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6.4 Power saving mode（Mode 2）
Type
Transmitting
Receiving
6.5 Sleep mode（Mode 3）
Type
Transmitting
Receiving
Configuration
Note
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
1
C0+Working parameters
2
3
C2+Working parameters
4
5
7.1 Factory default parameter
M odule M odel
Frequency
E31-433T17D
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd.
When M0 = 0，M1 = 1，the module works on Mode 2
The module is on sleep mode, serial port is close, so it cannot receive the serial port data of external M CU.
Thus, this module does not feature wireless transmitting function.
In mode 2, the transmitter must be work in M ode 1; M onitoring the wake-up code at regular time, once a
valid wake-up code is received, the module continue to receive and wait for the entire valid data packet t o
be received; Then AUX outputs low level, after delaying 5ms, the serial port is open and the received
wireless data will be transmitted via TXD, after that, AUX outputs high level; Wireless module continue
to enter "Sleep-M onitor"working mode(polling); Set different wake-up time, the module has different
receiving response time (max 2s) and different average power consumption(min 30uA); Users need to
strike a balance between communication latency and average power consumption.
When M0 = 1，M1 = 1，the module works on Mode 3
Transmitting the wireless data is unavailable.
Receiving the wireless data is unavailable.
Sleep mode can be used for module parameter setting. Use serial port 9600, 8N1 to set module working
parameters via specific command format.
When entering other modes from the sleep mode, the module will reconfigure the parameters. During the
configuration process, AUX keeps low level; after that, AUX outputs high level, so it is recommended that the
user detect the AUX rising edge.
The C0+5 byte working parameter is sent in hexadecimal format, 6 bytes in all, and must
be sent continuously (power-down save)
Three C1s are sent in hexadecimal format. The module returns the saved parameters and
C1+C1+C1
must be sent continuously.
Send C2+5 byte working parameters in hexadecimal format, 6 bytes in all, must be sent
continuously (power off without saving)
Three C3s are sent in hexadecimal format. The module returns version information and
C3+C3+C3
must be sent continuously.
Three C4s are sent in hexadecimal format, and the module will generate a reset and must
C4+C4+C4
be sent continuously.
Factory default parameter value：C0 00 00 18 50 44
Address
Channel
433M Hz
0x0000
0x50
Description
Air data rate
Baud Rate
1.2kbps
9600
E31-433T17D User Manual
Transmitting
Serial port format
power
8N1
50mW
11
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