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HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver
HC-08 Master-Slave Bluetooth Module Low Power Wireless Serial Transceiver
Price :
$1.65 $1.93价格范围：$1.65 至 $1.93
- Information related to taxation
- Some question to contact us
- Shipping Information
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 :
$1.65 $1.93价格范围：$1.65 至 $1.93
- Information related to taxation
- Some question to contact us
- Shipping Information
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
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