WILD Minimal - WiFi RTT proof-of-concept for Android 9 Pie
Revision: 0.1 24-Aug-2018
Designed for ranging to Compulab WILD FTM Responders and tested with Google Pixel
"WILD" stands for WiFi Indoor Location Device
(C) Compulab 2018 https://www.fit-iot.com
Written by Irad Stavi irad@compulab.co.il
Special thanks to Prof. Berthold K.P. Horn of MIT CSAIL http://people.csail.mit.edu/bkph/ for his insightful advice
What the program does:
- Get permissions
- WiFi Scan to detect APs
- Every 2 seconds send a ranging request to APs found in scan that are FTM responders and display the ranging results of each in a table
The program is written to be as simple as possible - a self contained activity with nearly sequential execution.
Below is the flow in a nutshell:
onCreate: Requests permissions and starts 'repeat' which is called every 2 seconds.
repeat: runs a simple state machine: permission_is_granted --(do scan)--> wifi_scan_is_requested --(scan-results received)--> wifi_scan_is_done.
then repeat starts calling range() every 2 seconds.
range: build a 'ranging request' and send. onRangingResults will be called asynchronously when results are ready.
onRangingResults: Display the ranging results in a table (MAC address, measured range, standard deviation, signal strength)
APK installation instructions (may be helpful if you never installed an APK before. If you did - you can skip :)
- Go to https://github.com/Compulab-WILD/WILD-minimal
- Download everything
- Look at the APK directory for the APK file
- Enable "developer mode" on the phone https://www.verizonwireless.com/support/knowledge-base-215055/
- Download and install ADB (found in SDK manager) https://developer.android.com/studio/command-line/adb
- Find where ADB is installed. In my case C:\android-sdk-tools\platform-tools
- Copy wild-minimal.apk to the directory where ADB is
- Connect the phone with USB cable to your host
- Identify the ID of the phone by
> adb devices
- Type command (assuming your phone ID is 01234567890ABCDEF)
> adb -s 01234567890ABCDEF install wild-minimal.apk
- Now you should have "WILD minimal" app on the phone