Arduino code used in teaching robots:

• 6-wheel Mars Rover with 17 sensors, inluding IMU and ultrasonic sensor array
• 4-wheel robot with Lidar
• 2-wheel robot with ESP8266

The target cost of the 6-wheel rocker-bogie robot is under $150.

The 4-wheel robot uses aluminum parts and higher level components with advanced mapping capabilities. Its target cost is below $300.

The 2-wheel robot has minimum number of sensors. It can act as an web server or web client and can be controlled by cell phones and similar Wi-Fi devices. It can be programmed for swarm operations supported by external cameras connected to Raspberry PI and similar hosts. Its target cost is below $50.