User's Manual

DRAFT TrimTrac 1.5 Technical Manual v0.3ab 27
Example Applications
Baseline (Default) Application
TrimTrac 1.5 default values are based upon two trips per day (frequency) with
each trip being one hour in length (duration). Market research studies indicate
that most end-user consumers believe a nominal 15-minute position reporting
interval while the vehicle is moving is a good combination of timely information,
reasonable SMS communication costs, and battery life.
This baseline application scenario, assuming good GPS signal strength and GSM
coverage, will yield 10 position reports per day plus one or two status messages
each day, depending upon how the two trips are spaced out over the course of a
day. Typically, four AA alkaline batteries will last for up to 90 days before they
would need to be replaced under this application scenario using factory default
settings.
Command to Return Unit to Default
Configuration
See
Page
AT+CTKE=2 85
Table 6. Provisioning Command for Default Configuration Settings and Log Clearing
Query-to-Fix Applications
Some applications may not need regular position updates but would benefit from
having regularly scheduled status updates, to confirm device health and battery
lever, for instance, and to have the ability to get current position information from
time-to-time when needed.
Setting Point Counterpoint
Report Delay Flag set to
“1=Transmit Alert, Query
response and Scheduled
messages only”.
Saves power and
communication costs by not
transmitting any
STATUS_MESSAGE
triggered by expiration of
DELAY Timeout, T4
Normal reporting is halted
Scheduled Reporting Mode
set to either “1=Weekly” or
“2=Daily” depending upon
how frequently a health and
battery level check is
desired
Set Scheduled Report Time,
T18, to whatever time of
week or day the device is to
transmit a
STATUS_MESSAGE with
TriggerType set
“4=Scheduled Report”
Motion Sensor Override set
to “2=Motion Never”
This will keep the device
from computing a new
Because the device is not
actively computing position