User's Manual
Chengdu Ebyte Electronic Technology Co., Ltd E104-BT05 User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd
8
13
DP
-
-
USB data Positive
14
VDD
-
Positive power
supply
Positive power supply
15
GND
-
Power ground
Power ground
16
MOD
Input
Mode selection
Configuration mode selection pin
17
DISC
/
/
/
18
PWM0
Output
PWM output
Output PWM wave according to AT command
19
TXD
Output
Serial port output
Serial port output
20
RXD
Input
Serial port input
Serial port input
21
IO0
Input
Level read
IO0 Level read
22
IO1
Input
Level read
IO1 Level read
4. Operation modes
4.1 Low Power Mode
Low-power mode: The module enters the low-power mode at once by AT command “AT+SLEEP”, or enter the
low-power mode after disconnecting the “AT+DISCSLEEP=1”setting, the serial port output “STA：sleep”when the
command enters the low-power mode at once, if the broadcast function module is not turned off, the broadcast gap as the
wake-up time will broadcast. See 6.37 Get to sleep mode at once
Description：
1. If broadcasting is turned on in low power mode, the host can scan the broadcast and establish a connection with the
module, and the module wakes up at once after the connection is established.
2. The module enter low-power mode to support serial data wake-up (the first frame data will be lost as wake-up
source data).
4.2 Wake-Up mode
WKP pin: When the module enters the low power mode, the user can pull down the wake-up via WKP pin.
Serial port wake-up: When the module enters the low-power mode, any data received by the serial port will wake up
the module. The frame data module does not operate on it. At this time, the serial port outputs "STA: wakeup".
In wake-up mode, the module can broadcast, can enter configuration mode, can be scanned and connected. If the
main device is connected to the module, the serial port output "STA: connect", the module can transmit data transparently,
after the device is disconnected, the serial port output "STA: disconnect".
4.3 Configuration mode
Configuration mode: AT command can be operated by default when the module is powered on (See 6. Instruction
operation ). If the MOD pin is pulled down in connection state, the module will also enter the configuration mode.
Description: Bluetooth communication is interrupted in configuration mode, data cannot be sent or received.