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ARLEC UH551HA LED Bar Light Tuya CBLC9 Reflash and Configuration Guide

russbul 321 1
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  • Helpful post
    #1 21411871
    russbul
    Level 2  
    The ARLEC UH551HA Linkable bar light is a mains powered cool/warm LED bar light. It is also available in different lengths (UH552HA 87cm) and RGB (UC566HA)
    Long white ARLEC UH551HA LED light on a white background.
    GRID Connect device pairing and troubleshooting guide.
    Installation guide for the GRID Connect app to manage ARLEC devices.
    Link
    Sorry no pictures of the disassembly. It is challenging to open - the mains plug end is where to start. This is bonded in with silicone adhesive so poking a small screwdriver around the walls to release the bond. The end plug can be pulled out with a bit of effort. I found it was necessary to desolder the power switch in order to remove the electronics.

    The module used is a Tuya CBLC9. It is not necessary to remove the module from the PCB in order to reflash it. I soldered wire-wrap wire to the pads - thin wire is needed so that you don't accidentally rip off the pads as they are small.
    I loaded OpenBK V1.18.24.

    The configuration is:
    P7(PWM1) PWM chan 1
    P8(PWM2) PWM_n chan 0 (PWM_n so cold/warm works the right way)
    {
      "vendor": "Tuya",
      "bDetailed": "0",
      "name": "ARLEC UH551HA Bar light",
      "model": "UH551HA Light",
      "chip": "BK7231N",
      "board": "TODO",
      "flags": "5376",
      "keywords": [
        "TODO",
        "TODO",
        "TODO"
      ],
      "pins": {
        "7": "PWM;1",
        "8": "PWM_n;0"
      },
      "command": ""
    }

    Flag 8 should be enabled. This makes the web page brightness and color temp sliders work properly
    That's it - not much to it
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