Hi blynkers!
So i am trying to print the distance in cm using the HC-SR04 on the lcd screen in blynk. I am using the NewPing library, and Smoothing to provide a reliable output from the sensor. However i run into some problem. I don´t realy know how to print a reliable looping value onto the lcd screen. I guess i need to use virtual pins some how, but doesen´t really know how to do it. I have looked over the provided examples, but couldn´t find anything useful for this project.
I succesfully printed the second word “cm” but not the string where the distance data is. It only appear a random number which is not updating. Anyone having a suggestion on what to do? 
//distance measuring printed to blynk lcd screen
//blynk over usb definitions
#include <SoftwareSerial.h>
SoftwareSerial SwSerial(2, 3); // RX, TX
#define BLYNK_PRINT SwSerial
#include <BlynkSimpleSerial.h>
//newping library definitions
#include <NewPing.h>
#define TRIGGER_PIN 4 // trigger pin on the ultrasonic sensor.
#define ECHO_PIN 2 // echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance in centimeter.
char auth[] = "2f68e88a71234776b8ca52b4678238ec";
WidgetLCD lcd(V1);
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
//variables used in smothing the values from distance sensor
const int numReadings = 50; //number of readings
String distance; //make average to string later
int readings[numReadings]; // the readings from the analog input
int readIndex = 0; // the index of the current reading
int total = 0; // the running total
int average = 0; //the average value
void setup() {
SwSerial.begin(9600);
Blynk.begin(auth);
// initialize all the readings to 0:
for (int thisReading = 0; thisReading < numReadings; thisReading++) {
readings[thisReading] = 0;
}
while (Blynk.connect() == false) {
// Wait until connected
}
}
void code{ //smoothing values from distance sensor
// subtract the last reading:
total = total - readings[readIndex];
// read from the sensor:
readings[readIndex] = sonar.ping_cm();
// add the reading to the total:
total = total + readings[readIndex];
// advance to the next position in the array:
readIndex = readIndex + 1;
// if we're at the end of the array...
if (readIndex >= numReadings) {
// ...wrap around to the beginning:
readIndex = 0;
}
// calculate the average:
average = total / numReadings;
// send it to the computer as ASCII digits
distance = average; // convert to string
//print to lcd
lcd.clear(); //Use it to clear the LCD Widget
lcd.print(4, 0, distance); //print the average distance
lcd.print(4, 1, "cm");
delay(30);
}
void loop() {
Blynk.run();
code()
}