SI4438 Wireless Module
User Manual of E30 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd.
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transmission
rate
increases
while
anti-interference ability decreases. Also
the transmission distance is relatively
short.
Both communication parties must keep
on the same pages about turn-on or
turn-off FEC.
0
Turn off FEC
1
Turn on FEC（Default）
1
0
transmission power (approximation)
The external power must make sure the
ability of current output more than
250mA and ensure the power supply
ripple within 100mV.
Low
power
transmission
is
not
recommended due to its low power
supply efficiency.
0
0
20dBm（Default）
0
1
17dBm
1
0
14dBm
1
1
10dBm
For example: The meaning of No.3 "SPED" byte
The binary bit of the byte
7
6
5
4
3
2
1
0
The specific value
( configured by user)
0
0
0
1
1
0
1
0
Meaning
UART parity bit 8N1
UART baud rate is 9600
Air data rate is 2.4k
Corresponding hexadecimal
1
A
8. Parameter Setting
When the module is in mode 3 (M1=1 M0=1), the parameter can be set by instruction or software in PC.
Please visit www.cdebyte.com to download the software.
