This GSM HAT-board for the Raspberry Pi can be used in combination with a Pi camera to build a hi-tech doorbell. When a visitor rings your doorbell, the camera takes a picture of him/her and sends it in an MMS-message to your cell phone. You can start a telephone conversation via the built-in intercom, and you can even send an SMS to open your front door.
| Réf. | 17700 |
|---|---|
| Constructeur | Elektor Labs |
| Référence de rédaction | 150400-91 |
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