i am making a project of standalone ESP8266 with single channel relay with a synced physical button. the code works fine. i just want to run the code if there is no internet or wifi is off.
The code does not run without Internet.
here is my code
#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[] = "88decc9cb88340c9a5bead06423469d3";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Tesla";
char pass[] = "3015854308";
// Set your LED and physical button pins here
const int ledPin = 0;
const int btnPin = 2;
BlynkTimer timer;
void checkPhysicalButton();
int ledState = LOW;
int btnState = HIGH;
// Every time we connect to the cloud...
BLYNK_CONNECTED() {
// Request the latest state from the server
Blynk.syncVirtual(V2);
// Alternatively, you could override server state using:
//Blynk.virtualWrite(V2, ledState);
}
// When App button is pushed - switch the state
BLYNK_WRITE(V2) {
ledState = param.asInt();
digitalWrite(ledPin, ledState);
}
void checkPhysicalButton()
{
if (digitalRead(btnPin) == LOW) {
// btnState is used to avoid sequential toggles
if (btnState != LOW) {
// Toggle LED state
ledState = !ledState;
digitalWrite(ledPin, ledState);
// Update Button Widget
Blynk.virtualWrite(V2, ledState);
}
btnState = LOW;
} else {
btnState = HIGH;
}
}
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
// You can also specify server:
//Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
//Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
pinMode(ledPin, OUTPUT);
pinMode(btnPin, INPUT_PULLUP);
digitalWrite(ledPin, ledState);
// Setup a function to be called every 100 ms
timer.setInterval(100L, checkPhysicalButton);
}
void loop()
{
Blynk.run();
timer.run();
}
. This code works like a charm on stand alone esp8266 with single channel relay with sync button state and also physcial button connected to gpio 2 + GND (push button). Whether wifi is off or there is no internet it works and when internet comes back it reconnects to blynk server. i hope this code will help many many people. Thanks a bunch. here is picture of my prototype project, i am going to build more for my smart home.