I am new to using TI BLE products. I was using CSR's products before and I thought I would give TI a try.
The documentation / software tools for the SensorTag 2.0 & the DevPack Debugger are spread out all over the TI website. It takes a new user quite a bit of time to figure out which document to read first and what software is needed for development. When you purchase the DevPack Debugger you get one slip of paper that shows a picture of how to connect the debugger to the SensorTag. There is no reference to selecting the XDS110 in CCS which is very important.
Anyway, when you load CCSv6.1 the default debug tool comes up at XDS100v3. I read somewhere that the DevPack Debugger was also called XDS100v3. I tried to debug the SensorTag with CCSv6.1 and kept getting errors that I could not connect.
I hope this is helpful to other users like myself.
Make sure you select XDS110 for the debugger for both the stack project AND the application project. Notice I said XDS110 NOT XDS100v3.
NOTE TO TI: Please reference XDS110 in the web page and other documentation for the DevPack Debugger. I do not see this referenced anywhere. See page for example: www.ti.com/.../cc-devpack-debug;tisearch=Search-EN-Everything