MIB Interface
The Embedded SNMP Agent manages MIB variables that are located in SNMP_MIB.c, which is a user interface module. This module is in the \Keil\ARM\RL\TCPnet\User folder. You must copy it to your project directory and add it to your project.
The SNMP_MIB.c module has implemented a scaled-down MIB-II Management Information Base. Only the System MIB is defined by default. The user might expand this table by adding his own MIB variables.
The user can register a callback function with a MIB variable. This function gets called, when the SNMP Manager accesses the MIB variable. This concept allows the SNMP Manager to control the SNMP Agent system. For example to change LED outputs, to write text on embedded LCD module, to read push buttons or analog inputs, etc.