Ebyte E32-868T20D - Hardware Design

Chengdu Ebyte Electronic Technology Co,;Ltd E32-868T20D user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd. 14
3
SPED
7
6
UART parity bit
 UART mode can be different between
communication parties
0
0
8N1 (default)
0
1
8O1
1
0
8 E1
1
1
8N1 (equal to 00)
5
4
3
TTL UART baud rate（bps）
 UART baud rate can be different between
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
1200
0
0
1
2400
0
1
0
4800
0
1
1
9600 (default)
1
0
0
19200
1
0
1
38400
1
1
0
57600
1
1
1
115200
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
0.3k
0
0
1
1.2k
0
1
0
2.4k (default)
0
1
1
4.8k
1
0
0
9.6k
1
0
1
19.2k
1
1
0
19.2k (same to 101)
1
1
1
19.2k (same to 101)
General Specifications
Except for E32 (400T20S)
4
CHAN
7
6
5
reserved
Write 0
Communication channel
00H-1FH, correspond to 410~441MHz
4-0, channel (410M + CHAN*1M), default 17H（433MHz）
5
OPTIO
N
7
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.
0
Transparent transmission mode
1
Fixed transmission mode
6
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.
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
0
0
0
250ms (default)
0
0
1
500ms
0
1
0
750ms