rfx-detector-in : duplicate IDs

[sabamimi]

Hello Max, Following your last comment on my previous issue, I used the X10 protocol to retrieve Door/Windows detectors ...but out of my 11 physical sensors some returns the same IDs (the same X10_DOOR/0xXXXX) I read in a previous issue that you cut down from 6 Exa digit to 4. I wonder if that could be the cause? (just a wild guess on my side) Meanwhile, as a work around, I will remove X10 protocol and create a separate rfx-PT2262 device table for those sensors and see if they are unique that way. Kind regards, Michel

[maxwellhadley]

The reason I changed from 6 hexadecimal digits to 4 is that the X10 security protocol actually allows only 65536 different device addresses (16 bits). The other two digits were automatically generated when a message was received and were always the same. Because I work on the principle that it must be possible to take a message from an rfx-???-in node and send it direct to the corresponding rfx-???-out node, when I added the X10 security transmit facility, I had to change the address format in this way.

The PT2262-type chips only support a total of 24 message bits. The allocation of these between 'address' and 'data' is completely arbitrary and varies between different systems using the chip & its clones. This isn't enough to provide a unique value for every device & alarm system, so it is highly likely the two sensors are in fact sending the same data. Using the rfx-PT2262-in node and disabling X10 reception will show if this is happeneing.

[sabamimi]

Thank you for this detail explanation. I am currently in that process and I will let you know when I have results It will probably take me few more days to answer since I am travelling today. Thanks for your support

[sabamimi]

Well, I had some time left and I finish the survey. interestingly they show no duplicates when identified by lightning 4 protocol. BUT I have decided to not manage those from nodered / Home hassistant and let the Alarm hardware deal with those mainly because of :

• no real need to duplicate the Alarm - Sensors relation in software
• a "range" issue between some sensors and the RFXCOM box

So I will limit the nodered app (for the alarm) to :

• automatically Arm Away when we leave the house

I am using the RFXCOM with other remote controls We can close the issue unless you want to get to the bottom of the duplicate issue Kind regards

[maxwellhadley]

Since the 'translation' to X10, that seems to be generating these duplicates, is being done by the RFXtrx firmware, it might be worth contacting support@rfxcom.com, or at least letting them know this is happening.