How to use Telem3 on the board Pixhawk6c?

ArduCopter Copter 4.2
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1

When I use the ground station to configure the serial port on pixhawk6c, I can only find the configuration of telem1 and telem2, but I can’t find the configuration of telem3 on my board. Although I have configured the following serial ports, it is not successful

2
  • SERIAL0 → USB
  • SERIAL1 → UART7 (Telem1) RTS/CTS pins
  • SERIAL2 → UART5 (Telem2) RTS/CTS pins
  • SERIAL3 → USART1 (GPS1)
  • SERIAL4 → UART8 (GPS2)
  • SERIAL5 → USART2 (Telem3) RTS/CTS pins
  • SERIAL6 → USART3 (USER)
3

Thank you very much. I’ll try it now

4

I succeeded. Thank you again