controller with build-in mic ? 
People Counting…made easy
New Rev of Rak811 tracker showing promise…
HackSpace magazine #11 PDF
Event Date & Time: Thursday September 27th, 12:00 PM EDT
In this free webinar, our wireless experts will cover the following topics:
• An overview of popular IoT wireless technologies
• A review of design considerations
• A comparison of the different technologies
• Recommended application use cases for each technology
• Live Q&A with the presenters
Summit Supercomputer is Already Making its Mark on Science