Sensor Graph Using Arduino Nano

/*
  Sends sensor data to Android
  (needs SensorGraph and Amarino app installed and running on Android)
*/
 
#include <MeetAndroid.h>

MeetAndroid meetAndroid;
int sensor = A1;
int redLed = 11;

void setup()
{
  // use the baud rate your bluetooth module is configured to
    Serial.begin(9600);

 pinMode(sensor, INPUT);
 meetAndroid.registerFunction(red, 'o');
 pinMode(redLed, OUTPUT);
 analogWrite(redLed, 20); 
 
}
 
void loop()
{
  meetAndroid.receive(); // you need to keep this in your loop() to receive events
 
  meetAndroid.send(analogRead(sensor));
 
  // add a little delay otherwise the phone is pretty busy
  delay(100);
}
void red(byte flag, byte numOfValues)
{
  analogWrite(redLed, meetAndroid.getInt());
}