Attiny85 chip + DHT11 + DHTNEW library

// bare Attiny85 chip + DHT11 + DHTNEW library

// @ 16 MHz shows ...SENSOR_NOT_READY
// @ 8 MHz shows at first ...WAITING_FOR_READ, then ...TIMEOUT_C
// @ 1 MHz shows ...TIMEOUT_A

// how to program Attiny85 with Arduino:
// https://www.instructables.com/How-to-Program-an-Attiny85-From-an-Arduino-Uno/

// DHTNEW library:
// https://github.com/RobTillaart/DHTNew/

#include <dhtnew.h>

#define DHTPIN 0
#define LED 2

DHTNEW mySensor(DHTPIN);

void setup() {
  pinMode(LED, OUTPUT);
  //mySensor.setDisableIRQ(true);
  mySensor.setType(11);
}

void show_dig(int dig) {
    for (int i = 0; i < dig; i++) {
      digitalWrite(LED, HIGH);
      delay(200);
      digitalWrite(LED, LOW);
      delay(200);
    }
    delay(500);
}

void show_val(int num) {
  int dig = num / 10 % 10;
  show_dig(dig);
  dig = num % 10;
  show_dig(dig);
  delay(1000);
}

void loop() {
  int chk = mySensor.read();
  if (chk == 0) {
    show_val(mySensor.getTemperature());
    show_val(mySensor.getHumidity());
  }
  else {
    show_val(-chk);
  }
  delay(2000);
}