Product Introduction

HLK-B50 is a Bluetooth serial port transparent module developed and produced by Hi-link Electronics. It supports both BR/EDR and BLE dual-mode Bluetooth 5.0, and various devices with serial ports can use Bluetooth wireless transmission and receiving data easily and quickly through this module.

This product supports BLE master-slave integration and can be set to be used as BLE slave or host devices.

By using the serial Bluetooth bidirectional transmission function of this module, users do not need to understand the complex Bluetooth protocol stack. They only need to connect the customer's device or MCU's serial port to this module, and the module will automatically complete the bidirectional data forwarding between the serial port and Bluetooth (GATT or SPP). GATT and SPP can be connected simultaneously, which is like a bridge between the user's MCU serial port and Bluetooth device, adding Bluetooth wireless transmission function to the user's serial device.

Supports AT commands, which can be used to query or set the basic parameters of the module, such as device name, serial port baud rate, etc. Supports Bluetooth BLE wireless configuration module parameters and OTA wireless upgrade module firmware;

This module provides rich testing tools and user documentation, including a mobile app demo, making it easy for users to quickly become familiar with and apply this module. The module has abundant on-chip resources and external pins, which can provide flexible and in-depth software and hardware customization development services tailored to the specific needs of customers. 

The schematic diagram of the Bluetooth serial port transparent function is as follows:

Product characteristics

• Built in 32-bit ARM Cortex M3 core, with a main frequency of up to 48MHz,

• Fast and stable Bluetooth serial port transmission, with a baud rate of up to 921600

• Master slave integrated Bluetooth BLE 5.0, can be set to either master or slave mode, supports binding encryption

• Dual mode Bluetooth, capable of data transmission through GATT or SPP, and can be connected simultaneously

• Supports A2DP V1.3 and AVRCP V1.6, with built-in Audio CODEC

• Built in lithium battery charging circuit, charging current can reach 200mA

• Built in LDO, adjustable LDO output voltage

• Built in Watchdog for reliable long-term operation

• Wide working voltage of 2.6~4.2V, typical value of 3.3V

• Rich output pins (UART, I2C, SPI, GPIO, ADC, PWM, I2S, etc.) can provide flexible and in-depth customized software and hardware development services

Application scenarios

The serial Bluetooth bidirectional transparent transmission provided by HLK-B50 provides a simple and flexible data channel, which can be widely used in various products that require wireless data transmission through Bluetooth.

At the same time, this module is equipped with a 32-bit ARM Cortex M3 core, as well as rich peripheral and interface resources, which can replace some microcontroller functions and directly serve as the main control, reducing costs and improving integration for customer products.

Common application scenarios are as follows:

• Smart Home/Home Appliances
  

Control smart sockets, smart lights, smart door locks, etc. through mobile phones

• Internet of Things

Wireless data transmission between mobile phones and devices, devices and devices

• Bluetooth speaker

• Instrumentation

Reading data and configuring parameters wirelessly through Bluetooth

• Industrial and agricultural control

Connect various control or sensing devices wirelessly through Bluetooth for reading and control, etc

• Medical health

Health data monitoring, wireless care devices, etc

• Automotive Electronics

Wireless detection and control, etc

• Toy entertainment

Bluetooth remote control, wireless control and transmission

More possibilities await you to unlock

For more please feel free to contact us.