Specifications and Features of HLK B20 Bluetooth Module
The HLK B20 Bluetooth Module is a next-generation BLE 4.2 control module developed by Hi-Link. This low-power Bluetooth module features a high-speed ARM9E core MCU and provides seamless wireless communication between serial and Bluetooth interfaces. It is designed for ease of use, with built-in support for AT commands, enabling quick configuration without requiring deep knowledge of Bluetooth protocols.
This module is widely used in the Internet of Things (IoT), smart home automation, industrial control, and embedded systems. It supports dual communication modes: Transparent Transmission Mode for direct data transfer and AT Command Mode for parameter configuration. When connected to a Bluetooth device, the module disables further broadcasting, ensuring a stable and secure connection.
With a compact 4x4 mm package, high-speed 10-bit multi-channel ADC, and rich peripheral interfaces (SPI, I2C, UART, PWM, GPIO), the HLK B20 is ideal for space-constrained applications. Its ultra-low power consumption and 0.9V to 3.6V operating voltage make it suitable for battery-powered devices.
Features: HLK B20 Bluetooth Module
- • Bluetooth Version: BLE 4.2
- • High-Speed Processor: ARM9E core MCU
- • Memory: 160KB programming space, 20KB RAM
- • Operating Voltage: Ultra-low power consumption (0.9V – 3.6V)
- • Dual Modes:
- o Transparent Transmission Mode – Direct data transfer
- o AT Command Mode – Configurable parameters
- • Peripheral Interfaces:
- o SPI, I2C, ADC, UART, PWM, GPIO
- • ADC Support: High-speed 10-bit multi-channel ADC with internal filtering
- • Built-in Crystal: Ensures high stability
- • Compact Design: Small 4x4 mm package
- • IoT Ready: Ideal for wireless applications and embedded systems
Specifications: HLK B20 Bluetooth Module
- • Bluetooth Version: BLE 4.2
- • Processor: High-speed ARM9E core MCU
- • Programming Space: 160KB
- • RAM: 20KB
- • Peripheral Interfaces: SPI, I2C, ADC, UART, PWM, GPIO
- • ADC Resolution: 10-bit multi-channel with internal filtering
- • Operating Voltage: 0.9V – 3.6V
- • Power Consumption: Ultra-low power
- • Package Size: 4x4 mm
- • Built-in Crystal: Yes
- • Operating Temperature: -40°C to 85°C
Package Details: HLK B20 Bluetooth Module
What’s Included?
• 1 x HLK B20 Bluetooth Module
• 1 x User Manual
• 1 x Configuration Guide for AT Commands
FAQs - HLK B20 Bluetooth Module
1. What is the main advantage of the HLK B20 over other Bluetooth modules?
The HLK B20 offers ultra-low power consumption, BLE 4.2 support, and a high-speed ARM9E core MCU for fast data processing.
2. How does the module switch between Transparent Transmission and AT Command modes?
By holding the ES0 pin low for a specific time, users can switch to AT Command Mode to configure settings.
3. Can this module be used for IoT applications?
Yes, the HLK B20 is designed for IoT, industrial automation, and smart home devices.
4. What is the power supply range for the HLK B20?
It operates on 0.9V to 3.6V, making it ideal for low-power applications.
5. Does this module support external antennas?
No, the HLK B20 uses an integrated PCB antenna for wireless communication.
