Megapirate X STM32 based UAV board - Page 2 - RC Groups
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This thread is privately moderated by Syberian, who may elect to delete unwanted replies.
Jun 26, 2012, 09:49 AM
Originally Posted by Syberian
Then it must be possible to add a cardreader
Why bother with hardware? I can make something like a 'config dump' in the GCS to save and restore a whole configuration in a file.
Of course.
But if you don't want to start your computer or carry everything outside?

It was just an idea.

A 'config dump' could also be usefull.
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Jun 26, 2012, 09:54 AM
Syberian's Avatar
uh oh pls re-read the post - it has been edited
Jun 29, 2012, 01:31 PM

Discovery arrived and FW installed succesfully.
Now i'm waiting for the AT24C64.
How i must connect 24C64/Discovery/5v-allinone?

Is this right?
Jun 29, 2012, 02:38 PM
Syberian's Avatar
Everything is ok but at24c64:
tie a2 to 3.3v; a0,a1 and WP to gnd.
Jul 01, 2012, 12:31 PM
Syberian's Avatar
FW 2.0.1606 + GCS update

I have finished developing an AAT board. It provides a fast one-way telemetry @ video, ground antenna tracking and 3 amps power source for antenna tracker servos.
Feature list:
- power source 7.2-42V with polarity protection
- high-impedance video input: no need for video splitter
- pan-tilt 5V servo outputs with 3 amps constant load
- USB-mini socket for PC connection
- Megapirate X GCS fast one-way telemetry: Attitude, navigation, RC inputs and outputs, targets and waypoints - all @10Hz.
- mode LED: slow blink - no video signal, fast blink - video has no telemetry info, constantly ON - telemetry OK
- all settings are stored in the AP board and can be set via GCS
- configurable neutral, endpoints and servo speed for both channels

This is a short vid of my ugly DIY antenna tracker in action with Megapirate X
Megapirate X antenna tracker test (0 min 22 sec)

I've just ordered several PCBs to the board manufacturer. I doubt it will cost more than $40-$50 for end user.

The first DIY AAT board photo:
Last edited by Syberian; Jul 01, 2012 at 12:44 PM.
Jul 03, 2012, 10:02 AM
Looks interresting.

Whats on the board?
Atmega 328, ftdi and step down module?

The parts are all arrived!
Now i need to solder the board.
I hope i finished it to the weekend! (my wife is making a little bit trouble )

Jul 03, 2012, 10:50 AM
Syberian's Avatar
Du bist das Medium!

Looking forward for your progress.
Jul 03, 2012, 12:09 PM
Wife not at home!
Solder a little bit.

Thats my current state.
GPS, RC and APC not connected/soldered.
How i must setup my APC?

Jul 03, 2012, 12:26 PM
Syberian's Avatar
1) it seems you did not set the defaults - all params are zero. Click the 'emergency trigger' and then press 'restore defaults' button.
2) APC: see the attached picture. Set the same NET IDs but different Node IDs (increase by 1)
Jul 04, 2012, 01:25 AM
Thank you.
But i only thought about the speed.

Originally Posted by Syberian
- two-way telemetry via external modem at a very low speed - 9600 baud
Jul 04, 2012, 01:47 AM
Syberian's Avatar
There is a difference between the port speed and actual data rate. The speed 9600 mentioned in your post is the maximum aerial data rate. I.e it will be no problem to change the port speed to value different from 57600 if anyone needs it.
Jul 06, 2012, 08:08 AM
I think this evening i will try the maiden flight.
But at the moment i can't arm the copter.
Maybe i must increase the channels pwm.
It was only a quick test yesterday evening.

Is this right?:
RC1 -> throttle
RC2 -> aile
RC3 -> elev
RC4 -> rudder
RC5-8 works!

I am using a MX-16s with FrSky DHT-U and PPM receiver.
Wich Autopilotfunctions are working in the current (registered) version?

And i have a feature request.
I wan't a follow me function for skiing!!
I don't know how. Maybe simply with a second GPS connected to a second APC?!


Jul 06, 2012, 08:19 AM
Syberian's Avatar
Is this right?:

nooo!!!! the controls layout is classic as it always been in the planes:

1 - roll
2 - pitch
3 - throttle
4 - yaw

outputs for quad X:
1 front left
2 rear right
3 front right
4 rear left

Please check the controls and outputs BEFORE taking off. See manual, Chapter 5.2 Table 2 for RC controls direction.

There are no autopilot functions (return home, waypoints, position hold) for quads now. They`re still under the development. The plane automatic functions are listed in the chapter 3 of the user's manual

The following cam? sounds attractive
Last edited by Syberian; Jul 06, 2012 at 08:27 AM.
Jul 06, 2012, 08:28 AM
Originally Posted by Syberian
Is this right?:

nooo!!!! the controls layout is classic as it always been in the planes:

1 - roll
2 - pitch
3 - throttle
4 - yaw
No problem, i can change the output channels in my transmitter.
Currently i'm using the standard transmitter PPM-Output.
I will try it this evening.

And of course i will check everything BEFORE take off.
Last edited by JaggerMD; Jul 06, 2012 at 08:36 AM.
Jul 06, 2012, 10:33 AM
So, changed channels.
Pitch down -> GCS 2 up
Roll right -> GCS 1 up
Yaw right -> GCS 4 up
Throttle up -> GCS 3 up
But i still can't arm the copter.
In stable or Acro mode.
I've increased channels up from 100% to 150% in steps.

BTW: GPS is not connected
Last edited by JaggerMD; Jul 06, 2012 at 11:03 AM.

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