Chengdu Ebyte Electronic Technology Co.,Ltd. E31-433T17D User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
11
6.4 Power saving mode
（
Mode 2
）
Type
When M0 = 0
，
M1 = 1
，
the module works on Mode 2
Transmitting
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.
Receiving
In mode 2, the transmitter must be work in Mode 1; Monitoring 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-Monitor”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.
6.5 Sleep mode
（
Mode 3
）
Type
When M0 = 1
，
M1 = 1
，
the module works on Mode 3
Transmitting
Transmitting the wireless data is unavailable.
Receiving
Receiving the wireless data is unavailable.
Configuration
Sleep mode can be used for module parameter setting. Use serial port 9600, 8N1 to set module working
parameters via specific command format.
Note
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.
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
E31-433T17D
433MHz
0x0000
0x50
1.2kbps
9600
8N1
50mW