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Switch Module QL-0833 REV:0 with P-mjnr Controller – Identification and RF Port Use

zakdma 324 7
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  • #1 21736547
    zakdma
    Level 3  
    New switch module arrived, with the isolated relay. It also has an RF port to connect RF submodule, but no RF module arrived with it.
    The module contains an unknown controller module soldered in. Controller module has only "P-mjnr" marking and QR code ZOQH18SY00733
    Module PCB has also marking
    QL-0833
    REV:0
    2024.09.25

    Has someone faced such a module?

    Images:

    Mini 1 Gang Wi-Fi switch module with connection terminals and labeling
    QLRELAY BJ-SS-105D relay module with electronic components on PCB
    Green PCB with SMD electronic components and labeled terminal connections
    Close-up of a small PCB with electronic components and a QR code label

    
    {
      "vendor": "Tuya",
      "bDetailed": "0",
      "name": "Tuya Dry Relay Module QS-WIFI-SEC01-DC",
      "model": "QS-WIFI-SEC01-DC",
      "chip": "BK7231N",
      "board": "QL-0833",
      "flags": "0",
      "keywords": [
        "CBLC9S",
        "BK7231N",
        "QL-0833",
        "QS-WIFI-SEC01-DC"
      ],
      "pins": {
        "6": "WifiLED_n;0",
        "7": "Rel;0",
        "8": "dInput_n;0"
      },
      "command": "",
      "image": "https://obrazki.elektroda.pl/6083973100_1761845359_thumb.jpg",
      "wiki": "https://www.elektroda.com/rtvforum/topic4151106.html"
    }
    


    Tuya config JSON
    
    {
       "abi":"0",
       "id":"null",
       "swv":"1.3.0",
       "bv":"40.00",
       "pv":"2.2",
       "lpv":"3.3",
       "pk":"mjnroaglpmhrikqt",
       "firmk":"null",
       "cadv":"1.0.4",
       "cdv":"1.0.0",
       "dev_swv":"1.3.0",
       "s_id":"null",
       "dtp":"0",
       "sync":"0",
       "attr_num":"1",
       "mst_tp_0":"9",
       "mst_ver_0":"1.3.0",
       "mst_tp_1":"0",
       "mst_ver_1":"null",
       "mst_tp_2":"0",
       "mst_ver_2":"null",
       "mst_tp_3":"0",
       "mst_ver_3":"null "
    }
    
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  • Helpful post
    #3 21737203
    p.kaczmarek2
    Moderator Smart Home
    I think I also posted a teardown of such module once. I remember this RF socket. It can be used as generic GPIO, but it is not isolated from mains, so touching it can be very dangerous. I have bought my piece on polish site Allegro.
    Helpful post? Buy me a coffee.
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  • #4 21747460
    zakdma
    Level 3  
    I desoldered the module from the PCB and it is CBLC9S (BK7231N).
    There is no possibility to update firmware without module desoldering because RX and TX do not get out of the module.

    Small PCB marked CBLC9S with wires soldered to labeled pins

    I read Tuya firmware and wrote OpenBeken one.
    But unfortunately, it cannot decode the Tuya config, so I don't know the pins.

    Tuya config JSON
    
    {
       "abi":"0",
       "id":"null",
       "swv":"1.3.0",
       "bv":"40.00",
       "pv":"2.2",
       "lpv":"3.3",
       "pk":"mjnroaglpmhrikqt",
       "firmk":"null",
       "cadv":"1.0.4",
       "cdv":"1.0.0",
       "dev_swv":"1.3.0",
       "s_id":"null",
       "dtp":"0",
       "sync":"0",
       "attr_num":"1",
       "mst_tp_0":"9",
       "mst_ver_0":"1.3.0",
       "mst_tp_1":"0",
       "mst_ver_1":"null",
       "mst_tp_2":"0",
       "mst_ver_2":"null",
       "mst_tp_3":"0",
       "mst_ver_3":"null "
    }
    


    Original Firmware:
    readResult...-07-04.bin Download(2 MB)
  • Helpful post
    #5 21747480
    p.kaczmarek2
    Moderator Smart Home
    Helpful post? Buy me a coffee.
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  • #6 21747596
    zakdma
    Level 3  
    I found pins using GPIO Finder tool.

    
    {
      "vendor": "Tuya",
      "bDetailed": "0",
      "name": "Tuya Dry Relay Module QS-WIFI-SEC01-DC",
      "model": "QS-WIFI-SEC01-DC",
      "chip": "BK7231N",
      "board": "QL-0833",
      "flags": "0",
      "keywords": [
        "CBLC9S",
        "BK7231N",
        "QL-0833",
        "QS-WIFI-SEC01-DC"
      ],
      "pins": {
        "6": "WifiLED_n;0",
        "7": "Rel;0",
        "8": "dInput_n;0"
      },
      "command": "",
      "image": "https://obrazki.elektroda.pl/6083973100_1761845359_thumb.jpg",
      "wiki": "https://www.elektroda.com/rtvforum/topic4151106.html"
    }
    



    One question. How to make WiFi LED to turn ON/OFF according to relay?
    It flashes during connection and then turns OFF when connected.
  • Helpful post
    #7 21747612
    p.kaczmarek2
    Moderator Smart Home
    Helpful post? Buy me a coffee.

Topic summary

A newly received switch module labeled QL-0833 REV:0 dated 2024.09.25 features an isolated relay and an RF port intended for connection to an RF submodule, which was not included. The module contains a soldered controller marked only with "P-mjnr" and a QR code, whose identification is unclear. The inquiry seeks information on the controller's identity and the intended use of the RF port. No additional responses or clarifications were provided to identify the controller or specify the RF submodule compatibility.
Summary generated by the language model.
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