JDY-33 Bluetooth UART Module Serial SPP BLE Slave HC-05 HC-06 Compatible

🔧 JDY-33 Bluetooth UART Module | AuscomTech

The JDY-33 is a compact dual-mode Bluetooth module designed for reliable wireless serial communication using UART.

It supports both classic SPP and BLE protocols, allowing seamless data transmission between microcontrollers, computers, and mobile devices.

Ideal for Arduino, ESP32, and embedded systems where a simple and efficient wireless serial link is required.

⭐ Key Features

• Dual-Mode Operation – Supports SPP (classic Bluetooth) and BLE 4.2 communication
• UART Serial Interface – Easy integration with Arduino, ESP32, STM32 and other microcontrollers
• Slave Mode Operation – Designed for connection to host devices such as phones or PCs
• HC-05 / HC-06 Compatible – Suitable replacement for common serial Bluetooth modules
• AT Command Configuration – Adjustable baud rate, device name, password, and settings
• Low Power Design – Efficient operation with deep sleep support
• Integrated Antenna – Built-in PCB antenna for compact design

📊 Technical Specifications

• Model: JDY-33
• Bluetooth Version: Bluetooth 3.0 SPP + BLE 4.2
• Frequency Band: 2.4 GHz
• Interface: UART (TXD, RXD)
• Operating Voltage: 1.8V – 3.6V (3.3V recommended)
• Working Current: approx. 6.5 mA
• Deep Sleep Current: <10 µA
• Transmission Power: up to 6 dBm
• Receiving Sensitivity: -96 dBm
• Transmission Distance: up to 30 meters
• Antenna: onboard PCB antenna
• Operating Temperature: -40°C to +80°C
• Module Size: approx. 26.7 × 13 × 1.7 mm
• Default Baud Rate: 9600

🧩 Typical Applications

• Arduino and ESP32 wireless communication
• HC-05 / HC-06 module replacement
• Smart home and IoT devices
• Wireless sensor data transmission
• Industrial serial communication
• Bluetooth control systems

⚠️ Important Notes

• 3.3V logic only – use a level shifter when connecting to 5V systems
• Operates in slave mode only
• BLE mode has lower throughput than SPP mode
• Ensure correct TX/RX cross-connection when wiring
• AT commands required for advanced configuration

📦 Package Includes

• 1 × JDY-33 Bluetooth UART Module

🔗 Recommended Accessories (Not Included)

• USB to TTL Converter – configuration and testing
• Dupont Jumper Wires – quick prototyping connections
• 3.3V Voltage Regulator – stable power supply
• Microcontroller Board – Arduino or ESP32 integration