Hardware Design - Ebyte E30-490T20S User Manual

Chengdu Ebyte Electronic Technology Co,;Ltd
5
0
0
0
0
1
1
1
1
2
0
1
1
1
0
0
0
1
For example: The meaning of No.3 "S PED" byte:
The binary bit of the byte
Configures by user
M eaning
Corresponding hexadecimal

8. Hardware design

 It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible, and
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inputs
wireless wake-up time
4 3
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
FEC switch
Turn off FEC
Turn on FEC (default)
Transmission power (approximation)
0
Transmission power (approximation)
0
20dBm(default)
0
0
1
0
7 6
0 0
UART parity bit 8N1
250ms (default)
500ms
750ms
1000ms
1250ms
1500ms
1750ms
2000ms
17dBm
14dBm
10dBm
5 4
0 1
UART baud rate is 9600
1
E30 -490T20S user manual
some cases, it may need external pull-up
resistor.
 The transmit & receive module work in mode
0, whose delay time is invalid & can be
arbitrary value.
 The transmitter works in mode 1 can transmit
the preamble code of the corresponding time
continuously.
 When the receiver works in mode 2, the time
means the monitor interval time (wireless
wake-up). Only the data from transmitter that
works in mode 1 can be received.
 After turn off FEC, the actual
transmission rate increases
interference ability decreases. Also the
transmission distance is relatively short.
 Both communication parties must keep on
the same pages about turn-on or turn-off
FEC.
The external power must make sure the ability
of current output more than 400mA and ensure the
power supply ripple within 100mV .
Low power transmission is not recommended
due to its low power supply efficiency.
3 2 1
1 0 1
Air data rate is 2.4k
A
data
while anti-
0
0
15