GPS/GSM Error - tty device locked

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  • #16496
    automocpy
    Participant

    Hello,

    I am getting the following error when trying to connect via ppp. My configuration is an rPi zero W, connected via USB. GPS stream to rPi is working great. Here is the error:

    Dec 15 23:39:57 automocpi chat[1841]: AT+CGDCONT=1,"IP","hologram"^M^M
    Dec 15 23:39:57 automocpi chat[1841]: ERROR^M
    Dec 15 23:39:58 automocpi pppd[1800]: Device ttyACM0 is locked by pid 1839

    Any thoughts?

    Thanks

    #16498
    Mark Williams
    Keymaster

    it looks like something is using the serial port (ttyACM0)

    Try lsof /dev/ttyACM1  to see what is using it

    Mark --OzzMaker.com --

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