Ring Intercom smart DIY upgrade is a retrofit gadget that gives

Installing a Ring Doorbell in an older home with an Intercom system.

Ring Intercom by Intercom upgrade, Remote Unlock, Works with Alexa, Two-Way Talk (check compatibility) : : DIY & Tools

Retrofit Alarm Kit, Wired to Wireless Bridge

Ring Retrofit Alarm System Review

Review Ring Video Doorbell Pro, A Powerful Smart Home Device - Gearbrain

Ring Intercom by Intercom upgrade, Remote Unlock, Works with Alexa, Two-Way Talk (check compatibility) : : DIY & Tools

Ring Intercom

Make your intercom smarter with an MQTT backpack (2021) - Michael Stapelberg

Nuki Opener - Smarten up your intercom.

DIY Smart Home Video-Doorbell with ESP32 and Raspberry Pi [ENG]