Ebyte E22-230T30D User Manual page 18

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Write/
05H REG2
read
Write/
06H REG3
read
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17
1 0 64 bytes
1 1 32bytes
5 RSSI Ambient Noise Enable
0 disabled (default)
1 Enable
4 3 2 Reserve
1 0 transmit power
0 0 30dBm（default）
0 1 27dBm
1 0 24dBm
1 1 21dBm
Channel Control（CH）
0-64respectively represent a total of 65
channels
7 Enable RSSI bytes
0 disabled (default)
1 Enable
6 transfer method
0 transparent transmission (default)
1 fixed point transmission
5 Relay function
0 Disable relay function (default)
1 Enable relay function
4 LBT Enable
0 disabled (default)
E22-230T30D User Manual
If the data sent by the user is larger than
the packet length, the serial port of the
receiving end will be output in packets.
Enable command (packet setting, transmit
power as default parameters, configuration
mode): C0 04 01 20;
After it is enabled, the C0 C1 C2 C3
instruction can be sent in the transmission
mode or the WOR transmission mode to read the
register;
Register 0x00: Current ambient noise RSSI;
Register 0X01: RSSI when data was last
received
(Current channel noise is: dBm = -(256 -
RSSI));
Instruction format: C0 C1 C2 C3+start
address+read length;
Return: C1 + address + read length + read
valid value; such as: send C0 C1 C2 C3 00 01
Return C1 00 01 RSSI (address can only start
from 00)
Power and current have a non-linear
relationship, and the power supply
efficiency is the highest at the maximum
power;
The current does not decrease
proportionally as the power decreases.
Actual frequency = 220.125 + CH * 0.25M
When enabled, the module receives wireless
data and outputs it through the serial port
TXD, followed by an RSSI strength byte.
For fixed-point transmission, the module
identifies the money three bytes of the
serial data as: address high + address low
+ channel, and uses them as the wireless
transmitting target.
(a) When the relay function is enabled, the
module will initiate a forwarding if the
destination address is not the module
itself;
To prevent data backhaul, it is recommended
to use with fixed-point mode; i.e., the
destination address and the source address
are different.
After enabling, the wireless data will be
monitored before transmission, which can