Communication between mission planner and flight controller is weak

ArduCopter Copter 3.6
,
1

The communication strength is weak when the Mission Planner is wirelessly connected to the navio2. It takes a long time to get the parameters and calibrate. Is there a solution?

Environment
ArduCopter V3.6.9
Frame: QUAD
Raspberry Pi 4B
Controller: navio2

2

Get a better radio system, like the RFD900x or RFD868x.