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CONFIGURING AND COMMUNICATING WITH YOUR DEVICE

Configuring Device as UDP Listener to Accept UDP Client Connections

To configure the device as a UDP client:

1. Check signal strength.

Enter:

AT+CSQ

2. If using a SIM card, configure the APN.

Enter:

AT+CGDCONT=1,IP,"XXX.APN.com" where XXX.APN.com is the APN your cellular provider assigned to

your SIM card.

3. Verify device is registered on the cellular network.

Enter:

AT+CREG?

4. Configure socket parameters

Enter:

AT#SCFG=1,1,300,240,600,50

5. Activate context one

Enter:

AT#SGACT=1,1

6. Set firewall rule to accept connections:

AT#FRWL=1,"###.##.###.#","###.##.###.#" where ###.##.###.# represents the IP range. For example:

AT#FRWL=1,"204.26.122.1","204.26.122.255"

7. Set connection ID 1 for UDP listening mode on port 7000.

Enter:

AT#SLUDP=1,1,7000

The device responds with and unsolicited indication that a host is trying to connect to connection ID 1 on

port 7000.

SRING: 1

8. Accept incoming connection ID 1

Enter:

AT#SA=1

The device indicates a client successfully established a listener connection.

CONNECT

You can send and receive data.

Exit Data Mode and Close Connection

To exit data mode and close the socket:

■ Enter the escape sequence: +++

■ To close Socket 1, enter: AT#SH=1

The device responds with OK.

■ To close the data connection, enter:AT#SGACT=1,0

30 QuickCarrier™ USB-E MT100UCC-C2 Developer Guide

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