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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

Summary of content (19 pages)

PAGE 1
WRD3L Datasheet Global Intelligent Platform Product Manual Tuya WRD3L Wi-Fi Module Version: 2.0.1 Date: 2019-10-15 No.: 0000000001 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.
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WRD3L Datasheet ⚫ 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 Hangzhou Tuya Information Technology Co., Ltd. 2 V2.0.
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WRD3L Datasheet 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 2.0.1 architecture diagram. Hangzhou Tuya Information Technology Co., Ltd. 3 V2.0.
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WRD3L Datasheet Contents 1 2 3 4 5 6 Product Overview ......................................................................................................... 1 1.1 Features .......................................................................................................... 1 1.2 Applications ..................................................................................................... 2 Module Interfaces ..............................................................................
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WRD3L Datasheet 6.5 7 Storage Conditions ....................................................................................... 17 MOQ and Packing Information ................................................................................... 17 Figures Figure 1-1 WRD3L architecture .......................................... Error! Bookmark not defined. Figure 2-1 WRD3L front and rear views ..............................................................................
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WRD3L Datasheet 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.
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WRD3L Datasheet Pin No. Symbol I/O Type 5 GPIO24 I/O Function GPIO_24, a standard PWM pin, which is connected to GPIO24 (pin 32) on the internal IC 6 GPIO23 I/O GPIO_23, a standard PWM pin, which is connected to GPIO23 (pin 33) on the internal IC 7 GPIO22 I/O GPIO_22, a standard PWM pin, which is connected to GPIO22 (pin 34) on the internal IC 8 VCC P Power supply pin (3.
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WRD3L Datasheet 3. The UART pins are user-side serial interfaces. 3.3 Test Pin Definition Table 2-2 WRD3L test pins Pin No. Symbol N/A I/O Type N/A Function Used for the module production test Note: Test pins cannot be used. 4 Electrical Parameters 4.1 Absolute Electrical Parameters Table 3-1 Absolute electrical parameters Parameter Ts Description Storage Minimum Maximum Value Value Unit –40 105 °C 3.0 3.6 V Tamb = 25°C N/A 2 kV Tamb = 25°C N/A 0.
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WRD3L Datasheet 4.2 Electrical Conditions Table 3-2 Normal electrical conditions Parameter Ta Description Working Minimum Typical Maximum Value Value Value Unit –20 N/A 105 °C temperature VCC Working voltage 3.0 3.3 3.6 V VIL I/O low-level input –0.3 N/A VCC x 0.3 V VIH I/O high-level input VCC x 0.7 N/A VCC V VOL I/O low-level output N/A N/A VCC x 0.1 V VOH I/O high-level VCC x 0.8 N/A VCC V N/A N/A 10 mA output Imax I/O drive current 4.
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WRD3L Datasheet 4.4 Working Current Table 3-5 WRD3L working current Working Mode Working Status (Ta = 25°C) Average Value Unit EZ The module is in EZ mode. 70 mA AP The module is in AP mode. 80 mA Connected The module is connected to the network. 70 mA 5 RF Features 5.1 Basic RF Features Table 4-1 Basic RF features Parameter Description Frequency band 2.4GHz Wi-Fi standard IEEE 802.11b/g/n20 802.11b: 1, 2, 5.5, or 11 (Mbit/s) Data transmission rate 802.
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WRD3L Datasheet Parameter Minimum Typical Maximum Value Value Value Unit OFDM mode Average RF output power, 802.11n MCS7 N/A 13 N/A dBm –20 N/A +20 ppm Minimum Typical Maximum Value Value Value OFDM mode Frequency error 5.3 WRD3L RX Sensitivity Table 4-3 RX sensitivity Parameter Unit PER < 8%, 802.11b CCK mode 1 Mbit/s N/A –90 N/A dBm PER < 10%, 802.11g OFDM mode 54 Mbit/s N/A –73 N/A dBm PER < 10%, 802.11n OFDM mode MCS7 N/A –70 N/A dBm 6 Antenna Information 6.
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WRD3L Datasheet at a certain distance away from the antenna to maximize the antenna radiation performance. 6.3 Antenna Connector Specifications WRD3L does not use an antenna connector. 7 Packaging Information and Production Instructions 7.1 Mechanical Dimensions Figure 6-1 WRD3L mechanical dimensions Hangzhou Tuya Information Technology Co., Ltd. 12 V2.0.
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WRD3L Datasheet Figure 6-2 Side view 7.2 Recommended Pin figure Figure 6-3 WRD3L pins Hangzhou Tuya Information Technology Co., Ltd. 13 V2.0.
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WRD3L Datasheet Figure 6-4 Layout of the PCB to which WRD3L applies 7.3 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 it onto the PCB. (1) SMT placement equipment i. Reflow soldering machine ii. Automated optical inspection (AOI) equipment iii.
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WRD3L Datasheet (1) The moisture-proof bag is placed in an environment where the temperature is below 30°C and the relative humidity is lower than 70%. (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 6-5 HIC for WRD3L 3.
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WRD3L Datasheet 6. Before SMT placement, take electrostatic discharge (ESD) protective measures. 7. To reduce the reflow defect rate, draw 10% of the products for visual inspection and AOI before first SMT placement to determine a proper oven temperature and component placement method. Draw 5 to 10 modules every hour from subsequent batches for visual inspection and AOI. 7.4 Recommended Oven Temperature Curve 1. Perform SMT placement based on the following reflow oven temperature curve.
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WRD3L Datasheet 7.5 Storage Conditions 8 MOQ and Packing Information MOQ and packing information Number of Product Model MOQ Packing Modules in Method Each Reel Pack Number of Reel Packs in Each Box Carrier tape WRD3L and reel packing 9 Appendix: Statement Federal Communications Commission (FCC) Declaration of Conformity Hangzhou Tuya Information Technology Co., Ltd. 17 V2.0.
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WRD3L Datasheet 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. 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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WRD3L Datasheet 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.