hi, i use ros indigo on my PC and i install with git rosarduinobridge. i configure port and baud with 57600. when i run roslaunch ros_arduino_python arduino.launch i receive this:

Connecting to Arduino on port /dev/ttyACM0 ... Traceback (most recent call last): File "/home/pi/catkinws/src/rosarduinobridge/rosarduinopython/nodes/arduinonode.py", line 195, in myArduino = ArduinoROS() File "/home/pi/catkinws/src/rosarduinobridge/rosarduinopython/nodes/arduinonode.py", line 87, in init self.controller.connect() File "/home/pi/catkinws/src/rosarduinobridge/rosarduinopython/src/rosarduinopython/arduinodriver.py", line 68, in connect test = self.getbaud() File "/home/pi/catkinws/src/rosarduinobridge/rosarduinopython/src/rosarduinopython/arduinodriver.py", line 261, in getbaud return int(self.execute('b')); File "/home/pi/catkinws/src/rosarduinobridge/rosarduinopython/src/rosarduinopython/arduinodriver.py", line 178, in execute return int(value) TypeError: int() argument must be a string or a number, not 'NoneType' [INFO] [WallTime: 1468839317.723302] Stopping the robot... [INFO] [WallTime: 1468839317.724447] Shutting down Arduino Node... [arduino-2] process has died [pid 3268, exit code 1, cmd /home/pi/catkinws/src/rosarduinobridge/rosarduinopython/nodes/arduinonode.py _name:=arduino _log:=/home/pi/.ros/log/17f4efd0-4cd6-11e6-bdc9-b4b676bf3056/arduino-2.log]. log file: /home/pi/.ros/log/17f4efd0-4cd6-11e6-bdc9-b4b676bf3056/arduino-2*.log

Edit: myarduinoparams.yaml

port: /dev/ttyACM0
baud: 57600
timeout: 0.1

rate: 50
sensorstate_rate: 10

use_base_controller: False
base_controller_rate: 10

# For a robot that uses base_footprint, change base_frame to base_footprint
base_frame: base_link

# === Robot drivetrain parameters
#wheel_diameter: 0.146
#wheel_track: 0.2969
#encoder_resolution: 8384 # from Pololu for 131:1 motors
#gear_reduction: 1.0
#motors_reversed: True

# === PID parameters
#Kp: 10
#Kd: 12
#Ki: 0
#Ko: 50
#accel_limit: 1.0

# === Sensor definitions.  Examples only - edit for your robot.
#     Sensor type can be one of the follow (case sensitive!):
#     * Ping
#     * GP2D12
#     * Analog
#     * Digital
#     * PololuMotorCurrent
#     * PhidgetsVoltage
#     * PhidgetsCurrent (20 Amp, DC)
sensors: {
  #motor_current_left:   {pin: 0, type: PololuMotorCurrent, rate: 5},
  #motor_current_right:  {pin: 1, type: PololuMotorCurrent, rate: 5},
  #ir_front_center:      {pin: 2, type: GP2D12, rate: 10},
  #sonar_front_center:   {pin: 5, type: Ping, rate: 10},
  arduino_led:          {pin: 13, type: Digital, rate: 5, direction: output}
}