https://github.com/ilfuriano/smart_intercom

https://github.com/ilfuriano/smart_intercom

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/ilfuriano/smart_intercom
• Owner: ilfuriano
• Created: 2020-11-30T18:18:03.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-12-05T12:15:44.000Z (about 4 years ago)
• Last Synced: 2024-08-01T21:56:24.646Z (5 months ago)
• Size: 381 KB
• Stars: 15
• Watchers: 3
• Forks: 2
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
# Smart intercom

Simple and cheap circuit for transform the old intercom into a home assistant compatible smart intercom.

### Circuit ([pdf](circuito/circuito_smart.pdf))

For the Urmet 1131/1133:

* 9 -> Buzzer

* 6 -> GND

* CA -> electric lock

#### Urmet 1131



#### Urmet 1133



### Components:

* AC/DC -> LM2596HV AC/DC to DC Buck Step Down Converter Module ([Aliexpress](https://it.aliexpress.com/item/1005001291088100.html?spm=a2g0s.9042311.0.0.27424c4dUYQHFV))

* Relay -> 1 Channel Relay Module 5V High Level Trigger ([Aliexpress](https://it.aliexpress.com/item/4000356150750.html?spm=a2g0s.9042311.0.0.27424c4dJoKZOi))

* Optocoupler -> PC817 ([Aliexpress](https://it.aliexpress.com/item/32835155712.html?spm=a2g0s.9042311.0.0.27424c4dppvLpr))

* ESP8266 MOdule -> Wemos D1 mini

It's strongly recommended to use a High Level Trigger Relay to avoid accidental opening of the door in the event of blackout.

### Home Assistant / EspHome ([YAML](smart_intercom.yml))

There are two entity:

* **switch** for the door opening

* **binary_sensor** triggered when the intercom buzzer rings.