Parameter Setting Command - Ebyte E49-400T20D User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd.

7.4 Parameter setting command

No. Item
Fixed 0xC0 or 0xC2, it means this frame data is control
0 HEAD
command
1 ADDH High address byte of module（default 00H）
2 ADDL Low address byte of module (default 0H）
Rate parameters, including serial rate and air rate
7，6：
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5，4，3
3 SPED
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2，1，0
7,，6，5，4，3，2，1，0 Communication channel
Communication frequency （410M + CHAN * 0.5M）
4 CHAN
（Default 0x2E: 433M）
7，
MODBUS）
5 OPTION
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6，5，4，3，2 Reserved bit, write 0
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1, 0
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Description
Serial parity bit
00：8N1(default)
01：8O1
10：8E1
11：8N1
TTL serial speed (bps)
000: Serial baud rate is 1200
001: The serial port baud rate is 2400
010: The serial port baud rate is 4800
011: Serial baud rate is 9600 (default)
100: The serial port baud rate is 19200
101: Serial baud rate is 38400
110: Serial baud rate is 57600
111: Serial baud rate is 115200
Wireless air data rate （bps）
000：Air data rate is 1.2k
001：Air data rate is 2.4k（default）
010：Air data rate is 4.8k
011：Air data rate is 9.6k
100：Air data rate is 19.2k
101：Air data rate is 50k
110：Air data rate is 100k
111：Air data rate is 200k
Fixed transmission enabling bit（similar to
0： Transparent transmission mode
1： Fixed transmission mode
Transmission power (approximation)
E49-400T20D User Manual
Remark
Must be 0xC0 or 0xC2

C0: Save the parameters when power off
C2: Do not save the parameters when power
off
00H-FFH
00H-FFH
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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.
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The lower the air data rate, the longer

the transmitting distance,
anti-interference performance
longer transmitting time
The air data rate must keep the same

for both communication parties.
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00H-C8H，

correspond to 410~510 MHz

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.
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better
and
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