Chengdu Ebyte Electronic Technology Co.,Ltd.
E31-433T27D User Manual
Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
14
7. Command format
In sleep mode (mode 3: M0 = 1, M1 = 1), the list of supported commands are as follows (only 9600, 8N1 format is
supported when)
：
No.
Command format
Description
1
C0+Working parameters
The C0+5 byte working parameter is sent in hexadecimal format, 6 bytes in all, and
must be sent continuously (power-down save)
2
C1+C1+C1
Three C1s are sent in hexadecimal format. The module returns the saved parameters
and must be sent continuously.
3
C2+Working parameters
Send C2+5 byte working parameters in hexadecimal format, 6 bytes in all, must be
sent continuously (power off without saving)
4
C3+C3+C3
Three C3s are sent in hexadecimal format. The module returns version information and
must be sent continuously.
5
C4+C4+C4
Three C4s are sent in hexadecimal format, and the module will generate a reset and
must be sent continuously.
7.1 Factory default parameter
Model
Factory default parameter value
：
C0 00 00 18 50 44
Module Model
Frequency
Address
Channel
Air data rate
Baud Rate
Serial port format
Transmitting
power
E31-433T27D
433MHz
0x0000
0x50
1.2kbps
9600
8N1
500mW
7.2 Working parameter reading
Instruction format
Detailed description
C1+C1+C1
In sleep mode (M0=1, M1=1), a command (HEX format) is issued to the module serial port: C1
C1 C1, the module will return the current configuration parameters, such as: C0 00 00 1A 17
44.
7.3 Version number reading
Instruction format
Detailed description
C3+C3+C3
In sleep mode (M0=1, M1=1), a command (HEX format) is issued to the module serial port: C3
C3 C3, the module will return the current configuration parameters, such as: C3 32 xx yy;the
second byte represents the frequency , if it’s 32,it is the applicable frequency of 433MHz, if it’s
38, it is the applicable frequency of 470MHz, if it’s 45, it is the applicable frequency of
868MHz; If it’s 44, it is the applicable frequency of 915MHz; if it’s 46, it is the applicable
frequency of 170MHz; xx represents the version number, yy represents other features of
module.
