Although since 2012, many development boards with Bluetooth function have entered our field of vision, but we did not get enough development resources on the Bluetooth module until the first half of 2013, and we were able to let go. Go directly to select some boards that have their own Bluetooth module.
With the advent of Bluetooth 4.0, the new Bluetooth Low Energy (BLE) technology for us, especially for Maker, means that we have a lower energy consumption and functional composition during development. There are more options for wireless connectivity modules.
This means that we can implement some of the features that we had to abandon because of hardware limitations on our products.
Does Bluetooth 4.0 support aptx technology?Certainly not all Bluetooth 4.0 support aptx, CRS Bluetooth version also has a lot of unsupported, APT-X is support for playing lossless music.
What are the Bluetooth modules?In fact, this question is very general. First, answer the Bluetooth module of the widely used CSR 86xx series.
The current mainstream CSR Bluetooth module 86XX series generally consists of:
1, Bluetooth SOC, (Bluetooth chip such as CS8635)
2, clock crystal (generally 16MHz / 26M / 32MHz),;
3, RF bandpass filter + ANT (ceramic antenna or PCB antenna);
4, SMPS power inductor (and filter capacitor);
5, extended storage EEPROM or SPI FLASH;
6, PCB board (all the above components are installed on the PCB board, generally 4 layers, the board side is generally open metallized half hole for connecting peripheral circuits)
The above is just an example of a typical CSR solution audio module. Some modules have internal EEPROM integration so they can work without external storage. Some low-power chips do not require external power inductors; some modules do not require RF antennas to save space. On the module, but as a module, the most basic is: a SOC + PCB + minimum application circuit (filter capacitor, patch crystal oscillator)
1, voice, audio SOC, generally used to make speakers, audio-visual products. Such as CSR8610, CS8635;
2, pure data transmission class SOC, generally used to transmit close distance, small data transmission (also called transparent transmission module, BLE module, low power consumption module, etc.), such as CSR1010, TI's CC2540/2541; can be used Use the sensor to do some pedometer, heart rate, blood pressure, blood oxygen content and other low-power personal health equipment (can not transmit, nor audio decoding).
3, voice and data composite SOC, can simultaneously transmit voice, audio, data, such as CSR8670, 8675 and so on.
There is also a classification method:According to whether the Bluetooth chip is cured by the Bluetooth protocol:
1, ROM board, the Bluetooth protocol supported by the chip has been solidified at the factory, such as the Bluetooth protocol of CSR8635:
â– Bluetooth v4.0 specificaTIon support
â– A2DP v1.2
â– AVRCP v1.4
â– HFP v1.6
â– HSP v1.2
â– DI v1.3
It supports the above Bluetooth protocol, so the 8635 can only be used to make audio equipment such as headphones, speakers, hands-free calls.
2, FLASH version, no curing protocol, you need to choose and configure the required Bluetooth protocol in the development environment. For example, CSR8670 can be used to make all kinds of strange Bluetooth devices, Bluetooth heart rate, pedometer, Bluetooth temperature level, Bluetooth port, Bluetooth speaker, Bluetooth headset, Bluetooth watch, etc. ROM chip can do FLASH chip can do The ROM version of the chip can not be done, FLASH can also do it.
According to the chip brand, there are CSR, TI, Broadcom, ISSC, Nordic, RDA and so on. Among them, CSR, TI, Broadcom, and ISSC are the most complete product lines, from classic Bluetooth.
Low-power Bluetooth, to Bluetooth dual-mode have launched the corresponding products. Nordic is mainly based on low-power Bluetooth, while RDA is dominated by classic Bluetooth.
The classic Bluetooth module can consider CSR, ISSC and RDA solutions.
In terms of pure audio, there are also many high-priced brands in China, Jianrong, Mountain View, Jieli, etc.
4.0 Bluetooth module with TI, Nordic two homes,
The Bluetooth dual-mode module is mainly concentrated in CSR, TI, ISSC (Chuangjie was acquired by US Microchip).
The dual-mode Bluetooth module currently mainly has Chuangjie, Feiyitong, Zhongyi Tengda and so on.
Divided by module manufacturer:
Classic Bluetooth module is mainly divided into speakers and car electronics
The traditional speaker industry currently has core core, Bo Pengfa and other relatively large manufacturers.
Automotive electronics include Hui Han, Jia Shi, Wen Qiang and other established manufacturers.
4.0 Bluetooth data transmission module to Xinchida, Bide two earlier, and a rising star is Shanghai Tai Lingwei
Now compare the Bluetooth 3.0 and Bluetooth 4.0-based mesh network solutions. In the industry of Bluetooth mesh, the chip should belong to CSR/Tai Lingwei with high popularity. Modules and solutions should be more professional and focused on Weizhi Electronics (http://), from transparent mesh modules to professional The smart lighting module has recently seen that they have opened up the Bluetooth docking channel with the Tmall Wizard. I also think that the next Bluetooth mesh and Bluetooth 5.0 solutions are the future direction of the market.
Semiconductor Moly
Semiconductor Moly
YANGZHOU POSITIONING TECH CO., LTD. , https://www.pst-thyristor.com