ThingMagic Autonomous Configuration Tool - Manual (Page 6)

Autonomous Reading Overview
Autonomous Configuration Tool v1.0 User Guide 6
Autonomous Reading Overview
Autonomous operation allows the reader to be configured for two basic behaviors:
Read On Boot
When Read & Write Settings | Autonomous Read = enabled and Auto-read on GPI =
disabled the reader will start reading within 150ms of powering up. As tags are read it will
stream the results in the . Reader Data Packet Format
To stop reading you must shut down the reader (cut power or use the moduleʼs
SHUTDOWN line).
When using SHUTDOWN line to start/stop reads, the time from setting
SHUTDOWN=HIGH to first tag read is ~150ms.
Note
This mode is recommended when maximum power savings is a high priority and
the small delay of 150ms from power on to read can be tolerated.
Read On GPI Trigger
When Read & Write Settings | Autonomous Read = enabled and Auto-read on GPI =
enabled the reader will start reading as soon as the specified GPI is set HIGH. As tags
are read it will stream the results in the Reader Data Packet Format .
When GPI is low, a Temperature Status Message will be returned approximately every
250ms (this will vary based on the Region setting used as it depends on the internal
frequency hopping algorithm which is dependent on the region of operation).
This mode allows for very fast read response to GPI triggers: less than 15ms from set
GPI=High to first tag read.
This mode will draw up to 3.2W (at 30dBm power setting) while idle (GPI=LOW). Idle
power consumption decreases with lower RF power settings.
Note
GPI Trigger mode is only recommended when very fast response time to a read
trigger event is required due to the high idle power consumption.