5.16. Status LEDs
The GSM Commander has 2 LEDs to show the current status of the GSM Commander. The red LED,
labelled “GSM”, shows the status of the internal GSM cellular engine, while the green LED, labelled
“STATUS”, shows the status of the GSM Commander as a whole.
The following table shows how one can determine the current status:
GREEN LED (STATUS)
➢ Solid On
: Busy Booting
➢ on for 500ms, off for 500ms (slow flash)
: All OK
➢ on for 200ms, off for 200ms (fast flash)
: Airtime running low
➢ on for 10ms, off for 500ms (2 short flashes per second)
: Signal is low
➢ on for 50ms, off for 50ms (very fast flash)
: Problem with GSM engine
➢ on for 100ms, off for 500ms, on for 100ms, off for 500ms,
on for 500ms, off for 500ms (2 short and 1 long flash)
: Setup is corrupt
➢ on for 50ms, off for 100ms, on for 50ms, off for 100ms,
on for 50ms, off for 1000ms (3 short flashes)
: Supply voltage below 9,5V
RED LED (GSM)
Applicable to units with SN:xxxxxx- 3 xxxx:
➢ OFF : GSM engine OFF
➢ on for 600ms, off for 600ms
: GSM engine searching for network
➢ on for 75ms, off for 3000ms (1 short flash every 3 seconds)
: GSM engine registered OK
➢ Solid On
: GSM busy with a voice-call
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