JDY-33 Dual Mode Bluetooth Serial Port SPP Bluetooth Module

JDY-33 Dual mode Bluetooth serial Port SPP Bluetooth Module is a high-performance wireless communication device designed to bridge microcontroller serial interfaces with modern Bluetooth-enabled host platforms. This versatile module supports both Bluetooth SPP and Bluetooth Low Energy protocols, enabling seamless data transmission across Android and iOS devices. Consequently, developers deploy it extensively in industrial automation, smart instrumentation, and DIY electronics projects. Furthermore, the pin-compatible footprint allows engineers to drop it directly into legacy layouts designed for HC-05 and HC-06 modules. Therefore, upgrading older serial wireless links requires minimal hardware modification while delivering enhanced multi-platform connectivity.

Key Features:

• Dual-Mode Operation: Supports both classic Bluetooth SPP and BLE protocols for broad compatibility with smartphones and computers.
• Backward Compatibility: Matches the physical pinout of traditional HC-05, HC-06, and JDY-31 modules for drop-in replacements.
• Transparent Serial Communication: Transmits UART serial data transparently without requiring complex protocol stacks on the host microcontroller.
• Configurable Baud Rates: Supports multiple standard baud rates via simple AT commands for flexible system integration.
• Low Power Consumption: Incorporates advanced sleep and working modes to optimize battery performance in portable applications.

Technical Specifications:

• Working Frequency: 2.4 GHz ISM band
• Communication Interface: UART Serial Port
• Operating Voltage: 3.3V to 5.0V DC logic compatibility
• Transmission Distance: ≈ 30 meters in open spaces
• Bluetooth Version: Bluetooth 3.0 SPP plus BLE 4.2
• Working Current: ≈ 6 mA during active transmission

Mechanical Specifications:

• Pin Layout: Standard 6-pin breakout header arrangement
• Antenna Type: Onboard printed PCB antenna
• PCB Material: FR4 double-sided high-frequency board
• Mounting: Standard through-hole header pins for breadboard and socket installation

Dimensions:

• Module Length: ≈ 27.0 mm
• Module Width: ≈ 13.0 mm
• Board Thickness: ≈ 0.8 mm
• Weight: ≈ 2.0 g

Pinout and Wiring:

• VCC: Connects to a stable 3.3V or 5V power supply source.
• GND: Connects to the system common ground rail.
• TXD: Serial data output pin connecting to the MCU RX pin.
• RXD: Serial data input pin connecting to the MCU TX pin.
• CON: Connection status indicator output pin.
• EN: Sleep mode control or AT command configuration pin.
• Note: However, verify that your microcontroller TX voltage matches the 3.3V logic tolerance of the RX input pin to prevent damage.

Datasheet Reference:

• Download JDY-33 Dual Mode Bluetooth Module Datasheet

Commonly Used in:

• Wireless Data Loggers: Streaming sensor readings directly to mobile applications for real-time analysis.
• DIY Robotics: Controlling wheeled robots and custom automation rigs via smartphone apps.
• Industrial Diagnostics: Interfacing handheld diagnostic equipment with modern control tablets.

Applications:

• Smart Home Automation: Configuring microcontrollers wirelessly through custom mobile user interfaces.
• Medical Instruments: Transmitting patient monitoring metrics to local smartphone consoles securely.
• Automotive Diagnostics: Linking OBD-II scanner circuits with diagnostic terminal applications.

Equivalent Models:

• HC-05 Bluetooth Module: A classic classic-only Bluetooth module with identical physical header spacing.
• JDY-31 Bluetooth Module: A classic Bluetooth SPP module featuring simple serial AT commands, although lacking BLE support.
• HM-10 BLE Module: A dedicated low-energy module suited exclusively for iOS and Android BLE peripherals.

Package Includes:

• 1 x JDY-33 Dual mode Bluetooth serial Port SPP Bluetooth Module