Is it normal for ESC to beep constantly (short beeps) from connecting the battery (power to BBBlue) and until arducopter started. Then I hear some sort of musical beeping. Beaglebone blue, I didn't fly yet.
Not unless you are calibrating your ESCs, then the beeps and musical beeps are then warranted.
I was reading the docs. It seems that while the calibrations of the ESCs are taking place, the beeps then take place.
Hi, it's depend of the esc firmware.
I have some hobbywing what does this beeps until arducopter starts - around 1 minute since the board start
I have some esc - like hobbywing 4 in 1 esc that doesn't work with beagles - the firmware wait for some pwm pulses when are powered up, if not receive any pwm signal simply shutdown and is useless using with arducopter