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Bluetooth Smart allows for short bursts of long-range radio connections, making it ideal for applications that depend on long battery life and don’t need high throughput streaming data. To help users get familiar with our new EFR32 Blue Gecko family, we are inviting three community users who can create a project or a hands-on review based on the EFR32 Blue Gecko starter kit ($99.99) and share it with other members. 


How to participate:

If you are interested, submit up to two ideas for new projects or anything particular you want to test/evaluate with the kit by leaving a comment on this page by March 28th, 2016. 


Make sure to mention what features of the Blue Gecko family you would like to use in your project/review post and why. If you want to learn more about the family, check out these pages: 


Blue Gecko SoC product page

Blue Gecko start kit page

Blue Gecko Documentation



The submissions will be evaluated based on the following criteria: 

  • Energy efficiency (50%)
  • Usefulness (30%)
  • Originality (20%)

and will be judged by Silicon Labs' Wireless team. 



Number of Winners: 3

Prize: 1 x EFR32™ Blue Gecko Bluetooth Smart Wireless SoC Starter Kit


Contest Period:

March 14, 2016 - March 28, 2016 11:59 pm PST
The winners will be announced on this page.



  • The three winners are required to publish a project/review post in the community by 14th May 2016. We will send them a guideline and a template to fill in.
  • By entering the contest you acknowledge that you have read and agree to the Community Contest Terms and Conditions. Please review the Contest Rules below before entering the contest.

  • Projects
  • I want to make a music making device that will send MIDI data over BLE. Something similar to this one I created with the Intel Curie:

    I'd like to compare the two as far as ease of use/programming. If you guys would like to take it a step further and "sponsor" me, I'd love to lay out a PCB to make something smaller than the dev board. 

  • Too bad. I would really like to test it, and even have a cool project to use the BlueGecko. But I know will never be finished until May Robot Sad So skip it for this time, and lets hope there will be another chance...

  • to err is human - big faceless corp neither confirms nor denies any error was made, will be made, or that any of our "employees" are human.

  • Sometimes a picture is worth a 1000 words Smiley Very Happy

  • If I were to receive the honor of evaluating this kit, I would put SI Labs hardware in the running for the following projects:


    a) a HAZMAT supply chain security monitor/logging device which needs to operate for days in hibernation mode.

    b) a safety and security monitor/logging device for certain supply chain fleet equipment.


    Both solutions would implement things like super capacitors/energy harvesters and would be accessed by authorized personnel using smart phone apps.

  • EFR32BG Blue Gecko is great choice for it to use in shopping malls as a beacon.
    The EFR32BG will broadcast product info and help customer to find the product by show them the product distance so they can easily get there, the customer can also look for offer or find other near product or buy them directly as it support Ethernet. All we need will be an Mobile App supporting BLE to communicate. Cool isn't it! Smiley Wink

  • Hi, @hlipka 


    If you are interested in testing it, I recommend creating an entry about your idea on what features you want to test and let our judges decide. 


    We are looking for not only an EFR32 BG based project but also a hands-on review post. 

  • OK, if you don't insist on a finished project: my project would be a soil moisture sensor for our garden. In parts of our garden we are using a stone granulate on top of the soil since this keeps the water in the soil (and the weeds away), but it means you don't see easily how wte/dry the soil actually is. So I want to build a solar-powered moisture sensor (using one of the Si70xx humidity sensors) and transmit the data to a Android tablet. This would use the radio board only, but not need to "get started" board with the display. I would like to check the actual energy consumption, maybe I can even skip the solar-power part and have it run on a battery only.
  • I want to design a control system for conventional lighting bulbs. I will communicate to a Zigbee gateway, so it can be managed from an application.

  • Hello,


    I want to use the Blue Gecko to realize two projects because of it´s low power consumption. Both projects shoud be powered by a single CR2032 coin cell battery.


    1. Temperature/humidity-logger:

    Temperature and humidity are recorded over a certain period and can be read with an app. The course of temperature and humidity can now be evaluated in a diagram .





    2. Hight-logger for model rockets (or hiking)

    A small PCB with the Blue Gecko and a barometer should log the pressure over a defined time. After the model rocket has landed, you can read the pressure (hight) via an app and can be displayed in a chart. Perhaps it is also possible to implement an acceleration sensor.