I have two ODB-II UART boards that have both accidentally been flashed while hooked up to an Arduino over the TX/RX serial connection. As I'm sure you can imagine, both of these units now power on to a solid red light. Neither unit broadcasts the ELM327 welcome message, or responds to any commands via serial (Tested using FTDI usb breakout).
Does anyone know where I can find more information about repairing these boards?
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