1. Instroduction

1.1 Background

This project was made in 2011 for Metropolia University of Applied Sciences in cooperation with iBoats project. Project objective was to research Texas Instruments low-powered radio frequency EM430F6137RF900 microcontroller capabilities and it's use of opportunities in different applications.


1.2 EM430F6137RF900

EM430F6137RF900 is Texas Instruments wireless target board is a low-powered development tool for CC430. It allowes user to build a wireless network solution with long lasting battery powered boards. Shipped sample-kit includes two target boards, two antennas and a USB-to-JTAG debugger plus four AAA-batteries to power-up the boards.
(more to come)

1.3 eZ430-Chronos wrist watch


2. SimpliciTI sample applications

Texas Instruments provides four sample applications for users to get-to-know to the various features and capabilities of what SimpliciTI offers. Each example has an explanation what the application does, a detailed procedure for running the application and a clarification of specific features of SimpliciTI that are used. These examples are presented for the users in order of increased complexity:

* Simple Peer-to-Peer - two linked End-Devices communicate directly with each other
* Polling with AP - one End-Device sends data to another sleeping/polling End-Device via an Access Point
* Cascading End Devices - three un-linked End-Devices contially broadcast an alarm
* Access Point as Data Hub - two End-Devices send data to an Access Point Data Hub, with Frequency Agility

Our project team only used two of these examples (Simple Peer-to-Peer and Cascading End Devices) as a base for our own program so we are only focusing into explaining these two. Both examples only uses End-Devices to communicate so we didn't get-to-know to the Access Point coding.

The data is send between End-Devices and Access Points using different logical structures. SimpliciTI provides simple sequence diagrams for each application to demonstrate the structure and the sequences followed by the Talker and the Listener devices. Moving information paths are presented between the devices in different line formats as follows:

(Pic:Figure 37)


2.1 Simple Peer-to-Peer

This example demonstrates the link between two End-Devices, given the role as the Talker and the Listener, established with a direct peer-to-peer connection. To establish a connection, the Talker (presented as ED1 in the diagram below) sends a message to the Listener (presented as ED2) and as ED2 receives the message, it sends a confirmation message back to ED1. As a confirmation message is received by the ED1, it sends another message to ED2. This loop continues forever.

(Pic:Figure 38)

We based both our first- and AD converter program to operate this way. Our first program was pretty much a simplified program code, with a message counter, based on this example as the objective was just to estalish a connection between the two End-Devices. 
(more to come)


2.2 Cascading End Devices

In this example, 


3. Specifications

4. Results