Chengdu Ebyte Electronic Technology Co.,Ltd.
E104-BT40 User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
4-15
When E104-BT40 module is in SPP mode, serial port can receive and process a maximum of 249 bytes of data
packets at a time. The data packet sent by the mobile device to the module, please send it by sub-packaging (1-121 bytes
/ packet).
Packing interval description:
BLE inserts 20ms every 20 bytes
spp insert 20ms every 100 bytes
6. AT Command
6.1 Default parameters
Baud rate
115200
Flow Control
Off
Any baud rate setting of serial port
Off
SPP name
CDEBYTE_SPP
BLE name
CDEBYTE_BLE
Pairing code
1234
Pairing mode
1
（
no input output
）
Two-way output IO
Low level
Two-way PWM
Off
Enable MAC binding
Off
Bind MAC
FF FF FF FF FF FF
Status printing
Off
Air configuration password
123456
16-bit Service uuid
FFF0
①
16-bit Slave channel uuid
FFF1
16-bit Master channel uuid
FFF2
1
:128-bit UUID is 00 00
xx xx
00 00 10 00 80 00 00 80 5f 9b 34 fb
xx xx is 16-bit UUID.
6.2 Command description
All AT commands do not need to return (\ r), line feed (\ n)
The return result of AT command ends with \ r \ n (except for returning HEX). The response in the instruction table in
Section 6.3 ends with \ r \ n.
Command error response ERR = [NUM]. (NUM is ASCII)
