ME500-X
Trackunit ME500-X, Technical Manual v.1.1, January
2016
Page 13
Status SMS Commands
In order to control if the installation of the ME500-X unit has been done correctly, it is
possible to send one or more check SMS messages to the GSM phone number allocated
to the unit.
Please wait 1 minute after applying the power to the unit before attempting to send any
SMS messages to the unit.
An overview of the SMS message commands for functionality check is given below:
Check
Send SMS Return SMS from unit
•
Is the unit powered up?
•
Does the GPS receiver have
sufficient reception conditions?
•
Is the GSM signal coverage
sufficient?
NOTE:
It is best to perform this check
under outdoor conditions as any
buildings/garage would reduce signal
quality.
MT SIGNAL
MTC ACK (SERIAL No.) SIGNAL: GSM=22,
SAT=8, SN=44
”GSM” is a measure for the quality of the
GSM coverage. The value should be at least
10. Maximum value for GSM and UMTS
coverage is 31
.
”SAT” is a measure for the number of GPS
satellites visible to the GPS receiver.
Operational minimum is 3 and the best
operation is obtained from 6 and up.
”SN” is a measure for the GPS-signal
strength. Should be larger than 35.
•
Are the digital inputs mounted
correctly
NOTE:
This command can be send to
the unit under various operational
conditions like: Machine running,
ignition only or off.
MT STAT
MTC ACK (SERIAL No.) INPUT STATUS:
INPUT1 LOW, INPUT2 LOW, INPUT4 LOW,
CHARGE VOLTAGE ON
NOTE:
An input is
HIGH
if there is more
than 8V on the input – otherwise it would
be
LOW
NOTE:
For the “Send SMS” it is of no importance if small or capital letters are used in
the command string, or a mixture hereof.
