Note
If the Tag battery level is below 50% - or below 10% when in charging - the FW update is not
allowed. The corresponding error code in ERC is
TU
. To update the firmware, please first
recharge the battery and try again.
4.6 Optimizing Battery Life
The B4 Wi-Fi tag uses an ultra-low power system-on-chip architecture that lowers the power
consumption to minimal, but to ensure optimal performance with targeted lifetime, here are some
considerations.
The principal in optimizing battery life is to determine the maximum interval for location updates,
still sufficient for the use case, to minimize the amount of time the tag is active.
Recommendations for optimizing battery lifetime:
●
Scan only channels that are in use in your network. Typically, because of overlap of channels,
there are only 3 or 4 channels in use from the 11 (or 13/14) available.
●
Use single SSID whenever possible. Using multiple SSIDs requires additional network scans
and decreases battery lifetime.
●
When using dynamic IP addressing tune the DHCP server to provide very long lease times
for tags.
●
The tag supports roaming between subnetworks. This feature renews tag’s IP address
whenever the access point association changes. Since renewing IP addresses consumes
large amounts of energy, it is strongly recommended not to use the network wide dynamic
addressing feature if it is not needed.
●
Tune the wake up settings to match your application needs. More frequent updates lower the
battery lifetime.
Tip
The battery level can be checked by briefly pressing the Menu button. The text
will disappear automatically in a few seconds.
4.7 Turning off the B4 Tag
The B4 tag can only be turned off by resetting the tag to factory settings which is explained in
chapter
Resetting to Factory Settings on page 23
. To continue using the tag after resetting, you
have to re-activate it following the instructions explained in chapter
Activation Procedure on page 5
Note
24
Chapter 4. Tag Operation
Summary of Contents for B4
Page 1: ...B4 Wi Fi Badge Tag User Guide ...
Page 4: ...B4 iv ...
Page 8: ...4 Chapter 1 Introduction ...
Page 20: ...16 Chapter 2 Initial Activation of the Tag ...
Page 36: ...32 Chapter 7 Limited Warranty ...