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View Poll Results: Which programmers are you using
AVRisp mkII 14 23.73%
usbasp 34 57.63%
mySmartUSB light 4 6.78%
USBtiny 8 13.56%
other 2 3.39%
Multiple Choice Poll. Voters: 59. You may not vote on this poll

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Old Nov 19, 2014, 04:54 AM
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Joined Nov 2014
5 Posts
I looks like I have run into some other problem. When I make all connections to my KK2.1 board (ESCs and Receiver connections) and power on my board, I don't see any text on LCD. It just lits up and nothing else happens and after few seconds a red LED flashes continuously. Sometimes it slows down but then again it doesn't.

When I connect the board using the USBasp programmer to my computer, the board powers up and I can see text on screen.

Please help!
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Old Nov 19, 2014, 05:16 AM
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Joined May 2009
779 Posts
Did you possibly plug the ESCs in the wrong way? That's pretty much what happens.
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Old Nov 19, 2014, 01:30 PM
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Joined Nov 2014
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I figured out what was wrong. I followed this post and now my Quad flies great.

But I still don't know why I am not able to flash it with new firmware.
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Old Dec 17, 2014, 06:57 PM
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Joined Mar 2013
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HI, I am trying to build a multiwii3D quad i.e. the motors revers at below mid-stick to allow inverted flight.

I have Afro 30A ESCs, the stock firmware is labelled as afro_nfet.hex.

I am using the kkflashtool and the Afro USB programmer.

I set up the kkflashtool, Afro programmer, correct COM port, atmega-8 brushless ESC (8kb).

Red wire removed, powered by 11.1v lipo.

I downloaded these firmwares: https://github.com/c---/MultiWii3D/t...tgy_2012-09-30

Not knowing which .hex file I should be using, I pointed at the afro2.hex, set running and things STARTED to look ok ..saying Reading | #### ...

But then it seemed to stop and came up with a repeating "timeout" error

I left it for a bit, but ended up unplugging. I have since tried re-flashing with afro_nfet.hex, but it doesn't event try, just get the timeout error ...

Tried plugging into a motor, it makes a beep, but doesn't arm or run.

Have I 'bricked' the ESC?

What can I do to restore it back to health - Help!
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Old Dec 18, 2014, 02:04 AM
AVR Dude
United Kingdom, England, Cnwll
Joined Jul 2011
1,734 Posts
Quote:
Originally Posted by multicopterMick View Post
HI, I am trying to build a multiwii3D quad i.e. the motors revers at below mid-stick to allow inverted flight.

I have Afro 30A ESCs, the stock firmware is labelled as afro_nfet.hex.

I am using the kkflashtool and the Afro USB programmer.

I set up the kkflashtool, Afro programmer, correct COM port, atmega-8 brushless ESC (8kb).

Red wire removed, powered by 11.1v lipo.

I downloaded these firmwares: https://github.com/c---/MultiWii3D/t...tgy_2012-09-30

Not knowing which .hex file I should be using, I pointed at the afro2.hex, set running and things STARTED to look ok ..saying Reading | #### ...

But then it seemed to stop and came up with a repeating "timeout" error

I left it for a bit, but ended up unplugging. I have since tried re-flashing with afro_nfet.hex, but it doesn't event try, just get the timeout error ...

Tried plugging into a motor, it makes a beep, but doesn't arm or run.

Have I 'bricked' the ESC?

What can I do to restore it back to health - Help!
You're going to have to remove the heatshrink and connect up a usbasp programmer to program them from scratch as it sounds like you have no boot loader. Afro2.hex is not the same as afro_nfet.hex.
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Old Dec 19, 2014, 04:03 AM
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Joined Mar 2013
91 Posts
Quote:
Originally Posted by Steveis View Post
You're going to have to remove the heatshrink and connect up a usbasp programmer to program them from scratch as it sounds like you have no boot loader. Afro2.hex is not the same as afro_nfet.hex.
Thanks for the tip, I dusted off my USBasp made the 'worrying' connections and it flashed with afro_nfet.hex OK, so it is 'alive' again and I can flash through the JR connector with the Afro USB programmer. Very grateful for your assistance.

I still don't know what I am supposed to flash my ESCs with to make them 3D reversible though.

Or am I going about this the wrong way thinking I need to have a 3D specific flash on the ESC when I don't i.e. as long as I have the latest afro_nfet.hex then the multiwii control board (3D flashed) will tell the ESCs what to do and the afro_nfet.hex will already understand? There is no 3D specific ESC firmware?
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Old Dec 19, 2014, 04:39 AM
AVR Dude
United Kingdom, England, Cnwll
Joined Jul 2011
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Quote:
Originally Posted by multicopterMick View Post
Thanks for the tip, I dusted off my USBasp made the 'worrying' connections and it flashed with afro_nfet.hex OK, so it is 'alive' again and I can flash through the JR connector with the Afro USB programmer. Very grateful for your assistance.

I still don't know what I am supposed to flash my ESCs with to make them 3D reversible though.

Or am I going about this the wrong way thinking I need to have a 3D specific flash on the ESC when I don't i.e. as long as I have the latest afro_nfet.hex then the multiwii control board (3D flashed) will tell the ESCs what to do and the afro_nfet.hex will already understand? There is no 3D specific ESC firmware?
For safety reasons, the 3D ESC firmware is not in the kkflashtool. The file you require is here:

http://www.rcgroups.com/forums/showp...&postcount=958
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Last edited by Steveis; Dec 19, 2014 at 04:47 AM.
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