HTU31D RH/T SENSOR IC

Digital Relative Humidity & Temperature Sensor

REV3 01/2021

Page 9

Read T & RH

The Read T & RH command can be used either to read only the temperature or both the temperature and the humidity. The 16

temperature data bits are followed by an 8-bit temperature CRC. The 16 RH data bits are followed by an 8-bit RH CRC. The

data reading can be stopped any time by sending a not acknowledge (nack) and stop sequence. This can be used, for example,

when only the temperature data is needed.

Figure 6 Read T&RH command

Note: The not acknowledge (nack) and stop at the end of the reading is mandatory, otherwise the chip may block the SDA.

Read RH

The Read RH command is available when only the relative humidity (RH) data is needed. The 16 RH data bits are followed by

an 8-bit CRC. When the CRC is not required, the data reading can be stopped after the 16 RH data bits by sending a not

acknowledge (nack) and stop sequence.

Figure 7 Read RH Command

Note: The not acknowledge (nack) and stop at the end of the reading is mandatory, otherwise the chip may block the SDA.