Error: expected primary-expression before '.'

Projects Programming
1

i need some help with my code. The error show
sketch.ino: In function 'void loop()':
sketch.ino:32:16: error: expected primary-expression before '.' token
int chk = DHT.read11(DHT11PIN);
^
sketch.ino:33:18: error: expected primary-expression before ',' token
lcd.setCursor( , 0);
^
sketch.ino:35:16: error: expected primary-expression before '.' token
lcd.print(DHT.temperature);
^
sketch.ino:40:16: error: expected primary-expression before '.' token
lcd.print(DHT.humidity);
^

Error during build: exit status 1

This is my full code

#include <DHT.h>
#include <DHT_U.h>
#define DHT11PIN 4

int dht11 = DHT11;
#include <LiquidCrystal.h>
LiquidCrystal lcd (12, 13, 4, 5, 6, 7);

void setup() {
// masukkan code setup di sini, VoidSetup berjalan sekali sahaja
pinMode (2, INPUT_PULLUP);
pinMode (3, INPUT_PULLUP);
lcd.setCursor (0, 0);
lcd.print ("COUNTER MACHINE ");

Serial.begin(9600);//serial monitor

pinMode(4, OUTPUT); //pin ENA, untuk PWM
pinMode(5, OUTPUT); //pin IN1, digital
pinMode(6, OUTPUT); //pin IN2, digital

//offkan semua pin pada peringkat awal
//dengan meletakkan LOW
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, LOW);

}//END VOID SETUP

void loop(){
int chk = DHT.read11(DHT11PIN);
lcd.setCursor( , 0);
lcd.print("Temp: ");
lcd.print(DHT.temperature);
lcd.print((char)223);
lcd.print("C");
lcd.setCursor(0,1);
lcd.print("Humidity: ");
lcd.print(DHT.humidity);
lcd.print("%");
delay(2000); //Delay 2 sec between temperature/humidity check.
//Forward-kan Motor selamat 3 saat
forward();
delay(3000);

//Brake-kan Motor selamat 1 saat
brake();
delay(1000);

//Reverse-kan Motor selamat 5 saat
brake();
delay(5000);

//Brake-kan Motor selamat 1 saat
brake();
delay(1000);

}//END VOID LOOP

void forward() {
digitalWrite(4, LOW); //IN2
digitalWrite(5, HIGH); //IN1
analogWrite(6, 255); //ENA - PWM (255 Speed Max, 0 Speed Min)
}//END FORWARD

void reverse() {
digitalWrite(4, HIGH); //IN2
digitalWrite(5, LOW); //IN1
analogWrite(6, 255); //ENA - PWM (255 Speed Max, 0 Speed Min)
}//END REVERSE

void brake() {
digitalWrite(4, HIGH); //IN2
digitalWrite(5, HIGH); //IN1
digitalWrite(6, HIGH); //ENA - PWM (255 Speed Max, 0 Speed Min)
}//END BRAKE

2

In the Arduino IDE, use Ctrl T or CMD T to format your code then copy the complete sketch.

Use the </> icon from the ‘reply menu’ to attach the copied sketch.

lcd.setCursor( , 0); :thinking:

1 Like
3

Oops

4

Hi,
correct your topic by enclosing your code in </> tags.

Your code has several errors that it is even difficult to help you.

I will list a few:

1 (already quoted by @LarryD ) , lcd.setCursor( , 0);

  1. Dual pin definition:

    #define DHT11PIN 4
    LiquidCrystal LCD (12, 13, 4, 5, 6, 7);
    pinMode(4, OUTPUT); //pin ENA, untuk PWM
    pinMode(5, OUTPUT); //pin IN1, digital
    pinMode(6, OUTPUT); //pin IN2, digital

  2. LCD initialization is missing. (lcd.begin(xx,y);

  3. This line doesn't define the instance correctly:
    int dht11 = DHT11;
    Correct for this library:
    DHT_Unified dht(DHTPIN, DHTTYPE);

  4. I stopped here, there must be more errors.

I suggest researching more examples of using this sensor on the web.
There must be several tutorials.

5

alright thank

6

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