Tag: Bluetooth

Bluetooth Proximity (in parcel)

The talisman will make use of BlueTooth for both communication bridged to the internet and also to detect the proximity of the talisman to beacon units.

 

To confirm the use of the RSSI (Radio Spectrum Signal Strength) and determine the available accuracy and range a device was built.

OLYMPUS DIGITAL CAMERA
OLYMPUS DIGITAL CAMERA

The Bluetooth Proximity device has an internal microprocessor, BlueTooth Module and a 2 line LCD.

After starting, each row in the LCD shows the signal strength reading for each of two example beacons.  This shows that it is possible to detect when the talisman is within proximity of one or more beacon units.

The beacon units are very simple and contain a low cost bluetooth module that is simply permanently powered via a wall plug pack or other USB power source. There is no requirement for the beacon to contain any microprocessor or to connect to the internet.

To test the proof of concept the two beacon should be plugged into a USB power source, and placed in two rooms around a house. Then the LCD display unit should also be powered via the USB cable and moved around to allow observing the possible detection range and accuracy.

Wireless Bridge – USB Module Parts

The parts to be used in the dongle that plugs into a computer arrived. The particular USB Module chosen was selected to work out of the box without requiring hunting for USB drivers.

OLYMPUS DIGITAL CAMERA

This module will be in a small enclosure along with a wireless Bluetooth module.

Together the USB module and the Bluetooth Module will allow a program running on a computer to bridge from the server, over the internet, through the USB module, into the Bluetooth module, over the RF airwaves, into the Talisman Bluetooth Module and finally onto the Talisman device.