STEP 3: For the wall following robot

Also you can mount servo and ultrasonic sensor on the upper plate using the space given on right side to make the Wall Following Robot.

Adding the upper chassis

Last, we mount the upper plate on the standoffs.

The structure for a robot car is complete. We will wire these components and code the evive depending on whether we want a line following bot or an obstacle avoidance robot.

IMP NOTE:-

evive uses PWM Pins 44, 45 for motors and the same are used for

servos, so you CANNOT use plug and play interface for servo motor. You

will have to use any of the 3 to 13 pin for connecting the signal wire

of servo. ALSO since default servo library uses TIMER 5 (aka PWM pins

44, 45) for controlling the servos. SO PLEASE REPLACE THE DEFAULT SERVO

LIBRARY IN ARDUINO LIBRARIES using the attached file "Servo.rar"

So, you are ready to make your desired project with this modular differential drive robot.

You can explore more projects made using evive here. Checkout evive's product video.