Hi All,
I am trying to create a smart home Smoke/Fire Detector using Blynk.
I have used a ESP8266, a MQ-2 and Flame Sensor. I sort of added all the code in one place but I think I am missing something very important. Can you please help?
I am mainly having difficulty in compiling the MQ-2 Sensor Code, as it says 'digital' was not declared in this scope. Also I want to add a Buzzer option, and can’t find it’s code.
Here is the Code:
//Blynk Fire Alarm Notification with Flame Sensor
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
BlynkTimer timer;
char auth[] = "XXXX"; //Auth code sent via Email
char ssid[] = "XXXX"; //Wifi name
char pass[] = "XXXX"; //Wifi Password
int flag=0;
//Flame Sensor Code
void notifyOnFire()
{
int isButtonPressed = digitalRead(D1);
if (isButtonPressed==1 && flag==0) {
Serial.println("Fire in the House");
Blynk.notify("Alert : Fire in the House");
flag=1;
}
else if (isButtonPressed==0)
{
flag=0;
}
}
void setup()
{
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
pinMode(D1,INPUT_PULLUP);
timer.setInterval(1000L,notifyOnFire);
}
//Gas Sensor MQ-2 Action.
int gas_value;
int gas_avalue;
void setup()
{
pinMode(16, INPUT);
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
}
void loop()
{
gas_avalue = digitalRead(D2);
if (gas_avalue < 1)
{
Serial.println("DANGER!!!!");
digital.Write(D3,HIGH);
}
else
{
Serial.println("NO LEAKAGE");
digital.Write(D3,LOW);
}
delay(100);
void loop()
{
Blynk.run();
timer.run();
}
Thanks Pete, I’m gonna try that and let you know if this works.
About the Buzzer, i don’t plan to use anything fancy, just any plain Buzzer. Including a relay(connected to a big buzzer) might also work.
Sorry Pete, it didn’t work or I don’t know what I am missing here. I changed the to ‘‘digitalWrite(D3,HIGH);’’, but still getting errors, really can’t figure out pls help.
Here is the Error now.
C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries M:\Arduino\libraries -fqbn=esp8266:esp8266:nodemcuv2:CpuFrequency=80,VTable=flash,FlashSize=4M1M,LwIPVariant=v2mss536,Debug=Disabled,DebugLevel=None____,FlashErase=none,UploadSpeed=9600 -ide-version=10805 -build-path C:\Users\SYEDUL~1\AppData\Local\Temp\arduino_build_405914 -warnings=none -build-cache C:\Users\SYEDUL~1\AppData\Local\Temp\arduino_cache_659596 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.esptool.path=C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages\esp8266\tools\esptool\0.4.13 -prefs=runtime.tools.xtensa-lx106-elf-gcc.path=C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages\esp8266\tools\xtensa-lx106-elf-gcc\1.20.0-26-gb404fb9-2 -prefs=runtime.tools.mkspiffs.path=C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages\esp8266\tools\mkspiffs\0.2.0 -verbose M:\Arduino\FIRE ALARM\Test\Test.ino
M:\Arduino\FIRE ALARM\Test\Test.ino: In function 'void setup()':
Test:36: error: redefinition of 'void setup()'
void setup()
^
Test:25: error: 'void setup()' previously defined here
void setup()
^
M:\Arduino\FIRE ALARM\Test\Test.ino: In function 'void loop()':
Test:49: error: 'digital' was not declared in this scope
digital.Write(D3,HIGH);
^
Test:55: error: 'digital' was not declared in this scope
digital.Write(D3,LOW);
^
Test:60: error: a function-definition is not allowed here before '{' token
{
^
Test:63: error: expected '}' at end of input
}
^
Using library ESP8266WiFi at version 1.0 in folder: C:\Users\Syedul Bashar\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\libraries\ESP8266WiFi
Using library Blynk at version 0.6.1 in folder: M:\Arduino\libraries\Blynk
exit status 1
redefinition of 'void setup()'
This is a Blynk forum, not basic C++ teaching forum.
You need to combine the code to into one void setup.
In addition, you can only have one void loop, so you need to do the same with that. But, doing digital reads thousands of times per second in the void loop isn’t conducive to good Blynking.
Read this for information about doing this with a timer:
Don’t rely on Blynk or ANY IoT system for your mission critical control.
If your device setup controls a local detection, alarm and extinguishing system, then it needs to fully and timely function, regardless if there is an Internet connection and/or Blynk Server connection. This can easily be done in your code… here is one example of a way to keep your system running without a Blynk server link.
Other than that, Blynk is a perfectly good system to use for passing on the monitoring status and alerts to a remote local.
Guys I have done some research and learning, afterwards I have came up with the following code given below.
But it’s not correct and has a error. The Error is for using Void twice and I can’t think of a way to get around it. I have searched and looked up everywhere including Blynk and Arduino forums…
Pls help and suggest me…
//Blynk Fire Alarm Notification
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
BlynkTimer timer;
//Auth Code, Wi-Fi and others.
char auth[] = "XXXX"; //Auth code sent via Email
char ssid[] = "XXXX"; //Wifi name
char pass[] = "XXXX"; //Wifi Password
int flag=0;
int gas_value;
int gas_avalue;
//Flame Sensor Code.
void notifyOnFire();
{
int isButtonPressed = digitalRead(D1);
if (isButtonPressed==1 && flag==0) {
Serial.println("Fire in the House");
Blynk.notify("Alert : Fire in the House");
flag=1;
}
else if (isButtonPressed==0)
{
flag=0;
}
void notifyOnSmoke() //SMOKE Sensor Code
{
int isButtonPressed = digitalRead(D2);
if (isButtonPressed==1 && flag==0)
{
Serial.println("Alert!!! SMOKE is Detected.");
Blynk.notify("Alert!!! SMOKE is Detected.");
flag=1;
}
else if (isButtonPressed==0)
{
flag=0;
}
}
}
void setup()
{
Serial.begin(115200);
Blynk.begin(auth, ssid, pass);
pinMode(D1,INPUT_PULLUP);
pinMode (D2,INPUT_PULLUP);
timer.setInterval(1000L,notifyOnFire);
timer.setInrerval(1000L,notifyOnSmoke);
}
void loop()
{
Blynk.run();
timer.run();
}
@PeteKnight PETE,
Straight up HUG
U R the SUPER HERO !!!
Simply thanking you is not enough, but yet, I thank you from the bottom of my heart Brother…
Next stop adding @Gunner
