Hello All,
I am aware that breaking out of a loop condition is much talked about in the forums. I did extensive search in the forum but could not come to a clear conclusion after testing.
I want to achieve below actions from my NodeMCU (ESP8266) which has a Relay connected to it
-
When I press V0 from Blynk App the relay fires up- This is working as expected
-
When I press V1 from Blynk App, the relay should Pulse or Switch On for 2 seconds and OFF for 2 seconds continually till V1 comes back to 0. --> This goes into loop once V1 is activated and does not read value of V1 if it changes. I assume that due to loop this issue happens and Blynk goes offline.
I have tried lot of codes - mix and match but frustrated that it’s not working 
Please do help me…I’m a beginner in the world of IOT and coding…
My code is below:
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
/*** Here are the things that you have to change ***/
/***************************************************/
/* Blynk AUTH key */
char const AUTH[] = "XXXXX";
/* Wi-Fi Details */
char const SSID[] = "XXXX";
char const PASS[] = "XXXX";
char const HOSTNAME[] = "HOSTNAME";
char const OTAPSW[] = "OTA PASSWORD";
/* Blynk Virtual Pins */
#define RELAYVPIN1 V0
#define RELAYVPIN2 V1
/* Device Pins */
#define RELAY 14
#define LED 13
#define BUTTON 0
/**************************************************/
/* General variables and declarations */
BlynkTimer timer;
volatile bool state;
volatile bool state2;
void setup()
{
pinMode(LED,OUTPUT);
pinMode(RELAY,OUTPUT);
// pinMode(BUTTON,INPUT);
WiFi.hostname(HOSTNAME);
Blynk.begin(AUTH, SSID, PASS);
ArduinoOTA.setPassword(OTAPSW);
ArduinoOTA.setHostname(HOSTNAME);
ArduinoOTA.begin();
digitalWrite(LED, LOW);
delay(700);
digitalWrite(LED, HIGH);
delay(700);
digitalWrite(LED, LOW);
delay(700);
digitalWrite(LED, HIGH);
}
BLYNK_CONNECTED() {
Blynk.syncAll();
Blynk.syncVirtual(V1);
}
void loop() {
if (Blynk.connected()) { Blynk.run(); }
else { Blynk.connect(); }
timer.run();
ArduinoOTA.handle();
}
/***************************************************
* Read virtual pin 0 and turn on/off relay
**************************************************/
BLYNK_WRITE(RELAYVPIN1){
state = param.asInt();
digitalWrite(RELAY, state);
}
BLYNK_WRITE(RELAYVPIN2)
{
state2 = param.asInt();
if (state2 == 1)
{
do
{
digitalWrite(RELAY, 1);
delay(2000);
digitalWrite(RELAY, 0);
delay(2000);
} while (state2 == 1);
}
}