WR3 Wi-Fi Module User Manual

WR3DATASHEET TuyaSmartWi-Fi Module 1. Product Overview WR3 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 WR3DATASHEET 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 Industrial wireless control Healthy devices Baby monitor Webcam Intelligent bus WR3DATASHEET 2. Dimensions and Footprint 2.1Dimensions 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. 1 2 NAME NC GPIOA_2 TYP E

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I/O DISCREPTION NC GPIOA_22 WR3DATASHEET Externalresetsingal(lowleveleffects) GPIOA_19 GPIOA_14,hardwarePWM GPIOA_15,hardwarePWM CHIP_EN GPIOA_1 I/O I/O 9 GPIOA_1 I/O 4 GPIOA_1 I/O 5 GPIOA_0 I/O GPIOA_0, cannotbepullupwhilebooting,canbeusedasGPIO VD33 GND ADC GPIOA_2 9 P P AI I/O whileinnormalworkingmode Supplyvoltage(3.3V) Ground ADCterminal(input5Vmaximumly) UART_Log_RXD(usedtoprintmodule'sinternalinformation) 3 4 5 6 7 8 9 10 11 12 GPIOA_3 I/O UART_Log_TXD(usedtoprintmodule'sinternalinformation) 0 GPIOA_5 GPIOA_1 2 RXD TXD I/O I/O I/O I/O 13 14 15 16 GPIOA_5,hardwarePWM GPIOA_12,hardwarePWM UART0_RXD UART0_TXD Note: S: Power supply pins; I/O: Digital input or output pins; AI: Analog input. WR3DATASHEET 3. Electrical Characteristics 3.1 Absolute Maximum Ratings Table 3.1. Absolute Maximum Ratings DESCRIPTION Storagetemperature Supplyvoltage TAMB25 MIN 20 3.0 MAX 105 3.6 2 UNIT V KV TAMB25 0.5 KV PARAMETERS Ts VCC Staticelectricityvoltage

(humanmodel) Staticelectricityvoltage

(machinemodel) 3.2 Electrical Conditions Table 3.2. Electrical Conditions PARAMETERS DESCRIPTION Ta VCC VIL VIH VOL VoH Imax Cpad Workingtemperature Workingvoltage IOlowlevelinput IOhighlevelinput IOlowleveloutput IOhighleveloutput IOdrivecurrent Inputcapacitor MIN 20 3 0.3 VCC*0.75 VCC*0.8 3.3 Wi-Fi Transmitting Current Consumptions 3.3 TYPICAL MAX 105 3.6 VCC*0.25 VCC VCC*0.1 VCC 16 2 UNIT V V V V V mA pF Table 3.3. Wi-Fi TX current consumption Transmittingpower PARAMETERS IRF IRF IRF IRF MODE 11b 11g 11nHT20 11nHT40 RATE 1Mbps 6Mbps MCS0 MCS0

+20.09dBm

+20.06dBm

+19.99dBm

+19.76dBm TYPICAL 287 255 244 220 UNIT mA mA mA mA WR3DATASHEET 3.4 Wi-Fi Receiving CurrentConsumptions Table 3.4. Wi-Fi RX currentconsumption PARAMETERS IRF IRF MODE CPUsleep CPUactive TYPICAL 90 120 UNIT mA mA 3.5 Working Mode CurrentConsumptions Table 3.5. The module working currentconsumption WORKMODE ATTA=25 EZMode WR3isunderEZparingmode,WiFiindicator lightflashesquickly TYPICAL MAX* UNIT 121.8 141 mA StandbyMode WR3isconnected,WiFiindicatorlightison 52 OperationMode WR3isconnected,WiFiindicatorlightison Disconnection Mode WR3isdisconnected,WiFiindicatorlightisoff 180 46 Note: peak continuous time is about 5us. 125 312 120 mA mA mA The parameter shown above will vary dependingon different firmware functions. 4. WLAN Radio Specification 4.1 Basic Radio Frequency Characteristics Table 41.Basic Radio frequency characteristics PARAMETERS Frequencyband WiFistandard Datatransmittingrate Antennatype DESCRIPTION 2.412GHzto2.462GHz IEEE802.11n20/g/b(Terminal111),802.11n40(Terminal 1-7) 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 OnboardPCBAntenna 4.2Wi-Fi TransmittingPower Table 4.2. Wi-Fi transmitting power PARAMETERS MIN TYPICAL MAX UNI T WR3DATASHEET 1M RFaverageoutputpower,802.11bCCKMode RFaverageoutputpower,802.11gOFDMMode 6M RFaverageoutputpower,802.11n20OFDMMode MCS0 RFaverageoutputpower,802.11n40OFDMMode MCS0 TheFrequencyerror 10 20.09 20.06 19.99 19.76 10 dBm dBm dBm dBm ppm 4.3Wi-Fi Receiving Sensitivity Table 4.3. Wi-Fi Receiving sensitivity PARAMETERS PER<8%,Receivingsensitivity,802.11bCCKMode PER<10%,Receivingsensitivity,802.11gOFDMMode PER<10%,Receivingsensitivity,802.11nOFDMMode MCS0 1M 6M MIN TYPICAL MAX UNI T dBm dBm dBm 91 75 72 WR3DATASHEET 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, its recommended to keep a minimum15mm distance between the antenna part and the other metal pieces. Users own PCBA design is recommended NOT to pass any wire, NOT do copper pour under the region of the modules antenna, to avoid interferences. WR3DATASHEET 6. Packaging Information And Production Guide 6.1 Mechanical Dimensions Figure 6.1. Top view of the module Figure 6.2. The modules mechanical view 6.2PCBRecommended Package Figure 6.3. PCB schematic Drawing WR3DATASHEET Figure 6.3. PCB footprint 6.3 Production Guide The storage for the delivered module should meet the following condition:

WR3DATASHEET 1. The anti-moisture bag should be kept in the environment withtemperature< 30 and humidity< 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 users 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.