The V5 series autopilot supports ArduPilot. The following mainly explains how to load ArduPilot firmware.
ArduPilot firmware AC3.7/AP3.98 or higher supports V5+/V5 NANO.
For a better experience, please update mission planner to 1.3.57 or higher.
Load firmware online：
Connect the autopilot to the computer, open the ground station, click the "initial setup" interface》 "Install Firmware" and select the firmware type you need》waiting for the Load firmware to complete.
Load custom firmware：
V5 nano firmware (the following firmware is the official Ardupilot firmware)：
Select Load Custom Firmware>>Select Firmware >> Waiting for firmware write to end