WBR3N Datasheet

Last Updated on : 2020-07-31 03:33:11download

Product Overview

WBR3N is a low-power embedded WiFi+BT module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8720CS), a few peripherals, an embedded WiFi network protocol stack, the BT network protocol, and varied library functions. WBR3N has an embedded low-power 32-bit CPU, 512 KB static random-access memory (SRAM), 4 MB flash memory, and rich peripherals. WBR3N is an RTOS platform that integrates all function libraries of the WiFi MAC and TCP/IP protocols. You can develop embedded WiFi products as required.

Features

  1. Embedded low-power 32-bit CPU, which can also function as an application processor
  2. The maxium clock rate: 200 MHz
  3. Working voltage: 3.0 to 3.6 V
  4. Peripherals: 8 GPIOs, 1 universal asynchronous receiver/transmitter (UART), and 1 analog to digital converter (ADC)
  5. WiFi connectivity
    • 802.11b/g/n 1x1 2.4 G
    • Channels 1 to 14 at 2.4 Ghz
      • Support WPA and WPA2 security modes
    • Up to +17.5 dBm output power in 802.11b mode
    • Support STA/AP/STA+AP working modes
    • Support SmartConfig and AP network configuration manners for Android and iOS devices
    • Onboard PCB antenna with a gain of 2.5 dBi at 2.4 G
    • Working temperature: -20 to 85℃
  6. BT/BLE connectivity
    • Support BLE V5.0
    • Up to the output power of +9 dbm The default output power is 7dB.
    • PCB antenna with a gain of 2.5 dBi at 2.4 G shared with WiFi
      • Working temperature: -20 to 85℃

Applications

  • Intelligent building
  • Smart household and home appliances
  • Smart socket and light
  • Industrial wireless control
  • Baby monitor
  • Network camera
  • Intelligent bus

Change History

Serial NumberUpdate DateUpdated ContentVersion after Update
17/13/2020This is the first release.V1.0.0

Module Interfaces

Dimensions and Footprint

WBR3N has two rows of pins with a 2± 0.1mm pin spacing. The WBR3N dimensions are 16 (W)×24 (L) ×3.0mm (H). The diagram of dimensions of WBR3N is as belows: WBR3N Datasheet Note: The general shape tolerance is +/-0.35 mm, the position tolerance related to the plug-in assembly is reduced to ±0.1 mm, and the tolerance of the 0.8-mm-thick plate is ±0.1 mm.

Pin Definition

WBR3N Datasheet

Serial NumberSymbolI/O TypeFunction
1RSTI/OReset
2ADCAIADC^(1)^, which corresponds to PB 3 of IC
3ENIEnabling pin, which needs to be connected to the voltage of 3.3V in normal cases and corresponds to CHIP_EN of IC
4PA15I/OCommon IO pin, which corresponds to PA 15 of IC
5PA25PSupport hardware PWM and correspond to PA 25 of IC
6PA26I/OSupport hardware PWM and correspond to PA 26 of IC
7PA28I/OSupport hardware PWM and correspond to PA 28 of IC
83V3PPower supply source (3.3V)
9GNDPPower supply reference ground
10PA14OCommon IO pin, which corresponds to PA 14 of IC
11L_TXOUART0_TXD, which is used for displaying the internal information of a module and corresponds to UART_TXD of IC
12PA27I/OCommon IO pin, which corresponds to PA 27 of IC
13PA13I/OSupport hardware PWM and correspond to PA 13 of IC
14PA12I/OSupport hardware PWM and correspond to PA 12 of IC
15RX/PB2I/OUART0_RXD(2), which corresponds to PB 2 of IC
16TX/PB1I/OUART0_TXD(2), which corresponds to PB 1 of IC

Note: P indicates power supply pins, I/O indicates input/output pins, and AI indicates analog input pins. RST is only a resetting pin of a module and cannot be used for clearing information about WiFi network configuration. (1): The pin can only be used as an ADC interface but cannot be used as a common IO interface. Once not used, it needs to be pulled up. As an ADC input port, the input voltage range is 0 to 1.0V. (2): UART0 is a user-side serial interface pin. When a module is enabled, there is information output from the user-side serial interface pin, which can be neglected.

Electrical Parameters

Absolute Electrical Parameters

ParameterDescriptionMinimum ValueMaximum ValueUnit
TsStorage temperature-2085
VBATPower supply voltage3.03.6V
Static electricity voltage (human body model)TAMB-25℃-2KV
Static electricity voltage (machine model)TAMB-25℃-0.5KV

Normal Working Conditions

ParameterDescriptionMinimum ValueTypical ValueMaximum ValueUnit
TaWorking temperature-20-85
VBATPower supply voltage3.03.33.6V
VILI/O low-level input-0.3-VCC*0.25V
VIHI/O high-level inputVCC*0.75-VCCV
VOLI/O low-level output--VCC*0.1V
VoHI/O high-level outputVCC*0.8-VCCV
ImaxI/O drive current--12mA

TX and RX Power Consumption:

Transmission and Receiving at 2.4G

Working StatusModeRateTransmit Power/ReceivingMaximum Value (Typical Value)Unit
Transmission11b11 Mbps+17.5 dBm250mA
Transmission11g54 Mbps+14.5 dBm200mA
Transmission11n-HT20MCS7+14.5 dBm200mA
Transmission11n-HT40MCS7+13.5 dBm162mA
Receiving11b11 Mbpsconstantly receive70mA
Receiving11g54 Mbpsconstantly receive72mA
Receiving11n-HT20MCS 7constantly receive70mA
Receiving11n-HT40MCS 7constantly receive73mA

Working Current

Working ModeWorking Status, Ta = 25°CAverage ValueMaximum Value (Typical Value)Unit
Quick connection network statusThe module is in the fast network connection state and the WiFi indicator always flashes57184mA
Hotspot network configuration stateThe module is in the hotspot network configuration state and the WiFi indicator always flashes slowly203392mA
Network connection stateThe module is connected to the network and the WiFi indicator is always on5598mA
Disconnected statusThe module is disconnected and the WiFi indicator is dark5359mA

RF Parameters

Basic RF Features

ParameterDescription
Working frequencyWiFi: 2.412 to 2.484 Ghz (channels 1 to 11 for US/CA and channels 1 to 13 for EU/CN); Bluetooth: 2402 to 2480 MHz
WiFi standardIEEE 802.11 b/g/n
Data transmission rateWiFi: 11b: 1, 2, 5.5, 11 (Mbps); 11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps); 11n: HT2 0 MCS 0 to7; HT40 MCS 0 to 7; Bluetooth: 1M/2M
Antenna TypePCB antenna with a gain of 2.5 dBi at 2.4 G

TX Performance

TX Performance at 2.4 G

ParameterMinimum ValueTypical ValueMaximum ValueUnit
Average RF output power, 802.11b CCK Mode, 1 Mbit/s-17.5-dBm
Average RF output power, 802.11g OFDM mode, 54 Mbit/s-14.5-dBm
Average RF output power, 802.11n HT20 mode, MCS7-14.5-dBm
Average RF output power, 802.11n HT40 mode, MCS7-13.5-dBm
Frequency error-10-10ppm

RX Performance

RX sensitivity

ParameterMinimum ValueTypical ValueMaximum ValueUnit
PER<8%, RX sensitivity, 802.11b CCK Mode 11M--90-dBm
PER<10%, RX sensitivity, 802.11g, 54 M--77-dBm
PER<10%, RX sensitivity, 802.11n HT20-MCS7--75-dBm
PER<10%, RX sensitivity, 802.11n HT20-MCS7--72-dBm

Antenna Information

Antenna Type

WBR3N uses only an onboard PCB antenna.

Antenna Interference Reduction

To ensure optimal WiFi performance when the WiFi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts. To ensure the antenna performance, the PCB should not be routed or clad with copper in the antenna area. The main points of the layout: 1. Make sure that there is no substrate medium directly below or above the printed antenna. 2. Make sure that the area around the printed antenna is far away from the metal copper skin, so as to ensure the radiation effect of the antenna to the greatest extent.

WBR3N Datasheet

For the antenna area of the PCB of the module, refer to Diagram of Mechanical Dimensions.

Power-on Sequence and Resetting

Power-on Sequence

The RTL8720CS chip has requirements on the power-on sequence. It is recommended that the voltage rise from 0 to 3.3V within 40mS WBR3N Datasheet

SymbolParameterMinimum ValueTypical ValueMaximum ValueUnit
TPRDY3.3V ready time0.6 40mS
CHIP_ENCHIP_EN ready time0.6 40mS

Treatment of GPIO Pins

A few pins (PA 12, PA 13, PA 15, PA 25, PA 28, and PA 26) of the module will have instantaneous high-level pulses before the chip fully works, and everything will be normal after the chip works. For these pins, if they are directly used as driving light sources or relays, in order to avoid the effect of burrs at the moment of power-on, refer to the following processing: Pull down a 1K resistor at an output port of a pin, and then connect a diode in series. At this time, the voltage of a GPIO will drop to about 2.7V after passing through the diode. The red box represents the original drive tube on the customer's baseboard. A diode D1 and pull-down 1K resistor need to be added. If a lamp is directly driven, pull down a 10K resistor on the grid of the positive Mos. If a lamp is not directly driven and a PWM signal will not be sent until the module is officially launched, there is no need to add a pull-down resistor and diode. If a relay is driven, you can change the diode to a resistor of 0 ohm according to the actual situation.

WBR3N Datasheet

Packaging Information and Production Instructions

Mechanical Dimensions

The WBR3N dimensions are 16mm (W)×24mm (L) ×3.0mm (H).

WBR3N Datasheet

Note: The default dimensional tolerance is ±0.35 mm. If you have specific requirements on dimensions, make them clear in the datasheet after communication.

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. A. SMT placement equipment

    • a) Reflow soldering machine
    • b) Automated optical inspection (AOI) equipment
    • c) Nozzle with a 6 mm to 8 mm diameter

    B. Baking equipment - a) Cabinet oven - b) Anti-static heat-resistant trays - c) Anti-static heat-resistant gloves

  2. Storage conditions for a delivered module are as follows:

  3. The moisture-proof bag must be placed in an environment where the temperature is below 30°C and the relative humidity is lower than 70%.
  4. The shelf life of a dry-packaged product is 6 months from the date when the product is packaged and sealed.
  5. The package contains a humidity indicator card (HIC). WBR3N Datasheet

  6. Bake a module based on HIC status as follows when you unpack the module package:

  7. A. If the 30%, 40%, and 50% circles are blue, bake the module for 2 consecutive hours.
  8. B. If the 30% circle is pink, bake the module for 4 consecutive hours.
  9. C. If the 30% and 40% circles are pink, bake the module for 6 consecutive hours.
  10. D. If the 30%, 40%, and 50% circles are blue, bake the module for 12 consecutive hours.

  11. Baking settings:

  12. A. Baking temperature: 125±5°C
  13. B. Baking time: 130°C
  14. C. SMT placement ready temperature after natural cooling: < 36°C
  15. D. The number of drying times: 1
  16. E. Rebaking condition: The module is not soldered within 12 hours after baking.

  17. Do not use SMT to process modules that have been unpacked for more than 3 months. Electroless nickel immersion gold (ENIG) is used for the PCBs. If the solder pads are exposed to the air for more than 3 months, they will be oxidized severely and dry joints or solder skips may occur. Tuya is not liable for such problems and consequences.

  18. Before SMT placement, take electrostatic discharge (ESD) protective measures.

  19. To reduce the reflow defect rate, draw 10% of the products for visual inspection and AOI before the first SMT placement to determine proper methods for controlling the oven temperature and attaching and placing components. Draw 5 to 10 modules from subsequent batches each hour for visual inspection and AOI.

Recommended Oven Temperature Curve

Perform SMT placement based on the following reflow oven temperature curve. The highest temperature is 245°C. The reflow temperature curve is shown as belows:

WBR3N Datasheet

Storage Conditions

WBR3N Datasheet

MOQ and Packaging Information

Product NumberMOQ (pcs)Shipping packaging methodThe number of modules per reel (pcs)The number of reels per carton (reel)
WBR3N Tape reel 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 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.

Note: This equipment has been tested and found to complyAppth the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with 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 equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment 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 equipment and receiver.
  • Connect the equipment into 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 equipment complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

Important Note

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

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 by the end user. The host product manufacturer is responsible for compliance to 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/warning 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 have got a FCC ID: 2ANDL-WBR3N. The final end product must be labeled in a viApple area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WBR3N”

This device is intended only for OEM integrators under the following conditions: 1)The antenna must be installed such that 20cm is maintained between the antenna and users, and 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test 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

WBR3N 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.

WBR3N Datasheet

This product must not be disposed of as normal household waste, in accordance with 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 to the human body.

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