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ArduRover User Group

Dedicated to the exchange of useful information between members using the Arduino or other families of processors for autonomous rovers.

Members: 462
Latest Activity: 8 hours ago

Before Posting an Issue

Hi All,

Before posting an issue or a problem in the ArduRover Discussion Forum, please check the wiki table of contents, review the firmware release notes in the subforum, and search that subforum for existing answers to your question. Help avoid duplicate threads by finding other members with the same issue and their solution.

When formulating your post, use a descriptive title such as "rover will not navigate to waypoints in the Auto mode" (not "HELP!" or "Problem").

Please include the following information to help diagnose your query:

  • Describe the problem you are having. What is the expected verses the observed behavior?
  • Provide hardware information such as the brand and version of your autopilot, GPS, radio, and compass, as well as any other pertinent details about your rover setup.
  • What version of the APM: ArdurRover2 firmware version are you running?
  • For navigation issues, provide your tlog and/or dataflash log. Click here for instructions on retrieving a dataflash log.

TCIII

Discussion Forum

Apm Rover in tractor setup.

Started by Matthew Reimer. Last reply by Cala 8 hours ago. 139 Replies

I want to use pixhawk with the apm rover firmware to operate an agricultural tractor. I need to set up my tractor as an rc vehicle.  My plan is as follows: any feedback I can get is appreciated.  I…Continue

chassis for Pixhawk-based rover

Started by Michal G. Last reply by Falcon yesterday. 12 Replies

Hello.I was reading through the group and I was trying to figure out the best chassis for my application.I was choosing between Wild Thumper 6WD Chassis and one of Traxxas RC cars (Slash or…Continue

Rover Hold/Delay At Waypoint

Started by tjfhlv. Last reply by Grant Morphett yesterday. 9 Replies

I'm currently testing a rover setup that I need to have go to a waypoint, hold position at that waypoint for a period of time, then simply continue on it's mission. I have looked through this group,…Continue

Help with Pixhawk and TRex dual motor controller

Started by Steven Cohen. Last reply by Steven Cohen on Monday. 8 Replies

I'm a technology instructor at a new Applied Tech HS setting up a long term rover project and working out the kinks over the summer. I will ultimately be using the Dagu wild thumper and a sabretooth…Continue

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Comment by Niall Dempsey on September 26, 2012 at 5:21am

@ Thomas

Found the problem, needed a common ground between APM and Arduino

I've also got a slight problem with the Mission Planner. A lot ot the time it seems to think its an ArduPlane instead of a APMrover. I regularly need to exit MP and restart it to get the APMrover to appear. Anyone else have this problem?

Regards,

Niall

Comment by Niall Dempsey on September 26, 2012 at 1:18am

Thomas - Thanks for your help

I had considered Sabertooth motor speed controllers but I ended up buying from 4QD in the UK and I've been using them for a couple of years with no problems.

In my current setup I'm using an Arduino and it reads the signals from the RC Receiver using CH1val = pulseIn(CH1, HIGH, 20000); and CH2val = pulseIn(CH2, HIGH, 20000); and I can then convert them to the format I need for the 4QD controllers. The problem is that when I try to use the same method with the APM 2.5 the values being read in are not correct. BTW the RC Receiver signals are not PWM there are PPL are far as I remember.

I'll have another go at trying to read the signals from the APM into the Arduino as it seems logical that they should be similar to what the RC Receiver produces.

Thanks again,

Niall


Admin
Comment by Thomas J Coyle III on September 25, 2012 at 3:59pm

Niall,

I have a Dimension Engineering Sabertooth motor speed controller and in the RC mode the steering (aileron) signal determines direction (right/left) and the throttle signal determines the speed forward or backwards. This works with the APM 1 aileron and throttle signals for skid steering. I do not think that your speed controllers will work because you have no way to use the aileron signal for direction control in your setup. An Arduino Uno could be used to interpret the aileron signal to provide speed signals to the individual controllers to provide direction control. I have used an Arduino Uno to read PWM signals from an RC receiver so I know that it can be done. Try the Arduino Forum.

Regards,

TCIII

Comment by Niall Dempsey on September 25, 2012 at 12:52pm

Hello All,

I purchased the APM 2.5, uBlox GPS and 3DR Radio Kit and got it up and running with the Mission Planner. I now want to use this with an AGV that has tank steering. The 2 motor speed controllers I'm using have inputs for a PWM signal with a range 0 to 255 for motor speed and High/Low digital signal for Forward/Reverse.

It has been suggested that using Ailerons Mixing should provide what I need but the only parameter I could find was Elevon_Mixing and setting this to 1 does not seem to do what I want and even if it did the values would be in the wrong range.

I've had a look through the code but I'm finding it difficult to understand so as a temporary measure I tried using a second Arduino to read the outputs from Ch1 and Ch3 using PulseIn() but this doesn't read the values correctly. 

If anybody has got tank steering to work with APMrover2 or anybody can help, it would be greatly appreciated.

Thanks,

Niall

Comment by Vincent van Schijndel on September 23, 2012 at 11:18pm

Hello All,

i bought a second hand apm 1, to use with ardurover. looking forward to it, it should arrive in 1-2 weeks. 1 have 1 question. the owner told me i could never use the esc with bec, according to him i always have to take out the red wire from the esc and use a seperate ubec. this because if you plug in the usb without first powering the esc with a battery, there was a chance the esc pulled some power through the usb, causing the bord to blow.

is this correct? are you all using seperate ubecs? i cant find something about it on the forums, thats why i ask:)

thanks in advance!

greets vincent


Admin
Comment by Thomas J Coyle III on September 21, 2012 at 3:01pm

Hi All,

Well, I have got the ball rolling on building an ArduRover. How about some more build logs to give us ideas concerning building our own rovers! Help with hardware and software builds will be greatly appreciated by all.

Regards,

TCIII

Comment by Rich Maynard on September 18, 2012 at 6:48pm

Well if you looking to interface a WII Nunchuck check out

http://arduino.cc/playground/Main/WiiChuckClass

-Rich

Comment by Bradley J Carr on September 17, 2012 at 7:20pm

i really need to learn the programing better.  i am going to go look at the arduino site and see what i can learn.  but i dont understand how to get the pulse width to react to the wii nunchuck

Comment by Rich Maynard on September 17, 2012 at 6:04pm

@Bradley

If you have a couple of questions go ahead an post them. Not to put you off though but there are many examples of using PWM on the Arduino site as well the samples and Library examples that come with the Arduino IDE.

-Rich

Comment by KM6VV on September 17, 2012 at 4:24pm

ROS can run the connect on the turtlebot! 

It also has stacks to run obstacle avoidance, and blob tracking with a CMU camera.

Alan

 
 
 

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