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Output Control
Outputs are controlled by sending a text message containing "on", "off" or "pulse" and the output
name. In this example Output 1 has been renamed 'Fan'
-
Turn the specified output on
ON <output name> e.g. ON Fan
-
Turn the specified output off
OFF <output name> e.g. OFF Fan
-
To pulse an output on for one second then off again
PULSE <output name> e.g. "PULSE Fan", or "PULSE fan 1 sec"
For security, outputs can only be controlled by phone numbers in the SMS Lite's phone list.
If the phone number is not in the phone list, the command will not be processed.
Status LED
The SMS Lite has a status LED, labelled 'Link' located next to the antenna connection.
Status Indication
The LED indicates the following status information and events:
Power Up – 5 slow flashes - displayed when the SMS Lite powers up.
Heartbeat – 1 short flash every two seconds - the SMS Lite is connected to the cellular network.
Transmit OK – 5 short flashes - shows the SMS Lite successfully sent an SMS.
Transmit Fault – 3 long flashes - shows the SMS Lite tried to send but there was a problem.
Error Code Indication
The LED also indicates error codes that can be used to help identify issues:
Error Code 1 - 2 flashes - indicates the Modem will not power up.
This error code requires the SMS Lite be returned to QTech for service.
Error Code 2 - 3 flashes - indicates the Modem will not respond to commands.
This error code requires the SMS Lite be returned to QTech for service.
Error Code 3 - 4 flashes - indicates the SIM card is not inserted.
This error code may be fixed by checking the SIM card inside the SMS Lite.
Error Code 4 - 5 flashes - indicates the SMS Lite is not registered to the cellular network.
This error code is normally caused by a weak cellular signal and may be fixed by selecting a
higher gain antenna.
Error Code 5 - 6 flashes - indicates the cellular operator is not supported by the SMS Lite.
This error code may occur in some overseas locations.
Error Code 6 - 7 flashes - indicates the SIM card is currently busy.
This can occur briefly during the initialisation phase after the SMS Lite is powered up.
This error code may occur if the SIM card is not compatible with the SMS Lite.
Network Error Code - 3 slow flashes – an error code has been received from the phone network.
Indicates the SMS Lite tried to send an SMS but received an error code from the phone
network. Likely causes are having no credit on the SIM card or the cell tower being busy.
SMS Lite 4G– User Guide
© 2022 QTech Data Systems Ltd
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Troubleshooting
