I disconnected the servo from D0 on my Adventure Bot and connected GND on D0 (Black Pins) to Pin 6 on Create 2 connector (GND)-(Pin 7 also a GND pin on Roomba). I connected D0 Output (White Pins) to pin 3 on Roomba (Receive Pin).
The Create 2 communicates at 115K Baud as does the newer Roombas. I tried checking the "use old protocol" and leaving it unchecked and got very intermittent operation of the Create 2 Robot. Seems like it got commands sometimes but was extremely intermittent and not useable.
I know the EZ-BV4 only puts out 3.3 volts on the digital output pins and the Create 2 is expecting 5 volts. This could be an issue but after looking at the Roomba/Create threads this appeared not to be a problem in successfully using the ARC Roomba Movement Panel with the Create/Roomba Robots. It did appear that the threads all referred to the original Create Robot and I have the newer Create 2. I tried changing the configuration settings of the Movement Panel with not much luck. Just very intermittent operation of Create 2 Robot.
I used pin 6 as my ground on the Create 2 connector as ground and some others have used pin 7 on the older Create Robot. These pins should both be the same. (Battery Grounds).
I saw one thread where someone used a level shifter PCB from Sparkfun to convert the 3.3 Volts of the EZ-BV4 to 5 volts for input on the Robot receive input.
Not sure how they did this as neither the Roomba's or Create 2 bring 5 volts out to the connector (7-pin). Actually there was a 25 pin connector in the payload area of some older Create Robots that may have brought 5 volts and GND out on the connector for user use. However the newer Create 2 robots don't have this connector.
Has anyone successfully used a Create 2 Robot with ARC Roomba Movement Panel and if not has anyone created scripts to simulate the Movement Panel for the Create 2 Robot?
Any ideas on why the intermittent operation of the Create 2 Robot would be much appreciated. The Create 2 looks like a really good robot for control via the EZ-BV4 controller. Thanks in advance for the help ! Rick