Chengdu
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
18
110: Serial baud rate is 57600
111: Serial baud rate is 115200
-------------------------------------------------
2
，
1
，
0 Wireless air rate (bps)
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
----------------------------------------
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.
4
CHAN
7,
，
6
，
5
，
4
，
3
，
2
，
1
，
0 Communication channel
Communication frequency (410M + CHAN * 0.5M)
(Default 0x2E: 433M)
----------------------------------------
00H-C8H
，
correspond to410~510 MHz
5
OPTION
7;
Fixed transmission enabling bit
（
similar to MODBUS
）
0
：
Transparent transmission mode
1
：
Fixed transmission mode
-------------------------------------------------
6
，
5
，
4
，
3
，
2 Reserved bit, write 0
-------------------------------------------------
1, 0 Transmission power (approximation)
00: 20 dBm (default)
01: 17 dBm
10: 14 dBm
11: 10 dBm
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
ability of current output more than 1A and
ensure the power supply ripple within
100mV.
Low power transmission is not
recommended due to its low power supply
efficiency.
。
For example: The meaning of No.3 "SPED" byte:
The binary bit of the
byte
7
6
5
4
3
2
1
0
Configures by user
0
0
0
1
1
0
0
1
Meaning
UART parity bit 8N1
UART baud rate is 9600
Air data rate is 2.4k
Corresponding
hexadecimal
1
9
