Bolt ESC Calibration

Discussions about quadcopters/multi-rotors
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Posts: 5
Joined: Thu Jan 16, 2020 11:23 am

Bolt ESC Calibration

Post by thefred » Tue May 26, 2020 2:22 pm

Hi All,

I've been trying to use a crazyflie Bolt with a 4 in 1 ESC (it has BLHeli) and I am having an issue with recalibrations.

Each time I turn on the quad, I go to an unknown calibration state. :(

Since my ESC goes over the recommended maximum current the Bolt can handle, I am connecting it directly to the battery and only using the signal pins from the "jst" connectors; I assume the Bolt has a way of turning the power to the ESCs on and off, but in my case I can't use those.

What should I do? I think that if I use DSHOT I can avoid this, but I think this is not supported yet (see ... issues/539 and viewtopic.php?f=9&t=4133&p=18767&hilit=dshot#p18755). So how do I solve this?

If it is as simple as changing some BLHeli stuff (so that it does not recalibrate each time it powers on), then how do I proceed?

I suppose I can use a USB dongle (like this ... 77455.html with only the signal and ground and power the ESC with a battery?
(ESC is 2S and I will not turn on with 5V)

Or can I use the Crazyflie radio interface somehow for comms with BLHeli?

Posts: 2013
Joined: Mon Jan 28, 2013 7:17 pm
Location: Sweden

Re: Bolt ESC Calibration

Post by tobias » Wed May 27, 2020 1:49 pm

Have you investigated why this calibration state happens? Does it take to long until the ESC get the motor signal or does it maybe not like the motor signal? Are you running 400Hz PWM (standard setting) or OneShot125?

It would have been nice with a BLHeli pass though interface, which should be possible, but someone has to do it...

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