If the LED blinks rapidly a few seconds (2 or 3) and then blinks slowly verify:
That the IP address and port to which the GRD is attempting to connect are the
correct ones.
That there is no reason why the server is rejecting the connection request (ex.
That is requesting identification or authentication).
A connection is established and then it closes
Verify that there is no reason why the server is rejecting the connection request
(ex. That is requesting identification or authentication).
The connection is established but the communication fails
If the Link LED remains constantly on and it does not blink, is indicating that there is
no data reception or transmission. If the Link LED blinks sporadically, it is indicating
that data are being sent and/or received. In any case verify:
That the established broker connection was made to the correct IP address and
port (through SMS with the ‘
state
’ command).
For more information on troubleshooting problems please contact
2020-09-28
GRD-MQ User Manual
Troubleshooting
84 / 84
Содержание GRD-MQ Series
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