WR3LE User Manual
TuyaSmartWi-Fi Module
1. Product Overview
WR3LE 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 RTL8710BX and some extra flash that has been programed
with Wi-Fi network protocol and plenty of software examples.WR3LE include a ARM CM4F,
WLAN MAC, 1T1R WLAN, maximum frequency reaches 125MHz, 256K SRAM, 2Mbyte
flash and various peripheral resources.
WR3LE is a RTOS
function examples, users can customize their Wi-Fi product by using these software examples.
1.1 Features
platform, embedded with all the Wi-Fi MAC and TCP/IP protocol
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/WPA
Support Smart Config function for both Android and IOS devices
On-board PCB antenna
Pass CE, FCC, SRRC certifications
Operating temperature range: -20℃ to105℃
2
1.2 Main ApplicationFields
Intelligent Building
Intelligent home, Intelligent household applications
Healthy devices
Industrial wireless control
Baby monitor
Webcam
Intelligent bus
WR3LE User Manual
2. Dimensions an d F oot pr in t
2.1Dimensions
WR3LE has 2 columns of Pins (2*8).The distance between each Pin is2 mm.
Size of WR3LE: 16 mm (W)×24 mm (L) ×3.3 mm (H)
Figure1. dimension Drawing
2.2 Pin Definition
Table 1 shows the generalpin attributes of WR3LE
Table 1. The typical pin definition of WR3LE
PIN
NO.
1
2
NAME TYPE DISCREPTION
NC / Dangling don't pick up, in order to compatible with other
modules
ADC AI
ADC，Max5V
WR3LE User Manual
3
CHIP_EN I/O
4
GPIOA_29 I/O U A RT_Log_RXD GPIO
5
GPIOA_14 I/O
6
GPIOA_15 I/O
7
GPIOA_22 I/O GPIOA_22
8
VCC P
9
GND P
10
GPIOA_0 I/O
11
GPIOA_30 I/O U A RT_Log_TXD GPIO
12 GPIOA_19 I/O GPIOA_19
13 GPIOA_5 I/O
14 GPIOA_12 I/O
15 RXD I/O UART0_RXD
16 TXD I/O UART0_TXD
Note: S: Power supply pins; I/O: Digital input or output pins; AI: Analog input.
GPIOA_14，hardware PWM
GPIOA_15，hardware PWM
（3.3V）
GPIOA_0，HardwarePWM
GPIOA_5，hardware PWM
GPIOA_12，hardware PWM
3. Electrical Characteristics
3.1 Absolute Maximum Ratings
Table 3.1. Absolute Maximum Ratings
PARAMETERS DESCRIPTION MIN MAX UNIT
Ts Storage temperature -40 125
VCC Supply voltage -0.3 3.6 V
Static electricity voltage
(human model)
Static electricity voltage
(machine model)
TAMB-25℃
TAMB-25℃
- 2 KV
- 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 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
℃
℃
WR3LE User Manual
VoH IO high level output VDD*0.8 - V 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
IRF 11b
IRF 11g
IRF 11n bw20
IRF 11n bw40
1Mbps
6Mbps
MCS0
MCS0
Transmitting power
21.54
24.01
23.11
22.36
TYPICAL UNIT
287 mA
267 mA
244 mA
220 mA
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 Current Consumptions
Table 3.5. The module working current consumption
WORK MODE
EZ Mode WR3LE is under EZ paring mode, Wi-Fi indicator
Standby Mode WR3LE is connected, Wi-Fi indicator light is on
Operation Mode WR3LE is connected, Wi-Fi indicator light is on
Disconnection
Mode
Note: peak continuous time is about 5 us.
The parameter shown above will vary depending on different firmware functions.
AT TA = 2 5 ℃
light flashes quickly
WR3LE is disconnected, Wi-Fi indicator light is
off
TYPICAL MAX* UNIT
115 125
60 209
118 198
34 192
mA
mA
mA
mA
WR3LE User Manual
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 802.11n/g/b (Terminal 1-11)
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
RF output power, 802.11b CCK Mode 1M - 21.54 - dBm
RF output power, 802.11g OFDM Mode 6M - 24.01 - dBm
RF output power, 802.11n OFDM Mode MCS0 - 23.11 - dBm
RF output power, 802.11n OFDM Mode MCS0 -
The Frequency error -10 - 10 ppm
Conducted
Peak Output
Power
22.36
MAX UNI
- dBm
T
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 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
WR3LE User Manual
5. Antenna Inf or m at ion
5.1 Antenna Type
Antenna can be 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.
6. Packaging Information And Production Guide
6.1 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.
6.2 Recommended furnace temperature curve
Figure 6.2. PCB Package DrawingRecommended furnace temperature curve
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 3.6V VDC ,typical
value 3.3VDC and the ambient temperature of the module should not exceed 105℃.
This module using only one kind of antennas with maximum gain is 2.5dBi .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.
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-WR3LE ””,or “Contains FCC ID: 2ANDL-WR3LE ”,
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
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 on test modes：
tx_contin_en 1 // return：wifi tx continuous test!
wifitxout < parameter 1> < parameter 2> < parameter 3>
< parameter 1>：Send channel option and allowed number is 1~11.
< parameter 2>：Send data rate option, the relationship between input parameters and
rates is shown in table 1.
< parameter 3>：Send power attenuation
Table 1: allowed input for speed of receiving or sending data package
11b mode 11g mode 11n mode
Input Dial Speed Input Dial Speed Input Dial Speed
0x0 1M 0xb 6M 0x10 6.5M / MCS0
0x1 2M 0xf 9M 0x11 13M / MCS1
0x2 5.5M 0xa 12M 0x12 19.5M / MCS2
0x3 11M 0xe 18M 0x13 26M / MCS3
0x9 24M 0x14 39M / MCS4
0xd 36M 0x15 52M / MCS5
0x8 48M 0x16 58.5M / MCS6
0xc 54M 0x17 65M / MCS7
cmdstop // Stop sending data package command
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.
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
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.
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