WR2L Module Datasheet

Last Updated on : 2023-06-05 02:01:23download

WR2L is a low-power built-in Wi-Fi module developed by Tuya. It consists of a highly integrated radio frequency chip (RTL8710BX) and an external flash chip, with a built-in Wi-Fi network protocol stack and rich library functions.

After a period of service, this module will become deprecated due to product upgrades and iterations, user requirements, production inventory, or other reasons. To improve the compatibility of your smart devices and minimize the impact on your use, Tuya continues to provide webpage documentation of deprecated modules, but no longer maintains or updates the documentation. The content herein is for reference only.
If you have any questions, submit a ticket to contact Tuya or consult Tuya’s account manager to request support.


WR2L contains a low power-consumption ARM CM4F, a WLAN MAC, a 1T1R WLAN, and the maximum basic frequency of 62.5 MHz, and is embedded with a 256 KB SRAM, a 2 MB flash, and rich peripheral resources.

WR2L is an RTOS platform that integrates all the function libraries of the Wi-Fi MAC and TCP/IP protocols. You can develop built-in Wi-Fi products as required.


  • Built-in low power-consuming 32-bit CPU functioning as an application processor
  • Clock rate: 62.5 MHz
  • Operating voltage: 3 V to 3.6 V
  • Peripherals: 5 GPIOs
  • Wi-Fi connectivity
    • 802.11 b/g/n20/n40
    • Channels 1 to 14@2.4 GHz
    • WEP/WPA/WPA2/WPA2 PSK (AES) security mode
    • Up to +20 dBm output power in 802.11b mode
    • SmartConfig mode (for Android and iOS devices)
    • Onboard PCB antenna with a gain of 2.5 dBi
    • Passed CE, FCC, and SRRC certifications
    • Operating temperature: –20°C to +105°C

Application fields

  • Intelligent building
  • Intelligent home and household appliances
  • Healthcare
  • Industrial wireless control
  • Baby monitor
  • Network camera
  • Intelligent bus

Module interfaces

Dimensions and pin layout

WR2L has two lines of pins with a distance of 2 mm between every two pins.

WR2L dimensions: 15±0.35 mm (W) x 17.37±0.35 mm (L) x 4.9±0.15 mm (H).

WR2L Module Datasheet

Pin definition

No. Symbol I/O type Function
1 GPIOA_15 I/O GPIOA_15, hardware PWM, corresponding to Pin 14 on the IC
2 GPIOA_14 I/O GPIOA_14, hardware PWM, corresponding to Pin 13 on the IC
3 GPIOA_5 I/O GPIOA_5, hardware PWM, corresponding to Pin 28 on the IC
5 GPIOA_12 I/O GPIOA_12, hardware PWM, corresponding to Pin 17 on the IC
6 GND P Power supply reference ground pin
7 VD33 P Module power supply pin (3.3 V)

Note: P indicates power-supply pins and I/O indicates input/output pins.

Electrical parameters

Absolute electrical parameters

Parameter Description Minimum value Maximum value Unit
Ts Storage temperature –40 125 °C
VDD Supply voltage –0.3 3.6 V
ESD voltage (human body model) TAMB – 25°C - 2 kV
ESD voltage (machine model) TAMB – 25°C - 0.5 kV

Working conditions

Parameter Description Minimum value Typical value Maximum value Unit
Ta Operating temperature –20 - 105 °C
VDD Operating voltage 3.0 - 3.6 V
VIL I/O low-level input -0.3 - VDD x 0.25 V
VIH I/O high-level input VDD x 0.75 - 3.6 V
VOL I/O low-level output - - VDD x 0.1 V
VOH I/O high-level output VDD x 0.8 - VDD V
Imax I/O drive current - - 16 mA
Cpad Input pin capacitance - 2 - pF

Wi-Fi TX power consumption

Working status Mode Rate Transmit power/Receive Average value Peak value (Typical value) Unit
Transmit 11b 11Mbps +17dBm 287 367 mA
Transmit 11b 11Mbps +18dBm 295 382 mA
Transmit 11g 54Mbps +15dBm 255 406 mA
Transmit 11g 54Mbps +17.5dBm 267 428 mA
Transmit 11n-HT20 MCS7 13dBm 244 395 mA
Transmit 11n-HT20 MCS7 16.5dBm 257 422 mA
Transmit 11n-HT40 MCS7 13dBm 220 393 mA
Transmit 11n-HT40 MCS7 16.5dBm 230 420 mA

Wi-Fi RX power consumption

Symbol Mode Typical value Unit
Receive CPU sleep 90 mA
Receive CPU active 120 mA

Power consumption in working mode

Working mode Working status (Ta = 25°C) Average value Typical value (Peak value) Unit
Fast network configuration The module is in fast network configuration state, and the Wi-Fi indicator light flashes fast. 115 376 mA
Network configuration via hotspot The module is in the state of network configuration via hotspot, and the Wi-Fi indicator light flashes slowly. 60 386 mA
Idle The module is in connected state, and the Wi-Fi indicator light is always on. 105 389 mA
Operating The module is in connected state, and the Wi-Fi indicator light is always on. 105 389 mA
Disconnected The module is in disconnected state, and the Wi-Fi indicator light is always off. 45 381 mA

Note: The peak duration is about 5 µs. The above parameters vary with different firmware.

RF features

Basic RF features

Parameter Description
Frequency band 2.400 GHz to 2.4835 GHz
Wi-Fi standard IEEE 802.11b/g/n (channels 1 to 14)
Data transmission rate 11b: 1, 2, 5.5, 11 (Mbit/s)
11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbit/s)
11n: HT20 MCS0 to MCS7
11n: HT40 MCS0 to MCS7
Antenna type PCB antenna with the gain of 2.5 dBi

Wi-Fi output power

Parameter Minimum value Typical value Maximum value Unit
RF average output power, 802.11b CCK mode 11 Mbit/s - 17.5 - dBm
RF average output power, 802.11g OFDM mode 54 Mbit/s - 14.5 - dBm
RF average output power, 802.11n OFDM mode MCS7 - 13.5 - dBm
Frequency error –10 - 10 ppm

Wi-Fi RX sensitivity

Parameter Minimum Value Typical Value Maximum Value Unit
PER < 8%, RX sensitivity, 802.11b CCK mode 11 Mbit/s - –91 - dBm
PER < 10%, RX sensitivity, 802.11g OFDM mode 54 Mbit/s - –75 - dBm
PER < 10%, RX sensitivity, 802.11n OFDM mode MCS7 - –72 - dBm


Antenna types

WR2L uses the onboard PCB antenna with a gain of 2.5 dBi.

Antenna interference reduction

When using an onboard PCB antenna on a Wi-Fi module, to ensure optimal Wi-Fi performance, it is recommended that the antenna on the module be at least 15 mm away from other metal parts.

Avoid wiring or laying copper at the antenna area of the PCB. During layout, you should pay attention to the following points:

  • Ensure that there is no substrate medium below or above the antenna.
  • There is no copper around the antenna.

WR2L Module Datasheet

Packaging and production instructions

Mechanical dimensions

WR2L Module Datasheet

Recommended PCB footprint

WR2L Module Datasheet

Production instructions

  • For the in-line module developed by Tuya, wave soldering equipment is most preferred and manual soldering is less preferred. After being unpacked, the module must be soldered within 24 hours. Otherwise, it must be put into the drying cupboard where the RH is not greater than 10%, or it needs to be packaged under vacuum again and record the exposure time (the total exposure time cannot exceed 168 hours).

  • Soldering equipment and materials:

    • Wave soldering equipment
    • Wave soldering fixture
    • Constant-temperature soldering iron
    • Tin bar, tin wire, and flux
    • Oven temperature tester
  • Baking equipment:

    • Cabinet oven
    • Anti-static heat-resistant pallets
    • Anti-static heat-resistant gloves
  • The module needs to be baked in the following cases:

    • The vacuum packing bag was found to be damaged before being unpacked.
    • There is no humidity indicator card (HIC) in the vacuum packing bag.
    • After being unpacked, 10% and above circles on the HIC become pink.
    • The total exposure time has been more than 168 hours since unpacking.
    • More than 12 months have passed since the sealing date of the bag.
  • Baking settings:

    • Temperature: 40°C and ≤ 5% RH for reel package and 125°C and ≤5% RH for tray package (please use the heat-resistant tray rather than a plastic container)
    • Time: 168 hours for reel package and 12 hours for tray package
    • Alarm temperature: 50°C for reel package and 135°C for tray package
    • Production-ready temperature after natural cooling: < 36°C
    • Re-baking situation: If a module remains unused for over 168 hours after being baked, it needs to be baked again.
    • If a batch of modules is not baked within 168 hours, do not use wave soldering to solder them. Because these modules are Level-3 moisture-sensitive devices, they are very likely to get damp when exposed beyond the allowable time. In this case, if they are soldered at high temperatures, it may result in device failure or poor soldering.
  • In the whole production process, take electrostatic discharge (ESD) protective measures.

  • To guarantee the quality of products, you must pay attention to the following items:

    • The amount of soldering flux.
    • The height of the wave peak.
    • Whether the tin slag and copper content in the wave soldering tank exceed standards.
    • Whether the window and thickness of the wave soldering fixture are appropriate.
    • Whether the wave soldering oven temperature curve is reasonable.

Recommended oven temperature curve and temperature

For oven temperature settings, refer to oven temperatures for wave soldering. The peak temperature is 260°C±5°C. The wave soldering temperature curve is shown below:

WR2L Module Datasheet

Recommended soldering temperature:

Recommended wave soldering oven temperature Recommended manual soldering temperature
Preheat temperature 80 to 130 °C Soldering temperature 360±20°C
Preheat time 75 to 100s Soldering time <3s/point
Peak contact time 3 to 5s NA NA
Temperature of tin cylinder 260±5°C NA NA
Ramp-up slope ≤2°C/s NA NA
Ramp-down slope ≤6°C/s NA NA

Storage conditions

Storage conditions for a delivered module are as follows:

  • The moisture-proof bag is placed in an environment where the temperature is below 40°C and the relative humidity is lower than 90%.

  • The shelf life of a dry-packaged product is 12 months from the date when the product is packaged and sealed.

  • The package contains a humidity indicator card (HIC).

    WR2L Module Datasheet

    WR2L Module Datasheet

MOQ and packaging information

Product model MOQ (pcs) Packing method Number of modules in per reel Number of reels in per carton
WR2L 2800 Tape reel 700 4

Appendix: Statement

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this device.

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.

Note: This device has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if not installed and used following the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the device and receiver.
  • Connect the device to an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

Radiation Exposure Statement

This device complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This device should be installed and operated with a minimum distance of 20cm between the radiator and your body.

Important Note

This radio module must not be installed to co-locate and operate simultaneously with other radios in the host system except following FCC multi-transmitter product procedures. Additional testing and device authorization may be required to operate simultaneously with other radios.

The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible to the end-user.

The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.

The end-user manual shall include all required regulatory information/warnings as shown in this manual, including “This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body”.

This device has got an FCC ID: 2ANDL-WR2L. The end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WR2L”.

This device is intended only for OEM integrators under the following conditions:

The antenna must be installed such that 20cm is maintained between the antenna and users, and the transmitter module may not be co-located with any other transmitter or antenna.

As long as the 2 conditions above are met, further transmitter tests will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.

Declaration of Conformity European Notice

WR2L Module Datasheet

Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EU,2011/65/EU. A copy of the Declaration of Conformity can be found at https://www.tuya.com.

WR2L Module Datasheet

This product must not be disposed of as normal household waste, in accordance with the EU directive for waste electrical and electronic equipment (WEEE-2012/19/EU). Instead, it should be disposed of by returning it to the point of sale, or to a municipal recycling collection point.

The device could be used with a separation distance of 20cm from the human body.