Search found 33 matches
- Mon Sep 04, 2017 3:52 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
I am connected to the board directly to the usb port. As you suspected a timing issue, I inserted a delay not every loop, but between every read of encoder or speed (i.e. in practice every _sendcommand call) as the I am using roboclaw_read.py which performs 4 reads in a row. So far, with a delay of:...
- Thu Aug 31, 2017 3:04 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
All problems are from kernel 4.10 (tested with 4.12, same issues). I don't have the issue with the roboclaw_readversion.py example (cycles are too slow i guess), but with roboclaw_read.py (fails in less than 2 minutes). I traced the blocking point to the function "def _sendcommand(self,address,...
- Wed Aug 30, 2017 3:05 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
Same issue when using ubuntu 17.04 (kernel 4.10 by default)
- Wed Aug 30, 2017 1:35 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
Same issue when using python3
- Wed Aug 30, 2017 12:41 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
FYI, in order to check if it was ROS dependent, I dowloaded the last python library available on your website and tried:
With kernel 4.8, no problem, with kernel 4.10 and 4.12, it stops after a few cycles.
Code: Select all
python roboclaw_read.py
- Thu Aug 24, 2017 4:29 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
Okay,
I will report my findings here when I will have time to debug.
For now I can just tell you that the node is not crashing, the cummunication just stops.
I will report my findings here when I will have time to debug.
For now I can just tell you that the node is not crashing, the cummunication just stops.
- Tue Aug 22, 2017 9:00 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
Turn out that it is going to be an issue for us not to be able to use linux kernel 4.10. Should I open a separate thread ?
- Thu Aug 17, 2017 5:37 am
- Forum: General Discussion
- Topic: Serial Communications problem using Linux Kernel 4.10 and 4.12
- Replies: 27
- Views: 27583
Re: Losing communication with Roboclaw,TTL serial and Raspberry PI
Hello, Having a similar problem with my custom ROS driver which uses the python driver. I traced back the issue to the update of the linux kernel. Same computer, ubuntu 16.04. With kernel 4.8 it works perfectly, with kernel 4.10, the communication stops after few seconds. Connected directly to the U...
- Tue Nov 22, 2016 2:40 am
- Forum: General Discussion
- Topic: Python mixed SpeedAccel command not working
- Replies: 5
- Views: 6840
Re: Python mixed SpeedAccel command not working
Just had a new look on this. I manage to get the desired behavior using the following function (i missed it last time):
SpeedAccelDistanceM1M2_2
SpeedAccelDistanceM1M2_2
- Fri Nov 18, 2016 12:27 am
- Forum: General Discussion
- Topic: Roboclaw 2x60A V5 usb slot came off
- Replies: 8
- Views: 9456
Re: Roboclaw 2x60A V5 usb slot came off
Thanks for your answer, we ordered a new one in order not too loose too much time but I sent an email to the customer support to make a repair anyway. We will take extra care of the usb slot from now, but for your information, we used a 2x15a roboclaw in the exact same configuration and never had an...