Problem while adding Sensor

i am succesfully connected arduino Uno using serial communication.
now i want to add motion sensor with ardiuno.
but when i select add new sensor and upload sketch my connection gone offline so plz guide me.

can you share the code.

#define CAYENNE_PRINT Serial  // Comment this out to disable prints and save space

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";

#define SENSOR_PIN 4 // Do not use digital pins 0 or 1 since those conflict with the use of Serial.

void setup()
  Cayenne.begin(username, password, clientID);

void loop()

int previousState = -1;
int currentState = -1;
unsigned long previousMillis = 0;

void checkSensor()
  unsigned long currentMillis = millis();
  // Check sensor data every 250 milliseconds
  if (currentMillis - previousMillis >= 250) {
    // Check the sensor state and send data when it changes.
    currentState = digitalRead(SENSOR_PIN);
    if (currentState != previousState) {
      Cayenne.virtualWrite(VIRTUAL_CHANNEL 1, currentState);
      previousState = currentState;
        previousMillis = currentMillis;

what kind of connection are you using.

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Serial usb connection

you have to modify the same code you used to connect.

ok i will try it.

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