XLogger app
XLogger is an Xposed module that captures and records messages transmitted via NFC and Bluetooth interfaces on the device. Requires Xposed framework to be installed on the device.
This module allows you to sniff and record messages transmitted via NFC and Bluetooth. Note that it can intercept only the data that is sent or received by YOUR device and not just ANY wireless devices around you that communicate with each other over the air.
The main purpose of this module is to help to understand what and how exactly applications transmit with device's wireless interfaces, to assist in reverse engineering of Android apps that use Bluetooth of NFC API, and perhaps to fulfill the curiosity of some people who would like to see what that app does under the hood but they don't want to invest in special hardware and setup the wireless lab.
This module supports LSPosed.