Chapter 12
TROUBLESHOOTING
12.1
The modem’s LED does not light
–
Check if the modem has been properly connected to a 5-32V power supply
–
Check if the power connector is properly inserted
–
Check the fuse in the power cord
12.2
The modem’s GREEN LED blinks but does not become stable for a
long time after power up
–
Check if a valid SIM card has been properly inserted
–
Check if the SIM card has been locked (refer to AT+CPIN command in AT command guide)
–
Check if the external power has been properly connected to the modem
–
Check if the network coverage is available
12.3
The modem does not respond to the terminal program
–
Check if the RS232 cable has been properly connected
–
Check if your program has proper settings. Factory setting of the UART port of the modem is:
•
115200 bps
•
8 data bits
•
1 stop bit
•
no parity bit
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Please contact us on
support.maestro-wireless.com
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