Rpi-aprs-cmdline.txt

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/boot/cmdline.txt

The file cmdline.txt in the /boot directory can configure additional TTY's. In case the serial port of the TNC-Pi board is used it is a requirement to remove some of the tty settings in this file.

The original Raspberry Pi /boot/cmdline.txt file contains a single line with the following arguments: 

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

To use the TNC-Pi board, take out the following two arguments:

  • console=ttyAMA0,115200
  • kgdboc=ttyAMA0,115200

New config line: 

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait
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