What is Eddystone?

It is a standard for beacons using Bluetooth Smart that can be used on multiple platforms that support Bluetooth Smart, such as Android and iOS. Program codes related to Eddystone are published on GitHub and can be redistributed under the Apache 2.0 license, so anyone can use it easily.

Eddystone specifies the following three types of data transmission methods:
・Eddystone-UID: Send ID
・Eddystone-URL: Send a URL
・Eddystone-TLM: Transmits information on temperature, time since startup, and remaining battery level
　

used this time

Sensor Tags

・CC2650STK Evaluation kit for transmitting various types of sensors via Bluetooth Smart

・CC-DEVPACK-DEBUG Debugger board that adds debugging functionality

software

・Bluetooth Smart stack provided on the TI website
　BLE-STACK-2-1-1

・ Sample code for Eddystone Beacon (There is a link at the bottom of the Introduction of the procedure manual published by TI.)

・Integrated development environment Code Composer Studio 6.1.1 *Explained in CCS below

Build procedure

Two folders from the sample code published on GitHub,
・Simple Eddystone Beacon
・Profiles

Copy it under the following folder created by installing BLE-STACK-2-1-1.
C:\ti\simplelink\blecc26xx20100_44423\Projects\ble

Start CCS
C:\ti\simplelink\blecc26xx20100_44423\Projects\ble\SimpleEddystoneBeacon
Import and build the following two projects in .
・Simple Eddystone Beacon
・SimpleEddystoneBeaconStack


Although the procedure is not specified,
Open targetConfigs/CC2640F128.ccxml for both SimpleEddystoneBeacon and SimpleEddystoneBeaconStack and select the following Connection.

If the build is successful, it should work as Eddystone Beacon if you use CCS debug.

Now let's check the operation.
Execute (debug) SimpleEddystoneBeaconStack first and then execute (debug) SimpleEddystoneBeacon.

Operation confirmation at last!

The Android app Eddystone Validator can only work on Lollipop 5.1, and I didn't have a compatible device at hand, so I used Evothings Studio 2.0 beta 2 Examples "Eddystone Scan" to check the operation.

Two types of data, Eddystone-UID and Eddystone-TLM, could be viewed on one screen.

• Eddystone-UID (appeared immediately after connecting)

・NID: `NID: 10-byte Namespace`
・BID: `BID: 6-byte Instance`

• Eddystone-TLM (took a while to appear)

・Voltage : `VBATT : Battery voltage, 1mV/bit`
・Temperature: `TEMP: Beacon temperature` (19.5 fixed)
・ADV_CNT: `ADV_CNT: Advertising PDU count`
・DSEC_CNT : `SEC_CNT : Time since power-on or reboot`

Summary

It looks difficult if you just look at the procedure, but you can easily make an Eddystone Beacon just by copying files!
This time, we checked the operation on iOS, but you can also check the operation on Android, so anyone with a smartphone can easily see the movement of Eddystone.

Please try it!