Hello everyone!
I am working on a project and deadline is coming closer and closer. Our prof wants us to use TGY-S518D, which is a clone of Dynamixel MX28R. We need to control it using Arduino UNO board. Basically, all we need is a simple position control with some IF logic. Right now I cannot even move it, it does not respond to any codes with different libraries.
I have already tried:
May be, I simply did not connect properly before applying first two ones, but the third one was connected as shown in the pdf file. Probably the problem is that I have 4pin servo with half duplex D+/D- pins and the third library is designed for TTL/3pin servo.
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I connected the smallest violet wire directly to D- pin instead of connecting it to long violet wire. However, motor does not respond anyhow. I just dont know what to do 
This is the first time I am working with something like dynamixel. Earlier I did have experience only with simple servo and DC motors. I am stacked and dont know what to do and which library to use. My peers said me to use USB2Dynamixel with some C/C++ code instead of trying to connect the motor to the Arduino UNO. However, we need the board for other parts of our project too. It would be not convenient to apply servo control with some separate parts
Please, help me!