Ebyte E30-490T20S User Manual page 15

Chengdu Ebyte Electronic Technology Co,;Ltd
Low address byte of module
2 ADDL
（the default 00H）
7
0
0
1
1
5
0
0
0
0
1
3 SPED 1
1
1
2
0
0
0
0
1
1
1
1
7
4 CHAN
4 ~ 0, channel (475M + CHAN * 0.1M ) , default 96H (490M Hz)
7
0
1
OPTIO
5
N
6
1
0
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UART parity bit
6
0
1
0
1
TTL UART baud rate（bps）
4 3
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
1 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
6 5
Communication channel
Fixed transmission enabling bit（similar to M ODBUS）
Transparent transmission mode
Fixed transmission mode
IO drive mode (default 1)
TXD and AUX push-pull outputs, RXD pull-up inputs
TXD、AUX open-collector outputs, RXD open-collector
8N1 (default)
8O1
8 E1
8N1 (equal to 00)
1200
2400
4800
9600 (default)
19200
38400
57600
115200
Air data rate（bps）
1k
2k
5k (default)
8k
10k
15k
20k
25k
reserved
E30 -490T20S user manual
00H-FFH
 UART mode can be different between
communication parties
 UART baud rate can be different between
communication parties
 The UART baud rate has nothing to do with
wireless transmission parameters & won't
affect the wireless transmit / receive features.
 The lower the air data rate, the longer the
transmitting distance, better anti-interference
performance and longer transmitting time
 The air data rate must keep the same for both
communication parties.
Write 0
00H-FFH, correspond to 475 ~ 500.5M Hz
 In fixed transmission mode, the first three
bytes of each user's data frame can be used as
high/low address and channel. The module
changes its address and channel when
transmit. And it will revert to original setting
after complete the process.
 This bit is used to the module internal pull-up
resistor. It also increases
adaptability in case of open drain. But in
the level's
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