Chengdu Ebyte Electronic Technology Co., Ltd.
Copyright ©2012–2020
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Chengdu Ebyte Electronic Technology Co., Ltd
8
5 Operation mode
No.
Operation
mode
Function Description
1
Low power
consumptio
n
The module enters low power mode after it powers on and the module keeps in advertising
state. The serial port stops receiving any data while transparent output function of Bluetooth
will not be affected, which means serial output function is still valid in this mode, data
received by Bluetooth can output via serial ports.
2
Transparent
transmissio
n
In the low power consumption mode, the module enters the state of serial port receiving by
pulling down DIO_6 pin. When the Bluetooth is not connected, it keeps in command reception
status; When the Bluetooth is connected, it’s in transparent transmission mode, the data sent by
the serial port to the Bluetooth module can be sent out via Bluetooth. By inputting character
“+++”, the module enters the instruction configuration mode and displays “CMD IN”,
meaning to enter the command mode; Inputting the character “+++” again, the module returns
to command input mode and displays “CMD OUT”.
3
Sleep
By giving the DIO_5 pin a low level of at least 300ms, the module goes into sleep mode and
again triggers the pin, the module returns to low power mode.
5.1 Multiple roles
This module can be configured as a multi-role mode through the instruction AT+ROLE=1. In this mode, each module
can act as master or slave, one device supports three connections, as shown in figure 1.
Figure 1
It refers to one master- multi slaves. device 1 can connect device 2, device 3 and device 4 at the same time. The data
sent by device 1 can be received by other three devices simultaneously.
