Which component on Duet 2 Wifi would cause serial ports to fail?



  • Entirely my own fault as I had a wiring fault that dumped all of the ground main power out of the ground from the expansion connector.
    The board still works but I cannot connect via PanelDue or any other serial device. USB works as does WiFi. I can't see any damage on the board but could do with a pointer as to what component might have failed so I can have a pop at replacing it. Any thoughts from those who know the schematic of these boards?


  • administrators

    Unfortunately, if the PanelDue serial port is not working, it's almost certain that the corresponding pins on the microcontroller have failed. There is on protection on those pins other than the ESD protection diodes in the microcontroller.



  • Thanks. I thought it might be.
    I'll have a go at replacing it. I've replaced the board so might as well have a go and see if I can resurrect this one.


  • administrators

    @rilot said in Which component on Duet 2 Wifi would cause serial ports to fail?:

    Thanks. I thought it might be.
    I'll have a go at replacing it. I've replaced the board so might as well have a go and see if I can resurrect this one.

    Be very careful not to lift any of the traces that the MCU pins are soldered to. Use a suction device to lift the MCU off the board.


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