Simple Observer
Table of Contents
Introduction
The simple_observer project supports discovery (scanning) functionality. The project also provides an interface to start/stop scanning and display the discovered devices.
Hardware Prerequisites
The default Simple Observer configuration uses the LAUNCHXL-CC2640R2. This hardware configuration is shown in the below image:
For custom hardware, see the Running the SDK on Custom Boards section of the BLE5-Stack User’s Guide.
Software Prerequisites
For information on what versions of Code Composer Studio and IAR Embedded Workbench to use, see the Release Notes located in the docs/ble5stack folder. For information on how to import this project into your IDE workspace and build/run, please refer to The CC2640R2F Platform section in the BLE5-Stack User’s Guide.
Usage
This application uses the UART peripheral to display messages and interact with buttons. This document will use PuTTY to serve as the display for the output of the CC2640R2 LaunchPad. Note that any other serial terminal can be used. The following default parameters are used for the UART peripheral for display:
| UART Param | Default Values |
|---|---|
| Baud Rate | 115200 |
| Data length | 8 bits |
| Parity | None |
| Stop bits | 1 bit |
| Flow Control | None |
Once the Simple Observer sample application starts, the output to the terminal will report its address and the fact that it is initialized and ready to begin discovery, as shown below:
Pressing the right button (BTN-2 on the CC2640R2 LaunchPad) will begin discovery and will print the number of discovered devices:
The left button (BTN-1) can then be used to cycle through the list of devices. It will print the address of each device:
Because this is an observer device, and not a central, no connection with the discovered devices can be formed.