Specifications

5.14. Status LEDs

The GSM Commander has 2 LEDs to show the current status of the GSM Commander. The

red LED, labeled “GSM”, shows the status of the internal GSM cellular engine, while the green

LED, labeled “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

RED LED (GSM)

➢ OFF : GSM engine OFF

➢ on for 600ms, off for 600ms (1 flash per second)

: GSM engine not finding network

➢ on for 75ms, off for 3000ms (1 flash every 3 seconds)

: GSM engine registered OK

5.15. Testing the GSM Commander

5.15.1. Status Request

The GSM Commander (even with a blank configuration) has a built-in test feature. If the GSM

Commander receives “TEST GSMC” as an SMS message, it will reply to the number that

sent the message, with the following text:

DT=01/01/2010-12:00:00 < Indicates current date & time of the GSM Commander

Sig=68% < Indicates the received signal strength

FW=6.01 < Indicates the firmware version

SN=100641-02435 < Indicates the serial number

Airt=35 < Indicates the amount of airtime remaining

Power=On < Indicates status of mains power

Please Note: The airtime remaining will be displayed as “Airt=???” if airtime checking has

been disabled or the incorrect network operator has been chosen in the current setup.