I want to send data from the device to the server in some way.
We plan to connect the device and Android via Bluetooth and connect to the network using Android's 4G line.
I have to communicate with power saving. So, I'm planning to use Bluetooth (or BLE).
If Bluetooth tethering is available I do not need to create an Android gateway application.
Please tell me if it is available.
IDE : Arduino IDE
Server OS : Ubuntu 16.04 LTS