This document describes a method for reading the serial number of SHT2x, which is a temperature and humidity sensor produced by Sensirion. The method reads the device serial number information through the I2C interface
The document describes the procedure for reading out the device‑specific serial number of the SHT2x sensor using the I²C serial interface. Two memory‑access sequences are required to retrieve the complete 64‑bit identifier.
It details the communication sequence, the composition of the serial number (16‑bit, 32‑bit, 16‑bit fields), and provides a numeric example illustrating the I²C address (0x40) and the resulting serial number format.
| I²C default address | 0x40 |
|---|---|
| Serial number composition | 16‑bit + 32‑bit + 16‑bit fields |
The serial number can be read via the I²C interface using two memory‑access sequences that follow the standard I²C protocol.
The serial number is a 64‑bit value composed of a 16‑bit part, a 32‑bit part, and another 16‑bit part.