JDY-31 Bluetooth module supports SPP protocol and is fully compatible with HC-05/06 slave Bluetooth 3.0_Various types Modules

JDY-31 Bluetooth module supports SPP protocol and is fully compatible with HC-05/06 slave Bluetooth 3.0

Product Descriptions:

New version JDY-31-V1.3 updated on January 8, 2019

Update content:

1. Solved the issue of V1.2 not being able to connect to the computer

2. Added module to connect to the host and output the MAC function of the host

3. Added AT+ENLOG command, users can use this command to turn on or block the power on, connection, and disconnection of serial port output status

Download detailed information: https://pan.baidu.com/s/1alub7gi9Qa1BJMRDjI4DQQ

1、 Product Introduction and Application

JDY-31 Bluetooth is designed based on Bluetooth 3.0 SPP, which supports transparent data transmission for Windows, Linux, and Android. It operates in a 2.4GHz frequency band, uses GFSK modulation, has a high transmission power of 8db, and a large transmission distance of 30 meters. It supports users to modify device names, baud rates, and other commands through AT commands, making it convenient, fast, and flexible to use.

2、 Product application

JDY-31 is a classic Bluetooth protocol that can communicate with Bluetooth enabled computers (desktop, laptop) and mobile phones (Android). Can be applied to

◆ Windows computer Bluetooth serial port transparent transmission

◆ Android Bluetooth serial port transparent transmission

◆ Smart home control

◆ Automotive ODB testing equipment

◆ Bluetooth toys

◆ Shared power bank, shared weight scale

◆ Medical equipment

3.Module parameters

Model	JDY-31
Working frequency band	2.4GHZ
Communication interface	UART
Working voltage	1.8-3.6V (recommended 3.3V)
Working temperature	-40℃ - 80℃
Antenna	Built in PCB antenna
Transmission distance	30 meters
Master slave support	From machine
Module size	19.6 * 14.94 *1.8 mm (length, width, height)
Bluetooth version	Bluetooth 3.0 SPP
STM welding temperature	<260℃
Not connected to working current	4.7mA
Current after BLE connection	7.3mA
Transmission power	8db (large)
Receiving sensitivity	-97dbm
SPP high throughput	16K bytes/s(android、windows)

4、 Pin functions and applications

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JDY-31 supports SMT and soldering pin arrangement

1. Needle setting application: The needle setting specification is a standard 2.54 pitch needle setting, which only requires welding 5 needle setting holes on the module.

2. Surface mount application: Generally, only four pins VCC, GND, RXD, and TXD need to be connected. If active disconnection is required in the connected state, send AT+DusC in the connected state

5、 Pin Function Description

Pin	Pin function	Pin Function Description
1	TXD	Serial port output pin (TTL level)
2	RXD	Serial port output pin (TTL level)
3	CTS
4	RTS
5	NULL
6	NULL
7	NULL
8	NULL
9	SWI
10	NULL
11	RST	Reset (low level effective)
12	VCC	Power supply (1.8-3.6V)
13	GND	Grounds
14	EN
15	ALED	Broadcast status pin (not connected to flash, outputs high level after connection)
16	STAT	Connect status pin (not connected to low level, outputs high level after connection)
17	SELECT
18	NULL
19	NULL
20	NULL
21	NULL
22	NULL
23	NULL
24	NULL
25	NULL

6、 PCB packaging size

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7、 Serial port AT instruction set

The JDY-32 module's serial port must include the AT command when sending it

Sequence	nstructions	Function	Default
1	AT+VERSION	Version number	JDY-31-V1.2
2	AT+RESET	Soft reset
3	AT+DISC	Disconnect (valid in connected state)
4	AT+LADDR	Query the MAC address of the module
5	AT+PIN	Connection password setting and query	1234
6	AT+BAUD	Baud rate setting and query	9600
7	AT+NAME	Broadcast Name Setting and Query	JDY-31-SPP
8	AT+DEFAULT	Restore factory settings

Compatibility and Performance Comparison

	JDY-30	JDY-31
Working current	19mA	7.3mA	JDY-31has obvious advantages
Transmission speed	8KByte	16KByte
Compatibility	Slow search,	Fast search and connection

JDY-30 will be discontinued and will be replaced by JDY-31 in the future

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