Shandong USR IOT Technology USR-C215A Serial to WIFI Module User Manual
Shandong USR IOT Technology Limited Serial to WIFI Module
User Manual
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Contents
1. Quick Start......................................................................................................................................................................... 4
1.1. Hardware Testing Environment.......................................................................................................................... 4
1.2. Data Transmission Testing.................................................................................................................................. 5
2. Overview............................................................................................................................................................................ 6
2.1. Brief Introduction................................................................................................................................................... 6
2.2. Features..................................................................................................................................................................6
2.3. Parameters.............................................................................................................................................................6
3. Hardware............................................................................................................................................................................7
3.1. Hardware Information...........................................................................................................................................7
3.1.1. Dimensions................................................................................................................................................. 7
3.1.2. Pin Defination............................................................................................................................................. 7
3.1.3. Antenna....................................................................................................................................................... 8
3.1.4. Evaluation kit.............................................................................................................................................. 8
3.2. Hardware Reference Design...............................................................................................................................9
3.2.1. Typical Application Connection............................................................................................................... 9
3.2.2. Power Interface.......................................................................................................................................... 9
3.2.3. UART Interface........................................................................................................................................ 10
3.2.4. Reset & Reload........................................................................................................................................10
4. Module Function............................................................................................................................................................. 11
4.1. Wireless Network Mode..................................................................................................................................... 11
4.1.1. Work as STA.............................................................................................................................................11
4.1.2. Work as AP............................................................................................................................................... 12
4.1.3. Work as AP+STA..................................................................................................................................... 12
4.1.4. Encryption Type....................................................................................................................................... 12
4.2. Work Mode...........................................................................................................................................................13
4.2.1. Transparent Transmission Mode.......................................................................................................... 13
4.2.1.1. Short Description......................................................................................................................... 13
4.2.1.2. UART Frame................................................................................................................................. 13
4.2.2. Command Mode...................................................................................................................................... 14
4.3. Socket Connection............................................................................................................................................. 14
4.4. Search in LAN..................................................................................................................................................... 15
4.5. Registration Packet Mechanism.......................................................................................................................15
4.6. Usrlink (Fast Networking Protocol).................................................................................................................. 15
4.7. Simplelink............................................................................................................................................................. 17
4.8. Class RFC2217...................................................................................................................................................18
5. Setting Method................................................................................................................................................................19
5.1. Webpage.............................................................................................................................................................. 19
5.1.1. WiFi Parameter Setting.......................................................................................................................... 20
5.1.2. Transparent Transmission Parameter Setting....................................................................................21
5.1.3. Extra Function.......................................................................................................................................... 22
5.1.4. System Setting.........................................................................................................................................23
5.1.5. About USR................................................................................................................................................ 24
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5.2. AT Command Instructions................................................................................................................................. 24
5.2.1. AT Command Description...................................................................................................................... 25
5.3. AT Instruction Set................................................................................................................................................26
5.3.1. AT Command List.................................................................................................................................... 26
5.3.1.1. AT+E...............................................................................................................................................27
5.3.1.2. AT+WMODE..................................................................................................................................27
5.3.1.3. AT+ENTM...................................................................................................................................... 28
5.3.1.4. AT+MID.......................................................................................................................................... 28
5.3.1.5. AT+RELD.......................................................................................................................................28
5.3.1.6. AT+Z............................................................................................................................................... 28
5.3.1.7. AT+H (not available now)............................................................................................................29
5.3.1.8. AT+CFGTF.................................................................................................................................... 29
5.3.1.9. AT+UART.......................................................................................................................................29
5.3.1.10. AT+UARTTE............................................................................................................................... 30
5.3.1.11. AT+NETP.....................................................................................................................................30
5.3.1.12. AT+TCPLK.................................................................................................................................. 31
5.3.1.13. AT+TCPDIS................................................................................................................................ 31
5.3.1.14. AT+SOCKB................................................................................................................................. 31
5.3.1.15. AT+TCPDISB..............................................................................................................................32
5.3.1.16. AT+TCPLKB................................................................................................................................32
5.3.1.17. AT+WSSSID............................................................................................................................... 32
5.3.1.18. AT+WSKEY.................................................................................................................................33
5.3.1.19. AT+WANN................................................................................................................................... 33
5.3.1.20. AT+WSMAC................................................................................................................................34
5.3.1.21. AT+WSLK....................................................................................................................................34
5.3.1.22. AT+WSLQ................................................................................................................................... 34
5.3.1.23. AT+WSCAN................................................................................................................................ 35
5.3.1.24. AT+WSDNS................................................................................................................................ 35
5.3.1.25. AT+LANN.................................................................................................................................... 35
5.3.1.26. AT+WAP...................................................................................................................................... 36
5.3.1.27. AT+WAKEY.................................................................................................................................36
5.3.1.28. AT+WALK.................................................................................................................................... 36
5.3.1.29. AT+PLANG..................................................................................................................................37
5.3.1.30. AT+DTDDIS................................................................................................................................ 37
5.3.1.31. AT+DTDID................................................................................................................................... 37
5.3.1.32. AT+WRMID................................................................................................................................. 38
5.3.1.33. AT+ASWD................................................................................................................................... 38
5.3.1.34. AT+SMTLK..................................................................................................................................38
5.3.1.35. AT+USERVER............................................................................................................................38
5.3.1.36. AT+RPTMAC.............................................................................................................................. 39
5.3.1.37. AT+WRRPTMAC....................................................................................................................... 39
6. Contact Us....................................................................................................................................................................... 40
7. Disclaimer........................................................................................................................................................................ 40
8. Update History................................................................................................................................................................ 40
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1. Quick Start
USR-C215 is a cost effective serial to WiFi module, which allows almost any serial devices to be
connected to a new or existing WiFi network, realize the two-way data transparent transmission between
UART and WiFi network interface.
This chapter aims at getting start USR-C215 quickly. It’s recommended that user read this chapter
systemically and operate it according to instructions to make a scientific knowledge. Following chapter will
introduce specific details, user can read interested chapter according to need.
If you have any question, feed it back to customer center please: http://h.usriot.com
1.1. Hardware Testing Environment
For quick testing, our evaluation kit is recommended. Testing steps as follows:
1. Hardware connection: Connect the module with PC by serial cable, power on, the Ready indicator will
be on.
2. Wi-Fi connection: Open Wi-Fi on your PC, scan and join the module network: USR-C215.
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1.2. Data Transmission Testing
We supply testing software “USR-TCP232-Test.exe”, pls download from this link:
http://www.usriot.com/usr-tcp-test-v1-3/
Module default parameters:
SSID: USR-C215
Encryption type: open, none
UART settings: 115200, 8, 1, N
Net settings: TCP, Server, 8899, 10.10.100.254
IP address of module: 10.10.100.254
Steps for UART to Wi-Fi data transmission:
1. Open “USR-TCP232-Test.exe”, on the left is COM part, on the right is Net part.
2. UART settings: UART settings should be the same with module, that is : 115200, N, 8, 1
3. Click Open to open the serial port.
4. Socket connection: Module default setting is TCP Server, so we should select TCP Client as protocol.
Server IP and Port is module IP and Port: 10.10.100.254; 8899.
5. Click Connect to establish TCP connection
6. Now we can realize data transmission between UART and WiFi.
The flow direction from UART to Net: COM of PC--> COM of module--> WiFi of module--> Net of PC.
The flow direction from Net to UART: Net of PC--> WiFi of module--> COM of module--> COM of PC.
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2. Overview
2.1. Brief Introduction
The USR-C215 is integrated with MAC, baseband IC, RF transceiver unit and power amplifier. With
built-in low power operation mechanism, can effectively achive low power running. Support WiFi protocol and
TCP/IP protocol, with simple settings, realize connection for serial devices with network.
Dimensions of module: 22*13.5*6mm, single row 1*10 2m encapsulation
Basic functions of module:
Can work as AP mode, in this mode, other WiFi terminals can join it for communication. Also can work
as STA mode, join wireless router and realize transmission.
Support UART transparent transmission, switch by AT command
2.2. Features
Support Wi-Fi@2.4 GHz 802.11b/g/n wireless standard
Support WEP, WPA/WPA2 security
Support AP, STA, AT+STA work mode
Integrated serial to WiFi transmission function, multiple UART rate for selection
Support TCP/UDP Client registration mechanism
Simplelink/Usrlink fast network setting
Automatic baudrate adaptation which is similar to RFC2217
3.3V single power
Low power mode, support deep sleep
2.3. Parameters
Parameters Value
Wireless
Parameters
Wirless standard 802.11 b/g/n
Transmit
17.0 dBm @ 1 DSSS
15.0 dBm @ 11 CCK
13.5 dBm @ 54 OFDM
Receive sensitivity
–91.5 dBm @ 1 DSSS
–87.5 dBm @ 11 DSSS
–80.5 dBm @ 54 OFDM
Antenna on board ceramic antenna
Hardware
Parameters
Interface UART
Working voltage 3.0V~3.6V
Working current In AP mode: average 70mA@3.3V
In STA mode: average 30ma@3.3V
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Working
temprature -30°C - 70°C
Storage temprature -55°C - 125°C
Dimensions 22mm x 13.5mm x 6mm
External interface Pins plug
Software
Parameters
Network type AP, STA, AP+STA
Security WEP/WPA-PSK/WPA2-PSK
Encryption TKIP,AES ,TKIP/AES
Net protocol IPv4, TCP/UDP
User config AT + command, Webpage
3. Hardware
3.1. Hardware Information
3.1.1. Dimensions
Dimension of module is 22.0*13.5mm, error±0.2mm
3.1.2. Pin Defination
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Pin Defination List:
Pin Name Type Description
1 GND P GND
2 VDD P Positive of power, 3.3V
3 RELOAD I Pull down 1-3s: start simplelink
Pull down more than 3s: reload to factory defaults
4 RESET I Reset, effective in low level
5 UART_RX I Receive
6 UART_TX O Transmit
7 PWR_SW N Vacant, not available
8 WPS N Vacant, not available
9 READY O Working indicator, effective in low level, can connect
external LED
10 nLINK O WiFi link indicator, effective in low level, can connect
external LED
<Note>
In Type list: power is expressed as P, input is expressed as I, output is expressed as O, not available is
expressed as N
3.1.3. Antenna
3.1.4. Evaluation kit
We supply evaluation kit for users convenient development. As shown in below image, user can choose
UART interface for communication
Antenna Type: Ceramic Antenna
Antenna GAIN: 2.5dbi
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Evaluation kit interface description
Function Name Description
External
interface
DC Jack 5V power input jacker
DB9 9-Pin male connector
LED Ready Green light, module working indicator
nLink Red, nLink/GPIO indicator
Button nReload Reload to factory defaults
3.2. Hardware Reference Design
3.2.1. Typical Application Connection
3.2.2. Power Interface
Switching power supply is recommended. VCC working voltage range from 3.0V~3.6V, 3.3V is the best.
Power module by main power pin, the pin be in parallel with storage capacitance and high frequency
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capacitance. Circuit diagram as shown below:
Power Supply Characteristics
Symbol Parameter Min Type Max Unit
V_MAIN Power supply voltage 3.0 3.3 3.6 V
<Note> Io current
AP: 70mA@3.3V
STA: 30mA@3.3V
3.2.3. UART Interface
If communicate with MCU(3.3V) directly, should connect TXD of module to RXD of MCU, connect RXD of
module to TXD of MCU. If MCU is 5V level, a switching circuit is needed, see below diagram:
3.2.4. Reset & Reload
USR-C215 support hardware reload function, by connect nReload pin with external button or setting pin.
When pull down to “0” for 1~3s, simplelink function will start. When pull down to “0” for more than 3s, module
will restore to factory defaults. Here should link to a pull-up resistor (4.7K~10K)
nReset: reset signal, module will restart when it is pulled down. There exist a 100K resistance pull up to
3.3V. When module is powered on or break down, MCU will reset the module, pull down pin at least 0.5s, then
pull up or vacant.
Reference diagram as follows:
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4. Module Function
4.1. Wireless Network Mode
There are 3 types wireless network mode: AP, STA, AP+STA
<Description>
AP: Access Point, it is the center of wireless network. For example router, router is an AP, other
stations can connect to each other throught it.
STA: Station, it is the terminal of wireless netwotk. For example laptop, PAD, cell phone.
4.1.1. Work as STA
It is the most commonly used network type for module to work as STA. Consist of a AP(router) and multi
STAs, see below image. The AP is in central position, communication between STAs forward by AP.
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4.1.2. Work as AP
Module can work as AP, in AP mode, cell phone/PAD/PC can get access to module for data transmission
without any settings. Besides, user can log in module built-in webpage for configuration.
<Note>
When module works in AP mode, 3 STAs can join it.
4.1.3. Work as AP+STA
Module can work as AT and STA at the same time, shown as below:
<Note>
In this mode, 3 STAs can join the module network
4.1.4. Encryption Type
To ensure the safety of data communication, module supports variety of encryption type. Including:
WEP
WPA-PSK/TKIP
WPA-PSK/AES
WPA2-PSK/TKIP
WPA2-PSK/AES
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Work Mode
4.2. Work Mode
USR-C215 support 2 work mode: transparent transmission mode and command mode
Transparent transmission mode
In this mode, module will transmit data between UART&WiFi, to realize the communication between serial
device and network device.
Command mode:
In this mode, user can query/set the UART and network parameters by AT commands. Use command
AT+ENTM to quit command and switch to transparent transmission mode.
4.2.1. Transparent Transmission Mode
4.2.1.1. Short Description
The advantage of this mode is to realize plug and play between UART interface and network
communication, that will reduce the complexity for users. With essential parameter settings in advance, after
power on, module will automatically connect to the pre-set wireless network and server.
This mode is fully compatiable with users software, which reduce the workload for development of
intergrade wireless software.
Parameters need to set in advance
WiFi network
SSID
Encryption
Password
Default TCP/UDP connection
Protocol
Type (Client/Server)
Destination Port
Destination IP
UART Interface
Baud rate
Data bit
Stop bit
Check bit
Hardware flow control (rts/cts)
4.2.1.2. UART Frame
When module receive data sent from UART, it wil keep checking the time interval of 2 adjacent bytes. If
time interval is greater than frame time you set (default 20ms, can set by command AT+UARTTE), module will
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judge this frame is over, or it will keep receiveing data. In command mode, if greater than 1K bytes, module will
discard the received data. In transparent transmission mode, if greater than 1K bytes, module will send in
packet.
Packet process as following diagram: n is packet time interval, unit: ms
4.2.2. Command Mode
In command mode, module no longer work for transparent transmission, UART interface is used to
receive AT command. User can send AT command to module by UART, to query/set parameters of UART and
network.
Detailed AT instruction pls refer to chapter 5.3
4.3. Socket Connection
Module has a serial port UART0, which can communicate with Socket connection.
There are 2 Sockets: Socketa and Socketb
When module works in transparent transmission mode, the data sent to UART, will automatically be sent
to Socket. The data received by Socket, will be sent out by UART interface.
Protocol for Socketa: TCP Server, TCP Client, UDP Server, UDP Client. Setting method refer to command
AT+NETP
Protocol for Socketb: TCP Client, UDP Server, UDP Client. Setting method refer to command AT+SOCKB
When it set to be TCP Server, can support up to 5 TCP Clients for 5 Socket connections. In multi TCP
connection, data from TCP transmission will be forwarded one by one to UART interface. Data from UART will
be copied into muiti and be forwarded to each TCP connection. Data flow diagram as follows:
When it set to be UDP Server, if UART receive data first, module will send data to pre-set IP and Port (set
by AT+NETP or AT+SOCKB). If UDP Server receive data, module will remeber the source address which sent
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data, afterwards when UART receive data, module will forward data to this address.
When it set to be UDP Client, module send to the pre-set IP and Port only, and only receive data from
pre-set IP and Port. Data from other address will not be sent to UART.
4.4. Search in LAN
Module can be searched in LAN, that is, when module get access to the wireless router, user can obtain
module current IP address by sending UDP broadcast to a certain port, to realize device serach and
communicate. The port and keywords can be set by AT+SEARCH, default 48899,www.usr.cn
Search Tool Process
1. On another device in LAN, send a command by UDP broadcast
UDP broadcast: address xx.xx.xx.255, port 48899
Command: www.usr.cn, max 20 bytes can be set
2. After module receiving the command, if command is correct, module will switch to config mode, send
local IP, MAC, MID and version no. to this address
(IP, MAC, MID, ver example: 10.10.100.254, D8B04CFC0000, USR-C215, 01.01.10)
Module will quit the config mode, if it did not receive setup commands in 30s after get into config mode.
User need to resend search commands to switch config mode.
3. User can query/set module work status by sending network AT command to this port. AT command the
same as UART AT command.
<Note>
Search tool must be in the same LAN with module. If multi STAs connect to a router, the PC with search
tool also under this router, search tool will obtain all STAs modules.
4.5. Registration Packet Mechanism
When module works in TCP Client or UDP Client mode, user can open registration packet function, in this
way, server can distinguish data source, to realize data mornitoring for different devices. There are 2 type:
MAC and ID. MAC is 6 bytes, ID range from 1~65535. We no longer use ID, but recommend MAC now.
Command AT+REGENA to open and close this function.
Registration packet mechanism way as follows:
TCP Client: 2 ways
Send once only. When module connect to TCP Server, module will send registration packet to
TCP Server.
Send in each data packet. When TCP Client connect to server, registration packet will be insert
into the front of each data packet
UDP Client
Registration packet will be insert into the front of each data head and send.
4.6. Usrlink (Fast Networking Protocol)
When module works in AP mode, will open an UDP port, which is used to receive fast networking protocol
command, port number is 48899 (the same as search in LAN port, can be set). Smart phone can connect with
module WiFi network directly, through commands under UDP protocol, query SSID information list and set
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router SSID&Password. After setup, module will restart and connect to pre-set router. Now module works in
STA mode.
Protocol format instructions
Query command
No. Name No. of bytes Instruction
1 Packet head 1 Fixed value 0xFF
2 Length 2 All the bytes after length (not included) and in front
of check (not included)
3 Command word 1 Command type, 0x01 is query command
4 Check words 1 Cumulate SUM of all bytes after packet hear (not
included) and in front of check (not included)
Query response command
No. Name No. of bytes Instruction
1 Packet head 1 Fixed value 0xFF
2 Length 2 All the bytes after length(not included) and in front
of check(not included)
3 Command word 1 Command type, corresponding response
command for query command is 0x81
4 No. of AP 1 No. of AP that searched at present
5 SSID1 Not regular SSID of router 1
6 End mark 1 SSID end mark of router 1, fixed value 0x00
7 Signal strength 1 1 Signal strength of router 1 network, range from
0~100, corresponding actual value is 0%~100%
8 End mark 2 End mark of signal strength 1, 0x0D, 0x0A.
… … … ………
M SSIDn Not regular SSID of router n
M+1 End mark 1 SSID end mark of router n, fixed value 0x00
M+2 Signal strength n 1 Signal strength of router n network, range from
0~100, corresponding actual value is 0%~100%
M+3 End mark 2 End mark of signal strength n, 0x0D, 0x0A.
M+4 Check words 1 Cumulate SUM of all bytes after packet hear (not
included) and in front of check (not included)
Example:
Smart phone send to module (in HEX): FF 00 01 01 02
Module response to smart phone (in HEX): FF 00 14 81 02 54 45 53 54 31 00 40 0D 0A
54 45 53 54 32 00 37 0D 0A 1F
Explaination: smart phone send query command to module to check router information. Module replied
information to smart phone: there are 2 routers. SSID of router 1 is “TEST1”, signal strength is 64%. SSID of
router 2 is “TEST2”, signal strength is 55%
<Note>
The router information that module replied is ordered according to signal strength.
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Set instructions
No. Name No. of bytes Instruction
1 Packet head 1 Fixed value 0xFF
2 Length 2 All the bytes after length (not included) and in
front of check (not included)
3 Command word 1 Command type, 0x02 is query command
4 Reserved word 1 Default 0x00
5 SSID Not regular SSID of router
6 Separator 2 Separator of SSID, fixed value 0x0D, 0x0A
7 Password Not regular Password of router
8 Check words 1
Cumulate SUM of all bytes after packet hear
(not included) and in front of check (not
included)
Response instructions
No. Name No. Of bytes Instruction
1 Packet head 1 Fixed value 0xFF
2 Length 2 All the bytes after length (not included) and in
front of check (not included)
3 Command word 1 Command type, 0x82 is the corresponding
response command for setting command
4 Check value 1
Check resault for SSID
0x01: corresponding network for SSID can be
find
0x00: can’t be find
5 Check value 1
Check resault for password
0x01: password correct
0x00: password incorrect
6 Check words 1
Cumulate SUM of all bytes after packet hear
(not included) and in front of check (not
included)
Example
Mobile phone send to module (in HEX): FF 00 0F 02 00 54 45 53 54 31 0D 0A 31 32 33 34 35 36 CE
Module response to mobile phone (in HEX): FF 00 03 82 01 01 87
Instruction: mobile phone send setting command to module, set SSID to be “TEST1”, password to be
“123456”. The information which module reply to phone is: the network “TEST1” is exist, password is correct
4.7. Simplelink
This function is to realize module for intelligent networking, that is to connect to AP easily, no need to
establish connection with module. Steps:
1. Install the APP in mobile
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2. Pull down Reload pin for 1-3s, module will switch to Simplelink mode. Ready pin output 0.5Hz level.
3. Open APP in mobile, input password, click “connect”
4. Module will restart if connect to AP successfully. APP will receive MAC address sent by module.
4.8. Class RFC2217
RFC2217 is a standard protocol which is used to modify UART settings by Ethernet port. USR-C215
support a protocol that is class with RFC2217, can realize the same function, but it is easier.
After sending command to device, will excute UART settings and reply nothing if ok. If check or protocol
incorrect, it will be regarded as common data packet and forwarded by serial port.
It is workable in TCP Client, TCP Server, UDP Client, UDP Server mode.
Its modification will immediately take effect, no need to restart, valid for once, not saved, lost if power off.
Protocol length: 8 bytes. Example in HEX, detailed protocol as follows:
Attached: Bit instructions
Bit No. Instruction Value Description
1:0 Data bit choose 00 5
01 6
10 7
11 8
2 Stop bit 0 1
1 2
3 Check bit enable 0 Disable
1 Enable
5:4 Check bit type 00 ODD
01 EVEN
10 Mark
11 Clear
7:6 Undefinition 00 Pls write 0
Name Packet header Baud rate Bit Sumcheck
No. Of bytes 3 3 1 1
Instruction 3 bytes to
reduse error
3 bytes mean one
baud rate value,
high in front
Different bit
means different,
see attached list
Sumcheck of 4 bit
in front, ignore
carry
Example
(115200,N,8,1) 55 AA 55 01 C2 00 83 46
Example
(9600,N,8,1) 55 AA 55 00 25 80 83 28
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5. Setting Method
Module can be set by Webpage and AT command
5.1. Webpage
First time when use the module, we should do some necessary settings.
Access into Webpage:
1. Open WiFi network and search
2. Scan WiFi and select USR-C215, connect
3. Input 10.10.100.254 in browser
4. Input username and password
Default settings:
Parameters Default settings
SSID USR-C215
IP address 10.10.100.254
Username admin
Password admin
Access into the webpage, you can choose English on the top right conner. There are 6 parts in total:
“Sys Status”, “Trans Setting”, “Extra function”, “System Setting”, “About USR”
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5.1.2. Transparent Transmission Parameter Setting
1. Serial Port Settings, including: baud rate, data, check, stop, CTS/RTS
2. Socket Connection Settings, including: protocol, IP, Port
3. Socketb Connection Settings, including: protocol, IP, Port.
Click “Save” to save your settings.
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5.1.5. About USR
5.2. AT Command Instructions
In AT command mode, module can be set by UART.
Default UART settings: 115200, None, 8, 1
<Note>
We recommend SecureCRT as AT command debug tool
Steps to switch transparent transmission mode to AT command mode:
1. Input “+++” in UART
2. Module receive and reply “a”
3. Input “a” in UART
4. Module receive and reply “+OK”, switch into AT command mode
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<Note 1>
There is no echo when input “+++” and “a”, as below image
<Note 2>
To avoide the module get into command mode in normal work, need to input “+++” and “a” within a certain
time, see requirement below:
Steps to switch to AT command mode to transparent transmission mode
1. In AT command mode, input AT+ENTM, end with carrage return
5.2.1. AT Command Description
AT+ command can be input through serial debugger and programs
AT+ command adopts the command line based on ASCII code, command format as follows:
Format Instruction
< >: essential part
[ ]: optional part
Command Information
AT+<CMD>[op][para-1,para-2,para-3,para-4,...]<CR>
AT+: prefix of command
[op]: command operator, indicate Query or Set
“=”: set
“NULL”: Query
[para-n]: the input parameter for settings, no need for query
<CR>: end mark, carrage return, 0X0A or 0X0D in ASCII
<Note>
If user did not close echo function(AT+E), the command which you input will be send back, <CR> not
back.
Response Information
<CR><LF>+<RSP>[op] [para-1,para-2,para-3,para-4,...]<CR><LF>
+: prefix of reponse information
RSP: response character string,including
“OK”: succeed
“ERR”: failed
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[para-n]: response parameters or error code
<CR>: 0x0d in ASCII code
<LF>: 0x0a in ASCII code
Error code
Error code list
Error code Instructions
-1 Invalid command format
-2 Invalid command
-3 Invalid operator
-4 Invalid parameter
-5 Operating not permit
5.3. AT Instruction Set
5.3.1. AT Command List
NO Command Description
Manage command
1 E Open/Close echo function
2 WMODE Query/Set Wi-Fi mode (AP/STA/APSTA)
3 ENTM Enter transparent transmission mode
4 MID Query module ID
5 RELD Reload to factory defaults
6 Z Reset module
7 H Help (not available now)
Config parameters command
8 CFGTF Copy user settings tobe factory defaults
UART command
9 UART Query/Set UART settings
10 UARTTE Query/Set time interval between each 2 bytes for free
frame
SOCK A parameters command
11 NETP Query/Set network protocol parameters
12 TCPLK Query whether TCP link established
13 TCPDIS Connect/Disconnect TCP link
SOCK B parameters command
14 SOCKB Query/Set network protocol parameters of SOCKB
15 TCPDISB Comnnect/Disconnect TCP_B link
16 TCPLKB Query whether TCP_B link established
WiFi STA command
17 WSSSID Query/Set SSID that related to AP
18 WSKEY Query/Set encrypting parameters of STA
19 WANN Query/Set network parameters of STA
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20 WSMAC Query MAC address of STA
21 WSLK Query wireless link status of STA
22 WSLQ Query signal strength for STA to connect AP
23 WSCAN Scan AP
24 WSDNS Query/Set DNS server address in STA mode for static
setting
WiFi AP command
25 LANN Query/Set network parameters of AP
26 WAP Query/Set WiFi config parameter of AP
27 WAKEY Query/Set encrypting parameters of AP
28 WALK Query MAC address of STA which connect to AP
Webpage command
29 PLANG Query/Set language of webpage
D2D command (not recommend)
30 DTDDIS Open/Close D2D function
31 DTDID Query/Set D2D ID
Other command
32 WRMID Set module ID
33 ASWD Query/Set search command of module
34 SMTLK Open Smartlink function
35 USERVER Query user version and compile time
36 RPTMAC Query whether open report MAC function
37 WRRPTMAC Set whether open report MAC function
5.3.1.1. AT+E
Function: Query/Set echo settings of at command
Format:
Query
AT+E <CR>
+OK=<on/off><CR><LF><CR><LF>
Set
AT+E=<on/off><CR>
+OK<CR><LF><CR><LF>
Parameters:
on: open echo, echo the command that in AT command mode.
Off: do not echo the command in AT command mode.
5.3.1.2. AT+WMODE
Function: Query/Set WiFi work mode (AP/STA/APSTA)
Format:
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Query
AT+WMODE<CR>
+ok=<mode><CR><LF><CR><LF>
Set
AT+ WMODE=<mode><CR>
+ok<CR><LF><CR><LF>
Parameters:
Mode: WI-FI work mode
AP
STA
APSTA
5.3.1.3. AT+ENTM
Function: switch to transparent transmission mode
Format:
AT+ENTM<CR>
+ok<CR><LF><CR><LF>
After the command execute correctly, module will switch to transparent transmission mode
5.3.1.4. AT+MID
Function: Query module ID
Format:
AT+MID<CR>
+ok=<module_id><CR><LF><CR><LF>
Parameters:
module_id: module ID
USR-C215
Note: can set this parameter by AT+WRMID
5.3.1.5. AT+RELD
Function: Reload to factory defaults
Format
AT+ RELD<CR>
+ok=rebooting...<CR><LF><CR><LF>
This command restore factory defaults, then restart automatically
5.3.1.6. AT+Z
Function: Reset
Format:
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AT+ Z<CR>
5.3.1.7. AT+H (not available now)
Function: Help
Format:
AT+H<CR>
+ok=<command help><CR><LF><CR><LF>
Parameters:
command help: command help instruction
5.3.1.8. AT+CFGTF
Function: Copy user config parameters tobe factory defaults
Format:
Query
AT+CFGTF<CR>
+ok=<status><CR><LF><CR><LF>
Parameters:
status: response operate status
SAVED: set succeed
NON-SAVED: set failed
5.3.1.9. AT+UART
Function: Query/Set UART settings
Format:
Query
AT+UART<CR>
+ok=<baudrate,data_bits,stop_bit,parity,flowctrl><CR><LF><CR><LF>
Set
AT+UART=<baudrate,data_bits,stop_bit,parity,flowctrl><CR>
+ok<CR><LF><CR><LF>
Parameters:
baudrate:
1200,2400,4800,9600,14400,19200,38400,57600,115200,128000,
153600,230400 bit/s
data_bits:
8
stop_bits:
1
parity:
NONE
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EVEN
ODD
MARK
SPACE
flowctrl:
hardware flow control CTSRTS
NFC: no flow control
5.3.1.10. AT+UARTTE
Function: Query/Set time interval of free framing
Format:
Query
AT+ UARTTE<CR>
+OK=<num><CR><LF><CR><LF>
Set
AT+ UARTTE=<num ><CR>
+OK<CR><LF><CR><LF>
Parameters:
num: range from 20-250, unit in ms. Time interval between 2 bytes in free frame mode.
Note: now parameters will automatically change when setting baudrate. If need modifying time interval,
need to set baudrate in advance.
When baudrate <= 1200, num=250ms
When baudrate >= 20000, num=20ms
When 1200 < baudrate < 20000, num=2000/baudrate*10*20, num take integer
5.3.1.11. AT+NETP
Function: Query/Set network protocol parameter
Format:
Query
AT+NETP<CR>
+ok=<protocol,CS,port,IP><CR><LF><CR><LF>
Set
AT+NETP=<protocol,CS,port,IP><CR>
+ok<CR><LF><CR><LF>
Parameters:
protocol:
TCP
UDP
CS: network mode
SERVER
CLIENT
Port: protocol port, in decimal, less than 65535
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IP: when module is set to be “Client”, the destination IP address
If module set to be UDP, SERVER mode, IP address and port can be saved. Module will automatically
save the latest received IP address and port, and send data to this address. Module in initialization mode, will
send data to this address and port.
If set to be UDP, CLIENT mode, no remeber function.
5.3.1.12. AT+TCPLK
Function: Query whether TCP link is established
Format:
AT+ TCPLK<CR>
+ok=<sta><CR><LF><CR><LF>
Parameters:
sta.: whether TCP link is established
on: established
off: not established
5.3.1.13. AT+TCPDIS
Function: Connect/Disconnect TCP link
Format:
Query
AT+TCPDIS<CR>
+ok=<sta><CR><LF><CR><LF>
Set
AT+ TCPDIS =<on/off><CR>
+ok<CR><LF><CR><LF>
Parameters:
sta: reply the TCP Client status, if can be connect or not
on: can be connect
off: can’t be connect
5.3.1.14. AT+SOCKB
Function: Query/Set SOCKB network protocol parameters
Format:
Query
AT+SOCKB<CR>
+ok=<protocol,port,IP><CR><LF><CR><LF>
Set
AT+SOCKB=<protocol,port,IP><CR>
+ok<CR><LF><CR><LF>
Parameters:
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protocol:
TCP: TCP Client
UDP: UDP Client
USPS: UDP Server
Port: protocol port, in decimal, less than 65535
IP: destination IP address, support DNS
If module set to be UDPS, IP address and port can be saved. Module will automatically save the latest
received IP address and port, and send data to this address. Module in initialization mode, will send data to this
address and port.
Note: SOCKETB can be closed by command AT+SOCB=NONE
5.3.1.15. AT+TCPDISB
Function: Connect/Disconnect TCP_B link
Format:
Query
AT+TCPDISB<CR>
+ok=<sta><CR><LF><CR><LF>
Set
AT+ TCPDISB =<on/off><CR>
+ok<CR><LF><CR><LF>
Parameters:
off: module will not try to establish link, that is, when module receive the command, it will
disconnect and not connect again.
on: module will connect to server immediately.
This command will not be saved, default open after reset.
5.3.1.16. AT+TCPLKB
Function: Query whether TCP_B link is established
Format:
AT+ TCPLKB<CR>
+ok=<sta><CR><LF><CR><LF>
Parameters
sta.: whether TCP_B link is established
on: established
off: not established
5.3.1.17. AT+WSSSID
Function: Query/Set SSID of AP
Format:
Query
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AT+WSSSID<CR>
+ok=<ap's ssid><CR><LF><CR><LF>
Set
AT+ WSSSID=<ap's ssid ><CR>
+ok<CR><LF><CR><LF>
Parameters:
ap's ssid:SSID of AP, max 32 bytes
5.3.1.18. AT+WSKEY
Function: Query/Set encryption parameters of STA
Format:
Query
AT+WSKEY<CR>
+ok=<auth,encry,key><CR><LF><CR><LF>
Set
AT+ WSKEY=< auth,encry,key><CR>
+ok<CR><LF><CR><LF>
Parameters:
auth: authentication mode, including
OPEN
SHARED
WPAPSK
WPA2PSK
encry: encryption, indluding
NONE: valid when “auth=OPEN”
WEP-H: valid when “auth=OPEN” or “SHARED”, in HEX password format
WEP-A: valid when “auth=OPEN” or “SHARED”, in ASCII password format
TKIP: valid when “auth= WPAPSK or WPA2PSK”
AES: valid when “auth= WPAPSK or WPA2PSK”
key: passwork
When encry=WEP-H, password in HEX, 10 or 26 bytes
When encry=WEP-A, password in ASCII, 5 or 13 bytes
Others in ASCII code, greater than 8 bytes and less than 64 bytes
5.3.1.19. AT+WANN
Function: Query/Set network parameters of STA
Format:
Query
AT+WANN<CR>
+ok=<mode,address,mask,gateway><CR><LF><CR><LF>
Set
AT+ WANN=< mode,address,mask,gateway ><CR>
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+ok<CR><LF><CR><LF>
Parameters:
mode: network IP mode of STA
static: static IP
DHCP: dynamic IP
address: IP address of STA
mask: subnet mask of STA
gateway: gateway of STA
5.3.1.20. AT+WSMAC
Function: Query/Set MAC assress of STA
Format:
Query
AT+WSMAC<CR>
+ok=<mac_address><CR><LF><CR><LF>
Parameters:
mac_address: MAC assress of STA, example: D8B0CFFF1234
5.3.1.21. AT+WSLK
Function: Query the wireless link status of STA
Format:
Query
AT+ WSLK<CR>
+ok=<ret><CR><LF><CR><LF>
Parameters:
ret
If no link, reply “Disconnected”
If link, reply “SSID(MAC) of AP”
If wireless is closed, reply “RF Off”
5.3.1.22. AT+WSLQ
Function: Query the wireless signal strength of STA
Format:
Query
AT+ WSLQ<CR>
+ok=<ret><CR><LF><CR><LF>
Parameters:
ret
If no link, reply “Disconnected”
If link, reply signal strength of AP
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5.3.1.23. AT+WSCAN
Function: Scan AP
Format:
Query
AT+ WSCAN<CR>
+ok=<LF><CR>Ch,SSID,BSSID,Security,Indicator<LF><CR><ap_site_1><LF><CR><ap_site_2
><LF><CR><ap_site_3><LF><CR>...<ap_site_N><LF><CR><CR><LF>
Parameters:
ap_site_N: the AP site that scanned, format is <Ch,SSID,BSSID,Security,Indicator>
Ch: channel no. of WiFi network
SSID: SSID of router
BSSID: MAC address of router
Security: security mode of router
Indicator: signal strength
Example: “11,TP_LINK_USR,D8:15:0D:C6:3E:14,WPA2PSK/AES,76”
5.3.1.24. AT+WSDNS
Function: Query/Set DNS server address in STA mode, static
Format:
Query
AT+WSDNS<CR>
+ok=<address><CR><LF><CR><LF>
Set
AT+ WSDNS =<address><CR>
+ok<CR><LF><CR><LF>
Parameters:
address: DNS server address in STA
5.3.1.25. AT+LANN
Function: Query/Set network parameters of AP
Format:
Query
AT+LANN<CR>
+ok=<ipaddress,mask><CR><LF><CR><LF>
Set
AT+ LANN=< ipaddress,mask><CR>
+ok<CR><LF><CR><LF>
Parameters:
ipaddress: IP address in AP mode
mask: subnet mask in AP mode
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5.3.1.26. AT+WAP
Function: Query/Set WiFi settings of AP
Format:
Query
AT+WAP<CR>
+ok=< wifi_mode,ssid,channel ><CR><LF><CR><LF>
Set
AT+ WAP =<wifi_mode,ssid,channel ><CR>
+ok<CR><LF><CR><LF>
Parameters:
wifi_mode: Wi-Fi mode, including
11B
11BG
11BGN (default)
ssid: SSID in AP mode
channel: Wi-Fi channel
Select AUTO or CH1~CH11, default CH6
5.3.1.27. AT+WAKEY
Function: Query/Set encryption of AP
Format:
Query
AT+WAKEY<CR>
+ok=<auth,encry,key><CR><LF><CR><LF>
Set
AT+ WAKEY=< auth,encry,key><CR>
+ok<CR><LF><CR><LF>
Parameters:
auth: authentication type, including
OPEN
WPA2PSK
encry: encryption type, including
NONE: valid when “auth=OPEN”
AES: valid when “auth=WPA2PSK”
key: password, in ASCII, less than 64bytes and greater than 8 bytes
5.3.1.28. AT+WALK
Function: Query the MAC address of STA device, which linked to module
Format:
Query
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AT+WALK<CR>
+ok=<status><CR><LF><CR><LF>
Parameters:
status: the MAC address of STA device, which linked to module
No Connection: no STA devices linked to module AP
5.3.1.29. AT+PLANG
Function: Query/Set language of webpage
Format:
Query
AT+PLANG<CR>
+ok=<language><CR><LF><CR><LF>
Set
AT+PLANG =<language><CR>
+ok<CR><LF><CR><LF>
Parameters:
language: language of webpage
CN Chinese(default)
EN English
5.3.1.30. AT+DTDDIS
Function: Open/Close function of send D2D registration packet
Format:
Query
AT+DTDDIS<CR>
+ok=<status><CR><LF><CR><LF>
Set
AT+DTDDIS=<status><CR>
+ok<CR><LF><CR><LF>
Parameters:
status:
on: open
off: close
Note: we no longer recommend this function now.
5.3.1.31. AT+DTDID
Function: Query/Set registration ID of D2D
Format:
Query
AT+DTDID<CR>
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+ok=<id><CR><LF><CR><LF>
Set
AT+DTDID=<id><CR>
+ok<CR><LF><CR><LF>
Parameters:
id: registration ID, range from 1~65535
Note: we no longer recommend this function now.
5.3.1.32. AT+WRMID
Function: Set module ID
Format:
Set
AT+ WRMID =<wrmid><CR><LF><CR><LF>
+ok<CR><LF><CR><LF>
Parameters:
wrmid: set module ID, in 20 characters
5.3.1.33. AT+ASWD
Function: Query/Set module search password
Format:
Query
AT+ ASWD <CR>
+ok=<aswd><CR><LF><CR><LF>
Set
AT+ASWD =<aswd><CR><LF><CR><LF>
Parameters:
aswd: module search password
5.3.1.34. AT+SMTLK
Function: start Simplelink function
Format:
Query
AT+SMTLK<CR>
Smartlink function us used to connect module to router easily. When function on, module work in this
mode, led lights quickly and waiting for the APP to push configuration information
5.3.1.35. AT+USERVER
Function: Query user version and edit time
Format:
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AT+USERVER<CR>
+ok=<user_version,generated_time><CR><LF><CR><LF>
Parameters:
user_version:
V1.1
generated_time: edit time
2014-08-15 10:15
5.3.1.36. AT+RPTMAC
Function: Query whether report MAC
Format:
AT+RPTMAC<CR>
+ok=<status><CR><LF><CR><LF>
Parameters:
status:
ON: open
OFF: closed
5.3.1.37. AT+WRRPTMAC
Function: Set whether report MAC
Format:
AT+WRRPTMAC=<status><CR>
+ok<CR><LF><CR><LF>
Parameters:
status:
ON: open
OFF: closed
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6. Contact Us
Company: Jinan USR IOT Technology Limited
Address: Floor 11, Building1, No.1166 Xinluo Street, Gaoxin Distric, Jinan, Shandong, 250101, China
Tel: 86-531-55507297, 86-531-88826739
Web: http://www.usriot.com
Support : http://h.usriot.com
Email: sales@usriot.com
7. Disclaimer
This document provide the information of USR-C215 products, hasn’t been granted any theintellectual
property license by forbid speak or other ways either explicitly or implicitly. Except for the duty of sales
conditions and conditional declarations, we don’t take any other responsibilities. We don’t warrant the products
sales and use explicitly or implicitly, including particular purpose merchantability and marketability, the tort
liability of any other patent right, copyright, intellectual property right. We may modify specification and
description at any time without prior notice.
8. Update History
2016-04-29 Establish V1.0
Federal Communication Commission Statement (FCC, U.S.)
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
FCC Caution:
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
IMPORTANT NOTES
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance
20cm between the radiator & your body.
Co-location warning:
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Limited Channels fixed for use in the US:
IEEE 802.11b or 802.11g or 802.11n(HT20) operation of this product in the U.S. is
firmware-limited to Channel 1 through 11. IEEE 802.11n(HT40) operation of this product
in the U.S. is firmware-limited to Channel 3 through 9.
OEM integration instructions:
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20 cm is maintained between the antenna and
users, and the transmitter module may not be co-located with any other transmitter or
antenna. The module shall be only used with the external antenna(s) that has been
originally tested and certified with this module.
As long as 3 conditions above are met, further transmitter test will not be required.
However, the OEM integrator is still responsible for testing their end-product for any
additional compliance requirements required with this module installed (for example,
digital device emissions, PC peripheral requirements, etc.).
Validity of using the module certification:
In the event that these conditions cannot be met (for example certain laptop
configurations or co-location with another transmitter), then the FCC authorization for this
module in combination with the host equipment is no longer considered valid and the
FCC ID of the module cannot be used on the final product. In these circumstances, the
OEM integrator will be responsible for re-evaluating the end product (including the
transmitter) and obtaining a separate FCC authorization.
End product labeling:
This transmitter module is authorized only for use in device where the antenna may be
installed such that 20 cm may be maintained between the antenna and users. The final
end product must be labeled in a visible area with the following: “Contains Transmitter
Module FCC ID: 2AJDA-USR-C215A”.
Information that must be placed in the end user manual:
The OEM integrator has to be aware not to provide information to the end user regarding
how to install or remove this RF module in the user's manual of the end product which
integrates this module. The end user manual shall include all required regulatory
information/warning as show in this manual.