WBRG1 Module Datasheet

WBRG1 is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8721CSM) and an external flash chip, with an embedded Wi-Fi network protocol stack and varied library functions.

Overview

With the maximum CPU clock rate of 200 MHz, WBRG1 also contains a KM4 microcontroller unit (MCU), a low-power KM0 MCU, a WLAN MAC, a 1T1R WLAN module, a 4-MB pseudo-static random-access memory (PSRAM), 8-MB flash memory, and rich extensive peripherals.

WBRG1 is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP. You can develop embedded Wi-Fi products as required.

Features

• Embedded low-power 32-bit Cortex-M33 CPU, which can also function as an application processor
• The maximum clock rate: 200 MHz
• Working voltage: 3.0V to 3.6V
• Peripherals: 6 pulse width modulations (PWM), 3 universal asynchronous receiver/transmitters (UART), 1 inter-IC sound (I2S), 1 packet traffic arbitration (PTA), and 1 audio
• Wi-Fi/BT connectivity
  • 802.11 b/g/n20/n40
  • Channels 1 to 14@2.4 GHz (H 1 to 11 for US/CA, and CH 1 to 13 for EU/CN)
  • Support WEP, WPA, WPA2, and WPA2 PSK (AES) security modes
  • Support Bluetooth LE (Bluetooth Low Energy) 5.0
  • Up to + 20dBm output power in 802.11b mode
  • Support SmartConfig and AP network configuration modes for Android and IOS devices
  • Onboard PC antenna and external antenna IPEX connector
  • 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

Module interfaces

Dimensions and package

WBRG1 has 3 rows of pins with a 1.5 mm pin spacing.
As shown in the following figures, the dimensions of WBRG1 are 19±0.35 mm (W)×25.7±0.35 mm (L) ×2.9±0.1 mm (H). The thickness of the PCB is 0.8±0.1 mm.

Pin definition

Note: P indicates a power supply pin and I/O indicates an input/output pin.

Electrical parameters

Absolute electrical parameters

Normal working conditions

TX power consumption

RX power consumption

Power consumption in working mode

Note: The above parameters vary with firmware functions.

RF parameters

Basic RF features

TX performance

TX performance

RX performance

RX sensitivity

Antenna

Antenna type

WBRG1 supports two types of antennas: onboard PCB antenna and external antenna. By default, the onboard PCB antenna is preferred.

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.

To prevent an adverse impact on the antenna radiation performance, avoid copper or traces along the antenna area on the PCB.

U.FL RF connector

Parameters of the U.FL RF connector are as below:

Packaging information and production instructions

Mechanical dimensions

The PCB dimensions are 19±0.35 mm (W)×25.7±0.35 mm (L) ×0.8±0.15 mm (H).

Note: For the PCB frame, the dimensional tolerance is ±0.35 mm, and for the thickness of the PCB, the dimensional tolerance is ±0.1 mm.

The diagram of PCB packaging

Mounting requirements

Use an SMT machine to mount components to the stamp hole module that Tuya produces within 24 hours after the module is unpacked and the firmware is burned. If not, pack the module again in a vacuum.

Note:

• Bake the module before mounting components to the module.
• Before using SMT, take electrostatic discharge (ESD) protective measures.
• Do not use SMT to process modules that have been unpacked for more than 3 months, unless they will be seriously oxidized because electroless nickel/immersion gold (ENIG) is used for PCBs. SMT is very likely to cause pseudo and missing soldering. Tuya is not liable for such problems and consequences.
• To reduce the reflow defect rate, draw 10% of the products for visual inspection and AOI before the first mounting, to determine the rationality of oven temperature control and component attachment and placement manners. Draw 5 to 10 modules from subsequent batches each hour for visual inspection and AOI.

The following equipment or instrument is required:

Storage conditions

Storage conditions for a delivered module are as follows:

• 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%.

• The shelf life of a dry-packaged product is 6 months from the date when the product is packaged and sealed.

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

  

Baking requirements

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

Baking settings

Note: If the module is not soldered within 12 hours after being baked, you need to bake it again.

Recommended oven temperature curve

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

Storage conditions

MOQ and packaging information

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 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 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 operating 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 by 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-WBRG1. The end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WBRG1”.

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

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.

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 to the human body.