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WRD2L Datasheet

Hangzhou Tuya Information Technology Co., Ltd.

V1.0.0

1. Product Overview

WRD2L 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. WRD2L is

embedded with a low-power Arm Cortex-M4 MCU, 2 MB flash memory, and 384 KB static

random-access memory (SRAM), and has extensive peripherals.

WRD2L 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 32-bit CPU, which can also function as an application

processor

 Dominant frequency: 160 MHz

 Working voltage: 3.0 V to 3.6 V



Peripherals: five GPIOs and one universal asynchronous receiver/transmitter (UART)

 Wi-Fi connectivity

 802.11b/g/n



2.4 GHz WiFi

 WPA and WPA2 security modes

 Up to +20±3dBm output power



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 2.0 dBi

Tuya WRD2L Wi-Fi Module

No.: 0000000004

Date: 2019-07-26

Product

Manual

Version: 1.0.0

Global Intelligent Platform

Summary of content (19 pages)

PAGE 1
Global Intelligent Platform WRD2L Datasheet Tuya WRD2L Wi-Fi Module Product Manual Version: 1.0.0 Date: 2019-07-26 No.: 0000000004 1. Product Overview WRD2L 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.
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WRD2L Datasheet  Working temperature: –40°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 Hangzhou Tuya Information Technology Co., Ltd. 2 V1.0.
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WRD2L Datasheet Change History No. Date Change Description Version After Change 1 2019-09-20 This is the first release. 1.0.0 Hangzhou Tuya Information Technology Co., Ltd. 3 V1.0.
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WRD2L Datasheet Contents 1. Product Overview........................................................................................................................ 1 1.1 Features.............................................................................................................................. 1 1.2 Applications........................................................................................................................ 2 2 Module Interfaces.............................................
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WRD2L Datasheet Tables Table 2-1 WRD2L interface pins.................................................................................................... 6 Table 2-2 WRD2L test pins............................................................................................................. 7 Table 3-1 Absolute electrical parameters..................................................................................... 8 Table 3-2 Normal electrical conditions....................................................
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WRD2L Datasheet 2 Module Interfaces 2.1 Dimensions and Footprint WRD2L has two rows of pins with a 2±0.1 mm pin spacing. The WRD2L dimensions (H x W x D) are 2.8±0.15 mm x 17.3±0.35 mm x 15±0.35 mm. Figure 2-1 shows the WRD2L front and rear views. Figure 2-1 WRD2L front and rear views 2.2 Interface Pin Definition Table 2-1 WRD2L interface pins Pin No.
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WRD2L Datasheet Pin No. Symbol I/O Type Function 4 GPIO23 I/O Hardware PWM pin, which is connected to GPIO23 (pin 33) on the internal IC 5 GPIO22 I/O Hardware PWM pin, which is connected to GPIO22 (pin 34) on the internal IC 6 GND P Power supply reference ground pin 7 3V3 P Power supply pin (3.3 V) Note: P indicates power supply pins, and I/O indicates input/output pins. 2.3 Test Pin Definition Table 2-2 WRD2L test pins Pin No.
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WRD2L Datasheet 3. Electrical Parameters 3.1 Absolute Electrical Parameters Table 3-1 Absolute electrical parameters Parameter Description Minimum Value Maximum Value Unit Ts Storage temperature –40 105 °C VBAT Power supply voltage 3.0 3.6 V Static electricity voltage (human body model) Tamb = 25°C N/A 2 kV Static electricity voltage (machine model) Tamb = 25°C N/A 0.5 kV 3.
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WRD2L Datasheet Parameter Description Minimum Value VOH I/O high-level output VCC x 0.8 Imax I/O drive current N/A Typical Value Maximum Value Unit N/A VCC V N/A 12 mA 3.3 RF Current Consumption Table 3-3 Current consumption during constant transmission and receiving Working Status TX RX Parameter Mode TX Power/ Receiving Rate Typical Value 17±3 dBm Maximum Value Unit 802.11b 11 Mbit/s 802.11g 54 Mbit/s 802.11n MCS7 20±3 dBm 802.
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WRD2L Datasheet Working Mode Working Status (Ta = 25°C) Average Value Maximum Value Unit Connected The module is connected to the network, and the Wi-Fi indicator is steady on. 68 264 mA Disconnected The module is disconnected from the network, and the Wi-Fi indicator is steady off. 14.5 18 mA 4 RF Features 4.1 Basic RF Features Table 4-1 Basic RF features Parameter Description Frequency band 2.4GHz Wi-Fi standard IEEE 802.11b/g/n 802.11b: 1, 2, 5.
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WRD2L Datasheet Parameter Minimum Value Typical Value Maximum Value Unit Average RF output power, 802.11g OFDM mode 54 Mbit/s N/A 13.5 N/A dBm Average RF output power, 802.11n OFDM mode MCS7 N/A 12 N/A dBm –10 N/A +10 ppm Frequency error 4.3 RX Performance Table 4-3 RX sensitivity Parameter Minimum Value Typical Value Maximum Value Unit PER < 8%, 802.11b CCK mode 11 Mbit/s N/A –83 N/A dBm PER < 10%, 802.11g OFDM mode 54 Mbit/s N/A –72 N/A dBm PER < 10%, 802.
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WRD2L Datasheet To prevent adverse impact on the antenna radiation performance, avoid copper or traces along the antenna area on the PCB. For details about the onboard PCB antenna area on WRD2L, see Figure 6-1. 6. Packaging Information and Production Instructions 6.1 Mechanical Dimensions The PCB dimensions (H x W x D) are 2.8±0.15 mm x 17.3±0.35 mm x 15±0.35 mm. Figure 6-1 WRD2L PCB mechanical dimensions Figure 6-2 Side view Hangzhou Tuya Information Technology Co., Ltd. 12 V1.0.
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WRD2L Datasheet 6.2 Recommended Pin figure Figure 6-3 WRD2L pins WRD2L can be mounted onto a PCB by using an SMT placement machine or connected to the PCB through a pin header. Figure 6-4 shows the pin header dimensions. Figure 6-4 WRD2L pin header dimensions Hangzhou Tuya Information Technology Co., Ltd. 13 V1.0.
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WRD2L Datasheet Figure 6-5 Layout of the PCB to which WRD2L applies 6.3 Production Instructions 1. Use an SMT placement machine to mount the stamp hole module that Tuya produces onto the PCB within 24 hours after the module is unpacked and the firmware is burned. If not, vacuum pack the module again. Bake the module before mounting the module onto the PCB. (1) SMT placement equipment i. Reflow soldering machine ii. Automated optical inspection (AOI) equipment iii.
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WRD2L Datasheet (2) The shelf life of a dry-packaged product is six months from the date when the product is packaged and sealed. (3) The package contains a humidity indicator card (HIC). Figure 6-6 HIC for WRD2L 3. Bake a module based on HIC status as follows when you unpack the module package: (1) If the 30%, 40%, and 50% circles are blue, bake the module for 2 consecutive hours. (2) If the 30% circle is pink, bake the module for 4 consecutive hours.
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WRD2L Datasheet batches for visual inspection and AOI. 6.4 Recommended Oven Temperature Curve Perform SMT placement based on the following reflow oven temperature curve. The highest temperature is 245°C. Figure 6-7 Oven temperature curve Hangzhou Tuya Information Technology Co., Ltd. 16 V1.0.
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WRD2L Datasheet 6.5 Storage Conditions 7. MOQ and Packing Information MOQ and packing information Product Model WRD2L MOQ Packing Method Number of Modules in Each Reel Pack Number of Reel Packs in Each Box 4000 Carrier tape and reel packing 1000 4 Hangzhou Tuya Information Technology Co., Ltd. 17 V1.0.
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WRD2L Datasheet 8 Appendix: Statement Federal Communications Commission (FCC) Declaration of Conformity FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This device complies with Part 15 of the FCC Rules.
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WRD2L Datasheet Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. The availability of some specific channels and/or operational frequency bands is country dependent and firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user.