[NXTNiklas]

Hello everyone,

I'm trying to connect the CC3D to a Raspberry Pi.
I tried the steps explained here: https://forum.librepilot.org/index.php?action=profile;area=showposts;u=4390

First it worked, but after a while it stopped working... Now I can't get it to connect anymore.
I tried to get the newest firmware, but the GCS download is older than the bitbucket one.
Is there a way to get more control of which UAVObjects are used? Or an easy way to get matching firmwares?

Another question is, whether the CC3D needs to be fully set up (e.g. after upgrade and erase)?

Thanks in advance!

[TheOtherCliff]

All versions must match to communicate well.

When you change a UAVO (XML file or header file produced from XML) you must rebuild everything so that it knows the new checksum of the new UAVO.

[f5soh]

Latest Next build is LibrePilot-16.09+r541-g8935906_i686.exe and will match the current bitbucket Next

[TheOtherCliff]

Another question is, whether the CC3D needs to be fully set up (e.g. after upgrade and erase)?

The exact definition of that is whether any UAVO (xml source file) setting that you have non-default settings in (as set by GCS) got modified by code changes (in the xml file) from one version to the other version.

If you know for sure where all your non-default settings are (in GCS) you can just look at them to make sure they look correct, for instance, if you see non-default PIDs, you know it got them and you don't need to check each PID individually.

If you do this wrong then you will simply get default settings for the changed UAVOs.

[f5soh]

Another question is, whether the CC3D needs to be fully set up (e.g. after upgrade and erase)?

If you do a Upgrade&Erase the CC3D will lost the USB VCP setting.
The python code works only using a serial port (connected to Main/Flexi port) or VCP set as USB telemetry.

https://forum.librepilot.org/index.php?topic=749.msg12347#msg12347

[NXTNiklas]

Thank you very much! Got the System connected now! Now I'm trying to change the ManualControlCommand.Thrust value, but unfortunally it doesn't affect the Motors. My aim is to set the Thrust via USB, is it possible to do so?
Do you have an example for me, if it's possible?

[f5soh]

Look the driveServo function inside example.py file.

Board need to be armed first if you want to run motors.

[NXTNiklas]

Yes, I looked into example.py, and the driveServoFunction works. But I would like to set the Throttle/Thrust value, so the Board keeps in stabilisation mode, rather than controlling every single Motor...

Thanks for the fast reply!

[f5soh]

yes, didn't make sense controlling every motor...

Try ManualControlCommand

[NXTNiklas]

I tried:

Code: [Select]

        self.objMan.ManualControlCommand.metadata.access = UAVMetaDataObject.Access.READONLY
        self.objMan.ManualControlCommand.metadata.updated()
        print "Got it!"
        while True:
            self.objMan.ManualControlCommand.Thrust.value = 0
            self.objMan.ManualControlCommand.updated()
            time.sleep(1)
            print "sleep"
            self.objMan.ManualControlCommand.Thrust.value = 1
            self.objMan.ManualControlCommand.updated()
            time.sleep(1)

But it just doesn't power the Motors... (Thrust should be -1 ; 1)

[f5soh]

Is the board Armed ?

Remove propellers !

[NXTNiklas]

if i do:

Code: [Select]

print self.objMan.FlighStatus.Armed.value

it returns 0 which is unarmed... So maybe there is the Problem...
Is it possible to set this value to armed?

EDIT:

Now armed it via Remote Control, it returns 2, but still the motors don't move... But

Code: [Select]

   self.objMan.ManualControlCommand.metadata.access = UAVMetaDataObject.Access.READONLY seems to work, can't control via remote until reboot

[f5soh]

Set how the board is armed in GCS: Config > Input > Arming settings

At Low Throttle (-1), "move" one stick you choose for arming
Apply Throttle.
Board will still Armed or disarm after a timeout if Throttle returns to -1

[NXTNiklas]

Tried to do what you said:

Code: [Select]

def driveServo(self):
        print "Taking control of self.actuatorCmd"
        self.objMan.ActuatorCommand.metadata.access = UAVMetaDataObject.Access.READONLY
        self.objMan.ActuatorCommand.metadata.updated()
        self.objMan.ManualControlCommand.metadata.access = UAVMetaDataObject.Access.READONLY
        self.objMan.ManualControlCommand.metadata.updated()
        print "Got it!"
        print "starting Arming:"
        self.objMan.ManualControlCommand.Throttle.value = -1
        self.objMan.ManualControlCommand.updated()
        self.objMan.ManualControlCommand.Pitch.value = -1
        self.objMan.ManualControlCommand.updated()
        self.objMan.ManualControlCommand.Throttle.value = 1
        self.objMan.ManualControlCommand.updated()

        time.sleep(1)
        while True:
            print self.objMan.FlightStatus.Armed.value
            self.objMan.ManualControlCommand.Throttle = 1
            self.objMan.ManualControlCommand.updated()
            time.sleep(1)
            print "sleep"
            self.objMan.ManualControlCommand.Thrust.value = 1
            self.objMan.ManualControlCommand.updated()
            time.sleep(1)



(Arming Settings: Pitch forward) Arming doesn't work... I don't know why :/

Could it be, that there is a problem with failsafe settings? Because I don't use a Remote Control...

[NXTNiklas]

Okay, I tried something else:
When i remove

Code: [Select]

self.objMan.ManualControlCommand.metadata.access = UAVMetaDataObject.Access.READONLY
the motors start to move a little...

The values get erased immediatly