ArduRover User Group

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

Members: 367
Latest Activity: 12 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.


Discussion Forum

High Res GPS ?

Started by heliboy. Last reply by F. C. Bearsch "Tearig" 12 hours ago. 2 Replies

I have playing with ardurover for a while. Great stuff ! Now I have migrated to the pix hawk version and I am working the transition out. My latest robot is a tracked 4000 pound diesel powered…Continue

Pixhawk + Credit card sized PC + camera + OpenCV ...

Started by Raimo Noormaa. Last reply by Interested in Quads Sep 24. 2 Replies

Hi,I started to play around with computer vision - recognizing some patterns is great. Currently do it on my laptop (MS VB + integrated webcam)I would like to hear your comments about using different…Continue

new PIXHAWK APM will not do anything in Auto Mode

Started by heliboy. Last reply by Thomas J Coyle III Sep 21. 7 Replies

Hi All:Decided to bite the bullet and upgrade to PIxhawk. Got everything and everything went smoothly.Used Futaba sbus link from RX to PixHawk. Works fine. CH1 CH2 for speed and steering CH7 - learn…Continue

How to Install Dual Sonars on a Pixhawk

Started by Thomas J Coyle III. Last reply by Thomas J Coyle III Sep 21. 16 Replies

Hi All,I just completed installing dual Maxbotix MB1240 sonars on one of my Pixhawk equipped rovers.Since the sonars were from an APM equipped rover they already had single pair shielded cables…Continue

Tags: install, Pixhawk, dual, sonar

Comment Wall


You need to be a member of ArduRover User Group to add comments!

Comment by Thomas J Coyle III on February 4, 2014 at 2:04pm


I suspect the reason your PX4 is not going into "Hold" at boot up, if the receiver is not linked to the transmitter, is that I am using a Spektrum Remote Receiver and I believe you are not. It is probably the way your receiver handles no transmitter signal.

Also, it might be better if you start a discussion concerning your PX4 Project so that we can capture issues and solutions in one place without them disappearing off of the Comment Wall into the past:-)


TCIII ArduRover2 Developer

Comment by dr0n3droid on February 3, 2014 at 9:27pm
Hey Gary,

Guided mode on it's own is working perfectly.

I was under the impression that follow me used guided mode, that APM is in Guided mode and GCS sends it's updating location as the current destination.

Follow me isn't implemented in APMrover? That would explain why my rover didn't, well...follow me.

I've always considered Hold to be a failsafe mode. The rover equivalent to APMcopter's Land.

I wonder if Hold is used as a pause for missions. Allowing you to resume a mission rather than restarting at WP1.

My rover hasn't moved since the fall...til today.

I waterproofed APM,PM,GPS, and telem. and put on a new set of tires last night. Still no traction. I braved the windy -17°c earlier today. (Manual mode only.)Rover on ice is strangely reminiscent of flying my copter in >25kph wind. All over the place.
Think I'll park the rover, and stay in the air while the temp is below zero.

+1 for extra dedicated switches. Adding Follow Me would be great too.
Steering mode is awesome. Extremely capable of maintaining it's heading despite rough terrain. Love it.

Just noticed that 2.45 has been released. So much for the waterproofing.

Comment by Gary McCray on February 3, 2014 at 6:33pm

Hi Mike,

I did look at the current APMrover code and Guided mode actually is in there and doesn't seem to be disabled.

So it should do something (it isn't follow me though).

It allows you to use a 3DR telemetry radio hooked up to Mission Planner to let you enter a waypoint and then tell it to go to that waypoint.

Then it should go to that waypoint.

Follow me is something else and I don't think that is implemented at all in APMrover.

Comment by dr0n3droid on February 3, 2014 at 12:04pm
Auto missions end in HOLD mode. If Tx/GCS is still in AUTO after final WP, rover will 'HOLD'
I believe(?) rover will also enter HOLD prior to GPS lock, if using a GPS mode.
Loss of Telemetry causes RTL failsafe, or HOLD if no GPS.
I tried Guided mode, well follow-me actually, a few months ago. There was no response from the rover. I did read something shortly thereafter about default GUIDED altitude needing to be set to zero. I'll try it this afternoon.

Comment by Gary McCray on February 2, 2014 at 7:33pm

Short follow up:

Following setting RC3_TRIM to 1500 I have not had the problematic fail into full reverse that I was getting before, so it looks like whatever it is doing is preventing that and I have tried both turning the transmitter back off and on as well as running it hard enough to reset the PX4 (which disarms it).

Putting the PX4 on a Kyosho Zeal mounted sub-platform has also helped a lot with vibration and shocks and integrity.

I feel it is now working well enough for me to at least try some learn and auto mode trials.

I will report back.

I have learned that multi-path in my immediate neighborhood (house and lots of 100' pine trees close at hand) plays havoc with the GPS so I will try this at our community colleges wide open area.

Best Regards,


Comment by Gary McCray on February 2, 2014 at 12:12pm

Hi Again Thomas,

Actually I am hooked up now and my Rover is definitely not responding as you described.

I brought it up on mission planner with the transmitter off and it showed manual mode.

I turned on the transmitter and it still showed manual mode (but did permit switching to learn and auto correctly)

Set it back to manual and turned transmitter off and it still shows manual mode.

This is also reflected in the Mission Planner status page looking at the "mode" value.

Under no circumstances did it go to "Hold" mode.

I am using the latest stable APMrover2 code.

When I shut the transmitter off the throttle does stay at 1502 and turning it back on does (except for the small transmitter requirement to hold the self centering elevator now throttle stick low when starting blip in reverse) seem to work OK.

Actually turning the transmitter off while it is in Auto mode places it in Hold mode, but in manual or learning it just stays in the mode it was in.

Also when you turn the transmitter back on the Auto switch position is now always Hold mode.

Manual and learn switch correctly, but now auto is always Hold.

The only way to get it back correct is to remove power to the PX4 (or Vehicle) and power it back up again.

I suspect this is not the desired outcome.

Best Regards,


Best Regards,


Comment by Gary McCray on February 2, 2014 at 11:33am

Hi Thomas, Thank You.

That actually improves the situation for center throttle systems a lot. A transmitter signal loss automatically going to default means that at least the go full reverse problem can be eliminated most situations.

It is however listed as an official mode and I saw a very recent reference of Tridge switching to it with his transmitter when the Rover was about to do something inappropriate.

I will add the information about automatically going to hold mode if RC reception is lost to the wiki where the other mode information is.

Once it has automatically gone to hold mode (how do you get it back out of it) or does it just go out of Hold mode when RC reception is reacquired? 

My experience might have been the reult of it going into Hold mode because of a temporary loss of RC (before I had correctly set RC3_TRIM to 1502) so it would have gone to minimum PWM which would have resulted in full reverse.

My experience so far has been that no mode switching or transmitter reconnecting would get it back from that mode and only removing the battery would get it back from that mode and only disconnecting the trucks battery had any effect.

In any case if you would let me know what is necessary when it has automatically gone to hold mode to get it back out of it I would appreciate it.

Best Regards,


Comment by Thomas J Coyle III on February 2, 2014 at 6:05am

@ Gary,

I know that the HOLD mode is where the rover will stop or not move if there is a loss of the R/C transmitter signal. If you boot your APM up without your transmitter on, you will see the HOLD mode appear in both the MP and AMP Planner 2.0 HUDs instead of the MANUAL mode. I believe that the APM will go into the HOLD Mode if there is a loss of the R/C signal during operation.

As far as the GUIDED mode goes, this is an Arducopter mode that may not have been implemented in the ArduRover2 code. We have mainly concentrated on the MANUAL, LEARNING, STEERING, and AUTO modes at the moment as those are the basic modes to get a rover going.


You need to provide a list of your parameter settings to see if we can help you out. What version of the code are you using?


TCIII ArduRover2 Developer

Comment by Bruce D. Sidlinger on February 1, 2014 at 10:28pm

Well, the cool one is Steering Mode, I want to go try that!

(My APM 2.0 Axial Wraith drives like a drunken sailor with no destination in mind in Auto so I need a break before further struggling with that problem.)

Comment by Gary McCray on February 1, 2014 at 10:23pm

At this point Bruce I am very uncertain of their veracity, at least Hold and Guided mode, but Learning mode was straight from the release and should work as advertised.

So your results are most definitely (Not Guaranteed).

They will be revised over the next couple of days if needed.


© 2014   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service