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Version 3 – August 2020

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4.11 Heater

The SHT85 is equipped with an internal heater, which is meant for plausibility checking only. The temperature increase

achieved by the heater depends on various parameters and lies in the range of a few degrees centigrade. It can be

switched on and off by command, see table below. The status is listed in the status register. After a reset the heater is

disabled (default condition).

Command

Hex Code

MSB

LSB

Heater Enable

0x30

6D

Heater Disabled

66

Table 15: Heater command (Clear blocks are controlled by

the microcontroller, grey blocks by the sensor).

4.12 Status Register

The status register contains information on the operational status of the heater, the alert mode and on the execution

status of the last command and the last write sequence. The command to read out the status register is shown in Table

16 whereas a description of the content can be found in Table 17.

Command

Hex code

Read Out of status register

0xF32D

Table 16: Command to read out the status register (Clear

blocks are controlled by the microcontroller, grey blocks by

the sensor).