Multifunctional serial to Ethernet module user manual
www.usriot.com
Jinan USR IOT Technology Co., Ltd
Page34
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9
6.2.
6.2.
6.2.
6.2. Hardware
Hardware
Hardware
Hardware flow
flow
flow
flow control(RTS/CTS)
control(RTS/CTS)
control(RTS/CTS)
control(RTS/CTS)
If you want to use Hardware flow control, select it before using.
RS232 interface support hardware flowcontrol
（
RTS/CTS
）
Pin name
Description
IO type
Operater
RTS
Request to Send
O
module
CTS
Clear to Send
I
Outside device(PC)
Diagram 6-3 Pin description
When RTS = 0, enable the other side to send, at this time, TTL is 0 volt, RS232 is -3V ~
-15V.
When CTS = 0, represent module is enabled to send, at this time, TTL is 0 volt, and RS232 is
-3V ~ -15V.
When the logic is reverse, represent that disable the other side to send or was disabled the
module to send.
When connect with PC’s RS232 interface, we can use the serial cable(cross).
6.3.
6.3.
6.3.
6.3. MAC
MAC
MAC
MAC address
address
address
address
In Current config and status, can see the currently MAC address in use. Diagram below is
using the factory MAC.
Diagram 6-4 currently MAC in use
6.4.
6.4.
6.4.
6.4. Packet
Packet
Packet
Packet time
time
time
time and
and
and
and Packet
Packet
Packet
Packet length
length
length
length
If packet time is 10ms, packet length 512 byte. Then it represent this meaning:
