Hangzhou Tuya Information Technology WR4 Wi-Fi Module User Manual WR4

Hangzhou Tuya Information Technology Co.,Ltd Wi-Fi Module WR4

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User Manual

WR4DATASHEET

Tuya Smart Wi-Fi Module

1. Product Overview

WR4 is a low power consumption module with built-in connectivity solution designed by

Hangzhou Tuya Information Technology Co., Ltd.The Wi-Fi Module consists of a highly

integrated wireless radio chip W302 12E77H2 and some extra flash that has been programed with

Wi-Fi network protocol and plenty of software examples.WR4 includea ARM CM4F,WLAN

MAC,1T1R WLAN,maximum frequency reaches 125MHz,256K SRAM,2M byte flash and

various peripheral resources.

WR4 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.

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 : 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

+24.5 dBm output power

Support SmartConfig function for both Android and IOS devices

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External IPEX connecter antenna

Operating temperature range: -20℃ to 85℃

1.2 Main ApplicationFields

Intelligent Building

Intelligent home, Intelligent household applications

Healthy devices

Industrial wireless control

Baby monitor

Webcam

Intelligent bus

WR4DATASHEET

2. Dimensions and Footprint

2.1Dimensions

WR4 has 2 columns of Pins (2*8).The distance between each Pin is 1.5 mm.

Size of WR4: 13.8mm(W)*15.5mm(L)*3.3mm(H)

Figure 2 shows the dimensions of WR4.

Figure 2. The dimensions of WR4

2.2 Pin Definition

Table 1 shows the generalpin attributes of WR4

Table 1. The typical pin definitionof WR4

PIN

NO.

NAMETYPEDISCREPTION

1NC/ NC，No Connect

2ADCAIADCterminal(input5Vmaximally)

3ENI/OExternalresetsingal(lowleveleffects)

4A_19 I/O GPIOA_19

5A_12 I/O GPIOA_12

6A_0 I/O GPIOA_0,cannotbepull‐upwhilebooting,canbeusedasGPIO

whileinnormalworkingmode

7A_5 I/OGPIOA_15

83.3V I/OSupplyvoltage(3.3V)

9GND I/OGround

10A_23 I/OUART0_TXD

WR4DATASHEET

11A_18 I/OUART0_RXD

12A_22 I/OGPIOA_22

13A_15 I/OGPIOA_15

14A_14 I/OGPIOA_14

15A_29 I/OUART_Log_RXD(usedtoprintmodule'sinternalinformation)

16A_30 I/OUART_Log_TXD(usedtoprintmodule'sinternalinformation)

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

WR4DATASHEET

3. Electrical Characteristics

3.1 Absolute Maximum Ratings

Table 3.1. Absolute Maximum Ratings

PAR AM ETERSDESCRIPTIONMINMAXUNIT

TsStoragetemperature‐40105℃

VCCSupplyvoltage ‐0.3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

PAR AM ETERSDESCRIPTIONMINTYPICAL MAXUNIT

TaWorkingtemperature ‐20 ‐85℃

VCCWorkingvoltage3‐3.6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 +20.18dBm287mA

IRF11g6Mbps+24.17dBm255mA

IRF11 

n-HT20 MCS0 +23.30dBm244mA

IRF 

11n-HT40

MCS0+22.97dBm220mA

WR4DATASHEET

3.4 Wi-Fi Receiving CurrentConsumptions

Table 3.4. Wi-Fi RX currentconsumption

PAR AM ETERS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WR4isunderEZparingmode,Wi‐Fiindicator

lightflashesquickly

115 130 mA

StandbyModeWR4isconnected,Wi‐Fiindicatorlightison50 110 mA

OperationModeWR4isconnected,Wi‐Fiindicatorlightison120 265 mA

Disconnection

Mode

WR4isdisconnected,Wi‐Fiindicatorlightisoff 35 90 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

PAR AM ETERSDESCRIPTION

Frequencyband2.412GHzto2.462GHz

Wi‐Fistandard

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



U.FLRFexternalconnector

IEEE802.11n20/n40/g/b(Terminal1‐11)

WR4DATASHEET

PAR AM ETERSMIN TYPICALMAXUNI

T

RFpeakoutputpower,802.11bCCKMode11M‐ 17.5‐dBm

RFpeakoutputpower,802.11gOFDMMode54M‐ 14.5‐dBm

RFpeakoutputpower,802.11nOFDMModeMCS7‐ 13.5‐dBm

TheFrequencyerror ‐10‐ 10ppm

4.3Wi-Fi Receiving Sensitivity

Table 4.3. Wi-Fi Receiving sensitivity

4.2Wi-Fi TransmittingPower

Table 4.2. Wi-Fi transmitting power

PAR AM ETERSMIN TYPICALMAXUNI

T

RFpeak outputpower,802.11bCCKMode1M ‐20.18‐dBm

RFpeakoutputpower,802.11gOFDMMode6M ‐21.41‐dBm

RFpeakoutputpower,802.11n20OFDMMode MCS0‐ 22.30‐dBm

RFpeakoutputpower,802.11n40OFDMMode MCS0‐ 21.45‐dBm

TheFrequencyerror 10‐‐ 10ppm

WR4DATASHEET

5. Antenna Information

5.1 Antenna Type

External antenna and the FPC antenna is recommended.

Figure 5.1. recommended antenna size

5.2 U.FL RF connector

The parameter for U.FL RF connector is shown below:

WR4DATASHEET

6. Packaging Information And Production Guide

6.1 Mechanical Dimensions

Figure 6.1. Top view of the module

6.2PCBRecommended Package

Figure 6.2 PCB schematic Drawing

6.3 Production Guide

The storage for the delivered module should meet the following condition:

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

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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 6.3. 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-WR4”,or “Contains FCC ID: 2ANDL-WR4”, Any

similar wording that expresses the same meaning may be used.

Hangzhou Tuya Information Technology WR4 Wi-Fi Module User Manual WR4

Hangzhou Tuya Information Technology Co.,Ltd Wi-Fi Module WR4

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