FirmataSerialDisplay

#include <LiquidCrystal.h>

#include <Firmata.h>

byte pin;

int analogValue;
int previousAnalogValues[TOTAL_ANALOG_PINS];

byte portStatus[TOTAL_PORTS];	// each bit: 1=pin is digital input, 0=other/ignore
byte previousPINs[TOTAL_PORTS];

/* timer variables */
unsigned long currentMillis;     // store the current value from millis()
unsigned long previousMillis;    // for comparison with currentMillis
/* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you
   get long, random delays.  So only read analogs every 20ms or so */
int samplingInterval = 19;      // how often to run the main loop (in ms)

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

void sendPort(byte portNumber, byte portValue)
{
  portValue = portValue & portStatus[portNumber];
  if (previousPINs[portNumber] != portValue) {
    Firmata.sendDigitalPort(portNumber, portValue);
    previousPINs[portNumber] = portValue;
  }
}

void setup() {
  // initialize LCD and set up the number of columns and rows: 
  lcd.begin(16, 2);

  lcd.setCursor(0, 0); 
  // Print a message to the lcd.
  lcd.print("I <3 Arduino :)"); 
  
  
  byte i, port, status;

  Firmata.setFirmwareVersion(0, 1);

  for (pin = 8; pin < TOTAL_PINS; pin++) {
    if IS_PIN_DIGITAL(pin) pinMode(PIN_TO_DIGITAL(pin), INPUT);
  }

  for (port = 0; port < TOTAL_PORTS; port++) {
    status = 0;
    for (i = 0; i < 8; i++) {
      if (IS_PIN_DIGITAL(port * 8 + i)) status |= (1 << i);
    }
    portStatus[port] = status;
  }

  Firmata.begin(57600);

}

void loop() {  
    lcd.setCursor(0, 1);
    lcd.write("Value is: ");
 // when characters arrive over the serial port...
  if (Serial.available()) {
    // wait a bit for the entire message to arrive
    delay(100);
    // clear the screen
 //   lcd.clear();
    // read all the available characters
    while (Serial.available() > 0) {
      // display each character to the LCD
      lcd.write(Serial.read());
    }
  }
  
  
  byte i;

  for (i = 8; i < TOTAL_PORTS; i++) {
    sendPort(i, readPort(i, 0xff));
  }
  /* make sure that the FTDI buffer doesn't go over 60 bytes, otherwise you
     get long, random delays.  So only read analogs every 20ms or so */
  currentMillis = millis();
  if (currentMillis - previousMillis > samplingInterval) {
    previousMillis += samplingInterval;
    while (Firmata.available()) {
      Firmata.processInput();
    }
    for (pin = 0; pin < TOTAL_ANALOG_PINS; pin++) {
      analogValue = analogRead(pin);
      if (analogValue != previousAnalogValues[pin]) {
        Firmata.sendAnalog(pin, analogValue);
        previousAnalogValues[pin] = analogValue;
      }
    }
  }
}