Control up to 8 DC motors through Wemos Motor Shield with Arduino.

This library is intended to replace the original library, lacking of good design and minor facilities like getter methods. Note that the original firmware has a major bug that blocks the entire I2C bus after few seconds of inactivity. This library mitigates such effect providing a method to force shield update, to avoid too long period of inactivity. Its up to the use to timely call this method. Even if this library works with original bugged firmware , I suggest an alternative firmware solving definitively this bug.

• Controls up 2 motor per shield
• Control speed
• Control direction
• Short brake
• Standby mode to save energy
• Set PWM frequency

Instantiate the controller providing its i2c address:

MotorController motorController(0x30);

Initialize the I2C bus and the controller:

Wire.begin();
motorController.begin();

Turn on the motor:

Motor& motor = motorController.getFirst();
motor.setSpeed(100);

Stop the motor:

motor.setSpeed(0);

For a more comprehensive understanding, look at the examples or at the header files of the library.

The Wemos Motor Shield provides only 4 I2C selectable addresses, hence you can have only 4 Shield attached to the MCU. This leads to maximum 8 motors attached. You may use a I2C multiplexer to support more motors, or you can design your own shield supporting more I2C solder pads, or you can design a shield support more than just 2 motors, or you can use the module to support I2C selection through I2C itself (like new Lolin Motor Shield).