Thing:"RFXCOM USB Transceiver" not picking up sensors

Setup, Configuration and Use Runtime
1

Hello all!

I would like my “RFXCOM USB Transceiver”-thing that connects to a RFXCOM trx433e transceiver to pick up sensors that it detects and put them in the “inbox”. It used to do this (inbox was full of garage door opening commands captured) in an earlier OpenHAB-version (Dont remember which, but it was 4 or 3), but now it is not working.

If I connect the RFXCOM trx433e-unit to a Windows-machine and run RFXmngr and press a button on a NEXA MYCT-2120 it will happily inform me of a detection

2025-10-22 05:30:19:069= 0B110000005453230D010F70
Packettype = Lighting2
subtype = AC
Sequence nbr = 0
ID = 0545323 decimal:5526307
Unit = 13
Command = On
Signal level = 7 -64dBm

Any ideas on how to get this working again?

  • Platform information:
    • Hardware:Atom300/4GB/40GB SSD
    • OS: Debian 13
    • Java Runtime Environment: 21.0.9 (Temurin-21.0.9+10)
    • openHAB version: 5.0.3
2

how does your definition if the rfxtrx-bridge look like? Is disable discovery disabled?

3

Hello!

Sorry for my late reply

Edit: The RFXcom-thing works well with a hygrometer that transmits temp. and humidity (A Telldus F007TPH) and various contactors/relays (NEXA CMR-101 and NEXA MYCR-2300)

My RFXcom-thing settings:

UID: rfxcom:bridge:21a8744999
label: RFXCOM USB Transceiver
thingTypeUID: rfxcom:bridge
configuration:
enableBlindsT0: true
enableMertik: true
enableImagintronixOpus: true
enableAC: true
enableOregonScientific: true
disableDiscovery: false
enableProGuard: true
enableATI: true
enableHomeConfort: true
enableX10: true
enableMeiantech: true
enableRSL: true
enableHomeEasyEU: true
enableRubicson: true
enableARC: true
enableLaCrosse: true
enableVisonic: true
enableUndecoded: true
serialPort: /dev/ttyUSB_RFXtrx433e0
enableHidekiUPM: true
enableFS20: true
enableAEBlyss: true
enableADLightwaveRF: true
enableByronSX: true
ignoreConfig: false
transceiverType: 433.92MHz
enableBlindsT1T2T3T4: true
enableLighting4: true
enableFineOffsetViking: true
enableKEELOQ: true
transmitPower: -18
4

It might not be the course of your problem but that’s not how an rfxcom config should look like: Only enable the protocols you really need because you’ve got that specific hardware. The protocols overlap and quite a few don’t work in combination.
So this is mine:

code tab 
UID: rfxcom:bridge:RFXTRX
label: RFXCOM USB Transceiver
thingTypeUID: rfxcom:bridge
configuration:
  enableBlindsT0: false
  enableMertik: false
  enableImagintronixOpus: false
  enableAC: true
  enableOregonScientific: false
  disableDiscovery: false
  enableProGuard: false
  enableATI: false
  enableHomeConfort: false
  enableX10: false
  enableMeiantech: false
  enableRSL: false
  enableHomeEasyEU: false
  enableRubicson: false
  enableARC: true
  enableLaCrosse: false
  enableVisonic: false
  enableUndecoded: false
  serialPort: /dev/serial/by-id/usb-RFXCOM_RFXtrx433XL_DM5WWG68-if00-port0
  enableHidekiUPM: false
  enableFS20: false
  enableAEBlyss: false
  enableADLightwaveRF: false
  enableByronSX: false
  ignoreConfig: false
  transceiverType: 433.92MHz
  enableBlindsT1T2T3T4: false
  enableLighting4: false
  enableFineOffsetViking: false
  enableKEELOQ: false
  transmitPower: 1
5

Updated to this configuration, but it had no effect

UID: rfxcom:bridge:21a8744999
label: RFXCOM USB Transceiver
thingTypeUID: rfxcom:bridge
configuration:
  enableBlindsT0: false
  enableMertik: false
  enableImagintronixOpus: false
  enableAC: true
  enableOregonScientific: false
  disableDiscovery: false
  enableProGuard: false
  enableATI: false
  enableHomeConfort: false
  enableX10: false
  enableMeiantech: false
  enableRSL: false
  enableHomeEasyEU: false
  enableRubicson: false
  enableARC: false
  enableLaCrosse: false
  enableVisonic: false
  enableUndecoded: false
  serialPort: /dev/ttyUSB_RFXtrx433e0
  enableHidekiUPM: false
  enableFS20: false
  enableAEBlyss: false
  enableADLightwaveRF: false
  enableByronSX: false
  ignoreConfig: false
  transceiverType: 433.92MHz
  enableBlindsT1T2T3T4: false
  enableLighting4: false
  enableFineOffsetViking: true
  enableKEELOQ: false
  transmitPower: -18
6

Did another test: I pressed a button on the NEXA MYCT-2120 while observing the status LEDs on the RFXcom transceiver. At every button press, a yellow LED flashed on the RFXcom transceiver

7

The problem seem to have gone away now since I updated to openHAB 5.1.0 from 5.0.3. I now got the buttonpresses in my inbox.

Also, for my daily use Windows 7 computer, Firefox updates stopped at 115.32.0esr (the firefox browser im using for this post is at 145.0.1). It turned out that logs were not displayed at all in the old firefox. Asking for what webbrowser a user uses to access openHAB may be a good add to the basic info to ask for.

With a less ancient webbrowser the log viewer actually works and shows that OpenHAB indeed picks up my NEXA MYCT-2120.