UART problems and questions

3 thoughts on “UART problems and questions

  1. Hello,

    I’m having the most basic of problems using the GL865 V3
    I made a custom board (do you need to see it?) that connects the GL865 to an atmel mC. 
    The mC is running at 1.8V, so level compatibility is assured.
    I’m only using TX/RX to communicate at the standard 115,200 bauds (that is the factory default, right?) and have placed DTR and RTS to ground.
    Nothing happens. When I place a scope probe on the mC TX line, it´s in HIGH state all the time (same as the RX line). The software works, having tested it on another mC.
    Any clues to what I’m doing wrong?
    Thank you,