The EnviroDIY Mayfly Data Logger was recently certified by the Open Source Hardware Association (OSHWA), verifying that the project meets all the criteria for open-source compliance. The current Mayfly Data Logger v1.1 is now listed in the directory of OSHWA’s certified projects, along with over 3,200 other open projects from around the world.

The Mayfly Data Logger project has been an ongoing effort by the Stroud Water Research Center for more than 10 years. It has evolved through 9 different design updates over that period, all of which were openly shared to some extent, but this is the first time the project has been officially certified by OSHWA. All of the project’s design files are shared on the EnviroDIY website and on GitHub. Shannon Hicks, the designer of the Mayfly hardware, has been active in the open source community since the beginning of the project. Most recently, Shannon attended OSHWA’s Open Hardware Summit in Scotland last May as an Ada Lovelace Fellow to give a presentation on how EnviroDIY has used the Mayfly Data Logger for a variety of monitoring tasks, and also to help lead a discussion panel on open source environmental monitoring. Other international open source conferences include the Gathering for Open Science Hardware (GOSH) meetings in Panama (2022), Toronto (2019), and Santiago, Chile (2017).

The Mayfly Data Logger’s certification news has already been mentioned by Microchip (makers of the ATmega processor at the heart of the Mayfly) and by hackster.io. On March 19, Shannon will be giving a presentation during OSHWA’s Show & Tell Monthly livestream on YouTube, where they highlight newly certified projects.