آر اف (فرکانس رادیویی) و بی‌سیم ماژول‌ فرستنده‌گیرنده و مودم آر اف

Product Attributes

Introduction

HLK-B25 is a BLE 5.3 master/slave Bluetooth serial transparent transmission module. It enables various devices with a serial interface to wirelessly send and receive data via Bluetooth simply and quickly. The module can be configured for use as either a Bluetooth slave or master device. Master mode supports connection to one slave, while slave mode supports up to one master connection. Its serial-to-Bluetooth bidirectional transparent transmission function allows users to add Bluetooth wireless capability to serial devices without any knowledge of the complex Bluetooth protocol stack — simply connect the device or MCU's serial port to the module, and the module automatically handles bidirectional data forwarding between the serial interface and Bluetooth GATT, effectively bridging the user's MCU serial port and Bluetooth devices. The module supports AT command mode, allowing basic parameters such as device name and serial baud rate to be queried or configured via serial AT commands. It also provides a rich set of testing tools and documentation, including a mobile app demo, enabling users to get up to speed quickly.

Features

• 96MHz clock speed, 32-bit processor
• Fast and stable Bluetooth-to-serial transparent transmission, serial baud rate up to 921600
• Master/slave Bluetooth, configurable as master or slave mode
• Supports custom advertising data
• Based on BLE5.3, faster speed and longer transmission range, up to 50m in open environments
• Supports low-power mode, sleep current of 462μA, supports custom connection and advertising intervals
• Adjustable Bluetooth transmit power up to 8dBm, receive sensitivity up to -92dBm
• Supports OTA wireless firmware upgrade and wireless module parameter configuration
• Default onboard antenna for effective cost control, providing strong wireless signal at low cost
• Built-in watchdog for reliable long-term operation
• Wide operating voltage range 1.8V to 3.4V, typical value 3.0V
• Bluetooth BQB certified

Applications

• Smart Home/Appliances
• IoT
• Instrumentation
• Industrial & Agricultural Control
• Medical & Healthcare