Matrix 4x4 Keypad Alarm
This project connects a 4x4 keypad module to a raspberry pi.
The setup is as follows:
Keypad setup
| Leypad PIN (Left to Right) | Raspberry Pi 3 PIN |
|---|---|
| PIN 1 (Col 1) | GPIO 19 (pin 35) |
| PIN 2 (Col 2) | GPIO 13 (pin 33) |
| PIN 3 (Col 3) | GPIO 6 (pin 31) |
| PIN 4 (Col 4) | GPIO 5 (pin 29) |
| PIN 5 (Row 1) | GPIO 21 (pin 40) |
| PIN 6 (Row 2) | GPIO 20 (pin 38) |
| PIN 7 (Row 3) | GPIO 16 (pin 36) |
| PIN 8 (Row 4) | GPIO 26 (pin 37) |
Tweet setup
The tweeter plays a specific sound when the alarm is armed and disarmed.
| Tweeter PIN | Raspberry Pi 3 PIN |
|---|---|
| + | GPIO 4 (pin 7) |
| - | Ground (pin 6) |
LED setup
The LED is turned on when the alarm is active.
| LED PIN | Resistor | Raspberry Pi 3 PIN |
|---|---|---|
| long leg | 330 Ohm | GPIO 18 (pin 12) |
| short leg | Ground (pin 14) |
Loxone communication
In Loxone I have setup UDP inputs and outputs to keep the Central Alarm block in sync with my setup.
HttpWebserver
This project is added because I initially used it for Loxone communication but no longer use it. It can be enabled and used for monitoring if necessary.