Android BLE Passive scan

Question

I want to scan BLE advertisers passively within my Android App.
But I couldn\'t found how to do this.

• According Bluetooth 4.0 Core spec, There exists passi

Answer 1

Find btif_gatt_client.c in AOSP repo, Edit it,

replace

BTM_BleSetScanParams(p_cb->scan_interval, p_cb->scan_window, BTM_BLE_SCAN_MODE_ACTI);

with

BTM_BleSetScanParams(p_cb->scan_interval, p_cb->scan_window, BTM_BLE_SCAN_MODE_PASS);

then build AOSP, flash the image to phone, then passive scan works.