Smart Doorbell is an Internet of Things (IoT) project, integrating a doorbell with a user's smartphone. This project uses a NodeMCU board which includes the ESP8266 low-cost Wi-Fi microchip.
| Item | Description | Amount |
|---|---|---|
| NodeMCU | Single board microcontroller | 2 |
| TTP223 | Capacitive touch sensor | 1 |
| Relay 1 channel | 1 channel relay 5V with optocoupler high quality | 1 |
| Round alarm baby bell | Small bell 55mm dimension with 220Vac | 1 |
| LED | 5mm super bright blue color light | 3 |
| Total Cost | IDR 118.500 / $8.5 (approx) | |
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