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BT04-A Bluetooth Serial Module
$1.8000
In stock
SKU
COM-03-065
Volume discounts:
- +50 3 % $1.7400
- +100 5 % $1.7100
- +300 7 % $1.6800
- +500 8 % $1.6500
- +1000 10 % $1.6200
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Esp32 A1S WiFi+Bluetooth Audio Module V3 Previous 
BT04-A Bluetooth Serial Module is a UART Bluetooth serial module with a compact form factor and low power consumption. It supports the SP Bluetooth serial port protocol and uses a UART 3.3V level communication interface. The module includes a built-in PCB antenna and is designed for simple serial communication implementations. It also provides pin access for data, reset, power, ground, LED indication, and host interrupt indication.
BT04-A Bluetooth Serial Module combines a small size with a clear set of communication and power parameters. The module operates at 2.4GHz and supports a working voltage range of DC 3.0V to 3.6V. Its transmit power reaches 4dBm maximum, with a reference distance of 10m. The listed operating conditions include working humidity, storage temperature, and working temperature.
Features of BT04-A Bluetooth Serial Module
- UART interface support
- SP Bluetooth serial port protocol support
- Low power consumption
- Built-in PCB antenna
- LED and interrupt indicator pins
Specifications of BT04-A Bluetooth Serial Module
- Model: DX-BT04-A
- Working frequency: 2.4GHz
- Communication interface: UART 3.3V level
- Working voltage: DC 3.0V-3.6V
- RSSI: Not supported
- Communication level: 3.3V
- Transmit power: 4dBm (maximum)
- Reference distance: 10m
- Transmit current: 8.5mA
- Accept current: 8.5mA
- Air speed: 6Kbps
- Antenna interface: Built-in PCB antenna
- Low power current: 400uA
- Receive sensitivity: < -84dBm at 0.1% BER
- Working humidity: 10%-90%
- Storage temperature: -40℃~85℃
- Working temperature: -25℃~75℃
- Module size: 27*13*1.5mm
- Pin-1: UART_TXD, UART data output
- Pin-2: UART_RXD, UART data input
- Pin-11: RESETB, Reset/restart button
- Pin-12: 3.3V
- Pin-13: GND
- Pin-21: GND
- Pin-22: GND
- Pin-24: P12 LED pin
- Pin-25: P12 host interrupt indication port
How to Use BT04-A Bluetooth Serial Module
- Connect Pin-1 and Pin-2 to the UART serial lines.
- Supply DC 3.0V-3.6V to the module.
- Use Pin-11 for reset or restart when needed.
- Monitor Pin-24 and Pin-25 for LED and interrupt indication.
More Info
- Pin-24 slow flashes when not connected and stays lit after connection.
- Pin-25 is low when idle and high when connected.
| Interface Type | UART |
|---|---|
| Operating Voltage (V) | 3.0V-3.6V |
| Operating Current (mA) | 8.5mA (Working), 400uA (Sleep) |
| Operating Temp (°C) | -25 to 75 |
| Dimensions (mm) | 27 x 13 x 1.5 mm |
| Mounting Type | SMD (Surface Mount) |
| Wireless Protocol | Bluetooth Classic |
| Frequency Band | 2.4GHz |
| Data transmission rate | 6Kbps |
| RF Modulation | GFSK |
| TX Power (dBm) | 4dBm |
| Range (m) | 10m |
| SIM Slots | 0 |
| Chipset | DX-BT04-A |
| Modes | Slave |
| Antenna Type | Internal Antenna |
| Receiver Sensitivity | < -84dBm at 0.1% BER |
| Storage Temperature | -40°C to 85°C |
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