USR IOT USR-K6 User manual

USR-K6 User Manual www.usriot.com
Jinan USR IOT Technology Limited 1 / 107 [email protected]
USR-K6 User Manual
File Version: V1.0.0

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Contents
1. Get Start ......................................................................................................................................................................... 5
1.1. Testing Environment ............................................................................................................................................ 6
1.1.1. Hardware Prepare..................................................................................................................................... 6
1.1.2. Hardware Connection............................................................................................................................... 8
1.2. Network Testing................................................................................................................................................... 8
1.3. Default Parameters.............................................................................................................................................. 9
1.4. Data Transport Testing....................................................................................................................................... 10
2. Overview....................................................................................................................................................................... 11
2.1. Brief Introduction .............................................................................................................................................. 11
2.2. Function feature ................................................................................................................................................ 11
2.3. Basic Parameters................................................................................................................................................ 12
3. Hardware Parameters................................................................................................................................................... 14
3.1. Pin Definition..................................................................................................................................................... 14
3.2. Dimension.......................................................................................................................................................... 15
4. Product Function .......................................................................................................................................................... 16
4.1. Network Basic Functions ................................................................................................................................... 17
4.1.1. IP address/ subnet masks/ gateway........................................................................................................ 17
4.1.2. DNS Server Address ................................................................................................................................ 19
4.1.3. Web Server ............................................................................................................................................. 20
4.1.4. Restore to the Factory Setting. ............................................................................................................... 21
4.1.5. Network Upgrade Firmware ................................................................................................................... 21

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4.2. Socket ................................................................................................................................................................ 21
4.2.1. TCP Client................................................................................................................................................ 23
4.2.2. TCP Server............................................................................................................................................... 27
4.2.3. UDP Client............................................................................................................................................... 30
4.2.4. UDP Server.............................................................................................................................................. 33
4.2.5. HTTPD Client........................................................................................................................................... 34
4.2.6. VCOM ..................................................................................................................................................... 37
4.3. Serial Port Function ........................................................................................................................................... 37
4.3.1. Basic Parameters..................................................................................................................................... 38
4.3.2. Serial Port Framing.................................................................................................................................. 38
4.3.3. RFC2217.................................................................................................................................................. 39
4.4. Special Function................................................................................................................................................. 43
4.4.1. Heartbeat Package.................................................................................................................................. 43
4.4.2. Registration package............................................................................................................................... 45
4.4.3. USR-cloud ............................................................................................................................................... 46
4.4.4. Customize webpage................................................................................................................................ 49
4.4.5. Link ......................................................................................................................................................... 50
4.4.6. Reset....................................................................................................................................................... 50
4.4.7. Index....................................................................................................................................................... 50
4.4.8. The number of the connected client ...................................................................................................... 53
4.4.9. State........................................................................................................................................................ 53
4.4.10. Short Connection.................................................................................................................................. 54

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4.4.11. Clear Buffer Data................................................................................................................................... 55
4.4.12. Restart Timeout.................................................................................................................................... 56
5. Parameter Setting......................................................................................................................................................... 57
5.1. Net Protocol Setting Parameters........................................................................................................................ 57
5.1.1. Setting Software Setting Parameters ...................................................................................................... 58
5.1.2. Setting Protocol Setting the Parameters ................................................................................................. 62
5.2. Webpage Setting Parameters ............................................................................................................................ 74
5.3. AT Command ..................................................................................................................................................... 80
5.3.1. AT Command Overview........................................................................................................................... 80
5.3.2. AT Command Error Code ........................................................................................................................ 82
5.3.3. AT Command .......................................................................................................................................... 82
5.3.4. AT Command Details............................................................................................................................... 85
6. Contact us................................................................................................................................................................... 106
7. Disclaimer................................................................................................................................................................... 106
8. Modified History......................................................................................................................................................... 107

USR-K6 User Manual www.usriot.com
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1. Get Start
USR-K6 is a small module for serial port to Ethernet, which can realize the bi-directed data transparent
transmission between RJ45 port and TTL serial port. It can be applied to interface 232 and 485 by level conversion
circuit.
Product link: https://www.usriot.com/products/low-cost-solution-super-port-ethernet-module.html
Related software:
M0 setting software: https://www.usriot.com/support/downloads/usr-m0-setup-software-v224288.html (which can
be also used in the the low cost serial to ethernet converters such as USR-TCP232-302, USR-TCP232-304 and
USR-TCP232-306, and embedded ethernet modules USR-TCP232-T2,USR-TCP232-S2)
Testing software: https://www.usriot.com/support/downloads/usr-tcp-test-testing-software.html
(USR-TCP232-Test.exe)

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Diagram 1-1 Download Page
Some question in you using, please refer to the applications:http://www.usr.cn/Faq/cat-46.html
Also can be submit to our USR custom supporting: http://h.usriot.com
1.1. Testing Environment
1.1.1. Hardware Prepare
USR-K6*1

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USR-Kx-EVK*1
Cable*1
Power (DC5V 1A)*1
Serial port cable *1
PC*1
Diagram 1.1.1-1 Testing Tools
1.Test purposes:
Test to realize the USR-K6, have a basic understanding of USR-K6
Test to know whether there are some thing wrong with it.
2.Data direction:
Diagram 1.1.1-2 Data Direction

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1.1.2. Hardware Connection
To test the conversion from serial port to ethernet, we put the serial port of K6 connected to PC via serial cable.
Connect the interface of the K6 and PC using net cable. After testing and found no mistake, powered for K6.
Diagram 1.1.2-1 Hardware Connection
Note: the power adapter and the cable are from USR
1.2. Network Testing
To prevent the thing that occurs when the custom use the K6 such as finding no server, can not ping and can not
enter the webpage, after connecting you should check the PC before testing.
1)Shut down firewall and antivirus software.
2)Shut down net card none-related and reserve only one local connection .
3)For the direct connection between PC and server, please provide a static IP in the same LAN with the IP of K6.

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Diagram 1.2-1 Local Connection of the PC
1.3. Default Parameters
Project
Intro
User name
admin
Key word
admin
IP address
192.168.0.7
Subnet masks
255.255.255.0
Default network gateway
192.168.0.1
Default work mode
TCP client
Default local port
0
Default target port
8234
Default local port
20108

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Default target IP
192.168.0.201
Serial port baud
115200
Serial parameter
None/8/1
Form 1.3-1 Default Parameters
1.4. Data Transport Testing
Then the serial port and ethernet can communicate bi-directly, steps are as fellows:
①Open the”USR-TCP232-Test.exe”and connect the hardware as the Diagram 1.1.2-1 Hardware Connection
②Select the TCP server mode in the “Net Setting”. Fill the PC IP into the server IP, server port 8324, click to start
listen and build TCP client. Baud rate:115200, serial parameters:None/8/1, then click to open the serial port.
Diagram 1.4-1 Default Parameters Testing

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2. Overview
2.1. Brief Introduction
USR-K6 is a tiny size serial port to Ethernet module which can realize the bi-direct data transparent transmission
between RJ45 port and TTL serial port. It can be applied to RS232 and RS485 by level conversion circuit.
Supports low power consumption, only consume a little current in full speed work. Equipped with Cortex-M0 core,
fast speed and high efficiency. Supports several functions to meet more need.
K6 is easy to operate and have strong compatibility. On the basis of adding new functions, it is compatible with the
setting protocol of K5, which provide convenience for old users. At the same time, a setting protocol similar to K3 is
added. For customers who adopt other series of products, it can be applied to K6 only by simple adjustment.
2.2. Function feature
adopted to Ethernet, supports AUTO-MDIX switching of network cable crossovers.
s:TCP server, TCP client, UDP server, UDP client, Httpd client, can be chose.
Parity including None, Odd, Eben, Mark, Space.
and keep the connection real and reliable, can be used to test the death
connection

Under TCP Server mode, the number of client connected can be modify from 1 to 16, default is 4. The IP of
connected client can be see. Send and receive data according to connection calculation.
Under TCP Server mode, when the client number reach the max number, the new client can instead of the old
one or not can be set.
AT command, serial port protocol, webpage setting parameter, setting protocol. Provide
custom to use in their own software.


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restart out time, the time can be set.



ort DNS, domain name resolution.


V-com.
tore to the factory setting.
g and router.

2.3. Basic Parameters
Parameter
Value
Input Voltage
DC3～3.6V
Working Current
136mA@3.3V
Net port
Rj45, 10/100mMbps
Serial port
600~460.8K(bps)
Software parameters
Network protocol
IP, IPV4, TCP/UDP, ARP, ICMP
Access way to IP
Static IP, DHCP

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DDNS
Support
User parameters
Software setting, webpage setting, AT
command
Single transparent transmission
TCP Server/TCP client/UDP Server/UDP Client
Similar RFC2217
Support
Httpd client
support
TCP server connection
Default 4 and maximum 16
Net buffer
Send:6Kbyte; receive:4Kbyte
Serial port buffer
Receive: 2048byte
Average transport delay
<10ms
Set software
USR-VCOM, USR-Cloud, parameters setting
software
Package mechanism
4 byte package time and 1024byte length
others
Certification
CE,FCC
Size
35.0x19.39x18.25 mm(L*W*H)
Operating Temp.
-25～+75°C
Storage temp
-45～+105°C
operating humidity
5%～95% RH
Storage humidity
5%～95% RH

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Package
Electrostatic bubble
Form 2.3-1 Basic Parameters
3. Hardware Parameters
3.1. Pin Definition
Diagram 3.1-1 Pin
Num
Pin
Function
Instr

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1
N/C
N/C
N/C
2
N/C
N/C
N/C
3
Link
Connected status
of TCP
Used as indication pin for TCP connection status. If the LINK
function is enable and connected, this LED will light.
4
RST
reset
Connected to the IP of the user’s MCU, reset when abnormal,
reset when the pin reach 200ms
5
485-en
Reserve pin
RS485 enable pin
6
CFG
(reload)
Configuring the pin
using serial
When normal working , don’t connect the pin or connect to
high level. Under low level, the pin is used for module
configuration, access to power then pull down“Reload” pin
Refer to 4.4.3 Factory Reset
7
LED2
Net port data instr
Single chip data indicator foot, when data transport in the
network, it will flash.
8
RXD
Module data
receive
TTL connect to 3.3v MUC
9
TXD
Module data send
TTL connect to 3.3v MCU
10
GND
Signal location
Grounding
11
VCC
Power
Power:3.3V@200mA
12
NC
\
Form 3.1-1 Pin Definition
3.2. Dimension

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Diagram 3.2-1 Dimension
4. Product Function
Here are the functions of K6, below is the overall block diagram.

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Diagram 4-1functions
4.1. Network Basic Functions
4.1.1. IP address/ subnet masks/ gateway
1. IP address is the identity representation of the module in the LAN, which is unique in the LAN, so please be sure
there is no another device same as it in the LAN.
Static IP
Handle to setting. Note fill the IP, subnet masks and gateway.
Static IP adopted to the environment that required to statistics the IP and the device and makes them correspond
one to one.
Advantage: accessing the device that can not distribute IP address can be searched via UDP broadcast.
Disadvantage: different net segment in the different LAN can not communicate normally.
DHCP

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Get IP address , gateway address, DNS server and other information from the gateway server to easy the step for
setting IP address, DHCP adopted to the environment that have no special requirement to IP.
Advantage: accessing the device equipment with the DHCP server such as router can communicate directly.
Reduce the hassle of setting IP address and subnet masks.
Disadvantage: accessing the device with no DHCP server such as computer directly, K6 can not work.
2. Subnet masks used to determine the host number and the network number, indicates the number of subnet and
determine the flag within the subnet. The subnet masks needed to set, usually we use the subnet masks: 255.255.255.0,
the network number is the former 24, the holder name is the last 8, number of subnet is 255, the module IP is in the
range of 255, and then we are sure that the module IP is in this subnet.
3. Gateway is the net port of the LAN. If you connect the router to access the internet, the gateway is the router IP
address, setting wrong and can not access into the net. No device such as router and no setting, keep the default.
4. Related AT command.
command name
instr
AT+WAN
Setting and query the access way of K6 IP, IP/subnet
masks/gateway parameters
From4.1.1-1 Related AT Command
5. Software setting:

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diagram 4.1.1-1 Software Setting
4.1.2. DNS Server Address
DNS servers are used to convert domain names into IP addresses that are recognized by the network. DNS server
address can be set, which can realize domain name resolution in the case of imperfect local domain name server. Users
can also set the address of specific DNS server according to requirements. When K6 needs domain name resolution, it
will submit the resolution request to the DNS server set.Using is more flexible and reliable.
In static IP mode, the default DNS server address is 208.67.222.222, and in DHCP mode, the DNS server address is
obtained automatically. Version 4015 above support domain name server address can be set.

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Diagram 4.1.2-1 DNS Setting Webpage
command name
Instr
AT+DNS
Setting and query the DNS address of K6
Form 4.1.2-1 Reference AT Command
4.1.3. Web Server
webpage server of K6 is same as the normal webpage server, which is convenient for user to setting parameter
and query the status.
The port of webpage can be setting, default is 80.
Steps:
Open the browser, fill the IP of K6, e.g.:192.168.0.7(IP address and PC in the same net segment.)
Fill the user name and key word in the login webpage, default is admin, click to enter.
TX Count: the data count sent from K6 to the external
RX Count: the data count received by K6 from thee net.