Chengdu Ebyte Electronic Technology Co.,Ltd.
E31-433T17D1B User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
14
7.5 Parameter setting instruction
0
Name
Description
Note
0
HEAD
Fixed 0xC0 or 0xC2, which indicates that this frame data is a
control command
Must be 0xC0 or C2
C0
：
The set parameters will be saved
after power down.
C2
：
The set parameters will not be saved
after power down.
。
1
ADDH
High byte of module address (default 00H)
00H-FFH
2
ADDL
Low byte of module address (default 00H)
00H-FFH
3
SPED
7
6
Serial parity bit
The serial port mode of the two
communication parties can be different
0
0
8N1
（
default
）
0
1
8O1
1
0
8 E1
1
1
8N1
（
equals to 00
）
5
4
3
TTL Serial port rate
（
bps
）
The baud rate of both parties can be
different.
The serial port baud rate has nothing to
do with the wireless transmission
parameters, and does not affect the
wireless transmission and reception
characteristics.
0
0
0
Serial port baud rate 1200
0
0
1
Serial port baud rate 2400
0
1
0
Serial port baud rate 4800
0
1
1
Serial port baud rate 9600
（
default
）
1
0
0
Serial port baud rate 19200
1
0
1
Serial port baud rate 38400
1
1
0
Serial port baud rate 57600
1
1
1
Serial port baud rate 115200
2
1
0
Wireless air data rate
（
bps
）
The lower the air speed, the longer the
distance, the stronger the
anti-interference performance and the
longer the transmission time.
The wireless transmission rates of both
communicating parties must be the same.
0
0
0
Air data rate 1.2k
（
default
）
0
0
1
Air data rate 2.4k
0
1
0
Air data rate 4.8k
0
1
1
Air data rate 9.6k
1
0
0
Air data rate 19.2k
1
0
1
Air data rate 38.4k
1
1
0
Air data rate 50k
1
1
1
Air data rate 70k
4
CHAN
7
6
5
Keep and unused
Write 0.
Communication channel
00H-FFH
，
correspond 425 ~ 450.5MHz
4-0
：
（
425M + CHAN * 0.1M), default 50H
（
433M
）
5
OPTION
7
Fixed point send enable bit
（
similar to MODBUS
）
When value is 1, the first 3 bytes of each
user data frame are used as the high and
low addresses and channels. When
transmitting, the module changes its own
address and channel, and when it is
finished, it restores the original settings.
0
Transparent transmission mode
1
Fixed point transmission mode
6
IO drive mode
（
default 1
）
This bit is used to enable the internal
