Setup with the Ardupilot System

VioZio Control Cable Update April 2026

HARDWARE SETUP

Connect the Pixy LR S-port UART to the Telem2 on the ArduPilot systems.

PARAMETER SETTING

Firmware Requirement

• Version: Ardupilot 4.3 or higher

• Support Mavlink v2 protocol

Set up the telemetry baud rate

Typically, the telemetry port used on a Pixhawk is Telemetry 2, which corresponds to SERIAL2. If another telemetry port (e.g. Telemetry X) is used, it will correspond to SERIALX accordingly.

Pixy LR SP connects to FC at the baud rate of 1250000.

• SERIAL2_PROTOCOL: “Mavlink2”

• SERIAL2_BAUD: “1250000"

Set mount params

Ardupilot 4.3 or higher

• MNT1_DEFLT_MODE: "3" (RC control mode)

• MNT1_TYPE: “6” (MAVLink gimbal)

• MNT1_RC_RATE: “240” // change control gimbal by speed

Ardupilot lower 4.3

• MNT_TYPE: “SToRM32 MAVLINK"

Settings stream rate to receive forward messages from telemetry 2 (from Autopilot)

• SR2_POSITION: "10" // receive GPS messages

• SR2_EXT_STAT: "2" // receive GPS lock signal

Set cam type

• CAM1_TYPE: "5"

Note: Reboot the Pixhawk after changing any parameters.

SETTING APP QGroundControl

Setup video streaming

• Use HDMI: Choose "Herelink AirUnit.

Enable SBUS Output on Pixhawk (Optional Feature)

Note: SBUS Output is an optional feature and is not required for normal operation.

Step 1: Enable SBUS Output on the Pixhawk

Configure the following parameters in the Pixhawk:

• BRD_SBUS_OUT = 1

• SERVO9_FUNCTION = 59

• SERVO10_FUNCTION = 60

Step 2: Configure the Herelink Remote Controller

Assign the following channels on the Herelink remote controller:

• Channel 9 → CAM Short Press

• Channel 10 → Scroll Wheel

This configuration enables Herelink Mode for controlling the gimbal.

Important: Ensure that both the Default Value and Active Value are configured exactly as shown in the reference image. Incorrect values may prevent the controls from functioning properly.