RIO 40C: Smart Sunburn Monitor



is a smart wearable device that can prevent sunburns.


Daniel De Godoy Peixoto, Jia Ji



Developed for the SEAS-Rio Design Challenge: Sensing and the City, RIO 40C is small device that can be attached to a hat or a bag to capture the UV intensity under which the user is exposed. The first fully-functional prototype constantly sends readings from  a set of sensor to a smartphone that uses an android app that the group programmed to interpret the data. The RIO 40C app process the data and assist the user to insideRio40cavoid harmful situations, giving information like the percentage of the recommended daily UV energy that the user have been exposed or how much time should the user spend under the current condition to avoid a sunburn.

The overall goal of the project is to provide a

  • Low Cost
  • Wearable
  • Wireless
  • Multi sensor
  • Smartphone compatible
  • Personal UV indicator


RIO 40C combines low-power electronics and IoT techniques to provide maximum feedback using minimum resources. The compact design of the sensing node has no buttons of LEDs , it uses a remote application running on a smartphone to interface with the user. The device runs with a standard 3.3V coin cell battery and has an expected lifetime of 2 months in continuous operation.


A demo and presentation were done at the Open Innovation Day promoted by Engineering Institute of Federal University of Rio de Janeiro (COPPE/UFRJ) and Columbia School of Engineering (SEAS) in June 2016.


Columbia-Rio design Challenge in the News: [EN] [PT] [PT] [PT]

ji and daniel