The downside to supporting every feature in a given profile is that a device then must work harder and burn more energy. This eliminates ambiguity and ensures compatibility with any other device that supports the same profile. If a device supports stereo A2DP streaming, for instance, the OS has to be able to stream audio bidirectionally with support for one specialty format ( SBC) and optional support for MP3, AAC, ATRAC, and others. AVRCP (Audio/Video Remote Control Profile, for controlling TVs and entertainment-center gear)ĭevelopers using a particular profile-whether for making phones, desktops, tablets, or watches-should agree to support all the standards for that profile.PAN (Personal Area Network, for sharing Web connections and forming local networks).HID (Human Interface Device-keyboards, mice, presentation clickers).MAP (Message Access Profile, for notifying about or reading text messages or emails).PBAP (Phone Book Access Profile, for accessing contacts and call history).HFP (Hands-Free Profile, for sending and receiving calls).A2DP (Advanced Audio Distribution Profile, for streaming stereo music or recording with a wireless microphone).The technical term for these capabilities is “profiles ,” and profiles’ names are usually obtuse abbreviations.
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To get a better idea of why these issues happen, we spoke with Steve Hegenderfer, director of developer programs at the Bluetooth SIG, the industry group that controls Bluetooth’s trademark, develops certification processes, and approves devices to use its mark. Hegenderfer noted there’s a strong distinction between the two kinds of Bluetooth (both kinds are incorporated into the same major standard): Classic, in which every part of a protocol needs to be supported in order to meet the standard for certification, and Smart, which lets manufacturers pick and choose which parts of a protocol best suit their specific needs.Ĭlassic Bluetooth in a phone, laptop, or other device means a fully capable Bluetooth radio, with the device’s maker choosing which capabilities to enable.
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Sometimes the conflict is between a phone, a fitness tracker, and Bluetooth headphones. The situation usually involves a few Bluetooth devices-say, a phone, a smartwatch, and a car stereo-trying to get along. The problems include failing to pair, audio hiccups, and recurring dropped connections. We’ve received some complaints from our readers about the Bluetooth devices we recommend acting up, working intermittently, or otherwise failing, especially when multiple devices are involved.