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Sending and Receiving Data
Connecting Device to TCP Server as TCP Client
1.
AT+CGDCONT=1,"IPV4V6","apnname"
where apnname is the APN your cellular provider assigned to your SIM card.
2.
Reset the radio module
Enter:
AT+CFUN=1,1
OK
3.
Bring up Data Connection Using Internal IP stack
Enter:
Verizon:
AT#SGACT=3,1
Other Networks:
AT#SGACT=1,1
The device responds with the IP Address the cellular provider assigned to the device on connection,
followed by OK. For example:
#SGACT: 25.194.185.116
OK
4.
Create Client Connection to TCP Server on Port 500
Enter:
AT#SD=1,0,500,"###.##.###.##"
where ###.##.###.## is the TCP server IP Address.
The device responds with OK. The device can send or receive data now without entering additional
commands.
Closing the Socket and the Connection
To close the socket:
1.
Enter the escape sequence:
+++
2.
To close Socket 1, enter:
AT#SH=1
To close the data connection:
Enter:
Verizon:
AT#SGACT=3,0
Other Networks:
AT#SGACT=1,0
The device responds with OK.
Configuring Device as UDP Listener to Accept UDP Client Connections
To configure the device as a UDP client:
®
MultiConnect
Cell MTC-LNA4 User Guide
CONFIGURING AND COMMUNICATING WITH YOUR DEVICE
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