Tutorial SPS - Sabertooth Packet Serial PID motor driver sketch w/SoftStart

The settings are exactly as they are above for simtools I didn't need to change anything from before.

In SMC3 I have the settings low but like I say it works perfectly using the SMC3 utility no jerking nice and smooth.

Soon as I try to test using simtools it's terrible.

Can't upload pics as I'm out at the mo. I will do a video after when I get home, shouldn't be too long

I did the same experience first when beta testing, while SMC3 was working flawlessly I had troubles to get SimTools working. Anyway you are an experienced user ntl there could be something wrong though

Unless there is something specific about the sabretooth version it should be OK. I've always used 1ms on my standard SMC3 on UNO.

You could try using SMC3Utils in UDP passthrough mode to search for problems. It will display a light blue line showing what it receives from simtools and a dark blue line showing the returned value from the arduino (or the other way round?). It might help tell you where the error is introduced?

BTW I assume it's a baud issue.

Yes need to set that up in UDP ...... never had to use it before how do I do it @RufusDufus is it in the SMC3 thread ??

Also tested and failed. I got a lot of communication errors between UNO and Sabertooth resulting in jerky movements.

I changed the rate 112500 in describe for each sabertooth

And SimTools?

OK, that's interesting. I'll have a quick look at the sabretooth code and see if there is anything I can find otherwise I can't offer any other advice at the moment.

Here some screenies






These are the same for all 3 Sabertooths and UNO's

ok, try to set the Sabertooth to BAUD 38400 for testing purposes (Describe)

Sorry to hear your are having issues. I see serial timeout in DEscribe says 0. That screen shot is after running the sketch and download the settings again correct? My plan was to have only one sketch for both sabertooths but in may be necessary to make two, one for the 2x60 and one for the 2x32. The problem may be because the 2x32 is a V3 sabertooth and the 2x60 is V2. After @Pit couldn't get the sketch to work on his 2x32 after I got it working on my 2x60, I had to call DE support to confirm that V3 is not 100% compatible with V2 commands. That's why you must use DEscribe on the 2x32 to set its baud. I forgot to check if the serial timeout was also working or not though and from your screen shot it isn't. That shouldn't be causing your issues but maybe the code for the 2x60 is screwing with the 2x32. I assumed the 2x32 would just discard the V2 commands but maybe its causing the problem. But again, I don't have a 2x32 myself to test with.

Shortly I will be sending you a striped down sketch that @Pit has had success with to try to see if that makes a difference since he said my posted sketch is not working for him now either.

Good idea to try this too. Don't forget to change the baud to 38400 in the sketch to though.

What should I set serial timeout to ?

WIll try this now

Right, I forgot to mention it. Thanks @BlazinH

Its fastest setting, 100ms.

Right, I forgot to mention it. Thanks @BlazinH

change it where ??

I changed it uploaded it and it goes blank again ?

same here