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5. TCP/IP Stack
5.1 Implementation
LZT 123 7607 R1B
5. TCP/IP STACK
An on board IP/TCP/UDP stack has been integrated into the software
negating the need for the customer to implement one in their own code
base.
For early software releases this is only accessible through the embedded
applications (see previous section) using intrinsic functions.
The following types of commands allow various functions:
• Open/closing IP connection - Negotiates/closes a dynamic IP address
with the web server.
• Send/Receive TCP packets - Performs all TCP operations to send and
receive packets.
• Send/Receive UDP packets - Performs all UDP operations to send and
receive packets.
• Resolve URL to an IP address - Similar to nslookup command in DOS
When the unit is set up and controlled using the embedded applications
either the embedded applications or an external application can generate
data to be sent and pass it to the radio device for transmission.
This effectively provides a transparent communication link to an internet
server from the application over GPRS.
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