Pixhawk 6X + ELRS: Bounded but No Signal in ArduPilot (Grey Bars in Mission Planner)

ArduCopter Copter 4.6
1

My tech: Pixhawk 6X, MatekSys 2.4GHz ELRS receiver, and a RadioMaster Zorro (ELRS version) connected via Telem 3. The receiver binds perfectly with the transmitter (the light is solid red and the transmitter indicates a successful bind).

I also received the receiver with the pins already connected. I tried to configure the radio for my drone following the ArduPilot ExpressLRS setup guide, and updated the firmware on both Rx/Tx to the last version but the configuration bars remain grey.

What should I do?

2

Configuring RC Input on the right Serial Port?

Pixhawk 6X
UART Mapping

  • 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 → UART4 (User)
  • SERIAL7 → USART3 (Debug)
  • SERIAL8 → USB (MAVLink, can be used for SLCAN with protocol change)