Pololu Simple High-Power Motor Controller 18v25

/*
The Pololu Simple High-Power Motor Controller 18v25 is a versatile motor controller that supports various communication protocols like TTL serial, I2C, and USB. In this example, I'll provide you with an Arduino code to control a motor using the TTL serial interface. Note that this code assumes you are using an Arduino Uno or a similar board.

First, connect the motor controller to the Arduino as follows:

TX (Arduino) to RX (Motor Controller)
RX (Arduino) to TX (Motor Controller)
GND (Arduino) to GND (Motor Controller)
Connect the motor to the motor controller's output and supply power to the motor controller as per your motor's requirements.

Upload this code to your Arduino. The motor will run at a speed of 127 in the forward direction for 2 seconds, then brake for 2 seconds. This process will repeat indefinitely. You can change the speed and brake values as needed.
*/

// Pololu Simple High-Power Motor Controller 18v25
// Example code for Arduino

#include <SoftwareSerial.h>

// Motor Controller Pins
const int rxPin = 10; // Connect the RX pin of the motor controller to Digital Pin 10
const int txPin = 11; // Connect the TX pin of the motor controller to Digital Pin 11

// Create a SoftwareSerial object for communication with the motor controller
SoftwareSerial motorControllerSerial(rxPin, txPin);

// Motor controller command IDs
const byte SET_SPEED = 0x85;
const byte SET_BRAKE = 0x92;

void setup() {
  Serial.begin(9600); // Initialize the serial communication for debugging
  motorControllerSerial.begin(9600); // Initialize the software serial communication with the motor controller
}

void loop() {
  int speed = 127; // Speed range: -3200 to 3200 (use -127 to 127 for full range)
  setMotorSpeed(speed);
  delay(2000); // Run the motor for 2 seconds

  setBrake(32); // Brake strength: 0 to 32
  delay(2000); // Brake for 2 seconds
}

void setMotorSpeed(int speed) {
  if (speed < 0) {
    motorControllerSerial.write(0x86); // Reverse direction
    speed = -speed;
  } else {
    motorControllerSerial.write(0x85); // Forward direction
  }

  // Ensure speed is within allowed range
  if (speed > 3200) {
    speed = 3200;
  }

  // Send speed value (split into two bytes)
  motorControllerSerial.write(speed & 0x1F);
  motorControllerSerial.write((speed >> 5) & 0x7F);
}

void setBrake(byte brake) {
  motorControllerSerial.write(0x92);
  motorControllerSerial.write(brake & 0x1F);
}