WIFI Module C32 Series

[USR-C322] Industrial Low Power TI CC3200 Wifi Module with Internal/External Antenna

Serial UART to WIFI Bi-directional Transmission


USR-C322 is a wifi module released by USR IOT,which has the features of minisize,low power and industry-grade. The hardware of USR-C322 wifi module integrates MAC,baseband chip, RF transceiver unit and power amplifier.

USR-C322 wifi module adopts CC3200 chip of TI,which has industrial ARM Cortex-M4 core and ultra-low power operation mechanism.And it supports WiFi protocol and TCP/IP protocol.User can achieve the function of UART devices connecting to Internet with simple configuration.

TI CC3200 ChipLow PowerMinisize


USR-C322 Evaluation Board : USR-C322-EVK


  • TI CC3200 Chip:TI chips;quality and delivery are guaranteed;based on ARM Cortex-M4 kernel;running frequency of 80 MHZ
  • Ultra-low power:  Working : Min 3.5mA; Deep Sleep : Min 25uA
  • Open SDK:Support secondary development according to TI SDK and „USR“ encapsulated SDK (C322 SDK is available in May,2015.)
  • Minisize: 18.22*26.65*2.8(mm)
  • High-speed UART:Max baud rate of 3M bps
  • Simplelink:one key access to WiFi
  • Double serials : two UARTs
  • Three links : three TCP links
  • Two encryption communication methods : PC1 Encrypt,SSL encryption submission
  • More functions : custom webpage,websocket,httpd client
  • No data loss


23054242_59430C322 supports five power modes,which has Min.3.5mA standby power and has Min.25uA deep sleep power.Its power control can be the highest level.


23055316_67474The above is function structure chart of C322 firmware V2.0.Blue part is for original function, orange for new features of V2.0. New features of firmware V2.0 includes double serial,three links,PC1 Encrypt,SSL encryption submission,http and Websocket communication mode.

23055803_72677C322 has double serials and three network links.
UART 0 supports two network links and one link supports TCP Server;UART 1 supports one network link.
Application Example:
1.Communication with two servers:two UARTs connect with two different servers and receive different commands for the servers;
2.Data backup and remote debugging:serial data sent to the two servers by using two network links of UART 0;
3.TCP Server and TCP Client can work at the same time;

Security of Communication Data

Firmware V2.0 has two encryption communication methods:
PC1 Encrypt:wifi module receives data,encrypts the data with PC1 Encrypt and sends the data to server; SSL Client:use SSL Client to submit data to server;

Data Submitted to Web Server Directly

Built-in Webpage with Custom Extensions

C322 built-in webpage supports user-defined functions.
C322 supports function of Ethernet to serial, which adopts HTML5 Websocket technology. Combined with custom webapge function, User can design built-in webpage to realize webpage control and data acquisition according to project requirement.

Function and Detail

  • High-speed Baud Rate : serial baud rate up to 3Mbps; have high speed in large amount of data transmission applications like WIFI printer,WIFI serial camera and WIFI high-speed data acquisition.
  • Onekey WIFI Connection : support two fast networking ways–„SimpleLink“ and „UsrLink“;perfectly solve problems of complex networking operation in smart home applications.
  • RegistryPackage Function : send registry data package immediately after TCP connection,which is convenient for server identifying and processing;registry data package supports custom ID and MAC.
  • Baud Rate Sync : support using USR Visual Serial Software(USR-VCOM).

Outstanding Performance

  • In industrial field:positioning low power and industrial-grade WIFI module; can adapt to industrial environment of – 40 ~ 85 °C; TI’s great repetation also can guarantee the stability of core solutions in industrial environment; Amazing power control can adapt to any requirements.
  • In civilian field:positioning high-end intelligent civil products; support SimpleLink and UsrLink onekey APP networking mode.


System Information
  • Processor : TI CC3200(Cortex-M4 core)
  • Main Frequency: 80MHz
Network Parameter
  • Standard : 802.11 b/g/n
  • Network Mode : AP / Station
  • Access Terminal Quantity in AP Mode : 1
  • Frequency Range : 2.412 GHz ~ 2.484 GHz
Transmit Power
  • 17.0 dBm @ 1 DSSS
  • 17.25 dBm @ 11 CCK
  • 13.5 dBm @ 54 OFDM
Receive Sensitivity
  • –94.7 dBm @ 1 DSSS
  • –87.0 dBm @ 11 DSSS
  • –73.0 dBm @ 54 OFDM
Transmission Rate :
  • 802.11b:11 Mbps
  • 802.11g:54 Mbps
  • 802.11n:54 Mbps
  • Transmission Range : Max 200m (open horizon,3dbi antenna)
Security Mechanism :
  • Security:WEP-A / WPA-PSK / WPA2-PSK
  • Encryption:WEP64 / WEP128 / TKIP / AES
Antenna Interface :
  • External: I-PEX connector
  • Internal: on-board antenna
  • Port Number : 2
  • Interface Standard : TTL:3.3V
  • Data Bits : 5,6,7,8
  • Stop Bit : 1,2
  • Check Bit : None,Even,Odd,Space,Mark
  • Baud Rate : 300 bps ~ 3M bps
  • Flow Control : RTS / CTS
  • Buffer : receive 1K bytes
  • Virtual Serial (USR-VCOM) : Windows 2000 or higher(32bit/64bit)
  • Configuration : built-in webpage,serial AT command,network AT command
  • UsrLink:“USR“ defined module networking mode
  • SimpleLink:onekey networking provided by TI
  • RegistryPackage:connecting or sending data with registration package(Registered package can be set as MAC address or double-byte characters)
  • Baud rate sync
  • Encryption communication
  • Support custom webpage
  • Support Httpd Client and Websocket (Web to Serial)
Basic Parameter
  • Size : 18.22 x 26.65 x 2.8(mm)
  • Operating Temp. : -40 ~ 85°C (industrial)
  • Storage Temp. : -45 ~ 125°C,5 ~ 95% RH(no condensation)
  • Input Voltage : DC 3.0 ~ 3.6 V
  • Working Current : 3.3V :
  • Continuous TX:~75mA
  • Normal Mode:Average: ~18mA,Peak: 200mA
  • Working:3.5mA
  • Deep Sleep:Min 25uA
  • Certificate : CE / FCC,ROHS compliant
  • Warranty : 2 years
User Manual
  • [USR-C322] User Manual V2.3   | download
Development File
  • Fast Networking Protocol (usrlink) Development File | download
  • [Update Tool] USR-C32 Series Update File Tools V1.0  | download
  • [PCB Library] USR-C322 WIFI Module  | download
  • [Development File] SimpleLink Instruction and Demo  | download
  • [SCH] C32 Series Evaluation Kit USR-C322-EVK SCH V1.1 | download
  • [Advanced Function] USR-C322 Advanced Function Instruction and Tools  | download
  • [Custom Web] C32 Series Custom web function User Manual  | download
  • C32 Series SPI Firmware User Manual  | download
Application Software
Product Certificates
  • C32 Series Wifi Module CE FCC RoHS  |  download



Evaluationkit Available