how do i command fan ESC from M7?

Discussion related to "under the hood" OpenMV topics.
trevorb
Posts: 15
Joined: Sun Jun 19, 2016 6:20 pm

how do i command fan ESC from M7?

Postby trevorb » Sun Feb 11, 2018 9:28 pm

I have an m7 and hope to do use it to operate a brushless fan ESC. Arduino has an ESC library that allows pin, min, max, and arming values to be input to a fan esc. Anyone have advice how to pull this off on the m7 board? Trying to inflate a bellows to raise a standing desk converter when person stands in front of desk then lower when he sits. I would like to eliminate the arduino and go directly from the m7 to an inexpensive ESC. I did an analog write with the arduino to do a 0-255 output to the esc. it did not work (just beeped and twitched the motor a little) so i installed the ESC library to arduino and it worked fine. I don't think that pyb.servo will do it(honestly haven't tried yet), so hopefully someone smarter than i Can provide an example of how to command an esc fan from M7 to esc.

Thanks in advance.
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kwagyeman
Posts: 2111
Joined: Sun May 24, 2015 2:10 pm

Re: how do i command fan ESC from M7?

Postby kwagyeman » Sun Feb 11, 2018 10:01 pm

Hi, so, the third party external library support for the OpenMV Cam is kinda thin... But, you have to start somewhere. Um, if you can find a MicroPython library for what you need we can run it.

Anyway, how is the ESC controlled? Can you send me a link to the product? If it's controllable like a servo the OpenMV Cam can handle driving it easily.
Nyamekye,
trevorb
Posts: 15
Joined: Sun Jun 19, 2016 6:20 pm

Re: how do i command fan ESC from M7?

Postby trevorb » Sat Mar 17, 2018 7:16 pm

http://artofcircuits.com/product/hobbyp ... shless-esc

I found some good information about calibrating the esc and was missing the fact that upon powerup I need to output max and min values to set the range for the esc. I will have to validate that this works but it seems promising. Thanks Kwabena.

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