Incorrect library file for the temperature sensor?

[Justinli]

When I used the display and temperature sensor for the weather station project, I called the "dht11" library while writing the code, and then I got this error, I used the DHT11 temperature sensor.

Arduino:1.8.13 (Windows 7), Development Boards："Arduino Uno"
C:\AppData\Local\Temp\ccRJNuOI.ltrans0.ltrans.o: In function `loop':

E:\weather1/weather1.ino:36: undefined reference to `dht::read(int)'

collect2.exe: error: ld returned 1 exit status

exit status 1

Error while compiling for development board Arduino Uno.

 

[FvM]

Can't be answered without seeing your code.

 

[Justinli]

int lightState = 0;
bool TemperatureBool = false;
bool HumidityBool = false;
bool illuminationBool = false;
bool illuminationState = false;

uint8_t TemperatureValueInteger = 0;
uint8_t TemperatureValueDecimal = 0;
uint8_t TemperatureValue = 0;

uint8_t HumidityValue = 0;
uint8_t illuminationValue = 0;

uint8_t TemperatureOutput[8] = {0xA5, 0x5A, 0x05, 0x82, 0x00, 0x10, 0x00, 0x00}; //A5 5A 06 83 00 0A 01 00 02
uint8_t HumidityOutput[8] = {0xA5, 0x5A, 0x05, 0x82, 0x00, 0x15, 0x00, 0x00}; //A5 5A 06 83 00 14 01 00 05
uint8_t illuminationOutput[8] = {0xA5, 0x5A, 0x05, 0x82, 0x00, 0x20, 0x00, 0x00}; //A5 5A 06 83 00 18 01 00 08
uint32_t cout_i;
uint8_t RecievedTemp[40];

#include "dht11.h"
dht11 DHT;
#define DHT11_PIN 5
#define PIN_A 3


void setup() {
 
  Serial.begin(115200);
 
}

void loop() {

DHT.read(DHT11_PIN);
 
 if(Serial.available() != 0)
  {
    for(cout_i = 0; cout_i < 9; cout_i ++)
    {
        RecievedTemp[cout_i] = Serial.read();
    }
    switch(RecievedTemp[5])
    {
    case 0x0A://Temperature start
        TemperatureBool = true;
        break;
    case 0x0C://Temperature stop
        TemperatureBool = false;
        TemperatureValue = DHT.temperature;
        TemperatureOutput[7] = TemperatureValue;
        Serial.write(TemperatureOutput, 8);
        break;
    case 0x0E://Temperature back
        TemperatureBool = false;
        break;
    case 0x14://Humidity start
      HumidityBool = true;
        break;
    case 0x16://Humidity stop
        HumidityBool = false;
        HumidityValue = DHT.humidity;
        HumidityOutput[7] = HumidityValue;
        Serial.write(HumidityOutput, 8);
        break;
    case 0x13://Humidity back
        HumidityBool = false;
        break;
    case 0x18://illumination start
      illuminationBool = true;
      illuminationState = false;
        break;
    case 0x19://illumination stop
      illuminationBool = false;
      illuminationValue = analogRead(PIN_A);
      illuminationOutput[7] = illuminationValue;
      Serial.write(illuminationOutput, 8);
        break;
    case 0x17://illumination back
      illuminationValue = 0;
      illuminationBool = false;
      break;
    default:
        break;
    }
}
}