Monday, September 6, 2010

PIC16F886 Temperature and Humidity Meter

SHT11 is a digital humidity and temperature sensor on one chip. This project describes the interface between PIC16F886 microchip and SHT11 sensor and displays the measurements on a LCD display.
In order to get temperature or humidity data, SHT11 needs
  • Connection reset sequence (consists of at least 9 pulse while data is high).
  • Transmission start sequence (consists of lowering data while clock is high follow by lowering and highering clock then release data to high).
  • Command byte (consists of 000 and 5bit command code)
  • wait untill measurement compleated.
  • get 2 bytes data
  • get CRC byte if need.


Read rest of the project.


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