The measured temperature and humidity data are sent to the output register: TEMP_LOW, TEMP_HIGH, RH_LOW and RH_HIGH. The complete temperature and humidity data are represented as 16-bit numbers, so in order to translate to real world values it is necessary to concatenate the low and high register like so:

Where:

• TEMPERATURE_LSB is the 16 bit concatenation of the 8 bit temperature registers
• HUMIDITY_LSB is the 16 bit concatenation of the 8 bit humidity registers

Convert the output value

Please note, these values are not in two's complement, so it is necessary to convert temperature and humidity to °C and %RH respectively using the following equations.

Equation 1.

Equation 1.

Temperature Calculation Example:

1. Output registers:

Temperature value in hex:

Temperature value in decimal:

Temperature value in degree C:

Equation 1.

2. Output registers:

Temperature value in hex:

Temperature value in decimal:

Temperature value in degree C:

Equation 1.

Humidity Calculation Example:

Output registers:

Humidity value in hex:

Humidity value in decimal:

Humidity value in %RH:

Equation 1.