Help decoding DIGOO Contact Sensor

[FuzzyMistborn]

Picked up a few of these off Banggood on flash sale, having issues decoding them. https://www.banggood.com/DIGOO-433MHz-New-Door-and-Window-Alarm-Sensor-for-HOSA-HAMA-Smart-Home-Security-System-Suit-Kit-Access-p-1388985.html

Here are my cu8 files running rtl_433 -S unknown: digoo.zip digoo and digoo2 are from the same device, digoo3 and digoo4 are from different ones.

I've gotten close with the following but not quite there:

Attempt 1: -X 'n=name,m=OOK_PWM,s=412,l=1232,r=1244,g=0,t=328,y=0' Attempt 2: -X 'n=name,m=OOK_PWM,get=@0:{20}:id,get=@20:{4}:event:[6:close 12:open],s=432,l=1264,r=1236,g=0,t=333,y=0,bits=25'

Happy to provide any extra information, greatly appreciate the help!

[zuckschwerdt]

Looks like a EV1527 or similar. This output of the decoder is correct: E.g. first sample

model     : Generic-Remote                         House Code: 9343
Command   : 83           Tri-State : 0XZ0Z111ZZ01

e.g. "digoo3"

model     : Generic-Remote                         House Code: 10059
Command   : 19           Tri-State : 0XZ1Z0X10Z01

[zuckschwerdt]

If you want a flex decoder (to extract bits) the one you got is also working, i.e. rtl_433 -R 0 -X 'n=digoo,m=OOK_PWM,s=400,l=1200,r=2000'

[FuzzyMistborn]

Ok, that gets me somewhere, but there's still a lot of "generic-remote" traffic when i open/close the sensor. And frustratingly when I try to dump it into MQTT to use in HASS it's not really helpful because the topic doesn't have an ID. Here's what I mean:

The Generic-Remote ID of 10059 is the one sensor I'm trying to track (for now). Anything I can do to try to clean that up a bit?

Command: rtl_433 -X 'n=digoo,m=OOK_PWM,s=400,l=1200,r=2000' -Fmqtt://IP,user=USER,pass=PASS,retain=1,devices=rtl_433[/model][/id]

[zuckschwerdt]

Note the -R 0, that disables internal protocols and you only get data from -X. Use ,bits>=24 to filter out stray short sequences.

rtl_433 will output the (mostly) raw data from the air. If you want to filter data and e.g. add state look into the examples in https://github.com/merbanan/rtl_433/tree/master/examples

[sycophantic]

Using the modulation parameters from the generic-remote code, here is what I managed to decode. I got data from three difference sensors and this seems right.

-X 'n=digoo,m=OOK_PWM,bits=>24,s=464,l=1404,r=1800,t=200,get=@0:{20}:id,get=@20:{4}:event:[2:LOW_BATTERY 6:CLOSE 12:OPEN]'

The devices send three distinct messages: OPEN, CLOSE, and LOW_BATTERY. Which is repeated about 20 times.

IIII IIII IIII IIII IIII EEEE ???? ????

IIII IIII IIII IIII IIII  => 20 bits for ID
EEEE => 4 bits for Event Type
???? ???? => 8 bits unknown but always is 0000 1000

EEEE = 1100 => OPEN
EEEE = 0110 => CLOSE
EEEE = 0010 => LOW_BATTERY

[arpa03]

I plan to buy this sensor. Any update about its use ?

[zuckschwerdt]

The Generic-Remote protocol or the flex decoder above should work. Documented .conf file PR appreciated if someone finds the time to write and test.