In the world of smart homes, off-the-shelf solutions like Alexa or Google Home are great, but they often lack the granular control that a developer craves. Recently, I decided to take matters into my own hands and automate my home office using a Raspberry Pi 4 and Python.

The Setup

I started with a Raspberry Pi 4 Model B. Its GPIO pins are perfect for controlling relays and reading sensor data. My goal was simple: control the lighting based on ambient light levels and manage the cooling fan for my server rack based on temperature.

The Code

I used the RPi.GPIO library for pin control and dht11 for temperature sensing. The core logic runs in a simple Python loop, checking sensor data every minute.

```python import RPi.GPIO as GPIO import time

... setup code ...

while True: temp = read_temp() if temp > 30: GPIO.output(FAN_PIN, GPIO.HIGH) else: GPIO.output(FAN_PIN, GPIO.LOW) time.sleep(60) ```

Integration

To make it accessible, I built a lightweight Flask API running on the Pi. This allows me to trigger the lights or fan from my phone or desktop without needing a physical switch. It’s a simple project, but it highlights the power of combining hardware with Python's ecosystem.

Next Steps

I plan to integrate this with my Discord bot, so I can type !lights on in my private server to control the room. The possibilities are endless when you control the hardware!