Ebyte E30-TTL-100, Руководство пользователя

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SI4438 Wireless Module User Manual of E30 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 14 / 17
communication parties

The UART baud rate has nothing to do
with wireless transmission parameters &
won’t affect the wireless transmit /
receive features.
0 0 0 1200bps
0 0 1 2400bps
0 1 0 4800bps
0 1 1 9600bps（default）
1 0 0 19200bps
1 0 1 38400bps
1 1 0 57600bps
1 1 1 115200bps
2 1 0 Air data rate（bps）

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.
0 0 0 1kbps
0 0 1 2kbps
0 1 0 5kbps（Default）
0 1 1 8kbps
1 0 0 10kbps
1 0 1 15kbps
1 1 0 20kbps
1 1 1 25kbps
4 CHAN
7 6 5 N/A

0
Communication channel

00H-FFH，for 425 ~ 450.5MHz Communication frequency（425M+CHAN * 0.1M）
default 50H（433MHz）
5 OPTION
7 Fixed transmission（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.
0 Transparent transmission mode（default）
1 Fixed transmission mode
6 IO drive mode(the 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.
1 TXD and AUX push-pull outputs, RXD pull-up inputs
0 TXD、AUX open-collector outputs, RXD open-collector inputs
5 4 3 wireless wake-up time

The transmit & receive module work in
mode 0, whose delay time is invalid & can
be arbitrary value.

The transmitter works in mode 1 can
transmit the preamble code of the
corresponding time continuously.

When the receiver works in mode 2, the
time means the monitor interval time
(wireless wake-up). Only the data from
transmitter that works in mode 1 can be
received.
0 0 0 250ms（default）
0 0 1 500ms
0 1 0 750ms
0 1 1 1000ms
1 0 0 1250ms
1 0 1 1500ms
1 1 0 1750ms
1 1 1 2000ms
2 FEC switch

After turn off FEC, the actual data