The selection of IoT Bluetooth modules, whether single-mode, dual-mode, or dual-mode audio, is described as follows:

The diverse market for Bluetooth chip modules has also brought great difficulties for engineers when selecting, but whether it is semi-finished or finished products, I think choosing a suitable solution is too important. The balance point of selection is just right, neither wasteful nor insufficient. At the same time, try to choose chips from fully competitive large categories to do some niche market applications. In fact, this approach is quite cost-effective. Because you can enjoy the cost advantage brought by larger shipment volume and full competition, as well as complete chip services.

Classification of Bluetooth

Here, I won't go into too much detail about the Bluetooth version, as it can be easily searched online. Personally, I think the Bluetooth classification can be divided into four main categories:

1. Bluetooth audio chip solution

2. Bluetooth data transmission solution - BLE

3. Bluetooth data transmission solution, dual-mode BLE and SPP

4. Bluetooth audio+dual-mode data+KT1025A

As a professional Bluetooth module supplier and solution company, Blue Ocean Sound Technology can provide a variety of industrial grade intelligent Bluetooth module options, including the recent Q21 and A01. This is a highly reliable and low-power Bluetooth 4.2 module with TI's microcontroller (MCU), supporting Bluetooth 4.2 BLE protocol and Bluetooth 5.0, and can operate in a large temperature range of -40 to 85 degrees Celsius. It also has core competitiveness in the industry standards and has passed certifications such as BQB, FCC, CE, RoHS, etc.

Wireless low-power Bluetooth configuration technology refers to obtaining trigger responses and making intelligent decisions based on collaborative perception of changes in the target scene state. It is one of the key supporting technologies of Blue Ocean Sound's core technology - Edge Collaborative Sensing (EICS) technology. As an adaptation to market changes, Blue Ocean Sound actively develops the Bluetooth module LM-C12. This technology involves the field of wireless communication technology in the edge domain of the Internet of Things, mainly involving the wireless communication methods, service mechanisms, and processes between network service nodes and low-power target object devices (and their groups). For different intelligent application scenarios, the IoT edge domain composed of IoT edge service nodes and several target object devices (i.e. network client devices) in the surrounding area, with dynamic information exchange characteristics, mainly aims to solve the service mechanism and process problems of wireless network communication and information exchange between the target object domain and the perception control domain.

1) The specific wireless mode is a low-power Bluetooth mode, wherein the wireless mode parameters include the associated parameters of the wireless Bluetooth device in low-power standby state and wireless transmission state. The wireless master device adjusts the wireless mode parameters to manage the wireless slave devices, including planning, scheduling, and switching.

2) The wireless master adjusts the beacon broadcast parameters of the wireless slave device in state beacon mode by establishing synchronous matching or wireless connection, including beacon broadcast time interval, beacon broadcast duration, and beacon broadcast modulation parameters; When the wireless slave device is in synchronous matching state, the wireless slave device adjusts its beacon broadcast phase time based on its own group sequence code and/or matching code, so that multiple wireless slave devices in the same synchronous matching state maintain a certain beacon broadcast phase time difference.

Blue Ocean Bluetooth Module LM-C12It is an on-chip system designed based on the Bluetooth chip RM12XX, which complies with the BLE 5.0 specification, and a Bluetooth low-energy module consisting of a 2.4GHz radio transceiver, LC filter, 32MHz crystal oscillator, etc.

Featuring a fully integrated low-power, high-performance 2.4GHz wireless transceiver, processor, and 8Mbit embedded flash memory, a 32-bit RISC MCU capable of up to 64MHz, and a wide range of interface peripherals, it integrates Balun, DC DC, 32KHz RC oscillator, and charger.

SoC can be used as an independent communication processor or as a wireless data connection in the main MCU system, including 128KB ROM, 48KB reserved SRAM, 16KB cached SRAM, and up to 2Mb of flash memory.

Supports adjustable memory architecture for storing configuration files, stacked and custom application code, provides rich SDKs, and can be updated using over the air (OTA) technology. The qualified Bluetooth Smart protocol and Wi Fi TCP/IP are stored in dedicated ROM.

It can be connected to any external MCU through SPI, I2C, or UART interfaces, and can also be connected to sensors or other devices through GPIO, supporting iBeacon, elastic broadcasting, and various custom configurations.

Basic purpose:

Embedded into the customer's main control device to achieve UART Bluetooth bidirectional data transmission

*Broadcast, scan and upload Bluetooth objects;

*Synchronize group control and long-distance control of Bluetooth devices;

*Bluetooth connection transparent transmission and data configuration.

Typical application methods:

1. Bluetooth sensor and power monitoring data collection;

2. Wireless multi-mode hybrid networking, efficient and flexible data upload;

3. Control/group control of monitoring equipment, automatically switch to long-distance mode;

4. Multiple wireless modes and their intelligent optimization.

Examples of application areas:

Main functions and features

The low power consumption characteristics of Bluetooth have demonstrated its unique value in many new fields, from consumer electronics to medical electronics, from smart homes to industrial applications. Bluetooth low power consumption is playing an important role in the Internet of Things market. This feature is also an efficient adaptation option for sensors, and the connection between the Internet of Things and the cloud naturally emerged, allowing Bluetooth devices to connect to anything and connect to the network (reading or downloading information from the cloud).