ANNA-B402 is an ultra-small, high-performance, independent Bluetooth low-power module. The system-in-package (SiP) module measures only 6.5 x 6.5 mm, including integrated antenna. Software power serial port services, GATT clients and servers, Bluetooth long range, NFC™ and sync peripherals and core roles are provided for u-blox Bluetooth Low Level.

Hardware Specifications

Chip: Based on the nRF52833 chip from Nordic Semiconductor, it integrates an embedded Arm Cortex -M4 microcontroller with FPU, which can provide efficient processing power and floating-point operation support.

Storage: Equipped with 512kB flash and 128kB RAM, it provides the necessary storage capacity for advanced applications developed using the Open CPU architecture and Nordic SDK.

Size: Using ultra-small system-level package (SiP) technology, the size is only 6.5mm×6.5mm×1.2mm, and the weight is less than 0.1 grams, which is easy to integrate into various small devices.

Interface: Provides a wealth of wired interfaces, including 2x UART, 4x SPI, 33x GPIO pins, 8x ADC channels, 1x USB, 2x I²C, 1x I2S, 4x PWM, 1x QDEC, etc., which can easily connect various peripheral devices.

Features

Bluetooth technology: Supports Bluetooth 5.1 protocol, with Bluetooth direction finding function, including angle of arrival (AoA) and angle of departure (AoD), which is more accurate than using only the received signal strength. Supports Bluetooth Mesh and Bluetooth remote functions, which can achieve more reliable communication range and large-scale device networking. Supports multiple modulation rates such as 2mbit/s, 1mbit/s, 500Kbit/s, 125Kbit/s, etc., to meet the data transmission requirements in different application scenarios.

Other protocol support: In addition to Bluetooth low energy, it also provides support for ZigBee and Thread protocols, as well as NFC-A tag support, which can meet a variety of wireless communication needs and facilitate interaction with other devices or systems.

Security performance: Supports secure startup, secure and simple pairing, uses 128-bit AES encryption and Bluetooth low energy secure connection to ensure the security of data transmission and device connection.

Electrical performance

Power supply: The operating voltage range is 1.7V-3.6V (DC), with a wide voltage adaptation range, and can adapt to different power supply environments.

Power consumption: 6.0mA when active TX@0dBm; 15.5mA when active TX@+8dBm; 6.0mA when RX is on; 1.3µA when in standby mode; 600nA when in sleep mode (wake-up by external events). Low power consumption makes it suitable for battery-powered devices.

Environmental adaptability

Temperature: Industrial standard, certified according to ISO 16750, operating temperature range is - 40°C to + 105°C, and can work stably in extreme temperature environments.

Humidity: 5%-90% relative humidity (non-condensing), can adapt to different humidity environments.

Application areas

Industrial automation: used for wireless communication and control between industrial equipment, such as sensor data acquisition, equipment status monitoring, etc.

Smart buildings and cities: realize intelligent lighting control, air conditioning system management, security equipment linkage, etc., to improve the intelligence level and energy efficiency of buildings.

Low-power sensors: Connect with various low-power sensors to achieve wireless data transmission, which is widely used in environmental monitoring, health care and other fields.

Real-time location system (RTLS) and indoor positioning: Use its Bluetooth direction finding function to provide high-precision indoor positioning services for personnel, assets, etc., which can be used in hospitals, warehouses, shopping malls and other places.

Wearable devices: Integrated into wearable devices such as smart watches and fitness trackers to achieve Bluetooth connection with mobile phones or other devices, transmit data and receive instructions.

ANNA-B402 system architecture

1. Can use built-in antenna or external customized antenna

2. Built-in Nordic nRF52833

3. External UART/SPI/PWM/I2C/I2S/ADC/USB/GPIO

4. Built-in 512KB FLASH and 128KB RAM

5. Built-in NFC function

6. Built-in 32MHz main frequency

7. Reserve external 32.768KHz Crystal for users to flexibly design the best power saving function

u-connectXpress software interface features:

1. No need to develop complex embedded real-time wireless software

2. Avoid major redesign of the system

3. Extensive and easy-to-use command API

4. Host MCU For applications on the ANNA-B4x2, please refer to the example for step-by-step configuration.

Summary

ANNA-B4x2 is a highly integrated BT 5.1 SiP module with the smallest package in the industry, providing complete Bluetooth certification and simplifying the system design for developers. With u-connectXpress middleware, software developers can painlessly experience the Bluetooth communication function.

u-blox's stable and reliable production process in the industry for many years is worthy of being the first choice for industrial control product applications.