Chengdu Ebyte Electronic Technology Co.,Ltd. E22-400T22D User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd. 4-15
When the data is smaller than the sub packet
length, the serial output of the receiving end is an
uninterrupted continuous output.
When the data is larger than the sub packet length,
the receiving end serial port will output the sub
packet.
RSSI Ambient noise enable
When enabled, the C0 C1 C2 C3 command can be
sent in the transmitting mode or WOR
transmitting mode to read the register.
Register 0x00: Current ambient noise RSSI
Register 0X01: RSII when the data was received
last time.
（
Current channel noise is: dBm =-RSSI/2
）
Command format: C0 C1 C2 C3 + starting
address + read length
Return: C1 + address + read length + read valid
value
E.g: send C0 C1 C2 C3 00 01
Return C1 00 01 RSSI(Address can only start
from 00)
Power and current are nonlinear, and power
efficiency is highest at maximum power.
The current does not decrease in proportion to the
decrease in power.
Channel control
（
CH
）
0-83 represents a total of 84 channels
Frequency= 410.125 + CH *1M
When enabled, the module receives wireless data
and it will follow an RSSI strength byte after
output via the serial port TXD.
During fixed-point transmission,the module
recognizes the first three bytes of the serial data
as: address high + address low + channel and
takes it as the wireless transmitting target.
Transparent transmission mode（default）
After the reply function is enabled, if the target
address is not the module itself, the module will
forward it once.
In order to prevent data return-back, it is
recommended to use it in conjunction with the
fixed point mode. That is: the target address is
different from the source address.
Disable repeater function
（
default
）
When enabled, wireless data will be monitored
before it is transmitted, which can avoid
interference to a certain extent, but may cause
data delay.
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