Simple CODE problem please help me guys :(

[alialsaffar]

i made a simple temperature sensor device using an lcd and dht11 and offcourse  arduino uno

please tell me why when i press the button and when it's HIGH it show the error message please help me

Code: [Select]

#include <LiquidCrystal.h>

#include <SimpleDHT.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
// for DHT11,
//      VCC: 5V or 3V
//      GND: GND
//      DATA: 2
int pinDHT11 = 8;
SimpleDHT11 dht11;
int buttonState = 0;
int buttonPin = 7;
void setup() {
  Serial.begin(115200);
  pinMode(buttonPin, INPUT);
  lcd.begin(16, 2); lcd.home(); lcd.print("Loading...");
  delay(2000); lcd.clear();
 
}

void loop() {
  // start working...
  // this is fir keyboard typing
if (Serial.available()) {
    // wait a bit for the entire message to arrive
    delay(100);
    // clear the screen
    lcd.clear();
    // read all the available characters
    while (Serial.available() > 0) {
      // display each character to the LCD
      lcd.write(Serial.read()); delay(100);
    } delay(3000);}
    // keyboard typing finished
    ////////////////////////
    else {
  Serial.println("=================================");
  Serial.println("Sample DHT11...");

  // read without samples.
  byte temperature = 0;
  byte humidity = 0;
  if (dht11.read(pinDHT11, &temperature, &humidity, NULL)) {
    lcd.begin(16, 2);  lcd.print("Error, Check it Plz");//put autoscroll
    Serial.print("Read DHT11 failed.");
    delay(1000); lcd.clear(); return;
  }

  Serial.print("Sample OK:  " );
  Serial.print((int)temperature); Serial.print(" *C, ");
  Serial.print((int)humidity); Serial.println(" %");
  // read button state
buttonState = digitalRead(buttonPin);
// condition

if (buttonState == HIGH) {
  lcd.clear();
  lcd.setCursor(0, 0);
   lcd.print("Temperature = "); lcd.print(temperature );
} else {
 
   lcd.setCursor(0, 0);
  lcd.print("Humidity = "); lcd.print(humidity );

 
   lcd.setCursor(0, 1);
  lcd.print("Created By Ali");
  delay(1000);  }
 
  } }

[ieee488]

please tell me why when i press the button and when it's HIGH it show the error message please help me

What error message?

[alialsaffar]

If look through the code there is an error message that pops if there isn't humidity & temperature reading it also pops when i press the button,

[aarg]

Have you tried the DHT11 with the example sketch that comes with the DHT library?

[alialsaffar]

The code works fine without the if conditions but when i add the if condition it mess up

[UKHeliBob]

Code: [Select]

dht11.read(pinDHT11, &temperature, &humidity, NULL)Does this return true if a successful reading was taken ?

[nickgammon]

Code: [Select]

lcd.begin(16, 2);  lcd.print("Error, Check it Plz");//put autoscroll
    Serial.print("Read DHT11 failed.");
    delay(1000); lcd.clear(); return;

Can you please put one statement per line? This is incredibly hard to read.

[aarg]

The code works fine without the if conditions but when i add the if condition it mess up

Which if condition? There are several.