RTLDUINO is a board consisting of the RTL8720DN (BW16) module. There are 13 GPIOs, an RGB LED for general use, two buttons for programming and reset (Burn and RST), micro USB connector for programming / power. The RTL8720DN module features dual band Wi-Fi (2.4GHz and 5.8GHz) and Bluetooth Low Energy 5.0. It consists of a high performance MCU named KM4 at 200 MHz, a low power MCU named KM0 at 20 MHz. It has UART, GPIO, ADC, PWM, I2C, SPI, SWD. It can be used in a wide range of applications such as: wearable devices, low power sensor networks, audio headsets, smart plugs, home automation, mesh networks, industrial wireless control, wearable electronics, etc.

• CPU and memory
  - SoC wireless – MCU Realtek RTK8720DN with core Arm Cortex-M4 KM4 a 200 MHz and core Arm Cortex-M0 KM0 a 20 MHz
   
• Wi-Fi 
  - 802.11 a/b/g/n WiFi 4
  - Range di frequenza: 2.412-2.484GHz / 5.180-5.825 GHz
  - Data Rates:
    802.11a: 6,9,12,18,24,36,48,54Mbps
    802.11b: 1,2,5.5,11Mbps
    802.11g: 6,9,12,18,24,36,48,54Mbps
    802.11n: MCS0–MCS7 @ HT20/HT40 2.4 GHz e 5,8 GHz bands
    Working mode: AP, Station, AP/Client

• Bluetooth 
  - Standard 5.0 BLE
  - Receiving sensitivity: -92 dBm
  - Transmission power: 7 dBm
  - Antenna - IPEX connector or PCB Antenna
   
• Connectors 2x15: 13 GPIO (ADC, UART, I²C, SPI, PWM, SWD), VIN, 3V3, GND, EN
• Power supply: 5V means micro USB
• Working temperature: -20°C ~ +70°C
• Storage temperature: -40°C ~ +125°C
• Dimensions (mm): 49x25,5x13

• Datasheet RTL8720DN
• GitHub