---
title: "Arduino to the rescue"
url: "https://maker.wiznet.io/nagamma06/projects/Arduino-to-the-rescue/"
markdown_url: "https://maker.wiznet.io/nagamma06/projects/Arduino-to-the-rescue/md"
type: "UCC: User Created Content"
author: "nagamma06"
author_url: "https://maker.wiznet.io/nagamma06/"
original_author: "nagamma06"
original_url: "https://create.arduino.cc/projecthub/aditya7611/arduino-to-the-rescue-dabb7d?ref=part&ref_id=31780&offset=69"
published: "2022-02-28"
language: "en"
hardware: ["DHT22 Temperature Sensor", "Buzzer", "General Purpose Transistor NPN", "Arduino UNO", "Arduino Ethernet Shield 2", "5 mm LED: Red", "Resistor 100k ohm, 1k ohm,,330 ohm, 680 ohm,220 ohm and 4.74k ohm", "micro sd card", "Bitcraze Micro SD card deck"]
likes: 0
views: 201
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Arduino to the rescue

> Arduino to the rescue

Original author: nagamma06 (source: https://create.arduino.cc/projecthub/aditya7611/arduino-to-the-rescue-dabb7d?ref=part&ref_id=31780&offset=69)

## Components

- **DHT22 Temperature Sensor** x 1
- **Buzzer** x 1
- **General Purpose Transistor NPN** x 1
- **Arduino UNO** x 1 ([docs](https://www.farnell.com/datasheets/1682209.pdf))
- **Arduino Ethernet Shield 2** x 1 ([docs](https://docs.arduino.cc/hardware/ethernet-shield-rev2))
- **5 mm LED: Red** x 1
- **Resistor 100k ohm, 1k ohm,,330 ohm, 680 ohm,220 ohm and 4.74k ohm** x 1
- **micro sd card** x 1
- **Bitcraze Micro SD card deck** x 1
- Software: **Arduino IDE** ([docs](https://www.arduino.cc/en/software))

## Article

## ABOUT THIS PROJECT**

It is very well known that when putting a copper and a zinc rod into a potato, a voltage can be measured across the two rods, that is how the potato clock works. However we can take this idea further using a tree. As a tree has a higher volume than a potato, more energy can be transferred from the zinc to the copper. If multiple rods are used in a parallel combination in multiple trees, enough energy can be transferred to power an Arduino board. This is clearly an ideal way to produce energy, and literally one of the "greenest" forms of energy production causing practically no damage to the environment. Arguably it could improve the state of the environment as it incentivises people to grow more trees that clear out the CO2 in the air improving the overall condition of our planet. Another problem that this project addresses is the issue of forest fires, causing a large amount of CO2 to enter the atmosphere, but worse destroying hundreds or even thousands of trees and the natural habitat of countless animals. One of the most effective ways of stopping forest fires is by either catching the fire as soon as possible, or monitoring the conditions of the forest and creating an alert when dangerous conditions arise, i.e high temperature and low humidity. This project uses a DHT22 sensor that monitors the temperature and humidity of the environment, so using the Arduino we can monitor the input readings of the DHT22 and create an output signal if they are hazardous. Additionally this project and also be used to ensure that the plant-life in a certain area has sufficient water to survive, this can be calculated with the average humidity an the dew point (dependent on temperature and humidity), and comparing these values with the equivalent ones of the specific species of plan in said area. One final use for his project (that I can think of) is using the data form the DHT22 (that is saved on a micro SD card) to use the temperature and humidity information form your local area to help a "citizen science" project.

##### the main circuit

![F39eayai6rsg1q9 large rf4te7ewt7](https://hacksterio.s3.amazonaws.com/uploads/attachments/507637/f39eayai6rsg1q9_large_rF4Te7Ewt7.jpg)

---

Source: https://maker.wiznet.io/nagamma06/projects/Arduino-to-the-rescue/