Integrator's Manual GR47/GR48

10. TCP/IP STACK

LZT 123 7589 R1A

10. 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.

This is only accessible by using an embedded applications (see section 9)

using intrinsic functions.

10.1 Implementation

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 from the

application to an internet server over GPRS.