Hangzhou Tuya Information Technology WR2 Wi-Fi Module User Manual

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

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User Manual

WR2DATASHEET

TuyaSmart Wi-Fi Module

1. Product Overview

WR2 is a low power consumption module with built-in Wi-Fi connectivity solution

a highly integrated wireless radio chip W302 12E77H2 and some extra flash that has been

programmed with Wi-Fi network protocol and plenty of software examples.WR2 include a

ARM CM4F, WLAN MAC, 1T1R WLAN, maximum frequency reaches 125MHz, 256K

SRAM, 1M byte flash and various peripheral resources.

WR2 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 range: 3.3V DC

Peripherals: 5 GPIO channels, 1 UART, 1 ADC

Wi-Fi connectivity:

802.11 B/G/N20/N40

Channel 1 to 11@ 2.4GHz

Support WPA/WPA2

+20.11dBm output power in 802.11b mode

Support SmartConfig function for both Android and IOS devices

WR2DATASHEET

On-board PCB antenna

Operating temperature range: -20℃ to 85℃

1.2 Main Application Fields

Intelligent Building

Intelligent home, Intelligent household applications

Healthy devices

Industrial wireless control

Baby monitor

Webcam

Intelligent bus

WR2DATASHEET

2. Dimensions and Footprint

2.1Dimensions

WR2 has 2 columns of Pins. The distance between each Pin is 2 mm.

Size of WR2: 15mm(W)*18mm(L)*3.3mm(H)

Figure 2 shows the dimensions of WR2.

Figure 2. The dimensions of WR2

2.2 Pin Definition

Table 1 shows the general pin attributes of WR2

Table 2.1 The typical pin definition of WR2

PIN

NO.

NAMETYPEDISCREPTION

1VD33PSupplyvoltage(3.3V)

2GPIOA_12 I/O GPIOA_12

3GNDPGround

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

whileinnormalworkingmode

5 GPIOA_18 I/O UART0_RXD

6GPIOA_5 I/O GPIOA_5

7GPIOA_23 I/O UART0_TXD

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

9GPIOA_14 I/O GPIOA_14

10CHIP_ENI/OExternalresetsignal(lowleveleffects)

WR2DATASHEET

11GPIOA_15 I/O GPIOA_15

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

WR2DATASHEET

3. Electrical Characteristics

3.1 Absolute Maximum Ratings

Table 3.1 Absolute Maximum Ratings

PARAMETERSDESCRIPTIONMINMAXUNIT

TsStoragetemperature‐40105℃

VDD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

PARAMETERS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 +20.11dBm287mA

IRF11g6Mbps +20.81dBm255mA

IRF11nHT20 MCS0+20.29dBm244mA

IRF11nHT40 MCS0+19.09dBm220mA

WR2DATASHEET

3.4 Wi-Fi Receiving Current Consumptions

Table 3.4. Wi-Fi RX current consumption

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 current consumption

WORKMODEATTA =25℃TYPICALMAX*UNIT

EZModeWR2isunderEZparingmode,Wi‐Fiindicator

lightflashesquickly

115 130

mA

StandbyModeWR2isconnected,Wi‐Fiindicatorlightison50 110

mA

OperationModeWR2isconnected,Wi‐Fiindicatorlightison120 265

mA

Disconnection

Mode

WR2isdisconnected,Wi‐Fiindicatorlightisoff 35 90

mA

Note: peak continuous time is about 5us.

The parameter shown above will vary depending on different firmware functions.

WR2DATASHEET

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 Receiving Sensitivity

Table 4.2. Wi-Fi Receiving sensitivity

PARAMETERSMIN TYPICALMAXUNI

T

PER<8%,Receivingsensitivity,802.11bCCKMode11M ‐ ‐91‐dBm

PER<10%,Receivingsensitivity,802.11gOFDMMode 54M ‐ ‐75‐dBm

PER<10%,Receivingsensitivity,802.11nOFDMMode MCS7 ‐ ‐72‐dBm

WR2DATASHEET

5. Antenna Information

5.1 Antenna Type

Antenna can be connected using On-board PCB antenna by default.

5.2 Reduce Antenna Interference

While using the On-board PCB antenna, 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.

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

WR2DATASHEET

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 with temperature< 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 Drawing Recommended furnace temperature curve

WR2DATASHEET

Hereby,HangzhouTuyaInformationTechnologyCo.,Ltd,declaresthatthisWi‐FiModuleis

IncompliancewiththeessentialrequirementsandotherrelevantprovisionsofDirective

2014/53/EU.

Thisequipmentshouldbeinstalledandoperatedwithaminimumdistanceof20cmbetweenthe

radiatorandyourbody.

Environmentfriendlydisposal

Youcanhelpprotecttheenvironment!

Pleaseremembertorespectthelocalregulations:handin

thenon‐workingelectricalequipmentstoanappropriate

wastedisposalcentre.

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-WR2”,or “Contains FCC ID:2ANDL-WR2”, Any similar

wording that expresses the same meaning may be used.

Hangzhou Tuya Information Technology WR2 Wi-Fi Module User Manual

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

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