "1bddfae28", "Location": "KitchenSink", "Message": "Alarm", "Battery": "Ok"}], "codes": ["{33}1bddfae28"]}

[Christian Z.]

Thanks! We'll add this as an example.

If you also add

    unique,

then you get e.g.

    {"model" : "LeakDetector", "count" : 1, "num_rows" : 1, "len" : 33, "data" : "16ddfae28", "Location" : "KevinSink", "Message" : "Alarm", "Battery" : "Ok"}

which might be easier to parse.

[Kevin Saye]

thanks!