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

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Document ID	4015611
Application ID	WHwH7FK+tnt+Tqq72+sa8Q==
Document Description	User Manual
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Document Type	User Manual
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Date Submitted	2018-09-21 00:00:00
Date Available	2018-09-21 00:00:00
Creation Date	2018-09-05 11:51:02
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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
WR4 DATASHEET


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
NC
NC，No Connect
ADC
AI
ADC terminal(input 5V maximally)
EN
I/O
External reset singal(low level effects)
A_19
I/O
GPIOA_19
A_12
I/O
GPIOA_12
A_0
I/O
GPIOA_0, can not be pull‐up while booting, can be used as GPIO
while in normal working mode
A_5
I/O
GPIOA_15
3.3V
I/O
Supply voltage (3.3V)
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
PARAMETERS
DESCRIPTION
MIN
MAX
UNIT
Ts
Storage temperature
‐40
105
℃
VCC
Supply voltage
‐0.3
3.6
Static electricity voltage
(human model)
TAMB‐25℃
‐
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
‐
3.6
VIL
IO low level input
‐0.3
‐
VCC*0.25
VIH
IO high level input
VCC*0.75
‐
VCC
VOL
IO low level output
‐
‐
VCC*0.1
VoH
IO high level output
VCC*0.8
‐
VCC
Imax
IO drive current
‐
‐
16
mA
Cpad
Input capacitor
‐
‐
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
IRF
11n-HT20
MCS0
MCS0
+23.30dBm
+22.97dBm
244
220
mA
mA
11n-HT40
WR4 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=25℃
TYPICAL
MAX*
EZ Mode
UNIT
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
PARAMETERS
Frequency band
Wi‐Fi standard
Data transmitting rate
DESCRIPTION
2.412GHz to 2.462GHz
IEEE 802.11n20/n40/g/b (Terminal 1‐11)
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
WR4 DATASHEET
4.2Wi-Fi TransmittingPower
Table 4.2. Wi-Fi transmitting power
PARAMETERS
MIN
TYPICAL
MAX
UNI
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
‐10
‐
10
ppm
‐10
‐
10
ppm
The Frequency error
Table 4.3. Wi-Fi Receiving sensitivity
4.3Wi-Fi Receiving Sensitivity
The Frequency error
RF peak output power, 802.11n OFDM Mode
MCS7
‐
13.5
‐
dBm
RF peak output power, 802.11g OFDM Mode
54M
‐
14.5
‐
dBm
RF peak output power, 802.11b CCK Mode
11M
‐
17.5
‐
dBm
MAX
UNI
PARAMETERS
MIN
TYPICAL
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
WR4 DATASHEET
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.

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Create Date                     : 2018:09:05 11:51:02+08:00
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