Hangzhou Tuya Information Technology WRD3L User Manual
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 1 V2.0.1
1 Product Overview
WRD3L is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a
highly integrated RF chip (RDA5981BM) and several peripheral components, with an
embedded Wi-Fi network protocol stack and robust library functions. WRD3L is
embedded with a low-power Arm Cortex-M4 CPU, 2 MB flash memory, and 448 KB static
random-access memory (SRAM), and has extensive peripherals.
WRD3L is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and
TCP/IP protocols. You can develop embedded Wi-Fi products as required.
1.1 Features
Embedded low-power CPU, which can also function as an application processor
⚫ Dominant frequency: up to 160 MHz
Working voltage: 3.0 V to 3.6 V
Peripherals: nine GPIOs, one universal asynchronous receiver/transmitter (UART),
and one analog-to-digital converter (ADC)
Wi-Fi connectivity
⚫ 802.11b/g/n HT20
⚫ 2.4GHz WiFi
⚫ WPA, WPA2, WEP, and TKIP security modes
⚫ Up to +20±3dBm output power
Tuya WRD3L Wi-Fi Module
Version: 2.0.1
Date: 2019-10-15
No.: 0000000001
Global Intelligent Platform
Product
Manual
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 2 V2.0.1
⚫ STA, AP, and STA+AP working modes
⚫ Smart and AP network configuration modes for Android and iOS devices
⚫ Onboard PCB antenna with a gain of 1.0 dBi
⚫ Working temperature: –20°C to +105°C
1.2 Applications
Intelligent building
Smart household and home appliances
Smart socket and light
Industrial wireless control
Baby monitor
Network camera
Intelligent bus
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 3 V2.0.1
2 Change History
No.
Date
Change Description
Version After
Change
1
2019-09-13
This is the first release.
2.0.0
2
2019-10-15
Modified pin numbers and deleted the
architecture diagram.
2.0.1
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 4 V2.0.1
Contents
1 Product Overview ......................................................................................................... 1
1.1 Features .......................................................................................................... 1
1.2 Applications ..................................................................................................... 2
2 Module Interfaces ......................................................................................................... 6
2.1 Dimensions and Footprint ............................................................................... 6
2.2 Interface Pin Definition .................................................................................... 6
2.3 Test Pin Definition ........................................................................................... 8
3 Electrical Parameters ................................................................................................... 8
3.1 Absolute Electrical Parameters ....................................................................... 8
3.2 Electrical Conditions ....................................................................................... 9
3.3 WRD3L TX Power Consumption ................... Error! Bookmark not defined.
3.4 WRD3L RX Power Consumption .................................................................... 9
3.5 Working Current ............................................................................................ 10
4 RF Features ................................................................................................................ 10
4.1 Basic RF Features ........................................................................................ 10
4.2 WRD3L TX Power ......................................................................................... 10
4.3 WRD3L RX Sensitivity .................................................................................. 11
5 Antenna Information ................................................................................................... 11
5.1 Antenna Type ................................................................................................ 11
5.2 Antenna Interference Reduction ................................................................... 11
5.3 Antenna Connector Specifications................................................................ 12
6 Packaging Information and Production Instructions................................................... 12
6.1 Mechanical Dimensions ................................................................................ 12
6.2 Recommended PCB Layout ......................................................................... 13
6.3 Production Instructions ................................................................................. 14
6.4 Recommended Oven Temperature Curve .................................................... 16
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 5 V2.0.1
6.5 Storage Conditions ....................................................................................... 17
7 MOQ and Packing Information ................................................................................... 17
Figures
Figure 1-1 WRD3L architecture .......................................... Error! Bookmark not defined.
Figure 2-1 WRD3L front and rear views .............................................................................. 6
Figure 6-1 WRD3L mechanical dimensions ...................................................................... 12
Figure 6-2 Side view .......................................................................................................... 13
Figure 6-3 WRD3L pins ..................................................................................................... 13
Figure 6-4 Layout of the PCB to which WRD3L applies.................................................... 14
Figure 6-5 HIC for WRD3L ................................................................................................ 15
Tables
Table 2-1 WRD3L interface pins .......................................................................................... 6
Table 2-2 WRD3L test pins .................................................................................................. 8
Table 3-1 Absolute electrical parameters ............................................................................ 8
Table 3-2 Normal electrical conditions ................................................................................. 9
Table 3-3 Power consumption during constant transmission ............ Error! Bookmark not
defined.
Table 3-4 Power consumption during constant receiving .................................................... 9
Table 3-5 WRD3L working current ..................................................................................... 10
Table 4-1 Basic RF features .............................................................................................. 10
Table 4-2 Power during constant transmission.................................................................. 10
Table 4-3 RX sensitivity ..................................................................................................... 11
WRD3L Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 6 V2.0.1
3 Module Interfaces
3.1 Dimensions and Footprint
WRD3L has two rows of pins with a 2 mm pin spacing.
The WRD3L dimensions (H x W x D) are 3.0±0.15 mm x 16±0.35 mm x 24±0.35 mm.
Figure 2-1 shows the WRD3L front and rear views.
Figure 2-1 WRD3L front and rear views
3.2 Interface Pin Definition
Table 2-1 WRD3L interface pins
Pin No.
Symbol
I/O Type
Function
1
nRST
I/O
Hardware reset pin (active at a low level)
2
ADC
AI
ADC pin (See the following Note 2.)
3
NC
Input
Null pin, no internal connection
4
GPIO0
I/O
GPIO_0, which is connected to GPIO0 (pin 36)
on the internal IC
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