USR IOT USR-K1 User manual

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USR-K1 Super Port
File version: V1.0.3
USR-K1 is the high performance-cost version of Super Port .It is an embedded serial networking module,
whose function is to realize bidirectional transparent transmission between UART TTL and Ethernet .The
amazing part of K1 lies in its Ethernet port integration design .You can apply K1 to your products to realize
networking communication .User can directly process data interaction through network and device to realize
remote data acquisition, remote control and management.
K1 is based on the design concept of "Simple,Reliable,Affordable" .And it has the same kernel solution and
parameters as USR-TCP232-T.

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Content
USR-K1 Super Port .............................................................................................................................. 1
1．Product Introduction ...................................................................................................................... 3
1.1 Brief Intro............................................................................................................................... 3
1.2 Function Features................................................................................................................... 3
1.3 Product Characteristics ........................................................................................................... 3
1.4 Order Symbol......................................................................................................................... 4
1.5 Electrical Characteristics ......................................................................................................... 4
2. Default Parameter Test .................................................................................................................... 5
2.1 Hardware Connection ............................................................................................................. 5
2.2 Set-up Software...................................................................................................................... 6
2.3 Communication Test ............................................................................................................... 7
2.4 Parameter Setting................................................................................................................... 8
2.4.1 Set via Net.................................................................................................................... 8
2.4.2 Set via COM. ................................................................................................................. 8
2.4.3 Set DIY......................................................................................................................... 9
3. Module Work Mode ....................................................................................................................... 10
3.1 Structure Chart..................................................................................................................... 10
3.2 UDP Mode........................................................................................................................... 10
3.3 TCP Client........................................................................................................................... 11
3.4 UDP Server Mode................................................................................................................. 12
3.5 TCP Server Mode................................................................................................................. 13
3.6 Virtual COM Mode................................................................................................................ 13
4. Hardware Description .................................................................................................................... 15
4.1 Technical Specifications......................................................................................................... 15
4.2 Hardware Description............................................................................................................ 16
4.3 Hardware to RJ45 Light......................................................................................................... 17
4.4 Size .................................................................................................................................... 18
5. Expand Functions.......................................................................................................................... 19
5.1 RS485................................................................................................................................. 19
5.2 Link..................................................................................................................................... 20
5.3 Reset .................................................................................................................................. 20
5.4 ID........................................................................................................................................ 20
5.5 Index................................................................................................................................... 22
5.6 RFC2217............................................................................................................................. 23
6. Common Questions ....................................................................................................................... 26
6.1 Work Across Network Segment.............................................................................................. 26
6.2 More Network Cards............................................................................................................. 26
6.3 Every Period of Time, Module Dropped................................................................................... 26
6.4 Search Device Failure, Port Occupied..................................................................................... 27
7. Revison history ............................................................................................................................. 28
8. Contact Us ................................................................................................................................... 29

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1．Product Introduction
1.1 Brief Intro
USR-K1 is the high performance-cost version of Super Port. It is an embedded serial networking module,
whose function is to realize bidirectional transparent transmission between TTL and Ethernet. The amazing
part of K1 lies in its Ethernet port integration design .You can apply K1 to your products to realize networking
communication .User can directly process data interaction through network and device to realize remote data
acquisition, remote control and management.
K1 is based on the design concept of "Simple,Reliable,Affordable". And it has the same kernel solution and
parameters as USR-TCP232-T.
1.2 Function Features
10/100M auto detect interface;
SupportAUTO MDI/MDIX, Can use a crossover cable or parallel cable connection;
Serial com port bound rate can set up from 300 to 961200,and None,Odd,Even,Mark,Space five check
bits;
Work mode TCP Server, TCP Client, UDP, UDP Server;
Working model related parameters can be set via a serial port or network;
3.3 V TTL level compatible;
Small Size
Virtual serial port supported;
Unique heartbeat package mechanism to ensure that the connection is reliable, put an end to connect
feign death;
Under UDP mode, Packet Broadcast is prohibited, with stronger anti-interference ability;
Across the gateway, across switches, routers;
Can work in LAN, also can work on the Internet (external network);
1.3 Product Characteristics
32 bitsARM CPU inside;
LAN : 10/100Mbps; protect: Built-2KV isolated electromagnetic;
Serial port baud rate: from 2400 to 961.2 KBPS can be set up;
Network protocol: ETHERNETARP IP UDP TCP ICMP;
Software tool: configuration software, TCP/UDP test soft, RS232 debug soft;
Configuration method: serial com port or via Ethernet, free software available;
Operating temperature: -25~75°C;

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Storage environment: -40~85°C, 5~95%RH.
Compact type
1.4 Order Symbol
name
symbol
Description Remarks
Super Port
USR-K1
Diagram 0-1 order symbol
1.5 Electrical Characteristics
Model number
Power supply DC
current
USR-K1
3.3V
185mA(165-195)
Diagram 0-2 Electrical Characteristics

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2. Default Parameter Test
Pls connect the product with your computer or router to test its performance.
FAQ: http://www.usriot.com/Search/getList/keyword/t24/
2.1 Hardware Connection
1.You can using”USR-TCP232-EVB”. It's easier to test. USR-TCP232-EVB is power for DC 5V@200mA.
Diagram 2-1 USR-K1 Connection diagram
3.If you don’t have “USR-TCP232-EVB”,please refer to 5.4

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2.2 Set-up Software
Set-up Software with link http://www.usriot.com/Download/237.html as can help to
view default setting then set the parameter.
1. Search in LAN (Firstly, ensure the computer IP is static. The module IP is 192.168.0.201by default; Disable
firewall, antivirus soft and WIFI).
Diagram 2-2 the default parameters
2.Keep default parameter set up your pc.

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Diagram 2-3 pc parameter
2.3 Communication Test
(link http://www.usriot.com/Download/199.html ) can help you test.
Serial to net debugging tester application:
1. Ensure the COM port baud rate, check bits, data bits, stop bit correspond to module parameters.
2. Ensure network protocol, IP address, port number correspond to module parameters.
3. Open COM and the web then connect. They begin transparent transmission after choose the module IP.
Diagram 2-4 USR-TCP232-Test Parameter

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2.4 Parameter Setting
2.4.1 Set via Net
1. Hardware Connection，refer to 2.1 Hardware Connection
2. Search module,
3. Click ”Search in LAN”
4. Setting your Parameter
5. Click ”Set selected item via Net”
6. Waiting for ten seconds and Click ”Search in LAN”check it.
Diagram 2-5 Set via net
2.4.2 Set via COM.
1. Hardware Connection，refer to 2.1 Hardware Connection
2. Connect CFG to GND pin
3. Click ”Read via COM”
4. Setting your Parameter

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5. Click ”Read via COM”and check it
6. Switch off CFG.
Diagram 2-6 Set via COM
2.4.3 Set DIY
By setting protocol, load in http://www.usriot.com/Download/206.html

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3. Module Work Mode
3.1 Structure Chart
Diagram 3-1 structure chart
3.2 UDP Mode
Diagram 3-2 UDP Mode

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In UDP mode, after the module is powered on listening on port Settings, not take the initiative to establish a
connection, when data from by forwarding to the serial port, when a serial port receives the data sent over the
network to the IP and port module Settings.
3.3 TCP Client
Diagram 3-3 TCP Client
In TCP client mode, after power on module according to their own Settings active TCP server to connect to
the server, and then establish a long connection, data transparent transmission after this mode, the TCP
server IP module would need to be visible and the visible means directly by module's IP can PING the server
IP, server side can be fixed IP, the Internet can also be internal network IP and module in the same local area
network.

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3.4 UDP Server Mode
Diagram 3-4 UDP Server Mode
UDP server refers to the normal UDP are not validated on the basis of the source IP address, destination IP
instead of the UDP packets are received data source IP, similar to TCP server functionality.
In this mode, the module by default record a destination IP, when a serial port data, to record the IP to send
data, at the same time, the module at the server status, to accept the network packets sent to module, and
adjust the target IP IP for the data source, suitable for multiple IP working mode for the module.
Use computer end program and UDP mode is exactly the same, no need to change.
Note:UDP mode, UDP server mode with a single maximum length of 1472 bytes should be controlled at or
below, if greater than this length, the module will automatically restart, the proposed subcontractor sent.

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3.5 TCP Server Mode
Diagram 3-5 TCP Server Mode
In TCP Server mode, module and gateway trying to communication first, and then monitor set up local port,
there is connection request response and create a connection, can exist at the same time up to 4 links, a
serial port after receipt of the data will be sent to all at the same time of establishing links with network module
device.
USR-TCP232-SETUP software, set the Index function can be achieved when to establish a multi-channel
connection, the module can identify communications equipment, and with the specified device to
communicate.
3.6 Virtual COM Mode
Virtual COM means to convent data TCP connected to data of a COM within PC for transparent transmission.
Take TCP Client mode for example:

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Loading http://www.usriot.com/Download/31.html
1. Disable firewall and antivirus program
2. Install Virtual COM
3. Setting TCP Server
Diagram 3-6 Virtual COM
4. Connect a com
Diagram 3-7 Virtual COM

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4. Hardware Description
Diagram 4-1 USR-K1
PCB lib: http://www.usriot.com/Download/232.html
4.1 Technical Specifications
Major characteristic
Parameter
Name
USR-K1
CPU
32bit 48MHz（Cortex-M0）
Flash
32KBit
RJ45
Socket
1
Speed
10/100M MDI/MDIX
Net protocol
IP，TCP，UDP，ARP，ICMP
Buffer
send：2K bytes，receive：1K bytes
Network interface
8 pin RJ45
Serial
Port Number
1
Interface Standard
TTL: pin type 3.3V
Data Bits
5，6，7，8
Stop Bit
1，1.5，2
Check Bit
None，Even，Odd，Space，Mark

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Baud Rate
TTL:110 bps ~ 921.6 Kbps
Flow Control
null
Buffer
receive: 800 bytes
RS-485 Pull-up and
Pull-Down Resistor
null,reserved 485 send-receive control pin
Parameter specification
Physical Size:
PCB size: 21.6*13.5*32.6MM（L*H*W）
Temperature and
humidity range
Operating temperature: -25 to 75 °C
Storage temperature: -40 to 80 °C
Storage humidity: 5% to 95% RH
Diagram 4-2 Technical Specifications
4.2 Hardware Description
Diagram 4-3 Technical Specifications

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No.
Pin
Function
Descriptions
1
ISP
Update pin
This pin to ground to the module power module can be
upgraded.If you do not use, can be suspended.
2
N/C
N/C
N/C
3
LINK
Can be used as a network connection status indicator pin
4
RST
RESET
Pin received 200ms low to reset the whole module.
If you do not use, can be suspended.
Note: The module is powered automatic reset, it is
recommended that connect the MCU IO port, reset the MCU
control module in a particular case.
5
485_EN
485 enable
Can be used as RS485 enable pin
6
CFG
Serial ports
Configuration pins
Low, you can use the serial port module configuration.
Normal working hours left floating or tied HIGH.
Note: give the power module, and then pulled down the CFG
pin to enter the serial configuration state.
7
LED2
Network data
instructions
Connect to 13
8
RXD
Module data is
received
Data receiving end of the module, TTL 3.3V microcontroller
9
TXD
Module data
transmission
Data transmission end of the module, TTL level can be
connected to 5V or 3.3V microcontroller
10
GND
Signal ground
GND
11
VCC
Power supply
Power supply: 3.3V @ 200mA
12
LED1
Network connection
status indicator
Connect to 16
13
LED2
Network data
instructions
Connect to 7
14
LED_3.
3
Network led power
Power 3.3V
15
LED_3.
3
Network led power
Power 3.3V
16
LED1
Network connection
status indicator
Connect to 12
Diagram 4-3 I/O introduce
4.3 Hardware to RJ45 Light

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Diagram 4-4 Hardware to RJ45 light
4.4 Size
Diagram 4-5 size

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5. Expand Functions
Diagram5-1 Expand functions
5.1 RS485
“485_en”for RS485, external enable control pin.
Set the software interface:
Diagram5-2 RS485
Select it by default

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5.2 Link
The Link pins for the module to establish a communication connection status indicates pin, establish the
communication Link pin will output low level, no connection is established, output high level.
"Link" for external Link instructions .
Set the software interface:
Diagram5-3 Link
Don’t select it by default
5.3 Reset
When the module as a TCP Client-side, the module will take the initiative to connect TCP SERVER. When
the Reset function, the module tries to connect to TCP Server-side 30 times, still unable to establish a
connection, the module will automatically restart.
Set the software interface:
Diagram5-3 Link
Don’t select it by default
5.4 ID
Module as TCP Client-side ID function for TCP Server-side distinguish between data sources, to achieve the
establishment of the connection or data communication process device ID will also be sent, the module ID
number is set to decimal, range 0 - 65535, requires the receiving end HEX format.
1.Select "Connect" to establish a communication connection, TCP Server-side will receive the corresponding
TCP Client-side ID (ID Description: The first four shows for the ID number, the last four digits of the display ID
negated to authentication).