Problem with OPTO ESC and APM 2.6

i have issues calibrating/using OPTO ESCs with APM 2.6. No matter what i do i cant calibrate or make them work, using either all at once or one by one method. There are only black and white wire on the ESC. Im using APM power module. There is a beeping sound from the esc but from only one of them as i can tell and nothing happens when i try to calibrate.
Im using PDB.

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Laurie J. Troy liked Jasper Kueppers's profile
Apr 1