Hello, I'm using two Arduino Uno R3 boards and i want to use I2C to have one Arduino send joystick signals (I'm using 2 analog joysticks including SW) to another Arduino that will read the signals and control DC motors (5 analog servos on three MDD10A Cytrons) based on the signals (each motor operates on one axis and the 5th motor operates on SW inputs). When using this system the motors don't operate in association with the inputs.
master code:
#include <Wire.h>
// Pin definitions for pushbutton
const int buttonPin = 2; // Change this pin according to your setup
void setup() {
Wire.begin(); // Join I2C bus (address optional for master)
Serial.begin(9600); // Start serial for output
pinMode(buttonPin, INPUT_PULLUP); // Setup pushbutton pin
}
void loop() {
// Read joystick values for X and Y axes
int joystick1X = analogRead(A0); // Read X axis for joystick 1
int joystick1Y = analogRead(A1); // Read Y axis for joystick 1
int joystick2X = analogRead(A2); // Read X axis for joystick 2
int joystick2Y = analogRead(A3); // Read Y axis for joystick 2
// Read pushbutton state (LOW when pressed)
int buttonState = digitalRead(buttonPin);
// Send joystick values and pushbutton state to slave (peripheral)
Wire.beginTransmission(8); // Begin transmission to slave address #8
Wire.write(joystick1X >> 8); // Send high byte of joystick 1 X
Wire.write(joystick1X & 0xFF); // Send low byte of joystick 1 X
Wire.write(joystick1Y >> 8); // Send high byte of joystick 1 Y
Wire.write(joystick1Y & 0xFF); // Send low byte of joystick 1 Y
Wire.write(joystick2X >> 8); // Send high byte of joystick 2 X
Wire.write(joystick2X & 0xFF); // Send low byte of joystick 2 X
Wire.write(joystick2Y >> 8); // Send high byte of joystick 2 Y
Wire.write(joystick2Y & 0xFF); // Send low byte of joystick 2 Y
Wire.write(buttonState); // Send pushbutton state (1 byte)
Wire.endTransmission(); // End transmission
delay(100); // Delay to avoid flooding the I2C bus
}
slave code:
#include <Wire.h>
// Pin definitions for motors
const int motorPins[] = {3, 5, 6, 9, 10}; // 5 motors connected to these pins
const int numMotors = 5;
void setup() {
Wire.begin(8); // Join I2C bus with address #8 (slave address)
Wire.onReceive(receiveEvent); // Register event for receiving data
// Set motor pins as outputs
for (int i = 0; i < numMotors; i++) {
pinMode(motorPins[i], OUTPUT);
}
}
void loop() {
delay(100); // Wait for data to arrive
}
// Function that executes whenever data is received from the master
void receiveEvent(int howMany) {
if (Wire.available() >= 11) { // Check if enough data (11 bytes) is available
// Read joystick values for both joysticks and pushbutton state
int joystick1X = Wire.read() << 8 | Wire.read(); // Joystick 1 X
int joystick1Y = Wire.read() << 8 | Wire.read(); // Joystick 1 Y
int joystick2X = Wire.read() << 8 | Wire.read(); // Joystick 2 X
int joystick2Y = Wire.read() << 8 | Wire.read(); // Joystick 2 Y
int buttonState = Wire.read(); // Pushbutton state
// Map joystick values to motor speeds (adjust these ranges as necessary)
int motorSpeed1 = map(joystick1X, 0, 1023, 0, 255);
int motorSpeed2 = map(joystick1Y, 0, 1023, 0, 255);
int motorSpeed3 = map(joystick2X, 0, 1023, 0, 255);
int motorSpeed4 = map(joystick2Y, 0, 1023, 0, 255);
int motorSpeed5 = buttonState == LOW ? 255 : 0; // Turn motor 5 on if button is pressed
// Control motors using PWM (adjust motor pins as needed)
analogWrite(motorPins[0], motorSpeed1);
analogWrite(motorPins[1], motorSpeed2);
analogWrite(motorPins[2], motorSpeed3);
analogWrite(motorPins[3], motorSpeed4);
analogWrite(motorPins[4], motorSpeed5);
// Print the joystick and button states for debugging
Serial.print("Joystick 1 X: ");
Serial.print(joystick1X);
Serial.print(" Y: ");
Serial.print(joystick1Y);
Serial.print(" Joystick 2 X: ");
Serial.print(joystick2X);
Serial.print(" Y: ");
Serial.println(joystick2Y);
Serial.print("Button: ");
Serial.println(buttonState);
}
}
Could this issue be solved by changing the master to an Arduino Mega?
Any help is greatly appreciated!
