1 PRODUCT OVERVIEW
1 Product Overview
WBR3L is a low-power embedded WiFi+BLE module that Tuya has developed. It
consists of a highly integrated wireless RF chip (RTL8720CF), with an embedded
WiFi network protocol stack and varied library functions. With the maximum CPU
clock rate of 100MHz, WBR3L also contains a low-power KM4 microcontroller unit
(MCU), a WLAN MAC, a 1T1R WLAN module, 256-KB static random-access memory
(SRAM), 2-MB flash memory, and extensive peripherals. WBR3L 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 KM4 MCU, which can also function as an application pro-
cessor; Clock rate: 100MHz
2. Working voltage: 3.0 to 3.6 V
3. Peripherals: 9 GPIOs, 1 universal asynchronous receiver/transmitter (UART),
and 1 log transmitter
4. WiFi/BT connectivity
• 802.11 B/G/N20
• Channels 1 to 14 at 2.4 Ghz (channels 1 to 11 for US/CA and channels 1 to
13 for EU/CN)
• Support WEP/WPA/WPA2/WPA2 PSK（AES）security modes
• Support BLE (Bluetooth Low Energy) 4.2
• Up to +20 dBm output power in 802.11b mode
• Support SmartConfig functions for Android and iOS devices
• Onboard PCB antenna
• Passed CE and FCC certification
• Working temperature: -20℃ to 105℃
1.2 Applications
• Intelligent building
• Smart household and home appliances
• Smart socket and light
• Industrial wireless control
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