User's Manual

Chapter 2. Tag Operation

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.

 A4 / A4+ tag supports roaming between sub-networks. 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.

Note that when both LEDs are blinking red the A4 / A4+ tag is either doing a self-test or

indicating that the battery is low.

2.5 Turning off the A4 / A4+ Tag

The A4 / A4+ tag can only be turned off by resetting the tag to factory settings which is

explained in chapter Resetting to Factory Settings on page 3. To continue using the tag after

resetting, you have to re-activate it.