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

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

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User Manual

WR3DATASHEET

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

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

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WR3DATASHEET

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.

NAMETYP

E

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_1

9

I/OGPIOA_19

5GPIOA_1

4

I/OGPIOA_14,hardwarePWM

6GPIOA_1

5

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_2

9

I/OUART_Log_RXD(usedtoprintmodule'sinternalinformation)

12GPIOA_3

0

I/OUART_Log_TXD(usedtoprintmodule'sinternalinformation)

13GPIOA_5I/OGPIOA_5,hardwarePWM

14GPIOA_1

2

I/OGPIOA_12,hardwarePWM

15RXDI/OUART0_RXD

16TXDI/OUART0_TXD

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Note: S: Power supply pins; I/O: Digital input or output pins; AI: Analog input.

WR3DATASHEET

3. Electrical Characteristics

3.1 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 Specification

4.1 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UNI

T

WR3DATASHEET

RFaverageoutputpower,802.11bCCKMode1M ‐20.09‐dBm

RFaverageoutputpower,802.11gOFDMMode6M ‐20.06‐dBm

RFaverageoutputpower,802.11n20OFDMMode MCS0‐ 19.99‐dBm

RFaverageoutputpower,802.11n40OFDMMode MCS0‐ 19.76‐dBm

TheFrequencyerror‐10‐ 10ppm

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4.3Wi-Fi Receiving Sensitivity

Table 4.3. Wi-Fi Receiving sensitivity

PARAMETERSMIN TYPICALMAXUNI

T

PER<8%,Receivingsensitivity,802.11bCCKMode1M ‐ ‐91‐dBm

PER<10%,Receivingsensitivity,802.11gOFDMMode 6M ‐ ‐75‐dBm

PER<10%,Receivingsensitivity,802.11nOFDMMode MCS0 ‐ ‐72‐dBm

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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

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Figure 6.2. The module’s mechanical view

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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℃ 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 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.

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

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