User's Manual

User Manual of HC-02 V1.1 Bluetooth Serial Port Communication Module Gathering information and Carrying Dreams
Website: http://www.hc01.com
Guangzhou Huicheng Information Technology Co., Ltd.
9
Sales hot line: 020-8408-3341
Address: Room 608, No.19, Jiangong Road, Tianhe Software Park, Tianhe District, Guangzhou City, Guangdong Province Technical customer service: 445253184
14
LEDCON
I
On - board LED lamp control pin, ground off LED lamp
15
KEY-
I, weak pull-up
AT Command Setting Foot ( Note ③ )
16
LED
O
Module operating status indicator output pin ( Note ① )
17
STATUS
O
Module connection status indication output pin ( Note ② )
18
KEY+
I, weak
pull-down
AT command setting pin ( Note ④ )
19
NC
Floating
NC
20
NC
Floating
NC
21
NC
Floating
NC
22
NC
Floating
NC
23
LED
O
Module working status indicator output pin ( note ① ⑤ )
24
STATUS
O
Module connection status indication output pin ( note ②⑤ )
25
NC
Floating
NC
26
KEY+
I, weak
pull-down
AT command setting pin ( note
④⑤
)
Note ①: Module working status indicator output pin, high level output, you shall connect resistors in series
when the module is connected to LED.
Before connecting, it lights for 100ms every 200ms seconds. After connecting, the LED lights always.
Note ②: In order to assist the user in determining whether the module is connected, this pin can output a level
signal to indicate.
This pin outputs a low level before the module is not connected. After the module is connected, the pin outputs
a high level.
Note ③: Input pin, pull up inside. In the connected state, this pin is set to a low level and can enter the AT
command setting mode. This pin is set high and returns to serial transmission mode.
Note ④: Input pin, pull down inside. In the connected state, this pin is set to a high level and can enter the AT
command setting mode. This pin is set low and returns to serial transmission mode.
Note ⑤: Pins 23 / 24 and 26 are pins added to the new hardware and can be compatible with pins of HC-05.
( The new version of hardware has a dot on the back of the module at the foot of 14. The old version of hardware
does not have this dot.)