DISCO-B4 H
ARDWARE
M
ANUAL
V
ERSION
1.0.3
6.1.2.4
How to use IGN pin(pin 3)
The IGN-pin has two functions:
✔
It wakes up the system DISCO-B4 from the IGN-sleep mode (when
sleeping),
✔
and can be used to monitor the vehicle ignition state, to report/store the
START and STOP of a trip by using the events
IO.e8=redge
and
IO.e8=fedge
for
START
and
STOP
respectively.
IGN-sleep mode is one of the eight supported energy-saving modes of operation in
which all unnecessary components are shut down. Once the device is awakened by
IGN high signal, it returns to full functionality.
Note that, the DISCO-B4 device
powers on automatically when external power is
applied, and IGN pin provides an additional “wake up” function for the IGN-sleep
mode when it is requested.
Using IGN pin you can configure the system to store a specific location or to deliver
an alarm SMS or TCP packet
if an unauthorised entry to start your vehicle is
attempted.
In such a case use the IGN generated event as a condition to start vehicle
tracking
.
NOTE: All battery powered DISCO-B4 devices are shipped into the IGN-sleep mode
.
Therefore, to wake
up the device, connect the IGN-line to the d.c.-power source.
Figure 9:
Monitoring vehicle starter by IGN line
Figure 9.1:
Use IGN line to wake DISCO-B4 from IGN-Sleep
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