User's Manual

DRAFT TrimTrac 1.5 Technical Manual v0.3ab 29
Stationary Assets
Whereas a personal automobile normally moves on a daily basis, some other
assets may almost never move and, when they do move, it is an extraordinary
event requiring immediate action. Under normal stationary conditions, perhaps
all that is required is a periodic heartbeat from the unit letting the server
application know that it is still alive and functioning.
Using the Scheduled Reporting Mode, Report Delay Flag and Motion Report
Flag, the unit can closely monitor and report upon initial movement while
providing a regularly scheduled heart beat. Expected battery life of four AA
alkaline batteries, assuming default configuration settings, except those depicted
in Table 44, would be approximately 9-10 months even if the asset moved once a
week for an hour or so.
Setting Point Counterpoint
Scheduled Reporting Mode
set to either “1=Daily” or
“2=Weekly”.
Provides a regularly
scheduled
STATUS_MESSAGE
letting the server
application that device is
operational and give a
battery level indication.
Does not cause a new
position fix to be computed
even if there has been
motion since the last logged
position, but in a stationary
application, this should be
of little consequence.
Report Delay Flag set
“2=Transmit Motion-related
Messages-only”
Saves power and
communication costs by not
transmitting any
STATUS_MESSAGE
triggered by expiration of
DELAY Timeout, T4.
If want only Schedule
Report and Motion Report
Triggered messages
transmitted, set Report
Delay Flag to “1=Transmit
Alert, Query response and
Scheduled messages only
”.
Motion Report Flag set
“
1=Report Motion in IDLE
(before attempting new GPS
fix)”
Sends notification to server
application immediately
upon sensing of initial
motion. Then goes and does
a position fix.
May not be worth the extra
data message in some
applications.
Table 9, Stationary Asset Settings
Sample Stationary Configuration Settings
Expected Battery Life: 9-10 Months
See
Page
AT+CTKC= 92
AT+CTKX= 93
Table 10, Sample Non-default Commands for Stationary Configuration