Hello everyone, I need your help. I am trying to get value of distance from ultrasonic sensor. I already connect the trigger wire to D1 and echo wire to D2, I already connect VCC to VCC and GND to GND. But I don’t get value in the gauge meter. I already set the gauge to get value from V0. Are there any problems in my code?
#define BLYNK_TEMPLATE_ID "TMPLKPzCKuIS"
#define BLYNK_DEVICE_NAME "Tes Ultrasonic"
#define BLYNK_AUTH_TOKEN "AUK6smdfnZyNFgPrWSXKPWUNrCShXY2j"
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#define trig 1
#define echo 2
long duration;
int distance;
// You should get Auth Token in the Blynk App.
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Galaxy A138950"; // your ssid
char pass[] = "tunggusebentar"; // your pass
BlynkTimer timer;
void setup()
{
// Debug console
pinMode(trig, OUTPUT); // Sets the trigPin as an Output
pinMode(echo, INPUT); // Sets the echoPin as an Inpu
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
// Setup a function to be called every second
timer.setInterval(1000L, sendSensor);
}
void loop()
{
Blynk.run();
timer.run();
}
void sendSensor()
{
digitalWrite(trig, LOW); // Makes trigPin low
delayMicroseconds(2); // 2 micro second delay
digitalWrite(trig, HIGH); // tigPin high
delayMicroseconds(10); // trigPin high for 10 micro seconds
digitalWrite(trig, LOW); // trigPin low
duration = pulseIn(echo, HIGH); //Read echo pin, time in microseconds
distance = duration * 0.034 / 2; //Calculating actual/real distance
Serial.print("Distance = "); //Output distance on arduino serial monitor
Serial.println(distance);
Blynk.virtualWrite(V0, distance);
delay(1000); //Pause for 3 seconds and start measuring distance again
}
