#define BLYNK_PRINT Serial // Comment this out to disable prints and save space
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <DHT.h>
char auth[] = "TB6KiXEXlQvFAVTDlSbrquq0x3qFo3Bp";
char ssid[] = "sneha123";
char pass[] = "asdfghjkl";
#define exhaust_Fan D3
#define DHTPIN D2 // Digital pin D2
#define MoistureSensor D1 // digitalpin D1
float moisture;
#define DHTTYPE DHT11 // DHT 11
int temp;
DHT dht(DHTPIN, DHTTYPE);
SimpleTimer timer;
#define motor D8
#define button D7
int buttonState;
#define CoSensor A0
int CoLevel;
WidgetTerminal terminal(V1);
BLYNK_WRITE(V1)
{
terminal.write(param.getBuffer(), param.getLength());
terminal.println();
// Ensure everything is sent
terminal.flush();
}
void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
float moisture = analogRead(MoistureSensor);
moisture = map(moisture,1023,0,0,100);
float CoLevel = analogRead(CoSensor);
float Covalue = map(CoLevel, 0, 1023, 0, 100);
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V4, moisture); //V4 is for moisture
Blynk.virtualWrite(V5, h); //V5 is for Humidity
Blynk.virtualWrite(V6, t); //V6 is for Temperature
Blynk.virtualWrite(V3, Covalue); //V7 is for pollution
}
void setup()
{
Serial.begin(9600); // See the connection status in Serial Monitor
Blynk.begin(auth, ssid, pass);
dht.begin();
pinMode(MoistureSensor ,INPUT);
pinMode(button, INPUT);
pinMode(motor, OUTPUT);
pinMode(CoSensor ,INPUT);
// Setup a function to be called every second
timer.setInterval(1000L, sendSensor);
terminal.flush();
pinMode(exhaust_Fan , OUTPUT);
}
void loop()
{
buttonState = digitalRead(button);
Serial.print("buttonState: ");
Serial.println(buttonState);
delay(50);
terminal.print("buttonState: ");
terminal.println(buttonState);
delay(50);
moisture = analogRead(MoistureSensor);
moisture = map(moisture,1023,0,0,100);
Serial.print("moisture: ");
Serial.print(moisture);
Serial.println("%");
terminal.print("moisture: ");
terminal.print(moisture);
terminal.println("%");
temp = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
Serial.print("temp: ");
Serial.print(temp);
Serial.println(" c");
terminal.print("temp: ");
terminal.print(temp);
terminal.println(" c");
delay(300);
CoLevel = analogRead(CoSensor);
int Covalue = map(CoLevel, 0, 1023, 0, 100);
Serial.print("Covalue: ");
Serial.print(Covalue);
Serial.println(" %");
terminal.print("Covalue: ");
terminal.print(Covalue);
terminal.println(" %");
delay(300);
if(buttonState == LOW){
selfmode();
}
terminal.flush();
Blynk.run(); // Initiates Blynk
timer.run(); // Initiates SimpleTimer
}
void selfmode(){
Serial.println("AutoMode");
delay(100);
terminal.println("AutoMode");
delay(200);
if (moisture == 0 ){
Serial.println("Dry land: motor is on for a while");
terminal.println("Dry land: motor is on for a while");
digitalWrite(motor, HIGH);
delay(5000);
digitalWrite(motor, LOW);
delay(300);
}
else if (temp >= 35){
Serial.println("High temperature: exhaust_Fan is on for a while");
terminal.println("High temperature:exhaust_Fan is on for a while");
digitalWrite(exhaust_Fan, HIGH);
delay(4000);
digitalWrite(exhaust_Fan, LOW);
delay(300);
}
else{
digitalWrite(motor, LOW);
digitalWrite(exhaust_Fan , LOW);
}
}
You must show the error which will identify the scope and variable.
iot:16:16: error: 'D2' was not declared in this scope; did you mean 'V2'?
16 | #define DHTPIN D2 // Digital pin D2
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:21:9: note: in expansion of macro 'DHTPIN'
21 | DHT dht(DHTPIN, DHTTYPE);
| ^~~~~~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino: In function 'void sendSensor()':
iot:17:24: error: 'D1' was not declared in this scope; did you mean 'y1'?
17 | #define MoistureSensor D1 // digitalpin D1
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:46:31: note: in expansion of macro 'MoistureSensor'
46 | float moisture = analogRead(MoistureSensor);
| ^~~~~~~~~~~~~~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino: In function 'void setup()':
iot:17:24: error: 'D1' was not declared in this scope; did you mean 'y1'?
17 | #define MoistureSensor D1 // digitalpin D1
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:69:11: note: in expansion of macro 'MoistureSensor'
69 | pinMode(MoistureSensor ,INPUT);
| ^~~~~~~~~~~~~~
iot:25:16: error: 'D7' was not declared in this scope; did you mean 'V7'?
25 | #define button D7
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:70:11: note: in expansion of macro 'button'
70 | pinMode(button, INPUT);
| ^~~~~~
iot:24:15: error: 'D8' was not declared in this scope; did you mean 's8'?
24 | #define motor D8
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:71:11: note: in expansion of macro 'motor'
71 | pinMode(motor, OUTPUT);
| ^~~~~
iot:15:21: error: 'D3' was not declared in this scope; did you mean 'V3'?
15 | #define exhaust_Fan D3
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:76:11: note: in expansion of macro 'exhaust_Fan'
76 | pinMode(exhaust_Fan , OUTPUT);
| ^~~~~~~~~~~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino: In function 'void loop()':
iot:25:16: error: 'D7' was not declared in this scope; did you mean 'V7'?
25 | #define button D7
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:82:29: note: in expansion of macro 'button'
82 | buttonState = digitalRead(button);
| ^~~~~~
iot:17:24: error: 'D1' was not declared in this scope; did you mean 'y1'?
17 | #define MoistureSensor D1 // digitalpin D1
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:90:25: note: in expansion of macro 'MoistureSensor'
90 | moisture = analogRead(MoistureSensor);
| ^~~~~~~~~~~~~~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino: In function 'void selfmode()':
iot:24:15: error: 'D8' was not declared in this scope; did you mean 's8'?
24 | #define motor D8
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:136:20: note: in expansion of macro 'motor'
136 | digitalWrite(motor, HIGH);
| ^~~~~
iot:15:21: error: 'D3' was not declared in this scope; did you mean 'V3'?
15 | #define exhaust_Fan D3
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:144:20: note: in expansion of macro 'exhaust_Fan'
144 | digitalWrite(exhaust_Fan, HIGH);
| ^~~~~~~~~~~
iot:24:15: error: 'D8' was not declared in this scope; did you mean 's8'?
24 | #define motor D8
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:150:20: note: in expansion of macro 'motor'
150 | digitalWrite(motor, LOW);
| ^~~~~
iot:15:21: error: 'D3' was not declared in this scope; did you mean 'V3'?
15 | #define exhaust_Fan D3
| ^~
C:\Users\DEFAULT.DESKTOP-41PDA0U\Downloads\water\iot\iot.ino:151:20: note: in expansion of macro 'exhaust_Fan'
151 | digitalWrite(exhaust_Fan , LOW);
| ^~~~~~~~~~~
exit status 1
'D2' was not declared in this scope; did you mean 'V2'?
take a moment and read this: How to get the best out of this forum - Using Arduino / Installation & Troubleshooting - Arduino Forum
It will help people help you. Your code and error codes need to be surrounded by code tags. It makes copy & paste much easier as well as avoiding odd formatting.
Done. Any idea why my code is getting so many errors?
which processor type did you select under Tools->board?
seems like the error are associated with pin definitons (e.g. D0)
THANK YOU!! FIXED IT
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