23
Troubleshooting
No connection/communication with the modem
If there is no communication with the modem do the following steps:
•
Check all external connections of the modem (RS-232 or USB, power supply)
•
Verify if the power supply is correct (see
•
Check if the COM port is correctly parametrized
•
Check if the program used for communication works properly and if there is no
other program interfering. If yes, close the interfering program.
Receiving ERROR message
Modem answers
ERROR
on AT command in following cases:
•
Syntax of typed AT command is incorrect
– check the command syntax in [1]
•
Parameters of typed AT command are incorrect
– type
AT+CMEE=1
for enabling a
description of the error that occurred. The response now will be in this format:
ERROR
+CME ERROR: <err>
where <err> is a description of the error that occurred
•
Refer to [1] for further details about the occurred error
Summary of Contents for RB900-Pro
Page 1: ...1 Contents...
Page 5: ...5 References 1 Quectel_EC25 EC21_AT_Commands_Manual_V1 1 pdf...
Page 27: ...27 RF specifications...
Page 35: ...35...
