Maestro M111 - Troubleshooting; The modems LED does not light; The modems GREEN LED blinks but does not become stable for a long time after power up; The modem does not respond to the terminal program

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
Confidential, the whole document is the sole property of Maestro Wireless Solutions Ltd.
Please contact us on support.maestro-wireless.com
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