the odd arduino and the sht11 sensor which gives negative results

Other Hardware Sensors
1

1.) I have an Arduino that can read data without the sht11 sensor, when I give coding and run, Arduino can display the temperature and humidity readings even when I have reset my arduino, this is very strange, can you guys explain?

2.) When I give the sensor sht11 temperature and humidity readings give negative results

I have attached photos and coding

Tes_SHT11.ino (765 Bytes)

Without Sensor.jpg
Without Sensor.jpg1735×2313 706 KB

With Sensor.jpg
With Sensor.jpg1824×2433 628 KB

Result.jpg
Result.jpg1067×1423 553 KB

2

Looks like there in no connunication..

  • connections ?
  • defective/wrong sensor ?
3

I have tried to enter the coding according to what people use for sht11
i have 3 sht11 sensors and all give the same results

Do these sensors need to be calibrated first or do they need to be converted in value?