This application is only useful for users of the Espressif ESP32 WiFi module.

This application is only useful if your phone/tablet supports Bluetooth Low Energy (BLE) or at least Bluetooth.

This application allows you to setup the WiFi credentials of an ESP32 over a BLE connection or Bluetooth Serial connection.

To use this application your ESP32 must have included
either the BLE code as described in
https://desire.giesecke.tk/index.php/2018/04/06/esp32-wifi-setup-over-ble/
or the Bluetooth Serial code as described in
https://desire.giesecke.tk/index.php/2018/04/10/esp32-wifi-setup-over-bluetooth-serial/
This application and the ESP32 counterpart is open source
Source code for ESP32 (BLE):
https://bitbucket.org/beegee1962/esp32_wifi_ble_esp32
Source code for ESP32 (Bluetooth Serial):
https://bitbucket.org/beegee1962/esp32_wifi_bts_esp32
Source code for Android:
https://bitbucket.org/beegee1962/esp32_wifi_ble_android

Why is this application requiring location permission?
Since Android version 5.1 the use of Bluetooth is requiring the user to ask for permission of location. Don't ask me why, I never understood the link between using Bluetooth and using the GPS.