Hi Hacker News! We're Carmen and Zsombor, the co-founders of Berkanan (https://berkanan.chat https://berkanan.chat), a YC Startup School 2019 graduate (https:/

Hi Hacker News! We're Carmen and Zsombor, the co-founders of Berkanan (https://berkanan.chat https://berkanan.chat), a YC Startup School 2019 graduate (https://www.startupschool.org/companies/berkanan https://www.startupschool.org/companies/berkanan). We're building a Bluetooth-powered offline messaging service for crowds and we invite you, app developers, to join us on our mission! Today we're excited to release BerkananSDK (https://github.com/zssz/BerkananSDK https://github.com/zssz/BerkananSDK) — an open-source SDK that unites apps into a shared Bluetooth service. How it works from a user's perspective: Launch an app with BerkananSDK on your device. Type in a message for the crowd around you and hit send. The app will broadcast your message to all apps with BerkananSDK in range. The range is about 70 meters, but your message can reach further because it's retransmitted by receiving apps. We're very excited about this and its benefits for the community, especially in emergencies, and we believe it can be enabled if multiple apps join forces. Looking forward to reading your thoughts, ideas, and suggestions!