Protecting your outdoor plants from frost damage is crucial, especially during colder months. A DIY frost alert system can help you monitor temperatures and take action before your plants suffer. Here’s a step-by-step guide to building one:

1. Gather the Components: You’ll need a temperature sensor (like a DS18B20), a microcontroller (such as an Arduino or Raspberry Pi), a buzzer or LED for alerts, and a power source.

2. Set Up the Sensor: Place the temperature sensor near your plant boxes, ensuring it’s shielded from direct sunlight and rain. Connect it to the microcontroller.

3. Program the System: Write a simple script to monitor temperature readings. Set a threshold (e.g., 35°F/2°C) to trigger alerts when frost is imminent.

4. Add Notifications: Integrate Wi-Fi or GSM modules to send alerts to your phone or email. Alternatively, use a buzzer or LED for local alerts.

5. Test and Adjust: Calibrate the system by comparing its readings with a reliable thermometer. Fine-tune the alert thresholds as needed.

With this frost alert system, you’ll be able to protect your outdoor plant boxes proactively, ensuring your plants thrive even in chilly weather.