SPECIFICATIONS

Application: Module

Brand Name: GHPYQKC

Choice: yes

Condition: New

Dissipation Power: Module

High-concerned chemical: none

Operating Temperature: Module

Origin: Mainland China

Package: Module

Supply Voltage: Module

Type: Module

is_customized: Yes

semi_Choice: yes

Bare SMD chip (No baseboard)：Original patch module, no pin header, directly soldered on customer PCB, minimal occupied space for mass production embedded equipment

4Pin breakout board：Only lead out core 4 essential pins (VCC, GND, TXD, RXD), simple wiring for basic transparent transmission project

6Pin breakout board：Full pin version, extra STATE status pin + EN enable pin, support connection detection and module power control

Breakout board integrates voltage regulator circuit, support wide input 3.6~6V power supply (5V MCU directly power); Chip core voltage is 1.8~3.6V (recommended 3.3V). All versions support AT command to modify Bluetooth name, baud rate, pairing password.



Core Technical Specifications

Model: JDY-31

Bluetooth Standard: Bluetooth 3.0 SPP (Classic Bluetooth, NOT BLE)

Working Frequency: 2.4GHz ISM band

Operation Mode: Only Slave (Cannot act as master)

Core Chip Voltage: DC 1.8V ~ 3.6V (3.3V recommended)

Breakout Board Input Voltage: DC 3.6V ~ 6V (Support 5V power directly)

Max Transmission Distance: 30 meters open space

Max Transmit Power: +8dBm

Receiving Sensitivity: -97dBm

SPP Max Throughput: 16KB/s

Default Baud Rate: 9600

Default Pair Code: 1234

Current Consumption

Unconnected broadcast: ~4.7mA

Bluetooth connected: ~7.3mA

Operating Temperature: -40℃ ~ +80℃



Pin Definition Difference

4Pin Breakout Board

1.VCC 2.GND 3.TXD 4.RXD

Only basic communication pins, STATE & EN not lead out.

6Pin Breakout Board

1.STATE | Connection status pin: LOW=disconnected, HIGH=Bluetooth connected

2.RXD | Module receive pin (connect to MCU TX)

3.TXD | Module transmit pin (connect to MCU RX)

4.GND

5.VCC

6.EN | Module enable pin: HIGH=work, LOW=sleep disable; default enable if floating



Key Features

Three versions optional: bare patch chip / 4pin / 6pin breakout, match mass production & maker experiment

Classic Bluetooth 3.0 SPP, stable compatible with Android / Windows (Does NOT support iOS native serial without APP)

Breakout board built-in LDO regulator, 5V Arduino can power directly

Support AT command configuration: device name, baud rate, pair password, restore factory setting

Up to 30m long-distance wireless transmission, better range than HC-06

Standard TTL UART signal, directly connect Arduino, STM32, AVR microcontrollers

6Pin version supports connection status detection and hardware enable control

Low operating current, suitable for battery-powered wireless control projects



Application Scenarios

Smart robot car wireless remote control

Arduino / STM32 wireless serial data transmission

Smart home relay switch, wireless sensor data collector

Bluetooth remote controller, electronic DIY experimental equipment

Industrial simple wireless monitoring equipment

Student electronic competition training accessories