User Manual


Users Manual

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                                          WR2E User Manual

                            TuyaSmartWi-Fi Module

1. Product Overview

     WR2E 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 HB140P1 and some extra flash that has been programed with Wi-Fi network
protocol and plenty of software examples.WR2E include a ARM CM4F, WLAN MAC, 1T1R WLAN,
maximum frequency reaches 125MHz, 256K SRAM, 1M byte flash and various peripheral resources.

    WR2E 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.


    Integrated low power consumption 32-bit CPU, also known as application processor
    Basic frequency of the CPU can support 125 MHz
    Supply voltage range: 3V to 3.6V
    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
         Support SmartConfig function for both Android and IOS devices

         On-board PCB antenna

         Pass CE, FCC, SRRC certifications
         Operating temperature range: -20℃ to 85℃

    Main ApplicationFields

    Intelligent Building
    Intelligent home, Intelligent household applications
    Healthy devices
    Industrial wireless control
    Baby monitor
    Webcam
    Intelligent bus

                                           WR2E User Manual

2. Dimensions and Footprint


      WR2E has 2 columns of Pins (2*9).The distance between each Pin is 2 mm.
      Size of WR2E: 15 mm (W)×18 mm (L) ×3.3 mm (H)

2.2 Pin Definition

      Table 1 shows the general pin attributes of WR2E
                               Table 1. The typical pin definition of WR2E
PIN        NAME        TYP                                   DISCREPTION
NO.                     E
 1       VD33            P     3.3V
 2       GPIOA_1        I/O    GPIOA_12,general GPIO,hardware PWM
 3       GND             P     Power supply
 4       GPIOA_1        I/O    GPIOA_19,general GPIO
 5       GPIOA_1        I/O    UART0_RXD
 6       GPIOA_5        I/O    GPIOA_5,general GPIO,hardware PWM
 7       GPIOA_2        I/O    UART0_TXD
 8       ADC            AI     ADC port,Max5V
 9       GPIOA_1        I/O    GPIOA_14 ,General GPIO,hardware PWM
 10      CHIP_EN        I/O    External can make reset pin (effective) low level
 11      GPIOA_1        I/O    GPIOA_15,General GPIO,hardware PWM

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

                                               WR2E User Manual

3. Electrical Characteristics

 Absolute Maximum Ratings

                                      Table 3.1. Absolute Maximum Ratings
            PARAMETERS                           DESCRIPTION                    MIN         MAX    UNIT
                   Ts                        Storage temperature                ‐40          105    ℃
                 VCC                             Supply voltage                 ‐0.3         3.6    V
       Static electricity voltage                  TAMB‐25℃                      ‐            2    KV
            (human model)
       Static electricity voltage                  TAMB‐25℃                      ‐           0.5   KV
           (machine model)

 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              ‐          VDD*0.25     V
VIH                IO high level input                    VDD*0.75          ‐          VDD          V
VOL                IO low level output                    ‐                 ‐          VDD*0.1      V
VoH                IO high level output                   VDD*0.8           ‐          V            V
Imax               IO drive current                       ‐                 ‐          16           mA
Cpad               Input capacitor                        ‐                 2          ‐            pF

                                            WR2E User Manual

 Wi-Fi Receiving CurrentConsumptions

                                 Table 3.3. Wi-Fi RX currentconsumption
PARAMETERS             MODE              TYPICAL         UNIT
     IRF             CPU sleep              90            mA
     IRF             CPU active            120            mA

 Working Mode CurrentConsumptions

                            Table 3.4. The module working currentconsumption
WORK MODE         AT TA=25℃                                                 TYPICAL    MAX*      UNIT

EZ Mode           WR2E is under EZ paring mode, Wi‐Fi indicator                 115     125      mA
                  light flashes quickly
Standby Mode      WR2E is connected, Wi‐Fi indicator light is on                60      209      mA

Operation Mode    WR2E is connected, Wi‐Fi indicator light is on                118     198      mA
Disconnection     WR2E is disconnected, Wi‐Fi indicator light is                34      192      mA
Mode              off
    Note: peak continuous time is about 5us.
          The parameter shown above will vary dependingon different firmware functions.

4. WLAN Radio Specification

 Basic Radio Frequency Characteristics

                              Table 4.1.Basic Radio frequency characteristics
           PARAMETERS                                           DESCRIPTION
           Frequency band                2412MHz-2462MHz(802.11b/g/n20);2422MHz-2452MHz(802.11n40)

           Wi‐Fi standard                           IEEE 802.11n/g/b (Terminal 1‐11)
      Data transmitting rate                              11b:1,2,5.5,11(Mbps)
            Antenna type                                 On‐board PCB Antenna

                                       WR2E User Manual

 Wi-Fi TransmittingPower
                                Table 4.2. Wi-Fi transmitting power

                                           RF output power


 Wi-Fi Receiving Sensitivity

                              Table 4.3. Wi-Fi Receiving sensitivity
                      PARAMETERS                                       MIN   TYPICAL   MAX   UNI
 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

                                      WR2E User Manual

5. Antenna Information

  Antenna Type

    On-board PCB antenna.

  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

                                          WR2E User Manual

6. Packaging Information And Production Guide

  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
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.

  Recommended furnace temperature curve

                Figure 6.2. PCB Package DrawingRecommended furnace temperature curve

                                         WR2E User Manual

Regulatory Module Integration Instructions

2.2 List of applicable FCC rules

  This device complies with part 15.247 of the FCC Rules.

2.3 Summarize the specific operational use conditions

This module can be used in household electrical appliances as well as lighting equipments.

The input voltage to the module should be nominally 3.0 to 3.6VDC ,typical value

3.3VDC and the ambient temperature of the module should not exceed 85℃.

This module using only one kind of antennas with maximum gain is 2.5 dBi .Other antenna

arrangement is not covered by this certification.

The antenna is not field replaceable. If the antenna needs to be changed, the certification

should be re-applied.

2.4 Limited module procedures

 Not applicable

2.5 Trace antenna designs

 Not applicable

2.6 RF exposure considerations

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. If the device built into a host as a portable usage,

the additional RF exposure evaluation may be required as specified by§ 2.1093.

                                       WR2E User Manual

2.7 Antennas

  Module only contains one PCB antenna. No additional external connectors.

2.8 Label and compliance information

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-WR2E ”,or “Contains FCC ID: 2ANDL-WR2E ”, Any

similar wording that expresses the same meaning may be used.

2.9 Information on test modes and additional testing requirements

  a) The modular transmitter has been fully tested by the module grantee on the required

  number of channels, modulation types, and modes, it should not be necessary for the

  host installer to re-test all the available transmitter modes or settings. It is

  recommended that the host product manufacturer, installing the modular transmitter,

 perform some investigative measurements to confirm that the resulting composite

  system does not exceed the spurious emissions limits or band edge limits (e.g., where a

  different antenna may be causing additional emissions).

  b) The testing should check for emissions that may occur due to the intermixing of

  emissions with the other transmitters, digital circuitry, or due to physical properties of

  the host product (enclosure). This investigation is especially important when integrating

  multiple modular transmitters where the certification is based on testing each of them in

  a stand-alone configuration. It is important to note that host product manufacturers

  should not assume that because the modular transmitter is certified that they do not

                                          WR2E User Manual

  have any responsibility for final product compliance.

  c) If the investigation indicates a compliance concern the host product manufacturer is

  obligated to mitigate the issue. Host products using a modular transmitter are subject to

  all the applicable individual technical rules as well as to the general conditions of

  operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of

  the host product will be obligated to stop operating the device until the interference has

  been corrected

  Below are steps for TX verification:

    wpriv mp_start    //enter MP mode

    iwpriv mp_channel 1      //set channel to 1 . 2, 3, 4~11 etc.

    iwpriv mp_bandwidth 40M=0,shortGI=0          //40M=0 set 20M mode and long GI,

                                              40M=1 set 40M mode

    iwpriv mp_ant_tx a      //select antenna A for operation

    iwpriv mp_txpower patha=44,pathb=44            //set path A and path B Tx power level

    iwpriv mp_rate 108               //set OFDM data rate to 54Mbps,ex:

    CCK 1M = 2, CCK 5.5M = 11, KK, OFDM54M = 108 N Mode: MCS0 = 128, MCS1

    = 129…..etc.

    iwpriv mp_ctx background,pkt           //start packet continuous Tx

    iwpriv mp_ctx stop           //stop continuous Tx
2.10 Additional testing, Part 15 subpart B disclaimer

The final host / module combination need to be evaluated against the FCC Part 15B

criteria for unintentional radiators in order to be properly authorized for operation as a Part

15 digital device.

                                            WR2E User Manual

The host integrator installing this module into their product must ensure that the final

composite product complies with the FCC requirements by a technical assessment or

evaluation to the FCC rules, including the transmitter operation and should refer to

guidance in KDB 996369.

Frequency spectrum to be investigated

For host products with certified modular transmitter, the frequency range of investigation

of the composite system is specified by rule in Sections 15.33(a)(1) through (a)(3), or the

range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the

higher frequency range of investigation.

Operating the host product

When testing the host product, all the transmitters must be operating.The transmitters can

be enabled by using publicly-available drivers and turned on, so the transmitters are

active. In certain conditions it might be appropriate to use a technology-specific call box

(test set) where accessory devices or drivers are not available.

When testing for emissions from the unintentional radiator, the transmitter shall be placed

in the receive mode or idle mode, if possible. If receive mode only is not possible then, the

radio shall be passive (preferred) and/or active scanning. In these cases, this would need

to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the

unintentional radiator circuitry is enabled. Testing laboratories may need to add

attenuation or filters depending on the signal strength of any active beacons (if applicable)

from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further

                                        WR2E User Manual

general testing details.

The product under test is set into a link/association with a partnering WLAN device, as per

the normal intended use of the product. To ease testing, the product under test is set to

transmit at a high duty cycle, such as by sending a file or streaming some media content.

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

Document Created: 2019-06-07 05:53:42
Document Modified: 2019-06-07 05:53:42

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