u/Mizantroph01001

Hello,

I have a problem with the connection between the MicoAir 55A 4in1 ESC and my SpeedyBee F7 V3.

After connecting the ESC to the FC using the provided 8-pin cable, the flight controller does not work correctly. Only a dim red LED lights up on the FC and the board does not initialize properly from the ESC power connection.

The ESC gives only the first 3 startup beeps and never gives the final 2 confirmation beeps, which suggests there is no communication between the ESC and FC.

The same flight controller works correctly with another ESC, so the FC itself appears to be functional.

I also tested multiple 8-pin cables and the result is always the same:

only 3 startup beeps,

no communication with the FC,

ESC configurator shows errors such as: “ACK_D_GENERAL_ERROR” and “max retries reached”.

I checked the wiring and pinout according to the documentation and everything seems to be connected correctly.

Could you please help verify:

if the pinout is correct,

whether this ESC is compatible with SpeedyBee F7 V3,

or if the ESC may be defective?

Thank you.