Introduction
Congratulations on your purchase of the Atmel® AVR®-based Uni-directional Radio Starter Kit featuring Secure Rolling Code RF Transmission Encryption. This kit uses an Atmel STK®500 Flash Microcontroller Starter Kit that must be obtained separately.
This User’s Guide describes how to use this Starter Kit. Section 2, Getting Started, describes how to assemble and program the hardware to demonstrate a wireless link that uses a secure rolling code algorithm. Section 3, Programming Notes, describes optional programming for the advanced user.

General Description
This kit demonstrates the transmission protocol with one receiver and a pair of associated transmitters. However, a typical system can support many more transmitters. Characteristics of this protocol are:
■ A transmission-encryption value that is valid only once, preventing interception and re-transmission to gain unauthorized access,
■ Message content that is virtually impossible to predict, even if previous messages are known.

Included in the Kit
Note: This Radio Starter Kit is not self-contained. It is based on an Atmel STK500 Flash Microcontroller Starter Kit that must be obtained separately.
This starter kit includes all the essential components needed to demonstrate an AVR-based uni-directional radio that features a Secure Rolling-Code RF Transmission Encryption protocol. Contents of this kit are listed and shown in Figure 1-1.
■ Transmitter application board
■ ISP programming adapter for Transmitter
■ Receiver application board with external antenna
■ STK512 Interface Board
■ ATMega88 microcontroller (not shown)
■ CDROM containing software, Data Sheets, and other documentation (not shown)