HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver

HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver - 图片 3

HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver - 图片 4

HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver - 图片 5

SKU N/A Category Bluetooth / BLE Modules Tags 2.4G bluetooth module, arduino bluetooth module, bluetooth module, HC-08, iot wireless module, low power bluetooth, master-slave bluetooth module, serial communication module, UART bluetooth transceiver, wireless serial passthrough 品牌： WAVGAT

HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver

Price :

$1.19 $1.39价格范围：$1.19 至 $1.39

Version

清除

HC-08 Master-Slave BLE Bluetooth Serial Module, 80m long-distance wireless UART pass-through, low power 3.3V TTL, compatible with Arduino MCU, supports mobile Bluetooth transparent transmission for IoT DIY projects.

Description

Product Overview

HC-08 is a dual master-slave integrated BLE Bluetooth serial transparent transmission module, equipped with built-in PCB antenna, supporting 2.4GHz frequency band and up to 80-meter open-space communication distance. It adopts standard 3.3V TTL UART interface, compatible with 3.2~6V wide voltage power supply, works directly with 5V microcontrollers without level conversion. It supports master-slave mutual pairing, realizes full-duplex wireless serial data transmission, widely used in Arduino embedded development, smart devices, wireless data collection and electronic DIY projects.

Core Product Features

✅ Master-Slave Dual Mode Interchangeable

One module can be set as master, the other as slave for automatic pairing, no complex configuration required, realize point-to-point wireless serial communication.

✅ Long Distance & Stable Transmission

Built-in high-gain PCB antenna, 4dBm transmit power, receiving sensitivity up to -85dBm@2Mbps, maximum 80 meters barrier-free communication range.

✅ 3.3V TTL Wide Voltage Compatibility

3.0~3.6V core working voltage, baseboard supports 3.2~6V wide input, built-in reverse polarity protection circuit, directly connect to 5V MCU without level shifter.

✅ Low Power Consumption Design

Low quiescent current, suitable for battery-powered portable IoT equipment, stable operation under long-term power supply.

✅ Dual Form Factor Optional

Bare SMD module: 27×13mm, ultra-small size for embedded integration, 26 gold-plated pads for secondary development.
Baseboard version: 37.5×15.5mm with 6 pin headers (EN/VCC/GND/RXD/TXD/STATE), plug-and-play with MCU serial port.
✅ Intuitive Status Indicator LED
Different flashing modes distinguish pairing status: slow flash = waiting for pairing, steady on = connected, easy to judge working state at a glance.
✅ Full-Duplex Transparent Transmission
No complex Bluetooth protocol development needed after pairing, equivalent to wireless serial cable, default baud rate 9600, supports adjustable parity bit.

Full Technical Specifications

Parameter	Details
Model	HC-08 BLE Bluetooth Module
Working Frequency	2.4GHz
Air Data Rate	2Mbps
Antenna	Onboard PCB Antenna, 4dBm transmit power
Communication Interface	UART 3.3V TTL Level
Core Operating Voltage	3.0~3.6V
Baseboard Input Voltage	3.2~6V (reverse polarity protection)
Receiving Sensitivity	-85dBm@2Mbps
Max Open Communication Distance	80 Meters
Serial Format	8 data bits, 1 stop bit, adjustable parity bit
Default Baud Rate	9600
Operating Temp	25℃ ~ 75℃
Storage Temp	-40℃ ~ 80℃
Operating Humidity	10% ~ 90% Non-condensing
Bare Module Size	27mm × 13mm, Weight 0.9g
Baseboard Module Size	37.5mm × 15.5mm, Weight 3.4g

Pin Definition & Wiring Guide

Baseboard 6 Pin Definition

VCC: Power supply pin, 3.2~6V input
GND: Common ground of module and MCU
TXD: Module serial output (connect to MCU RXD)
RXD: Module serial input (connect to MCU TXD, cross wiring required)
STATE: Connection status pin, low level = unpaired, high level = connected
EN (KEY): Clear pairing memory pin, short to GND to erase paired device info

Wiring Tip

Cross connect TX/RX between module and microcontroller: Module TXD ↔ MCU RXD; Module RXD ↔ MCU TXD, otherwise data cannot be transmitted normally.

Working Status LED Description

Unpaired (no device recorded): LED flashes once per second (100ms bright, 900ms off)
Unpaired (slave address stored): LED flashes once per second (900ms bright, 100ms off)
Slave module waiting for pairing: LED lights 1s every 2s
Successfully paired & connected: LED keeps steady on

Application Scenarios

Embedded MCU wireless communication: Arduino, STM32, ESP32 serial data wireless transmission
Smart home equipment: Wireless sensor data upload, remote switch control
Electronic DIY: Bluetooth robot car, wireless data acquisition, handheld measuring instruments
Portable devices: Battery-powered wireless monitoring equipment, Bluetooth serial debugging tools

Warm Reminder

This is BLE low-power Bluetooth module, cannot directly connect to PC built-in Bluetooth; need to use BLE serial test APP on Android 4.3+/iPhone 4s and above.
Do not exceed 6V input voltage to avoid burning the module; strictly follow cross TX/RX wiring rules.
Product parameters and appearance may be updated without prior notice, please refer to the actual received module.

Downloads

PDF File

HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver

Price :

$1.19 $1.39价格范围：$1.19 至 $1.39

Version

清除

Description

Product Overview

Core Product Features

✅ Master-Slave Dual Mode Interchangeable

One module can be set as master, the other as slave for automatic pairing, no complex configuration required, realize point-to-point wireless serial communication.

✅ Long Distance & Stable Transmission

Built-in high-gain PCB antenna, 4dBm transmit power, receiving sensitivity up to -85dBm@2Mbps, maximum 80 meters barrier-free communication range.

✅ 3.3V TTL Wide Voltage Compatibility

3.0~3.6V core working voltage, baseboard supports 3.2~6V wide input, built-in reverse polarity protection circuit, directly connect to 5V MCU without level shifter.

✅ Low Power Consumption Design

Low quiescent current, suitable for battery-powered portable IoT equipment, stable operation under long-term power supply.

✅ Dual Form Factor Optional

Bare SMD module: 27×13mm, ultra-small size for embedded integration, 26 gold-plated pads for secondary development.
Baseboard version: 37.5×15.5mm with 6 pin headers (EN/VCC/GND/RXD/TXD/STATE), plug-and-play with MCU serial port.
✅ Intuitive Status Indicator LED
Different flashing modes distinguish pairing status: slow flash = waiting for pairing, steady on = connected, easy to judge working state at a glance.
✅ Full-Duplex Transparent Transmission
No complex Bluetooth protocol development needed after pairing, equivalent to wireless serial cable, default baud rate 9600, supports adjustable parity bit.

Full Technical Specifications

Parameter	Details
Model	HC-08 BLE Bluetooth Module
Working Frequency	2.4GHz
Air Data Rate	2Mbps
Antenna	Onboard PCB Antenna, 4dBm transmit power
Communication Interface	UART 3.3V TTL Level
Core Operating Voltage	3.0~3.6V
Baseboard Input Voltage	3.2~6V (reverse polarity protection)
Receiving Sensitivity	-85dBm@2Mbps
Max Open Communication Distance	80 Meters
Serial Format	8 data bits, 1 stop bit, adjustable parity bit
Default Baud Rate	9600
Operating Temp	25℃ ~ 75℃
Storage Temp	-40℃ ~ 80℃
Operating Humidity	10% ~ 90% Non-condensing
Bare Module Size	27mm × 13mm, Weight 0.9g
Baseboard Module Size	37.5mm × 15.5mm, Weight 3.4g

Pin Definition & Wiring Guide

Baseboard 6 Pin Definition

VCC: Power supply pin, 3.2~6V input
GND: Common ground of module and MCU
TXD: Module serial output (connect to MCU RXD)
RXD: Module serial input (connect to MCU TXD, cross wiring required)
STATE: Connection status pin, low level = unpaired, high level = connected
EN (KEY): Clear pairing memory pin, short to GND to erase paired device info

Wiring Tip

Cross connect TX/RX between module and microcontroller: Module TXD ↔ MCU RXD; Module RXD ↔ MCU TXD, otherwise data cannot be transmitted normally.

Working Status LED Description

Unpaired (no device recorded): LED flashes once per second (100ms bright, 900ms off)
Unpaired (slave address stored): LED flashes once per second (900ms bright, 100ms off)
Slave module waiting for pairing: LED lights 1s every 2s
Successfully paired & connected: LED keeps steady on

Application Scenarios

Embedded MCU wireless communication: Arduino, STM32, ESP32 serial data wireless transmission
Smart home equipment: Wireless sensor data upload, remote switch control
Electronic DIY: Bluetooth robot car, wireless data acquisition, handheld measuring instruments
Portable devices: Battery-powered wireless monitoring equipment, Bluetooth serial debugging tools

Warm Reminder

This is BLE low-power Bluetooth module, cannot directly connect to PC built-in Bluetooth; need to use BLE serial test APP on Android 4.3+/iPhone 4s and above.
Do not exceed 6V input voltage to avoid burning the module; strictly follow cross TX/RX wiring rules.
Product parameters and appearance may be updated without prior notice, please refer to the actual received module.

Downloads