User's Manual

4
CHAN
Communication channel
4-0, channel (862M + CHAN*1M), default 06H（868MHz）
00H-45H, correspond to 862~931MHz
7
0
Fixed transmission enabling bit（similar to MODBUS）

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.
Transparent transmission mode
1
Fixed transmission mode
OPTI
ON
5
6
1
IO drive mode (default 1)

This bit is used to the module internal
pull-up resistor. It also increases the
level’s adaptability in case of open drain.
But in some cases, it may need external
pull-up resistor.
TXD and AUX push-pull outputs, RXD pull-up inputs
TXD、AUX open-collector outputs, RXD open-collector
0
inputs
Shanghai Smart Control Co., Ltd.
16
Low address byte of module
ADDL
（the default 00H）
00H-FFH
2
7
0
0
1
1
5
0
0
0
0
1
1
1
1
2
0
0
0
0
1
1
1
1
6
0
1
0
1
4
0
0
1
1
0
0
1
1
1
0
0
1
1
0
0
1
1
UART parity bit
8N1 (default)

UART mode can be different between
communication parties
8O1
8 E1
8N1 (equal to 00)
3
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
TTL UART baud rate（bps）
1200
2400


UART baud rate can be different between
communication parties
4800
The UART baud rate has nothing to do
with wireless transmission parameters &
won’t affect the wireless transmit / receive
features.
9600 (default)
19200
3
38400
SPED
57600
115200
Air data rate（bps）
0.3k


The lower the air data rate, the longer the
1.2k
transmitting
distance,
better
2.4k (default)
4.8k
anti-interference performance and longer
transmitting time
9.6k
The air data rate must keep the same for
both communication parties.
19.2k
19.2k (same to 101)
19.2k (same to 101)
General Specifications
7
6
5
reserved
Write 0