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 Power LED: Green when power is ON, otherwise OFF.
Modem LED: Green when modem is registered to network, otherwise OFF.
GPS LED: Has Four Possible States –
Turned OFF: GPS Service is disabled
Red: Problem with the GPS engine.
Orange: The last reading was non-valid GPS data. Note that it is perfectly normal if the unit from time to time changes the LED color from Green to Orange, as not always there are good GPS reception conditions.
Green: The last reading was of a Valid GPS data.
Data LED: Has 3 Possible States.
Turned OFF: No Messages to be sent.
Red: Messages waiting to be sent. It could mean there is a problem with the sim card but most commonly there is bad signal and the tracker cannot connect to a mobile phone network.
Green: Sending message.
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