New Features of Android 4.3 Bluetooth

Rumors about the new features of Android 4.3 refer to two new Bluetooth-related features, which are worth noting.

1. Bluetooth Low Energy (low-power Bluetooth Technology)

Features: The peak energy consumption is only half of that of traditional Bluetooth devices. The device connection time can be up to 3 ms, and the maximum transmission range can be over 100 meters. In the standby mode, the bluetooth module automatically enters the sleep mode, and the power consumption is almost negligible (the previous Bluetooth will still consume power if it is not disabled ).

This technology is a key component of Bluetooth 4.0. It is especially suitable for connections between mobile phones and small Bluetooth devices (such as sensors), as well as one-to-many broadcast messages. Of course, it is not a disruptive technology. It is only used to solve the power consumption problem that currently plagued Bluetooth devices. This problem prevents Bluetooth devices such as mobile phones from being turned on all the time.

Low-Power Bluetooth supports two deployment modes: Standalone mode and duplex mode. The ticket mode is designed for highly integrated and compact devices. It uses a lightweight link layer to provide ultra-low power standby mode operations and point-to-point data transmission to minimize costs. data transmission is unidirectional. In duplex mode, the low-power Bluetooth function is integrated into the existing classic Bluetooth controller. Generally, a low-power stack is added, and the overall architecture remains unchanged. Therefore, the cost increase is limited.

The ticket mode is mainly used for devices that require long-term connection but are not continuously transmitting data, while the duplex mode is suitable for data transmission with different types of products (such as mobile phones or PCs) at the same time.

As a pioneer in the industry, iPhone 4S is the first smart phone to support Bluetooth 4.0 (both hardware and software support), while poor galaxy S2 and Nokia fuse, despite hardware support, but there is no open software interface, which is basically not supported by software development. Now, with the APIS opened by Google, developers can develop many common applications on this function.

At CES 2011 a long time ago, Casio demonstrated a prototype of watch that can communicate with mobile phones, according to Casio, an ordinary button battery can be used for two years in a row for 12 hours a day. Unfortunately, no mobile phones supporting Bluetooth 4.0 were available on the market at that time, so Casio could only show off with the prototype. Now, this regret can be solved. In addition to the highlighted market of smart watches, low-power bluetooth technology can also facilitate users in the following scenarios:

1. Regional Service (lbs), such as allowing users to download vehicle schedule and other related information from the bus station.

2. Shopping Malls, such as downloading product information from shelves.

3. Download flight information at the airport, for example, in the terminal.

4. Smart Home devices, such as mobile phones, control televisions, thermostatic air conditioners, and even other household appliances.

5. vehicles, for example, connected to sensors, monitor the temperature and pressure of tires in real time.

6. Health care, such as being connected to a heart rate monitor, can detect user health data in real time.

 

Opinion: in terms of low power consumption and high transmission distance, Bluetooth 4.0 has obvious advantages. Over time, small devices supporting Bluetooth 4.0 may grow rapidly. What should we do in this wave, think carefully.

Taking health care as an example, we can see both the Fitbit product of the Health tracing device manufacturer and the accessories of Samsung s health. The two are essentially different. However, users are not concerned with the data collected by these devices, but with their own health information, dietary habits, exercises, and recommendations for seeing a doctor.

Over time, the "Hardware sensor + software application" model may be further expanded to provide the entire solution, for example, you can connect your health data with personal cases and hospital medical diagnosis systems to provide comprehensive health services. In this sub-industry, one or two giant companies should be emerging. Fitbit's valuation of $0.3 billion should be able to address some of the issues.

 

2. Bluetooth avrcp 1.3

Avrcp: audio/video remote controlprofile audio/video Remote Control Configuration File

Avrcp is designed to provide standard interfaces for controlling TV and hi-fi devices. The corresponding configuration file is used to permit a single remote control device to control A/V devices connected.

The avrcp 3.0 standard in Bluetooth 1.0 includes pause, stop, start replay, volume control, and upper/lower song.

Avrcp 1.3 adds the following features:

1. Transmit music metadata information (ID3) when playing music)

2. Change the player settings (such as the balancer and playback mode)

3. Fast forward and fast return

I have been thinking about new features for a long time and have not come up with any useful features ......