Doorbell

And old RF doorbell rang by scanning a TOTP QR code to trigger a Twitter conversation (2016)

Ates Goral

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Description

An intentionally complex IoT project for the sake of learning: An Onion Omega listening to the @DoorbellRinger tweet stream flips a relay to trigger an RF doorbell when @DoorbellNudger posts a tweet announcing a visitor has scanned a correct TOTP QR Code.