Apple Wireless Diagnostics Daemon (AWDD)

AWDD is a binary logging system for the Baseband, Bluetooth, NFC, GSM/LTE, WiFi, UWB and other such wireless radio coprocessors. Over the years it has taken on a few other responsibilities such as Springboard Locking, FaceID, and any other system level events best represented in a compact binary format. This is in opposition to text based or Plist style log files, which are also still common for other subsystems. AWDD is a proprietary TLV encoding.