Resolved by thetechguru!
Hello Everyone,
I have been at my workbench reading all of the Sabertooth threads in the forum and for the life of me can not figure out how to get my sabertooth to do variable speed over the serial 9600 baud connection. Here's what I am trying to do.......
I am building an R2 unit and need him to drive in tank mode using a virtual joystick in my iPhone. The farthest I've gotten is connecting the Sabertooth per the tutorial and I did manage to get it to control the for directions but only in full speed. I guess what I'm trying to do is get the EZB to act like an RC controller. I ordered a kangaroo yesterday because I saw some of you have had success with it. I'm not a coder by any means, I'm much more mechanical in skill but I love working with the EZB and I don't want to take the easy way out and just go RC.
The threads I've seen so far are pretty fragmented because it looks like this has been figured out but not fully explained (dumbed down for someone like me. I am using the Sabertooth 2x32 at 24v powering two scooter motors for R2's foot drives and a Syren 10 for his dome drive also at 24v. I hate asking for help because I'm sure the answer is out there in another thread but for the life of me I can't seem to find it or understand it. stress
R2 is all aluminum weighing in at 160lbs so I don't want him flying into a crowd of people even though I do have a remote key fob kill switch. 
Thanks for any help!
Douglas
Start with one of the sample apps like Roli, which has a Movement Panel for an H-Bridge (although a different one for a Sabertooth) but it will show you how the movement control is built. In fact, the Roli project also shows how to build a joystick like control using script buttons since it has movement and camera control (the camera control drives scripts).
There is a tutorial on building mobile apps here:
https://synthiam.com/Tutorials/Help.aspx?id=196
Alan
Thank you Alan! That is a great suggestion!
:D
The scripts for ramping the ST are ok and do the job. However you will get a much smother ramping effect if you enable it's built in ramping. Download the DEScribe software and hook it up to the Sabertooth. You'll be able to control the amount of ramping you need a lot easier than a outside script pulsing the signal to achieve a ramping effect. In the end, once you learn how to use the software, it's a much easier and more elagent solution.
That R2 is really a nice looking bot and a real sweet and clean looking wiring job. You've put this much effort into building a perfect bot, you should really learn how to control the devices that make him run. You'll be much happier, you'll have better control and it'll run smother.
Hi Dave,
I started playing with the describe software yesterday. I didn't know it could control ramping! Thank you for that info. I'll take a look at it again tonight. I really want my R2 to be as tight as possible.
Thank you!
Douglas
Photos reoriented at end.
That's one beautiful robot. My mouth is watering.
indeed, i would love to have the skills and patience to build something like yours.
Awesome looking build.
Alan