MP very slow with MicoAir H743 V2

ArduCopter
1

Does anyone face the issue where Mission Planner gets the full parameters very slowly with MicoAir H743 V2 through the USB Type-C connector @115200bps? It takes approximately 2m30sec.

5/3/2026 1:34:14 pm : Frame: QUAD/X
5/3/2026 1:34:14 pm : RCOut: DS300:1-4 PWM:5-11
5/3/2026 1:34:14 pm : MicoAir743v2 00400022 32335116 37363536
5/3/2026 1:34:14 pm : ChibiOS: 88b84600
5/3/2026 1:34:14 pm : ArduCopter V4.6.2 (1ebd4d99)

SERIAL0_BAUD,115
SERIAL0_PROTOCOL,2

Mission planner 1.3.83 on Windows 10 pro

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1 Like
2

I still do not know what causes it to become slow suddenly.
I used STM32CubeProgrammer to flash version 4.6.3, reconfigure the parameters, and I’m back to normal MP connection speed now.

3

I think this page caused the problem. I encountered it again. After I changed one of the port values, the next USB connection continues to loop for parameter values.

Wonder if this user is experiencing the same issue.

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4

Glad to see it solved for you. I’m using the V2 though in the AIO form factor. Occasionally, and by that I mean like 1 time out of 100, I experience a very slow param download, and there is no rhyme or reason. When that happens I usually unplug and try again and it works.