ZJ0518
Newbie
Hey, I faced this issue where when I only connect one ultrasonic sensor to the NodeMCU and Blynk App, the Blynk app did notify me when someone is passing by the sensor. When I added on another ultrasonic sensor to the NodeMCU, the blynk app didn't notify me when I interrupted both sensors.
Attached below is my code to interface the ultrasonic sensors with the NodeMCU and blynk app. Please help me out guys... Thank you!
Code:
Attached below is my code to interface the ultrasonic sensors with the NodeMCU and blynk app. Please help me out guys... Thank you!
Code:
Code:
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#define echoPin1 D1
#define trigPin1 D2
#define echoPin2 D3
#define trigPin2 D4
char auth[] = "***";
char ssid[] = "***";
char pass[] = "***";
long duration1;
float distance1;
long duration2;
float distance2;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Blynk.begin(auth,ssid,pass);
pinMode(trigPin1,OUTPUT);
pinMode(echoPin1,INPUT);
pinMode(trigPin2,OUTPUT);
pinMode(echoPin2,INPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(trigPin1,LOW);
delayMicroseconds(2);
digitalWrite(trigPin1,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin1,LOW);
duration1 = pulseIn(echoPin1,HIGH);
distance1 = duration1 *0.34/2;
digitalWrite(trigPin2,LOW);
delayMicroseconds(2);
digitalWrite(trigPin2,HIGH);
delayMicroseconds(10);
digitalWrite(trigPin2,LOW);
duration2 = pulseIn(echoPin2,HIGH);
distance2 = duration2 *0.34/2;
if (distance1 <= 1000){
Blynk.virtualWrite(V1,255);
Blynk.notify("Intruder passing by sensor1 !");
}
else{
Blynk.virtualWrite(V1,0);
}
if (distance2 <= 1000){
Blynk.virtualWrite(V2,255);
Blynk.notify("Intruder passing by sensor2 !");
}
else{
Blynk.virtualWrite(V2,0);
}
Blynk.run();
}