Configuration Instructions On Computer - Ebyte E90-DTU User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.
When the airspeed is 1M, the channel calculation formula is: 2400 +
CHAN * 3MHz;
When the airspeed is 2M, the channel calculation formula is: 2400 +
CHAN * 5MHz;
Continuous transmission mode:
When the baud rate is 1200, 9600, 19200, the channel calculation formula
is: 2400+CHAN*2MHz;
When the baud rate is 4800, 57600, 115200, the channel calculation
formula is: 2400+CHAN*4MHz;
When the baud rate is 460800, 921600, the channel calculation formula is:
2400+CHAN*5MHz;
7
0
1
6
5
4
0
1
3
5 OPTION
0
1
2
1
0
1
0
0
1
1
Binary bits of the byte
Specific value (user
configuration)
Representative meaning
Corresponding hexadecimal

7.4 Configuration instructions on computer

The following figure shows the E90-DTU configuration interface on computer, users can switch to the command mode
Chengdu Ebyte Electronic Technology Co., Ltd.
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Fixed-point transmission enable bit (like ModBus)
Transparent transmission mode
Fixed-point transmission mode
Test mode device type (reserved)
Slave (default)
LBT switch
Turn off LBT (default)
Open LBT
IO drive mode
TXD, AUX push-pull output, RXD pull-up input (default)
TXD, AUX open circuit output, RXD open circuit input
0 Transmitting power (approximate value)
0 27dBm (default)
1
0
1
For example (the meaning of serial number 3 "SPED" byte):
7
0
Serial parity bit 8N1
0
N/A
N/A
Host
23dBm
20dBm
17dBm
6 5 4
0 0 1
The serial port baud rate is 9600
E90-DTU（2G4L27）User Manual
When it is 1, the first 3 bytes of each user
data frame are used as high and low
addresses and channels. The module
changes its address and channel during
transmission, and restores the original
settings after completion; the continuous
transmission mode is transparent
transmission.
The slave address in the ranging mode is
confirmed by ADDH and ADDL.
After turning on LBT, the current channel
quality will be checked before sending
each packet of data. If it is good, send it
directly. If there is interference in the
channel, wait for the interference to
disappear before sending.
Support for air speeds below 115200,
which may affect the continuous
transmission function after opening.
This bit is used to enable the internal
pull-up resistor of the module; the
open-drain mode has stronger level
adaptability. In some cases, an external
pull-up resistor may be required.
The external power supply must provide a
current output capability of more than
100mA and ensure that the power supply
ripple is less than 100mV.
It is not recommended to use lower power
transmission, and its power utilization
efficiency is not high.
3 2 1
0 0 1
Air rate 10kbps
13
0
1
18