Chengdu Ebyte Electronic Technology Co., Ltd.
E22-400T30S_User Manual _EN
Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
16
The higher the air rate, the smaller the delay and the
shorter the transmission distance.
0
0
1
air speed 1.2k
0
1
0
air speed 2.4k(default)
0
1
1
air speed 4.8k
1
0
0
air speed 9.6k
1
0
1
air speed 19.2k
1
1
0
air speed 38.4k
1
1
1
air speed 62.5k
04H
read/write
REG1
7
6
subcontract settings
The data sent by the user is less than the sub-packet
length, and the serial port output of the receiving end
presents an uninterrupted continuous output;
If the data sent by the user is larger than the length of
the packet, the serial port at the receiving end will
output the packet.
0
0
240 bytes (default)
0
1
128 bytes
1
0
64 bytes
1
1
32 bytes
5
RSSI ambient noise enable
After enabling, the command C0 C1 C2 C3 can be
sent in the transmission mode or WOR transmission
mode to read the register;
Register 0x00: current ambient noise RSSI;
Register 0X01: RSSI when receiving data last time
(the current channel noise is: dBm = -(256 -
RSSI));Instruction format: C0 C1 C2 C3+start
read length;
Return: C1 + a read read valid
value; for example: send C0 C1 C2 C3 00 01
Return C1 00 01 RSSI
(the address can only start
from 00)
0
disabled (default)
1
enable
4
3
2
reserve
1
0
transmit power
The relationship between power and current is
non-linear, and the power supply efficiency is the
highest at maximum power;
Current does not decrease proportionally with power
reduction.
0
0
30dBm (default)
0
1
27dBm
1
0
24dBm
1
1
21dBm
05H
read/write
REG2
Channel Control (CH)
0-83 represent a total of 84 channels
Actual frequency = 410.125 + CH *1M
06H
read/write
REG3
7
Enable RSSI byte
When enabled, the module receives wireless data
and outputs it through the serial port TXD, followed
by an RSSI strength byte.
0
disabled (default)
1
enable
6
transfer method
During fixed-point transmission, the module will
recognize the first three bytes of serial port data as:
address high + address low + channel, and use it as
the wireless transmission target.
0
transparent transmission (default)
1
Fixed-point transmission
5
relay function
After the relay function is enabled, if the target
address is not the module itself, the module will start
a forwarding;
In order to prevent data return, it is recommended to
use it in conjunction with the fixed-point mode; that
is, the destination address is different from the
source address.
0
Disable relay function (default)
1
Enable relay function
4
LBT enable
After enabled, wireless data will be monitored before
transmission, which can avoid interference to a
certain extent, but may cause data delay;
The maximum stay time of LBT is 2 seconds, and it
will be issued forcibly when it reaches 2 seconds.
0
disabled (default)
1
enable
