ARDBOX Relay ARDUINO based PLC

  int IO2 = analogRead(I0_2);
  int IO3 = analogRead(I0_3);
  int IO4 = analogRead(I0_4);
  int IO5 = analogRead(I0_5);
  int IO6 = analogRead(I0_6);
  int IO7 = analogRead(I0_7);

  int IOO = digitalRead(I0_0);
  int IO1 = digitalRead(I0_1);
  int IO4 = digitalRead(I0_4);
  int IO5 = digitalRead(I0_5);

  #define INTERRUPT I0_0 // other pins: I0_3, I0_2, I0_1

  volatile bool state = false;

  void setup() {
    pinMode(INTERRUPT, INPUT_PULLUP);
    attachInterrupt(digitalPinToInterrupt(INTERRUPT), function_call_back, CHANGE);
  }

  void loop() {
    if (state == true){
      Serial.println("Interrupt activated");
      state = false;
    }
  }

  void function_call_back(){ //Change led state
    state = true;
  }

  analogWrite(A0_0, 255);
  analogWrite(A0_1, 10);

  // CONFIGURE THE RIGHT SWITCH WITH ALL OUTPUT AS ANALOG(OFF)
  analogWrite(Q0_0, 182);
  analogWrite(Q0_1, 30);

  // CONFIGURE THE RIGHT SWITCH WITH ALL OUTPUT AS DIGITAL(ON)
  digitalWrite(Q0_0, HIGH);
  digitalWrite(Q0_1, LOW);

  // Opens the relay switch
  digitalWrite(R1, HIGH);
  digitalWrite(R2, HIGH);
  digitalWrite(R3, HIGH);
  digitalWrite(R4, HIGH);
  digitalWrite(R5, HIGH);
  digitalWrite(R6, HIGH);
  digitalWrite(R7, HIGH);
  digitalWrite(R8, HIGH);

  delay(500);

  // Close the relay switch
  
  digitalWrite(R1, LOW);
  digitalWrite(R2, LOW);
  digitalWrite(R3, LOW);
  digitalWrite(R4, LOW);
  digitalWrite(R5, LOW);
  digitalWrite(R6, LOW);
  digitalWrite(R7, LOW);
  digitalWrite(R8, LOW);

// Include Industrial Shields libraries
#include 

//// IMPORTANT: check switches configuration

////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // Begin serial port
  Serial.begin(9600);

  // Begin RS485 port
  RS485.begin(38400);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  // Wait bytes in the serial port
  if (Serial.available()) {
    byte tx = Serial.read();

    // Echo the byte to the serial port again
    Serial.write(tx);

    // And send it to the RS-485 port
    RS485.write(tx);
  }
}

// Include Industrial Shields libraries
#include 

//// IMPORTANT: check switches configuration

////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // Begin serial port
  Serial.begin(9600);

  // Begin RS485 port
  RS485.begin(38400);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  // Print received byte when available
  if (RS485.available()) {
    byte rx = RS485.read();

    // Hexadecimal representation
    Serial.print("HEX: ");
    Serial.print(rx, HEX);

    // Decimal representation
    Serial.print(", DEC: ");
    Serial.println(rx, DEC);
  }
}

// Include Industrial Shields libraries
#include 
//// IMPORTANT: check switches configuration
//// IMPORTANT: Full duplex mode is only available when device supports it
////////////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // Begin serial port
  Serial.begin(9600);
  // Begin RS485 port
  RS485.begin(38400, FULLDUPLEX);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  // Wait bytes from the RS-485
  if (RS485.available()) {
    byte tx = RS485.read();
    // In full-duplex mode it is possible to send and receive data
    // at the same time in a secure way
    RS485.write(tx);
    // Echo the byte to the serial port
    Serial.write(tx);
  }
}

// Include Industrial Shields libraries
#include 
//// IMPORTANT: check switches configuration
//////////////////////////////////////////////////////////////////////////////////////////////
void setup() {
  // Begin serial port
  Serial.begin(9600);
  // Begin RS232 port
  RS232.begin(38400);
}

///////////////////////////////////////////////////////////////////////////////////////////////
void loop() {
  // Wait bytes in the serial port
  if (Serial.available()) {
    byte tx = Serial.read();
    // Echo the byte to the serial port again
    Serial.write(tx);
    // And send it to the RS-232 port
    RS232.write(tx);
  }   
}

// Include Industrial Shields libraries
#include 

//// IMPORTANT: check switches configuration

//////////////////////////////////////////////////////////////////////////////////////////////

void setup() {

  // Begin serial port
  Serial.begin(9600);

  // Begin RS232 port
  RS232.begin(38400);

}

//////////////////////////////////////////////////////////////////////////////////////////////

void loop() {
  // Print received byte when available
  if (RS232.available()) {
    byte rx = RS232.read();

    // Hexadecimal representation
    Serial.print("HEX: ");
    Serial.print(rx, HEX);

    // Decimal representation
    Serial.print(", DEC: ");
    Serial.println(rx, DEC);
  }
}

#include 

void setup() {
  Wire.begin();
  Serial.begin(9600);
  while (!Serial); // Leonardo: wait for Serial Monitor
  Serial.println("\nI2C Scanner");
}

void loop() {
  int nDevices = 0;
  Serial.println("Scanning...");

  for (byte address = 1; address < 127; ++address) {
    Wire.beginTransmission(address);
    byte error = Wire.endTransmission();

    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address < 16) {
        Serial.print("0");
      }
      Serial.print(address, HEX);
      Serial.println("  !");
      ++nDevices;
    } else if (error == 4) {
      Serial.print("Unknown error at address 0x");
      if (address < 16) {
        Serial.print("0");
      }
      Serial.println(address, HEX);
    }
  }

  if (nDevices == 0) {
    Serial.println("No I2C devices found\n");
  } else {
    Serial.println("done\n");
  }
  
  delay(5000); // Wait 5 seconds for next scan
}

// include the SPI library:
#include 

// set pin 10 as the slave select for the digital pot:
const int slaveSelectPin = 10;

void setup() {
  // set the slaveSelectPin as an output:
  pinMode(slaveSelectPin, OUTPUT);
  // initialize SPI:
  SPI.begin();
}

void loop() {
  // go through the six channels of the digital pot:
  for (int channel = 0; channel < 6; channel++) {
    // change the resistance on this channel from min to max:
    for (int level = 0; level < 255; level++) {
      digitalPotWrite(channel, level);
      delay(10);
    }
    // wait a second at the top:
    delay(100);
    // change the resistance on this channel from max to min:
    for (int level = 0; level < 255; level++) {
      digitalPotWrite(channel, 255 - level);
      delay(10);
    }
  }
}

void digitalPotWrite(int address, int value) {
  // take the SS pin low to select the chip:
  digitalWrite(slaveSelectPin, LOW);
  // send in the address and value via SPI:
  SPI.transfer(address);
  SPI.transfer(value);
  // take the SS pin high to de-select the chip:
  digitalWrite(slaveSelectPin, HIGH);
}