General library including problem

I’ve a problem with dht11 library but seem a general library including problem.

If I use the code below in a library I always get a timeout error. Seems like i can’t access to the pin read and write. Where is the problem?

I have the dht11.h/cpp files in the same directory of TestClass.h/cpp

MAIN

#include <TestClass.h>
test TestClass; //class instancing 

void setup(){

}

void loop{
   test.measureRead();

   delay(3000);
}

Library code

#include <Arduino.h>
#include <dht11.h>

//the class method

void TestClass :: measureRead(){
        int chk = DHT11.read(pinUmidTemp);
        if (chk==DHTLIB_OK){
            humidity=DHT11.humidity;
            temperature=DHT11.temperature;
        }
        else{
            humidity=chk;
            temperature=chk;
        }
}

DHT11 library read method code

int dht11::read(int pin)
{
	// BUFFER TO RECEIVE
	uint8_t bits[5];
	uint8_t cnt = 7;
	uint8_t idx = 0;
    
	// EMPTY BUFFER
	for (int i=0; i< 5; i++) bits[i] = 0;
    
	// REQUEST SAMPLE
	pinMode(pin, OUTPUT);
	digitalWrite(pin, LOW);
	delay(18);
	digitalWrite(pin, HIGH);
	delayMicroseconds(40);
	pinMode(pin, INPUT);
    
	// ACKNOWLEDGE or TIMEOUT
	unsigned int loopCnt = 10000;
	while(digitalRead(pin) == LOW)
		if (loopCnt-- == 0) return DHTLIB_ERROR_TIMEOUT;
    
	loopCnt = 10000;
	while(digitalRead(pin) == HIGH)
		if (loopCnt-- == 0) return DHTLIB_ERROR_TIMEOUT;
    
	// READ OUTPUT - 40 BITS => 5 BYTES or TIMEOUT
	for (int i=0; i<40; i++)
	{
		loopCnt = 10000;
		while(digitalRead(pin) == LOW)
			if (loopCnt-- == 0) return DHTLIB_ERROR_TIMEOUT;
        
		unsigned long t = micros();
        
		loopCnt = 10000;
		while(digitalRead(pin) == HIGH)
			if (loopCnt-- == 0) return DHTLIB_ERROR_TIMEOUT;
        
		if ((micros() - t) > 40) bits[idx] |= (1 << cnt);
		if (cnt == 0)   // next byte?
		{
			cnt = 7;    // restart at MSB
			idx++;      // next byte!
		}
		else cnt--;
	}
    
	// WRITE TO RIGHT VARS
    // as bits[1] and bits[3] are allways zero they are omitted in formulas.
	humidity    = bits[0]; 
	temperature = bits[2]; 
    
	uint8_t sum = bits[0] + bits[2];  
    
	if (bits[4] != sum) return DHTLIB_ERROR_CHECKSUM;
	return DHTLIB_OK;
}