GeeksTips.com
Published

Blynk Bridge Example with ESP8266

Getting started with Blynk Bridge - the simplest method to communicate between ESP8266, Arduino or Raspberry Pi.

IntermediateShowcase (no instructions)1 hour5,499
Blynk Bridge Example with ESP8266

Things used in this project

Hardware components

ESP8266 ESP-01
Espressif ESP8266 ESP-01
×1
Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
Raspberry Pi 2 Model B
Raspberry Pi 2 Model B
×1

Software apps and online services

Blynk
Blynk

Story

Read more

Code

Blynk Bridge - Communication between ESP8266

Arduino
/**************************************************************
   Blynk Bridge - Communication between ESP8266
   Sketch code for the receiver module (module which is controlled)
   www.geekstips.com
 **************************************************************/
 
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
 
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx";
 
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "XXXXXXXX";
char pass[] = "********";
 
// This code will update the virtual port 5
BLYNK_WRITE(V5) {
  int pinData = param.asInt();
}
 
void setup(){
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
}
 
void loop(){
  Blynk.run();
}

Blynk Bridge - Communication between ESP8266

Arduino
/**************************************************************
   Blynk Bridge - Communication between ESP8266
   Sketch code for the master module (module which will command others)
   www.geekstips.com
 **************************************************************/
#define BLYNK_PRINT Serial
 
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <DHT.h>
 
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx";
 
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "XXXXXXXXXXXXX";
char pass[] = "*************";
 
#define DHTPIN 2 // What digital pin we're connected to
 
//#define DHTTYPE DHT11   // DHT 11
  #define DHTTYPE DHT22   // DHT 22, AM2302, AM2321
//#define DHTTYPE DHT21   // DHT 21, AM2301
 
DHT dht(DHTPIN, DHTTYPE);
SimpleTimer timer;
WidgetBridge bridge1(V1);
 
BLYNK_CONNECTED() {
  // Place the AuthToken of the second hardware here
  bridge1.setAuthToken("tttttttttttttttttttttttttttttttt"); 
}
 
void sendSensor(){
  // get readings from the DHT22 sensor
  float h = dht.readHumidity();
  float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
  
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
 
  // Send command to the second ESP
  // WHEN Temperature IS OVER 28 C
  // in order to open the 220V Relay
  // Also update the VIRTUAL port 5 
  // on the second ESP
  if(t > 28){
     bridge1.digitalWrite(2, 1000);
     bridge1.virtualWrite(V5, 1000); 
  }else{
     bridge1.digitalWrite(2, 0);
     bridge1.virtualWrite(V5, 0); 
  }
 
  // Send temperature and humidity to Blynk App
  // on VIRTUAL ports 5 and 6 in order to 
  // display on Gauge Widget
  Blynk.virtualWrite(V5, h);
  Blynk.virtualWrite(V6, t);
}
 
void setup(){
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  dht.begin();
 
  timer.setInterval(1000L, sendSensor);
}
 
void loop(){
  Blynk.run();
  timer.run();
}

Blynk Bridge - Communication between ESP8266

Arduino
WidgetBridge bridge1(V1);
 
BLYNK_CONNECTED() {
  // Place the AuthToken of the second hardware here
  bridge1.setAuthToken("***********************"); 
}

Blynk Bridge - communication between ESP8266

Arduino
if(t > 28){
     bridge1.digitalWrite(2, 1000);
     bridge1.virtualWrite(V5, 1000); 
}else{
     bridge1.digitalWrite(2, 0);
     bridge1.virtualWrite(V5, 0); 
}

Github file

https://github.com/blynkkk/blynk-library/blob/master/examples/Widgets/Bridge/Bridge.ino

Credits

GeeksTips.com

GeeksTips.com

1 project • 11 followers
Technology tutorials, reviews and discussions

Comments

Add projectSign up / Login