I'm new to robotics and any hardware related stuff, so please bear with me. I connected a Hitec HS-322HD servo to the BAM module on an iRobot Create, with the yellow wire connected to one of the digital outputs, the black wire connected to ground, and the red wire connected to power (I tried Vpw, Vsw, and +5V with the same results---which is best to use?), and when I turn on the robot, the servo jitters (moves a little back and forth once). The manual says that the digital output should be on high for three seconds, but I'm pretty sure the jitter happens after the three seconds; it happens right after the light flashes and before the robot makes a sound. Also when I send a digital output signal to the robot (using a Python wrapper over the OI), nothing happens, but when I set the digital output to low again, the servo jitters.
Thus, it seems like in both cases when the digital output transitions from on to off is the only time it does something. Do you have any idea what I'm doing wrong? I tried an independent robot, servo, and BAM with the same results.
Thanks in advance!