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[Solved] BK7238 UART Pinout for Flashing OpenBK on E-WELink 16A Mini Smart Switch

leon22heart 18 3
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  • #1 21845884
    leon22heart
    Level 3  
    Hello to all. Got 4 generic E-WELink Generic 16 A Mini Smart Switch. They seem to use the BK7238 chip. I assume this based on the components that correspond to another thread of mine https://www.elektroda.com/rtvforum/topic4164432.html. So I try to flash the OpenBK firmware but I can't get a UART connection. Can someone suggest the pins location that I have to solder? Those that I soldered give power to the board but not RX/TX connection. Also to reach the pins I desoldered the 16 A relay.

    BK7238 UART Pinout for Flashing OpenBK on E-WELink 16A Mini Smart Switch Circuit board with green screw terminal and connected wires, plus a separate black relay module Close-up of a blue PCB module with a green screw terminal block and capacitors
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  • Helpful post
    #2 21845890
    insmod
    Level 30  
    Is it Tuya?
    I see BL602 chip, no Tuya devices are known to utilize it.
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  • #3 21845898
    leon22heart
    Level 3  
    >>21845890 You are right, it isn't. It uses an eWelink app. Should I try with the BL602 firmware?

    PS1: Flashed firmware.
    PS2: Same topic as Link. Closing the topic.
  • #4 21845938
    leon22heart
    Level 3  
    Identified the device as Link.
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