Hardware Guide

How to comply with 10 second rule for handheld devices
When the tag is “awake” it sends out a a signal from UWB. We call this “Hello” signal.
If there are anchors (readers) in the area, they send an acknowledgement signal back. When the
tag receives this acknowledgement, it sends the “location” signal (actual data) to the anchor and
goes into “sleeping” mode.
The tag awakens in determined period and send out a a signal from UWB again.
This cycle is repeated continuously depending on the signaling frequency (in most projects the
signaling frequency is 1 signal per second it could go up to 1 signal per 15 seconds)
The whole signaling process takes 5 milliseconds
If there is no acknowledgement response from the anchors, tag goes into deep sleeping mode for
at least 1 minute (is parametric, can be set to be longer).
During deep sleeping mode, tags out a signal in every 10 seconds to check if there are any
anchors in its range. This signal is not sent on UWB, but it is sent on 2,4 Ghz.
If it receives an acknowledgment response, the cycle starts again.
Figure 1: Wipelot MT-02BDC-IP Hardware Structure
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