Realtek RTL8720DN Twin-Band WiFi and Bluetooth 5.0 IoT Module promote for $4 and up

There are many 2.4 GHz WiFi modules for IoT tasks based mostly on processors starting from the Espressif Programs ESP8266 to the TI CC3200, or the Realtek RTL8710. Some others add Bluetooth 4.2/5.0 such because the Espressif Programs ESP32, however it’s a lot more durable to discover a answer with dual-band WiFi, particularly if in case you have a decent finances on your challenge or product.

However the Realtek RTL8720DN – a part of the AmebaD household – solely helps dual-band (2.4/5.0GHz) 802.11 b/g/n WiFi and Bluetooth 5.0 connectivity with the Arm Cortex-M4/M0 wi-fi MCU, and at present offered Modules are present in single items for as little as $3.90 or 24 RMB.

B&T BW16 RTL8720DN Module

BW16 RTL8720DN Dual-Band WiFi & Bluetooth Module


  • Wi-fi SoC – Realtek RTL8720DN MCU with KM4 Arm Cortex-M4 Core @ 200 MHz and KM0 Arm Cortex-M0 Core @ 20 MHz
  • connectivity
    • Wi-Fi
      • 802.11 a/b/g/n WiFi 4
      • Frequency Vary – 2.412-2.484GHz and 5.180-5.825GHz
      • knowledge charges
        • 802.11a: 6,9,12,18,24,36,48,54 Mbps
        • 802.11b: 1,2,5.5,11 Mbps
        • 802.11g: 6,9,12,18,24,36,48,54 Mbps
        • 802.11n: MCS0–MCS7 @ HT20/HT40 2.4GHz and 5GHz bands
      • AP, Station, AP/Shopper Supported
    • Bluetooth
      • Bluetooth 5.0 LE
      • Receiver Sensitivity: -92dBm
      • Transmit Energy: 7dBm
    • Antenna – IPEX Connector or PCB Antenna
  • I/O – GPIO with 16x Lattice Holes, 2x UART (AT Command + Serial), ADC, I2C, SPI, 4x PWM, 3.3V, GND
  • Energy Provide – 3.3 ± 5% V
  • Dimensions – 24 x 16 x 3 mm
  • Temperature Vary – Working: -20°C to 85°C; Storage: -40°C to 125°C
  • Relative Humidity – 10%~90% (Non-condensing)
  • Certificates – FCC, CE, SRRC, RoHS

The module is offered on Seed Studio for $3.90, however you may additionally discover it on Taobao ($3.50) for twenty-four RMB.

One other various to Feasycom comes with the FSC-BW236 IoT WiFi Module.5GHz WiFi IoT ModuleFeasycom FSC-BW236Specs:

  • Wi-fi SoC – Realtek RTK8720DN MCU with KM4 Arm Cortex-M4 Core @ 200 MHz and KM0 Arm Cortex-M0 Core @ 20 MHz
  • connectivity
    • Wi-Fi
      • 802.11 a/b/g/n WiFi 4 as much as 180 Mbps
      • tx energy
        • 2.4GHz: 17.5dBm (11b), 15.5dBm (11g), 13.5dBm (11n)
        • 5GHz: 8dBm (11a)
      • TCP, UDP, HTTP, HTTPS, and MQTT Protocols
    • Bluetooth
      • Bluetooth 5.0 LE
      • Transmitting energy: +8 dBm
      • gait profile
    • PCB antenna, non-compulsory exterior antenna
  • I/O – GPIO, UART, SPI, I2C, USB . With 36x Reticulated Holes
  • Energy Provide – 3.0-3.6V
  • Dimensions – 26.9 x 13 mm
  • Temperature Vary – Working: -20°C to +85°C; Storage: -55°C to +125°C
dual-band wifi-iot-module block diagram pinout
Block Diagram and Pinout Diagram – Click on to Enlarge

You will discover extra details about the module, together with the datasheet, on the product web page. It exposes extra I/Os than B&T modules, so surprisingly it’s kind of costlier at 40RMB ($5.8) for a single unit, however the value is 30 per piece for orders of greater than 10k drops to RMB.

Extra in regards to the RTL8720DN WiSoC

RTL8720DN Block Diagram
Block Diagram – Click on to enlarge

The Realtek RTL8720DN is designed for BLE beacons, industrial wi-fi controls, Bluetooth gateways, wearable digital gadgets, safety ID tags and good house merchandise.

Software program improvement is completed utilizing the GCC toolchain through the Realtek Wi-Fi SDK, with the corporate recommending Home windows 7 64-bit (which has simply been phased out) or Ubuntu 18.04 64-bit. The applying notice reveals that the title of the sdk is embed-sdk, which you will see that on the Realtek Amoeba web site, together with the schematic and format for the Amoeba RTL8722DM improvement board. As a aspect notice, the board is offered at Good Show for $46.90.

amoeba d development board
Click on to enlarge

Some amiibo processors are supported by the Arduino IDE, Amazon FreeRTOS, and Arm mbed, however I am undecided if that is so for the RTL8720DN and different amiibo D processors for the time being.

Extra details about the processor itself will also be discovered within the RTL872xD datasheet.

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