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Arlec PC191HA Series 3 Plug-in Socket: Teardown, Firmware, and Configuration Details

ilengyel 789 1
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  • #1 21359940
    ilengyel
    Level 11  
    It appears we now have another revision to the Arlec PC191HA Plug-in socket with energy metering. For reference here are the links to the teardown for Series 1 and Series 2.

    Some pictures of the outside:
    Packaging of Arlec PC191HA-4 Series 3 4-pack with smart power adaptors Exterior of the Arlec PC191HA Series 3 plug-in socket with energy meter.

    Pictures of the inside:
    Inside view of the Arlec PC191HA socket with components covered in silicone. Dismantled Arlec PC191HA socket showing CB2S module and integrated circuit. Close-up of the interior of an Arlec PC191HA socket showing capacitors and a silicone protective coating. Close-up of CB2S module with BK7231N label on a blue printed circuit board. Image of the interior of the Arlec PC191HA plug socket showing electronic components.

    It appears like a slightly more compact layout with dabs of silicone around the components I assume to improve robustness.

    The Tuya firmware version I saw when connecting it to the SmartLife app was 1.1.17 which apparently is a patched version preventing CloudCutter from flashing. I tried one of the profiles with no success.

    So I de-soldered the module for flashing the old fashioned way.
    Connected electronic device with colored wires and a USB module during soldering.

    Device configuration, as extracted from Tuya (using Easy UART Flasher):
    - BL0937 SEL on P24
    - Button (channel 1) on P11
    - LED (channel 1) on P26
    - BL0937 VI on P6
    - WiFi LED on P10
    - BL0937 ELE on P7
    - Relay (channel 1) on P8
    Device seems to be using CB2S module, which is using BK7231N.
    And the Tuya section starts, as usual, at 2023424

    Config in json format:
    Code: JSON
    Log in, to see the code
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