@heythisisnate thanks for all that you’ve done to make the integration of retro alarm systems and Smartthings a reality. I recently converted an old Brinks system consisting of 4 door sensors, 2 motion sensors a smoke detector and siren requiring 2 Node MCU’s. The siren was just a speaker so I purchased an Elk 100 Siren Driver which requires 12V. Here’s a photo of the install:
Regarding the door chime feature, would it be possible to use the same siren speaker for this or does the Piezo buzzer generate the sound when voltage is applied? If it is possible to use the siren speaker, I believe I’ll need to add a diode to prevent an overload of the Node MCU when the siren is activated. Please let me know and again, thanks for everything you’ve done.