Ebyte E90-DTU User Manual page 20

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Read /
05H REG2
write
Read /
06H REG3
write
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4 Software mode switching
0 Disable (default)
1 start using
3 2 continue to have
1 0 transmitting power
0 0 33 dBm (by default)
0 1 30d B m
1 0 27d B m
1 1 24d B m
Channel Control (CH)
0-80 represents a total of 81 channels (900 band
applicable)
7 Enable the RSSI bytes
0 Disable (default)
1 start using
6 transmission mode
0 Transparent transfer (by default)
1 Fixed-point transmission
5 Relay function
0 Disable Relay function (default)
1 Enable relay function
4 LBT enable
0 Disable (default)
1 start using
E90-DTU(900SL33) User Manual
from 00)
If we use our upper position computer
configuration parameters, we will actively
close the bit. If you do not want to use M0
M1 pins to switch working mode, you can
enable this function, use specific serial
instructions to switch mode.
Format: C0 C1 C2 C3 02 + working mode
Send C0 C1 C2 C3 02 00 to transmission
mode
The Send C0 C1 C2 C3 02 01 is switched to
the WOR mode
Send the C0 C1 C2 C3 02 02 to switch to the
configuration mode
Send the C0 C1 C2 C3 02 03 to switch to the
sleep mode
Return: C1 C2 C3 02 + working mode
Note: When this function is enabled, only
9600 baud rate is supported in WOR mode
and sleep mode.
Power and current
relationship, when the maximum power, the
power supply efficiency is the highest;
The current will not decrease in equal
proportion with the power decrease.
Actual frequency = 850.125 + CH * 1M
When enabled, the module receives wireless
data and the output through the serial port
TXD will follow an RSSI strength byte.
During the fixed-point transmission, the
module will identify the first three bytes of
the serial port data as: address high + address
low + channel, and take it as the wireless
transmission target.
After the relay function is enabled, if the
target address is not the module itself, the
module will start a forward;
To prevent data return, it is recommended to
work with fixed point mode; namely, target
address and source address are different.
After enabling, the wireless data will be
monitored before transmission, which can
avoid interference to a certain extent, but
may bring data delay;
The maximum residence time of LBT is 2
are nonlinear
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