| Component | Specification |
| Microcontroller | Arduino Uno R3 |
| LCD | LCD 16 × 2 with I2C |
| Relay | SRD-05VDC-SL-C |
| GSM | The GSM/GPRS A6 |
| Keypad | 4 × 4 keypad |
| Step-down transformer | Center-tapped 220/12 V/2 A |
| Voltage Regulator | 7812, 7805 |
| Resistors | 10 kΩ, 1 kΩ and 200 Ω |
| Capacitors | 2200 µF |
| Bulb | 7 W |