Multiple Serial Port on OpenRB150

[roboteer]

Serial() points to the USB Port on the OpenRB-150, meaning the Serial Monitor tool on your Arduino IDE. And it looks like that first you set Serial() to 57600 bps, then later you change it to 115200 bps >> this is the problem: you need to choose only one baud rate for the Serial Monitor.

Controller.begin(2) means that you are using Serial2 for your RC-100 Controller, this got nothing to do with Serial(). ROBOTIS restricts all their BT-210/410 to 57.6 Kbps.

For more details, see following post:

Using VIN Pin on Dynamixel MKR Shield

I already pointed out your problem in the other post that you made You need to review Section 2.4 of the free KINDLE sample of my Arduino book In summary: Your Pressure device is an I2C device, so just follow the Adafruit instructions. This device got nothing to do with the BT UART Port Serial2(), nor with the DXL Port Serial1(), nor with the Serial Monitor tool Serial() (i.e. the USB Port of the OpenRB-150). To set up the Serial Monitor tool (i.e. Serial()), use either Serial.begin(…