BLYNK
HOME       📲 GETTING STARTED       📗 DOCS       ❓HELP CENTER       👉 SKETCH BUILDER

Light was Off Before Timer Reached the End - Relay+PIR/Radar+RF+Magnetic Door Sensor

#1

Hi Everyone,

Blynk is a wonderful thing, I really like the concept and its interface, however I am still learning Blynk and coding skill. I try searching the similar issue thread through Blynk Forum and Google, maybe my English problem, I did not find the solution yet, I really don’t know is it the sketch or hardware issue, I am struggling with the weird behavior for a week, please kindly help to identify the issue.

History:
I used to build Relay with PIR/RF/Magnetic Door Sensor individually and all of them are working without any issue so far, now I combine all the hardware & sketches into one Blynk Project. I want the light to turn on either by PIR sensing or open the door or press RF button or press Blynk Button.

Problem Statement:
In the begining, let’s say in the first 5 minutes, everything is OK, after that, the relay happened the following situation,

  1. Turn off light too early before timer reached (Ex: Sketch shows PIR sensed HIGH and then triggered Relay to turned on light for 10 seconds, but it turned off light at 5~10 second, same issue for RF & Door Sensor).

Action:

  1. I made 2 hardware sets with same sketch in order to clarify the issue, basically the hardware for these 2 sets are exactly the same, except the PIR/Radar, 1st assembly is NodeMcu+PIR+RF+Relay+Magnetic door Sensor, the 2nd one is WeMos D1 mini Radar+RF+Relay+Magnetic Door Sensor, they all encountered the same issue, after that, I used another 3 different 5V relays and two 5V power adapter to do troubleshooting, but still no joy. :smirk:

  2. I added one 2N2222 Transistor & 4.7K resistor on Relay Out Pin, did not see any improvement.

Hardware:

  1. NodeMcu Amica (2.4.1) or WeMos D1 mini
  2. PIR hc-sr501 or RCWL-0516 Radar
  3. Magnetic Door Sensor
  4. RF 433 Receiver
  5. 5V Relay
  6. Two 5V 2.4A power supply, one is for WeMos D1 mini board, another one is for supplying PIR+RF+Relay+Magnetic Door Sensor.

Blynk Local Server Version: V0.38.3
Blynk Library: 0.5.3
Blynk App Version: V2.26.7
NodeMcu ESP8266 Core Version: 2.4.1

Blynk Widget:

  1. Button
  2. LED

Wire Connection:
D1: RF 433 Receiver
D2: PIR or RCWL-0516 Radar
D5: 5V Relay
D7: Magnetic Door Sensor

Sketch:

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <TimeLib.h>
#include <SPI.h>
#include <ArduinoOTA.h>
#include <RCSwitch.h>
#define RF_RECEIVER D1

char auth[] = ""; //Local Server
char ssid[] = "";
char pass[] = ""

int relay = D2;
int radar = D5;
int door = D7;

int counter = 0;
int isDoorOpened = 0;
int VButton = 0;

int flagRadar = 0;
int flagRF = 0;
int flagDoor = 0;
int flagVButton = 0;

int staterelay = LOW;
int val;
int previous = LOW;
long xtime = 0;
long debounce = 500;
int stayON = 10000; //stay on for 10000 ms

long lastActivated = 0; //last time display was activated
long myDelay = 15000; //15 seconds in millis

RCSwitch mySwitch = RCSwitch();
WidgetLED led(10);

SimpleTimer timer;

BLYNK_CONNECTED() {
  Blynk.syncAll();
}

void reconnectBlynk() {
  if (!Blynk.connected()) {
    if (Blynk.connect()) {
      BLYNK_LOG("Reconnected");
    } else {
      BLYNK_LOG("Not reconnected");
    }
  }
}

void setup() {
  pinMode(radar, INPUT);
  pinMode(relay, OUTPUT);
  pinMode(door, INPUT_PULLUP);
  digitalWrite(relay, LOW);
  digitalWrite(radar, LOW);

  Serial.begin(115200);
  WiFi.mode(WIFI_STA);

  Blynk.begin(auth, ssid, pass, "123.456.com", 8080); //Blynk Local Server

  while (Blynk.connect() == false) {}

  ArduinoOTA.setHostname("");
  ArduinoOTA.setPassword((const char *)"");
  ArduinoOTA.begin();

  int mytimeout = millis() / 1000;
  while (Blynk.connect() == false) { // try to connect to server for 10 seconds
    if ((millis() / 1000) > mytimeout + 8) { // try local server if not connected within 9 seconds
      break;
    }
  }

  mySwitch.enableReceive(RF_RECEIVER);  //RF 433 Receiver
  timer.setInterval(1000L, CheckSensor);  //PIR or Radar Sensor
  timer.setInterval(150L, RFSwitch);  //RF433 Wall Mount Switch
  timer.setInterval(1000L, CheckDoorStatus);  //Magnetic Door Sensor - 3.4M Cable
}

//Radar/PIR Sensor Status Check
void CheckSensor() {
  val = digitalRead(radar);

  Serial.print("Radar Status: ");
  Serial.print(val, DEC);
  Serial.println(" ");
  Serial.println(" ");

  if (flagRF == 0 && flagDoor == 0  && flagVButton == 0) {
    if (val == 1  && previous == LOW && millis() - xtime > debounce) {

      if (staterelay == HIGH) {
        digitalWrite(relay, LOW);
      }
      //verifies it's been 15 seconds
      else if (millis() - lastActivated > myDelay) {

        digitalWrite(relay, HIGH); //Turn On Relay
        Blynk.virtualWrite(V11, HIGH);
        led.on();
        flagRadar = 1;

        timer.setTimeout(10000L, []() {  // LED Light is On for 10 sec
          digitalWrite(relay, LOW);
          Blynk.virtualWrite(V11, LOW);
          led.off();
        });
        flagRadar = 0;

        lastActivated = millis(); //resets lastActivated
      }
      xtime = millis();
    }
    previous == val;
  }
}

//RF433 Switch Turn On Light Manually for Long Period
void RFSwitch() {
  if (mySwitch.available()) {
    if (mySwitch.getReceivedValue() == 1234567 || mySwitch.getReceivedValue() == 7654321 && flagRF == 0 && flagRadar == 0 && flagVButton == 0) {

      digitalWrite(relay, HIGH); //Turn On Relay
      Blynk.virtualWrite(V11, HIGH);
      led.on();
      flagRF = 1;

      timer.setTimeout(300000L, []() {  // Run every 5 minutes
        digitalWrite(relay, LOW);
        Blynk.virtualWrite(V11, LOW);
        led.off();
        flagRF = 0;
      });
    }
    mySwitch.resetAvailable();
    if (mySwitch.getReceivedValue() == 1234567 || mySwitch.getReceivedValue() == 7654321 && flagRF == 1 && flagRadar == 0 && flagVButton == 0) {
      digitalWrite(relay, LOW);
      Blynk.virtualWrite(V11, LOW);
      led.off();
      flagRF = 0;
    }
  }
}

void CheckDoorStatus() {
  int isDoorOpened = digitalRead(door);
  Serial.print("Door Status: ");
  Serial.print(isDoorOpened);
  Serial.println(" ");
  Serial.println(" ");

  if (isDoorOpened == 1 && flagDoor == 0 && flagRadar == 0 && flagRF == 0 && flagVButton == 0)
  {
    digitalWrite(relay, HIGH); //Turn On Relay
    Blynk.virtualWrite(V11, HIGH);
    led.on();
    flagDoor = 1;

    timer.setTimeout(120000L, []() {  // Run every 2 minutes
      digitalWrite(relay, LOW);
      Blynk.virtualWrite(V11, LOW);
      led.off();
    });
  }
  if (isDoorOpened == 0 && flagDoor == 1)
  {
    led.off();
    flagDoor = 0;
  }
}

//Virtual Button to Turn On/Off Light Manually
BLYNK_WRITE(V11)
{
  int VButton = param.asInt(); // Get value as integer

  if (VButton == 1)
  {
    digitalWrite(relay, HIGH);
    led.on();
    flagVButton = 1;
  }

  else
  {
    digitalWrite(relay, LOW);
    led.off();
    flagVButton = 0;
  }
}

void loop() {
  ArduinoOTA.handle();
  Blynk.run();
  timer.run();
}
0 Likes

#2

I don’t know if this is contributing to your issue or not, but you are trying to run two functions at the same time every second… best to stagger timers so they do not coincide at all, or at least very infrequently.

And I don’t know if this is just a typo in your comments, and honestly I am not about to read through your entire code to troubleshoot… but timeout timers only run ONCE at the end of the timout… if you want them to run constantly under a set condition then you need to apply timer IDs and use timer.setInterval() with timer enable() disable() commands to control the overall activity of the timer.

https://playground.arduino.cc/Code/SimpleTimer#Functions

1 Like

I want to turn on the lights with time input widget
#3

Thank you very much for showing me the materials, please allow me to study that for couple of days. :grinning:

0 Likes

split this topic #4

A post was split to a new topic: I want to turn on the lights with time input widget

0 Likes

closed #5
0 Likes