Ebyte E49-900T20S User Manual page 17

Chengdu Ebyte Electronic Technology Co., Ltd
Fix 0xC0 or 0xC2, it means this frame data is control
command
0 HEAD
High address byte of module
1 ADDH （the default 00H）
Low address byte of module
2 ADDL
（the default 00H）
Rate parameters, including serial rate and air rate
7, 6: Serial parity bit
00: 8N1 (default)
01: 8O1
10: 8E1
11: 8N1
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5，4，3
3 SPED
-------------------------------------------------
2，1，0 Wireless air rate (bps)
4 CHAN
7,，6，5，4，3，2，1，0 Communication channel
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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
000: The air rate is 1.2k
001: The air speed is 2.4k (default)
010: The air speed is 4.8k
011: The air speed is 9.6k
100: The air speed is 19.2k
101: The air speed is 50k
110: The air speed is 100k
111: 200k air speed
E49-900T20S User Manual
Must be 0xC0 or 0xC2

C0: Save the parameters when power-down
C2: Do not save the parameters when
power-down
00H-FFH
00H-FFH
---------------------------------------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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better
and
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