ESP32 Brushless controller - Dagor

hardware support
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Is the spi bus exposed in headers somewhere or does it need jumper wires soldered? LAN9252 is an spi slave device.

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:wink:

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We can see that YOU have the boards. But are when are WE going to get the boards :wink:

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Hi,
Nice work.I like your design, compact and i guess low cost. I think you have a few extra boards. Have you tried controlling all at the same time via wifi broadcast? I wonder what the latency. Could be perhaps it is necessary to add rs485 or a can chip on the board?

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Hey @alp,

I’ve controller 4 boards at the same time through ESP-NOW. The goal of this board is to be different and try to exploit the ESP32’s features. You could totally talk to the board via UART too.

If people show interest or if I get the necessity I’ll design a CAN board to work in parallel with the Dagor board.

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@David_Gonzalez thanks for reply. We are following your project and can’t wait to try it out :+1:

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Hi @David_Gonzalez,
as far I can see you are using an magnetic sensor for the feedback loop, right?
Would it also be possible to use hall sensors?

BTW: very great work :+1:

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Hey @Juxo,

Yes I use a magnetic sensor to close the loop. I left 4 GPIOs open (2 free to use easily, 2 free to use with care if you’re constantly flashing the board), so you should be able to connect hall sensors to the board. I haven’t tested this, but would like to give it a try.

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Hi @David_Gonzalez,
I’m not familiar with the ESP stuff, but convinced that it is powerful and reliable.
I guess it would need at least 3 GPIO with hardware interrupt support. Do you think this is possible? I’m not sure what you mean with “constantly flashing”. Are two of the pins RX/TX?
If so, I would also give the board a try :wink:

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I do think it is possible :slight_smile:

The free GPIOs are the following: 21, 22, 0 and 12.
21 and 22 are free to use for anything, interrupts, pwm, digital output/ input, ADC (if not using wifi or ESP-NOW), UART, i2c, etc.

IO0 has to be pulled low to enter flash mode for the ESP32, so if it’s used as an input and not an output you have to be careful with this pin’s state when flashing the MCU and when trying to reset.

IO12 has to be pulled low or floating during boot or a brownout condition will occur.

Aside from that, these pins can be used for all the things stated above.

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Hi @David_Gonzalez, thanks a lot for sharing your designs and all the nice applications! It appears that your controller board is exactly what I am looking for in order to build a paragliding trainer (and later on, if time permits, a paragliding flight simulator). I have some questions though:

  • What is the current status of the project? Is it stable enough to use it or are there still problems with soldering etc., as mentioned before?

  • Do you plan to sell the boards again? If so, when?

  • If you don’t have any plans to sell the design, can I just take the existing files from Github (are the published files tested already?) and have some manufactured for myself (and perhaps others from the community if interested)?

  • What is your experience with board manufacturing and current component availabilty?

  • Is there another forum or the like, where this controller is discussed?

I am very sorry to bother you with all these questions, but the forum has been a bit quiet around these controllers for a while and I assume you have really significant experience with this fantastic project!

  • Chris