Unable to get ESC passthrough with Matek 743 slim

Hi,

I finally got my Matek 743 Slim copter board, and I was not able to get it connect using pass through option to 4 x 1 ESC from speedybee, which runs BL_HELI_S. I did not have problems to do so with Speedybee FC 405.

Basically, I have set Servlo_BLH to Auto, 1.
And I have set Servo 1…4 as Motor 1…4

When I try to connect using ESC-configurator.com, I select one of the two COM ports, one works, and the other does not, and the one which works brings me to Unique device ID received¨, but then nothing happens, i.e. when I press read settings, there is absolutely no change on the screen.

I have NOT connected motors to ESC, I assume that this does not matter.
I have Main Battery Connected to ESC board.
On speedybee FC-ESC combo, there are 8 wires, VBAT, GND, M1, M2, M3, M4, Cur, Tel.
On Matek 743 - ESC, I have connected all, but the TEL, not sure if that is correct, but the wiring example on Matek website shows the TEL open.

I have tried 4.6 BETA 3, and I also flashed 4.5.7, but the behaviour is exactly the same.

Also tried to set SERVO_BL_MASKS, but it is the same.

I was able to solve the problem: I was able to connect to ESCs using SpeedyBee F405 FC. This FC connected on the first try. I then flashed the Bluejay 21.0. After I swapped the Matek FC H743 controller, it started connecting to the ESCs.

Conclusion: There is BUG in ARDUPILOT which prevents connection of MATEK H743 board to ESCs with BL_HELI_S. This bug seems not to affect F405 FC, at least from SpeedyBee, and it does not affect ESCs with BlueJay

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I had the same problem.
Had to flash Betaflight to flash the ESCs from BL_HELI_S to BlueJay.

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