Thunderboard Sense 2: Advanced IoT Development Kit by Silicon Labs

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Thunderboard Sense 2 is a brand new feature-rich development board offered by Silicon Labs that provides a quick path to develop and prototype IoT applications such as battery-powered wireless sensor nodes. The board has a range of sensors and comes equipped with powerful multi-protocol EFR32 radio and Bluetooth connectivity. Thunderboard Sense 2 also has an on-board J-Link debugger and is fully supported in Simplicity Studio. You can also connect the board to a mobile app with Bluetooth for connecting it to the cloud.

With Thunderboard Sense 2 collecting environmental and motion data becomes very easy. Thunderboard Sense kits support multiprotocol wireless connectivity including Bluetooth®, Thread, and Zigbee, and its sleek design is supported by free online analytics dashboard and open source mobile apps.

Thunderboard Sense 2 Onboard Specifications


Wireless Gecko EFR32™

  • Wireless SoC with multi-protocol radio
  • ARM® Cortex® M4 core with 256 kB RAM and 1024 kB Flash
  • Low Energy Consumption
  • Flexible MCU peripheral interfaces

Kit Features

  • 2.4 GHz radio configuration with on-board antenna
  • Segger J-Link Integrated Debugger
  • USB CDC virtual serial port
  • 8 Mbit SPI ultra-low
  • power NOR flash for local storage

Sensors, I/O, and Misc. Control


  • Relative Humidity and Temperature Sensor Si7021
  • UV and Ambient Light Sensor Si1133 
  • Pressure Sensor BMP280
  • Indoor Air Quality and Gas Sensor CCS811
  • 6-axis Inertial Sensor ICM-20648
  • Digital Microphone ICS-43434
  • High brightness LEDs
  • Hall-effect Sensor Si7210

Thunderboard Sense 2 AddOn Features


Mobile App

  • Mobile app for Android and iOS 
  • iOS app implemented in swift
  • Android app implanted in native code
  • Source code available at GitHub

Mobile App Features

  • View sensor data
  • Control LEDs and detect button pushes
  • Stream sensor data to the cloud

Cloud Streaming

  • Data is stored in Firebase
  • The web frontend is implemented in ReactJS
    • Using Alt.js as the flux implementation
    • D3.js for data-driven charts
  • All source code available

Priced at under 20$, I must say this is one of the best IoT and general-purpose development boards in the market today. 


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