Product Overview

WE-RWN03 network reader through WiFi wireless way to access the network, can be in the WiFi signal place quickly deployed positioning base station. The reader detects the tag at a distance of up to 150 meters in the open, and can not only read the ID value of the electronic tag, but also calculate the actual distance of the tag by measuring the wireless signal field strength of the electronic tag. A number of base stations (readers) work together, can determine the effective range of the specific location of the electronic tag, realize the personnel, goods location of real-time monitoring, convenient personnel, goods tracking and finding.

The WE-RWN03 Network Reader can be fitted with 2 reader antennas, which can be used separately as 2 independent base stations on their own, or combined as 2 back-to-back antennas together for one base station.

Application Areas

Intelligent warehouse management, logistics tracking, indoor navigation, people management and many other application areas.

ZIGBEE distance measurement formula

This product calculates the distance between the electronic tag and the antenna by measuring the wireless signal field strength of the tag, and the distance and the wireless signal strength are in an exponential curve relationship as follows:

Due to chart size limitations, only correspondences within a distance of 7 meters are shown

In the above graph, there are 3 values that we need to measure repeatedly to calibrate.

1. L0: The signal strength when the distance between the tag and the reader is 0 cm, the measured value is -8dBm.

2.L1: Signal strength when the distance between the tag and the reader is 40cm, measured value is -20dBm.

3.L2: Signal strength when the distance between the tag and the reader is 100cm, measured value is -30dBm.

4. Based on these three values, the derived formula is as follows:

For specific algorithm implementation, please refer to our DEMO software source code.