Problem: When I connect the battery, I hear the first three tones (ESCs have power) but not the second two, which I understand means that they are not communicating with the FC. I have tested, and I can’t get the motors to spin with MissionPlanner motor test.
Setup: Omnibus F4 Pro flashed with ArduCopter 4.0.3 (same problem existed on previous versions). Racerstar 35A Anniversary 4 in 1 BLHeli_S ESC. I also don’t have a radio receiver connected. But is this necessary for the ESCs to start up properly and to test motor rotation in MissionPlanner (so that I can confirm correct direction, etc).
The ESCs initialize properly, and spin the motors, when I use a servo tester. I have tried selecting different protocols such as “Normal” and different DShot protocols (150 and 600). No difference. I tried lower the pwm min output without any luck. ESC calibration doesn’t work as described. Tried to configure BLHeli passthrough, but BLHeli Suite can’t find the ESCS. I wanted to tinker more but now for some reason my PC and FC don’t want to connect, and I need to troubleshoot that problem. In the meantime I thought I’d ask if anybody has a suggestion for what I should have a look at.
Many thanks in advance!