Translations:Wiren Board 5.1: GPIO List/57/en
- /dev/ttyAPP0 - GSM-modem
- /dev/ttyAPP1 - port RS-485 on RS-485 terminals
- /dev/ttyAPP4 - port RS-485 on RS-485/CAN terminals
- /dev/ttyAPP2 - port UART on first extension module
- /dev/ttyAPP3 - port UART on second extension module