Digi International Inc XBEEPRO2 Manual Do Utilizador

T = 0x016A

To convert these to temperature and humidity values, the following equations should be used.

Temperature (°C) = (T / 16), for T < 2048

   = - (T & 0x7FF) / 16, for T >= 2048

Vsupply = (AD2 * 5.1) / 255

Voutput = (AD3 * 5.1) / 255

Relative Humidity = ((Voutput / Vsupply) - 0.16) / (0.0062)

True Humidity = Relative Humidity / (1.0546 - (0.00216 * Temperature (°C)))

Looking at the sample data, we have:

Vsupply = (234 * 5.1 / 255) = 4.68

Voutput = (82 * 5.1 / 255) = 1.64

Temperature = (362 / 16) = 22.625°C

Relative H = (161.2903 * ((1.64/4.68) - 0.16)) = 161.2903 * (0.19043) = 30.71%

True H = (30.71 / (1.0546 - (0.00216 * 22.625))) = (30.71 / 1.00573) = 30.54%