ATTiny85 and DHT11 - Sensor always returning 0
Ok i tried something like that for myself and thanks to this and ..many other posts and forums/videos i could make myself something that works but with a little other setting like in the start post (other libs ect)

in my case the main reason for the "1" output on the oled was this:

  float hu  = (DHT.humidity, 1);    //original

  hu  = (DHT.humidity);       //what worked for me 


Maybe you can figure out more Problems, my code is shure not perfekt! But maybe it helps someone for a vew steps

#include &lt;dht.h&gt;
#include &lt;U8x8lib.h&gt;
#define DHT11_PIN 1
dht DHT;
int temp = 0;
int humi = 0;
char strTemp[4]; 
char strHumi[4];

U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8(/* clock=*/ 2, /* data=*/ 0, /* reset=*/ U8X8_PIN_NONE);         // Digispark ATTiny85 Pin 0 Data, Pin 2 clock



void setup(void)
{

  u8x8.begin();
  u8x8.setPowerSave(0); //enegergiesparen 0 aus

}

void loop(void)
{

  int chk = DHT.read11(DHT11_PIN);

  temp = (DHT.temperature);
  humi = (DHT.humidity);



  u8x8.setFont(u8x8_font_chroma48medium8_r);
  u8x8.drawString(0,0,"~~~~~~~~~~~~~~~~");
  u8x8.drawString(0,1,"Temperatur");
  u8x8.drawString(1,2,( itoa(int(temp), strTemp, 10)));
  u8x8.drawString(4,2,"Grad Celsius");
  u8x8.drawString(1,3,"--------------");
  u8x8.drawString(0,4,"Luftfeuchtigkeit");
  u8x8.drawString(1,5,( itoa(int(humi), strHumi, 10)));
  u8x8.drawString(4,5,"Prozent");
  u8x8.drawString(0,6,"~~~~~~~~~~~~~~~~");
  delay(200);
}