The JDY-30 (SPP-C) module is a compact Bluetooth 3.0 transceiver designed to replace HC-06 and similar modules. It supports UART serial communication and operates in slave mode, making it ideal for wireless data exchange between microcontrollers and Bluetooth-enabled devices.

Specifications

• Bluetooth Version: 3.0 + EDR (Class 2)
• Compatibility: HC-06, HC-05, JDY-31, BC04
• Operating Voltage: 3.3 V DC
• Logic Level: 3.3 V (requires level shifting for 5 V MCUs)
• Communication Interface: UART (TXD, RXD)
• Default Baud Rate: 9600 (configurable via AT commands)
• Role: Slave only
• Frequency Band: 2.4 GHz – 2.48 GHz ISM band
• Antenna: Integrated PCB RF antenna
• Range: ~10 m (open space)
• Dimensions: ~27 mm × 13 mm
• Pinout:
  - VCC, GND
  - TXD, RXD
  - STATE (connection status)
  - EN (key pin for AT mode)
• Packaging: Bare module (no adapter board or voltage regulator)

Features

• Drop-in replacement for HC-06 with improved stability
• Supports AT command configuration for name, baud rate, and pairing
• Compact and lightweight for embedded PCB designs
• Ideal for wireless serial communication with Arduino, ESP32, STM32
• Common use cases:
  - Bluetooth-controlled Arduino projects
  - Wireless sensor data transmission
  - Serial bridges and automation systems
  - DIY robotics and remote control setups