April 2012

Doc ID 022381 Rev 1

1/28

UM1479

User manual

STEVAL-IPR002V1: M24LR64-R based data logger and

event logger

Introduction

The M24LR64-R is a dual interface EEPROM which targets a wide range of applications

such as industrial or medical equipment and consumer electronics. RFID (13.56 MHz) and

guide describes how to use the “M24LR64-R data logger/event logger”, an autonomous

battery-powered RFID tag with logging capability for recording and storing the sensor data

of the following sensors:

The value of different sensors is stored inside the EEPROM and these logged values can

then be retrieved over the RFID interface for evaluation at a later stage. This data logger can

be inserted along with any transported article and this article can then be tracked

throughout the supply chain, and the data can be scanned at any point using an RFID

reader.

This system can operate in two modes:

In data logger mode, the system reads all the sensor values once every second and stores

them inside the EEPROM. The system stops logging the data when the allocated memory

for a particular sensor is filled. In event logger mode, the system configures the threshold

limits for each sensor. Whenever the sense value is outside the set threshold limits, it is

stored in the EEPROM.

Figure 1.

M24LR64 EEPROM-based data logger

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