Chengdu Ebyte Electronic Technology Co.,Ltd.
E31-433T17D1B User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
15
pull-up resistor of the module.
Open-drain mode is more adaptable, and
in some cases an external pull-up resistor
may be required.
1
TXD
、
AUX push-pull output
，
RXD pull up input
0
TXD
、
AUX open-drain outputs
，
RXD open-drain
inputs
5
4
3
Wireless wake-up time
Both transmitter and receiver module
work in mode 0. The delay time is invalid
and can be any value.
The transmitter works in mode 1, and
will continue to transmit the call code for
the corresponding time.
The receiver works in mode 2, which
refers to the receiver's listening interval
(wireless wake-up) and can only receive
data from the module working in mode 1.
0
0
0
250ms
（
default
）
0
0
1
500ms
0
1
0
750ms
0
1
1
1000ms
1
0
0
1250ms
1
0
1
1500ms
1
1
0
1750ms
1
1
1
2000ms
2
FEC switch
After the FEC is turned off, the actual
data transmission rate is increased, but
the anti-interference ability is weakened
and the distance is slightly closer. Please
choose according to the actual
application.
Both sides of
the communication must be turned on or
off.
0
Turn off FEC
1
Open FEC
（
default
）
1
0
Transmitting power (Approximate value)
The external power supply must provide
more than 200mA current output
capability. And ensure that the power
supply ripple is less than 100mV.
It is not recommended to use smaller
power transmission because of its low
power utilization efficiency.
0
0
17dBm
（
default
）
0
1
14dBm
1
0
10dBm
1
1
7dBm
For example
（
The meaning of the No. 3 "SPED" byte
）：
The binary digit of the byte
7
6
5
4
3
2
1
0
Specific value
（
Users configure
）
0
0
0
1
1
0
1
0
Meaning
Serial parity bit
8N1
Serial port baud rate 9600
Air data rate 2.4k
Corresponding hexadecimal
1
A
8 Hardware design
It is recommended to use a DC regulated power supply to supply power to the module. The power supply ripple
factor should be as small as possible, and the module needs to be reliably grounded.
Please pay attention to the correct connection of the positive and negative poles of the power supply. If the reverse
connection is made, the module may be permanently damaged.
