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Chengdu Ebyte Electronic Technology Co.,Ltd.
num
ber
Fixed 0xC0 or 0xC2, indicating that this frame data is a
0
HEAD
control command
1
ADDH
Module address high byte (default 00H)
2
ADDL
Module address low byte (default 00H)
Rate parameters, including serial rate and air rate
7, 6: serial port check digit
-------------------------------------------------
5, 4, 3 TTL serial port rate (bps)
(default)
3
SPED
-------------------------------------------------
2, 1, 0 Wireless air rate (bps)
7, 6, 5, 4, 3, 2, 1, 0 Communication channel
4
CHAN
Communication frequency (410M + CHAN * 0.5M)
(default 0x2E: 433M)
7. Fixed-point transmission enable bit (like MODBUS)
-------------------------------------------------
6, 5, 4, 3, 2 Reserved bits, write 0
5
OPTION
-------------------------------------------------
1, 0 transmit power (approximate)
For example (the meaning of the serial number 3 "SPED" byte):
the binary bit of the
byte
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00: 8N1 (default)
01: 8O1
10:8E1
11: 8N1
000: The serial port baud rate is 1200
001: The serial port baud rate is 2400
010: The serial port baud rate is 4800
011: The serial port baud rate is 9600
100: The serial port baud rate is 19200
101: The serial port baud rate is 38400
110: The serial port baud rate is 57600
111: The serial port baud rate is 115200
000: air rate is 1.2k
001: Air rate is 2.4k (default)
010: Air rate is 4.8k
011: Air rate is 9.6k
100: 19.2k air rate
101: Air rate is 50k
110: Air rate is 100k
111: Air rate is 200k
0: Transparent transmission mode (default)
1: Fixed point transmission mode
00: 20 dBm (default)
01: 17dBm
10: 14dBm
11: 10dBm
7
6
5
E49-400T30D Specifications
Must be 0xC0 or C2
C0: The set parameters will be
saved after power off.
C2: The set parameters will not be
saved after power off.
00H-FFH
00H-FFH
----------------------------------------
The baud rate of both
communication parties can be
different
The serial port baud rate has
nothing to do with wireless
transmission parameters, and does
not affect the wireless transceiver
characteristics.
----------------------------------------
----------------------------------------
The lower the air rate, the longer
the distance, the stronger the
anti-interference performance and
the longer the sending time.
The air wireless transmission
rate of both parties must be the
same.
----------------------------------------
00H-C8H,
Corresponding to 410~510 MHz
When it is 1, the first 3 bytes of
each user data frame are used as
channel, high and low addresses.
Change its own address and
channel when transmitting, and
restore the original settings after
completion.
----------------------------------------
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The external power supply must
provide a current output capability
of more than 100mA. And ensure
that the power supply ripple is less
than 100mV.
It is not recommended to use
low power transmission, and its
power utilization efficiency is not
high.
4
3
2
1
0
14
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