Chengdu Ebyte Electronic Technology Co.,Ltd.
E31-433T17D1B User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
13
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
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
E31-433T17D1B
433MHz
0x0000
0x50
1.2kbps
9600
8N1
50mW
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.
7.4 Reset instruction
Instruction format
Detailed description
C4+C4+C4
In sleep mode (M0=1, M1=1), a command (HEX format) is issued to the module serial port::
C4 C4 C4, the module will generate a reset; during the reset process, the module performs
self-test, AUX output low level, After the completion of reset, the AUX outputs high and the
module starts to work normally. At this time, Users can switch modes or initiate the next
instruction.
