User's Manual

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WBR3N User manual

1 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 randomaccess 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.

1.1 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

Summary of content (9 pages)

PAGE 1
WBR3N User manual 1 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 randomaccess memory (SRAM), 4 MB flash memory, and rich peripherals.
PAGE 2
• 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℃ 1.2 Applications • Intelligent building • Smart household and home appliances • Smart socket and light • Industrial wireless control • Baby monitor • Network camera • Intelligent bus 2. Electrical Parameters 2.
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2.2 Normal Working Conditions 4 RF Parameters 4.1 Basic RF Features 5 Antenna Information 5.
PAGE 4
WBR3N uses only an onboard PCB antenna. 5.2 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.
PAGE 5
17 / 237 PACKAGING INFORMATION AND PRODUCTION INSTRUCTIONS • 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: • The moisture-proof bag must be placed in an environment where the temper ature is below 30°C and the relative humidity is lower than 70%.
PAGE 6
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. 6. Before SMT placement, take electrostatic discharge (ESD) protective measures. 7.
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this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply 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.
PAGE 8
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 Sub part 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.
PAGE 9
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.