BLYNK_WRITE() sometimes doesn't work

Need Help With My Project
,
1

Hello.

I’m using an Arduino Uno R3 board with a ESP8266 shield. My Smartphone is a iPhone 7 with Blynk 2.26.1. I’m using Blynk Cloud Server.


//CONSTANTES E VARIÁVEIS
#define BLYNK_PRINT Serial
#define CURRENT_CAL 2 //REVER VALOR DE CALIBRAÇÃO COM MULTIMETRO - TENHO QUE CHEGAR EM 0.0716 COM LAMPADA LIGADA, 0 COM LAMPADA DESLIGADA
#define EspSerial Serial
#define ESP8266_BAUD 9600
const int pinoSensor = A2;
const int sensorPIR = 4;
int horaInicio;
int horaFinal;
int sensorLigado;
int botao;
const int rele = 8;
int contador; //variável de auxílio para o desligamento automatico da lampada


//BIBLIOTECAS
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>
#include <EmonLib.h>
#include <WidgetRTC.h>

//Settando configurações do Blynk para permitir a conexão do shield à rede WiFi abaixo
char auth[] = "xxxE";
char ssid[] = "Jucilaine";
char pass[] = "88218378";

ESP8266 wifi(&EspSerial); //Funcionamento do shield ESP8266
EnergyMonitor emon1; //Criação de instância para acompanhar o consumo de energia
WidgetRTC rtc; //Criação de instância para acompanhar o horário local

BLYNK_CONNECTED(){ //Função para atualizar os valores do servidor com os mostrados no app.
  Blynk.syncAll();
}

BLYNK_WRITE(V3) {
  sensorLigado = param.asInt();
}

BLYNK_WRITE(V4) {
  botao = param.asInt();
  Serial.println("Blynk_Write(V4) correu");
  Serial.println("Botão de ligar e desligar settado para: " + String(botao));
  if (botao == 0){
    digitalWrite(rele, HIGH);
  } else {
    digitalWrite(rele, LOW);
  }
}

BLYNK_WRITE(V5) {
  horaInicio = param.asInt();
}

BLYNK_WRITE(V6){
  horaFinal = param.asInt();
}

void sensorPresenca() {
  Serial.println();
  Serial.print("Sensor de presenca: ");
  Serial.println(digitalRead(sensorPIR));

  if (digitalRead(sensorPIR) == 0){ //5 leituras por segundo
    contador++;
  } else {
    contador = 0;
  }

  Serial.println();
  Serial.print("SensorLigado: ");
  Serial.println(sensorLigado);
  Serial.print("Contador: ");
  Serial.println(contador);

  int horaAtual = hour()*3600 + minute()*60;
  
  if ((horaAtual > horaInicio) && (horaAtual < horaFinal) && (sensorLigado == 1)) {
    if(contador > 10) {
      }
    }
  }

void enviarCorrente(){
  emon1.calcVI(20,100); //peguei (20,100) de um blog masterwalker
  double corrente = emon1.Irms;

  Serial.println();
  Serial.print("Corrente: ");
  Serial.print(corrente);
  Serial.println("A");
  Blynk.virtualWrite(V1, corrente);
}

void setup() {
  rtc.begin(); //sincronizando o horário
  
  pinMode(sensorPIR, INPUT);
  pinMode(rele, OUTPUT);

  Serial.begin(9600);
  EspSerial.begin(ESP8266_BAUD);
  delay(10);

  emon1.current(pinoSensor, CURRENT_CAL);
  Blynk.begin(auth, wifi, ssid, pass);
}

void loop() {
  enviarCorrente();
  sensorPresenca();
  Blynk.run();
}

So I’ve taken off some pieces of code that doesn’t relate to the V4 virtual pin, but my problem is: Sometimes the blynk_write(v4) function works properly, but sometimes I press the button on my mobile app and it doesn’t change the variable state. It’s connected to a relay module to control a lamp.

2

If you want us to take the time to look at your code then please post your full code.

Pete.

1 Like
3

Done. Thanks for the reply.

4

Can you please use timers for those functions? Check examples provided at Sketch Builder.
And… do NOT share your TOKEN if you want to keep your project “only” for you…:wink:

1 Like
5

Yep, I’m with @psoro on this. These two function calls in your void loop are probably starving the Blynk library of processor time, so it’s not processing the BLYNK_WRITEs

Have a read of this:
http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/keep-your-void-loop-clean

Also, I’m not a fan of using

It’s a bit of a sledgehammer to crack a nut (as we say in the UK - a bit of an overkill maybe a better phrase). Just sync the pins you need to sync, not everything.

Pete.

1 Like