Ebyte E49-900T20S User Manual page 18

Chengdu Ebyte Electronic Technology Co., Ltd
Communication frequency（850M + CHAN * 0.5M）
(Default 0x24: 868M)
7;
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6，5，4，3，2 Reserved bit, write 0
5 OPTION
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1, 0 Transmission power (approximation)
For example: The meaning of No.3 "SPED" byte:
The binary bit of the
byte
Configures by user
Meaning
Corresponding
hexadecimal
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Fixed transmission enabling bit（similar to MODBUS）
0： Transparent transmission mode
1： Fixed transmission mode
00: 20 dBm (default)
01: 17 dBm
10: 14 dBm
11: 10 dBm
7 6
0 0
UART parity bit 8N1
1



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ability of current output more than 100mA
and ensure the power supply ripple within
100mV.
recommended due to its low power supply
efficiency.。
5 4 3
0 1 1
UART baud rate is 9600
E49-900T20S User Manual
00H-A0H，
correspond to 850~930 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.
The external power must make sure the
Low power transmission is not
2 1
0 0
Air data rate is 2.4k
9
0
1
17