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androidbluetoothandroid-bluetoothpower-managementrssi

Reduce Bluetooth signal strength on Android device

Is there a high-level (Java) or low-level way (using native code) to change Bluetooth signal strength on Android devices to a minimum ?

The goal is to make the device discoverable within a range of 20 centimeters ? Can't find anything at all on Internet regarding this.

Solution

  • You can do so using your custom BLE advertising on android, you can use below modes to set your bluet-tooth discovery range. 

    //Use AdvertiseSettings class

ADVERTISE_MODE_BALANCED : Perform Bluetooth LE advertising in balanced power mode.
ADVERTISE_MODE_LOW_LATENCY : Perform Bluetooth LE advertising in low latency, high power mode.
ADVERTISE_MODE_LOW_POWER : Perform Bluetooth LE advertising in low power mode.

ADVERTISE_TX_POWER_LOW : Advertise using low TX power level.

ADVERTISE_TX_POWER_ULTRA_LOW : Advertise using the lowest transmission (TX) power level.

    Refer this for detail documentation