Hangzhou Tuya Information Technology WR3 Wi-Fi Module User Manual WR3 x

Hangzhou Tuya Information Technology Co.,Ltd Wi-Fi Module WR3 x

User Manual

WR3DATASHEETTuyaSmartWi-Fi Module 1. Product OverviewWR3 is a low power consumption module with built-in Wi-Fi connectivity solution designed by Hangzhou Tuya Information Technology Co.,Ltd. The Wi-Fi Module consists of a highly integrated wireless radio chip W302 12E75M2 and some extra flash that has been programed with Wi-Fi network protocol and plenty of software examples.WR3 includea ARM CM4F, WLAN MAC, 1T1R WLAN, maximum frequency reaches 125MHz, 256K SRAM, 1M byte flash and various peripheral resources. WR3 is a RTOS platform, embedded with all the Wi-Fi MAC and TCP/IP protocol function examples, users can customize their Wi-Fi product by using these software examples. Figure 1 shows the block diagramof the WR3. Figure 1. The block diagram of the WR3 1.1 Features Integrated low power consumption 32-bit CPU, also known as application processorBasic frequency of the CPU can support 125 MHzSupply voltage: DC 3.3VPeripherals: 7 GPIO channels, 2 UART, 1 ADCWi-Fi connectivity:802.11 B/G/N20/N40Channel 1 to 11 @ 2.4GHzSupport WPA/WPA2+20.09dBm output power in 802.11b mode
WR3DATASHEET Support SmartConfig function for both Android and IOS devices  On-board PCB antenna  Operating temperature range: -20℃ to 105℃ 1.2 Main ApplicationFields  Intelligent Building  Intelligent home, Intelligent household applications  Healthy devices  Industrial wireless control  Baby monitor  Webcam  Intelligent bus 
WR3DATASHEET2. Dimensions and Footprint2.1Dimensions WR3 has 2 columns of Pins (2*8).The distance between each Pin is 1.5 mm. Size of WR3: 16mm(W)*24mm(L)*3.3mm(H) Figure 2 shows the dimensions of WR3. Figure 2.1. The dimensions of WR3 2.2 Pin Definition Table 1 shows the generalpin attributes of WR3 Table 1. The typical pin definitionof WR3 PINNO.NAMETYPEDISCREPTION1NC/NC2GPIOA_2 I/OGPIOA_22
WR3DATASHEET3CHIP_ENI/OExternalresetsingal(lowleveleffects)4GPIOA_19I/OGPIOA_195GPIOA_14I/OGPIOA_14,hardwarePWM6GPIOA_15I/OGPIOA_15,hardwarePWM7GPIOA_0I/OGPIOA_0,cannotbepull‐upwhilebooting,canbeusedasGPIOwhileinnormalworkingmode8VD33PSupplyvoltage(3.3V)9GNDPGround10ADCAIADCterminal(input5Vmaximumly)11GPIOA_29I/OUART_Log_RXD(usedtoprintmodule'sinternalinformation)12GPIOA_30I/OUART_Log_TXD(usedtoprintmodule'sinternalinformation)13GPIOA_5I/OGPIOA_5,hardwarePWM14GPIOA_12I/OGPIOA_12,hardwarePWM15RXDI/OUART0_RXD16TXDI/OUART0_TXDNote: S: Power supply pins; I/O: Digital input or output pins; AI: Analog input.
WR3DATASHEET3. Electrical Characteristics3.1 Absolute Maximum Ratings Table 3.1. Absolute Maximum Ratings PARAMETERSDESCRIPTIONMINMAXUNITTsStoragetemperature‐20105℃VCCSupplyvoltage 3.03.6VStaticelectricityvoltage(humanmodel)TAMB‐25℃‐ 2KVStaticelectricityvoltage(machinemodel)TAMB‐25℃‐ 0.5KV3.2 Electrical Conditions Table 3.2. Electrical Conditions PARAMETERSDESCRIPTIONMINTYPICAL MAXUNITTaWorkingtemperature ‐20‐ 105℃VCCWorkingvoltage33.6VVILIOlowlevelinput ‐0.3‐ VCC*0.25VVIHIOhighlevelinputVCC*0.75 ‐ VCCVVOLIOlowleveloutput ‐‐VCC*0.1VVoHIOhighleveloutputVCC*0.8‐ VCCVImaxIOdrivecurrent ‐‐16mACpadInputcapacitor ‐2‐pF3.3 Wi-Fi Transmitting Current Consumptions Table 3.3. Wi-Fi TX current consumption PARAMETERSMODERATETransmittingpowerTYPICALUNITIRF11b1Mbps +20.09dBm287mAIRF11g6Mbps +20.06dBm255mAIRF11nHT20 MCS0+19.99dBm244mAIRF11nHT40 MCS0+19.76dBm220mA3.3
WR3DATASHEET3.4 Wi-Fi Receiving CurrentConsumptions Table 3.4. Wi-Fi RX currentconsumption PARAMETERSMODETYPICALUNITIRFCPUsleep90mAIRFCPUactive120mA3.5 Working Mode CurrentConsumptions Table 3.5. The module working currentconsumption WORKMODEATTA =2 5 ℃TYPICALMAX*UNITEZModeWR3isunderEZparingmode,Wi‐Fiindicatorlightflashesquickly121.8141mAStandbyModeWR3isconnected,Wi‐Fiindicatorlightison52125mAOperationModeWR3isconnected,Wi‐Fiindicatorlightison180312mADisconnectionModeWR3isdisconnected,Wi‐Fiindicatorlightisoff 46120mANote: peak continuous time is about 5us. The parameter shown above will vary dependingon different firmware functions. 4. WLAN Radio Specification4.1 Basic Radio Frequency Characteristics Table 41.Basic Radio frequency characteristics PARAMETERSDESCRIPTIONFrequencyband2.412GHzto2.462GHzWi‐FistandardIEEE802.11n20/g/b(Terminal1‐11),802.11n40(Terminal 1-7)Datatransmittingrate11b:1,2,5.5,11(Mbps)11g:6,9,12,18,24,36,48,54(Mbps)11n:HT20,MCS0~711n:HT40,MCS0~7AntennatypeOn‐boardPCBAntenna4.2Wi-Fi TransmittingPower Table 4.2. Wi-Fi transmitting power PARAMETERSMIN TYPICALMAXUNIT
WR3DATASHEETRFaverageoutputpower,802.11bCCKMode1M ‐20.09‐dBmRFaverageoutputpower,802.11gOFDMMode6M ‐20.06‐dBmRFaverageoutputpower,802.11n20OFDMMode MCS0‐ 19.99‐dBmRFaverageoutputpower,802.11n40OFDMMode MCS0‐ 19.76‐dBmTheFrequencyerror‐10‐ 10ppm4.3Wi-Fi Receiving Sensitivity Table 4.3. Wi-Fi Receiving sensitivity PARAMETERSMIN TYPICALMAXUNITPER<8%,Receivingsensitivity,802.11bCCKMode1M ‐ ‐91‐dBmPER<10%,Receivingsensitivity,802.11gOFDMMode 6M ‐ ‐75‐dBmPER<10%,Receivingsensitivity,802.11nOFDMMode MCS0 ‐ ‐72‐dBm
WR3DATASHEET5. Antenna Information 5.1 Antenna Type Antenna connectedusing On-board PCB antenna. 5.2 Reduce Antenna Interference While using the On-board PCBantenna, in order to have the best Wi-Fi performance, it’s recommended to keep a minimum15mm distance between the antenna part and the other metal pieces. User’s own PCBA design is recommended NOT to pass any wire, NOT do copper pour under the region of the module’s antenna, to avoid interferences.
WR3DATASHEET6. Packaging Information And Production Guide 6.1 Mechanical Dimensions Figure 6.1. Top view of the module Figure 6.2. The module’s mechanical view 6.2PCBRecommended Package Figure 6.3. PCB schematic Drawing
WR3DATASHEETFigure 6.3. PCB footprint 6.3 Production Guide The storage for the delivered module should meet the following condition:
WR3DATASHEET1. The anti-moisture bag should be kept in the environment withtemperature< 30℃ andhumidity< 85% RH. 2. The expiration date is 6 months since the dry packaging products was sealed.Cautions:1. All the operators should wear electrostatic ringin the whole process of production.2. While operating, water and dirt should not have any contact with the modules.6.4 Recommended furnace temperature curve Figure 6.4. PCB Package DrawingRecommended furnace temperature curve FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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 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. FCC Label Instructions:The outside of final products that contains this module device must display a label referring to the enclosed module. This exterior label can use wording such as: “Contains Transmitter Module FCC ID:2ANDL-WR3”,or “Contains FCC ID:2ANDL-WR3”, Any similar wording that expresses the same meaning may be used.

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