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Global Intelligent Platform
Product
Manual
Version: 1.0.0
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
Hangzhou Tuya Information Technology Co., Ltd.
Tuya WRD2L Wi-Fi Module
Date: 2019-07-26
No.: 0000000004
1
WRD2L Datasheet
V1.0.0
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Summary of Contents for TUYA WRD2L
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Page 1: Product Overview
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. 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. -
Page 2: Applications
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. V1.0.0... - Page 3 WRD2L Datasheet Change History Date Change Description Version After Change 2019-09-20 This is the first release. 1.0.0 Hangzhou Tuya Information Technology Co., Ltd. V1.0.0...
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Page 4: Table Of Contents
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 6.5 Storage Conditions......................17 7. MOQ and Packing Information....................17 8 Appendix: Statement........................18 Hangzhou Tuya Information Technology Co., Ltd. V1.0.0... - Page 5 Figure 6-2 Side view........................12 Figure 6-3 WRD2L pins.........................13 Figure 6-4 WRD2L pin header dimensions................13 Figure 6-5 Layout of the PCB to which WRD2L applies............14 Figure 6-6 HIC for WRD2L......................15 Figure 6-7 Oven temperature curve................... 16 Hangzhou Tuya Information Technology Co., Ltd.
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Page 6: 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. -
Page 7: Test Pin Definition
Power supply reference ground pin 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. Symbol I/O Type Function Power supply reference ground pin... -
Page 8: Electrical Parameters
Typical Maximum Unit Value Value Value Working –40 °C temperature VBAT Power supply voltage I/O low-level –0.3 VCC x 0.25 input I/O high-level VCC x 0.75 input I/O low-level VCC x 0.1 output Hangzhou Tuya Information Technology Co., Ltd. V1.0.0... -
Page 9: Rf Current Consumption
11 Mbit/s Constant receiving 802.11g 54 Mbit/s Constant receiving 802.11n MCS7 Constant receiving 3.4 Working Current Table 3-4 WRD2L working current Working Working Status (Ta = 25°C) Average Maximum Unit Mode Value Value The module is in EZ mode, and the Wi-Fi indicator blinks quickly. -
Page 10: Rf Features
PCB antenna with a gain of 2.0 dBi 4.2 TX Performance Table 4-2 Performance during constant transmission Parameter Minimum Typical Maximum Unit Value Value Value Average RF output power, 11 Mbit/s 802.11b CCK mode Hangzhou Tuya Information Technology Co., Ltd. V1.0.0... -
Page 11: Rx Performance
OFDM mode 5 Antenna Information 5.1 Antenna Type WRD2L uses an onboard PCB antenna. 5.2 Antenna Interference Reduction To ensure optimal Wi-Fi performance when the Wi-Fi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts. -
Page 12: Packaging Information And Production Instructions
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. -
Page 13: Recommended Pcb Layout
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. -
Page 14: Production Instructions
Figure 6-5 Layout of the PCB to which WRD2L applies 6.3 Production Instructions 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. -
Page 15: Figure 6-6 Hic For Wrd2L
Electroless nickel immersion gold (ENIG) is used for the PCBs. If the solder pads are exposed to the air for over three months, they will be oxidized severely and dry joints or solder skips may occur. Tuya is not liable for such problems and consequences. Before SMT placement, take electrostatic discharge (ESD) protective measures. -
Page 16: Recommended Oven Temperature Curve
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. V1.0.0... -
Page 17: Storage Conditions
7. MOQ and Packing Information MOQ and packing information Product Packing Number of Modules Number of Reel Model Method in Each Reel Pack Packs in Each Box Carrier tape WRD2L 4000 and reel 1000 packing Hangzhou Tuya Information Technology Co., Ltd. V1.0.0... -
Page 18: Appendix: Statement
—Consult the dealer or an experienced radio/TV technician for help. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body. Hangzhou Tuya Information Technology Co., Ltd. V1.0.0... - Page 19 Declaration of Conformity European notice Hereby, Hangzhou Tuya Information Technology Co., Ltd. declares that this Wi-Fi module product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EC. A copy of the Declaration of conformity can be found at https://www.tuya.com.
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