Environmental knowledge is essential for understanding the affect of human actions on our planet. Nevertheless, the accuracy and reliability of this knowledge are sometimes questioned as a result of lack of transparency within the knowledge assortment course of. Blockchain expertise will help deal with this problem by offering a tamper-proof and clear approach of storing environmental knowledge. On this weblog submit, we are going to discover the right way to use a Raspberry Pi to gather environmental knowledge and retailer it on the Ethereum blockchain.
Use Case:
Suppose you might be an environmental scientist learning the affect of air air pollution on a selected area. You need to accumulate knowledge on the focus of varied pollution within the air and retailer it in a approach that’s clear and tamper-proof. You resolve to make use of a Raspberry Pi to gather the info and retailer it on the Ethereum blockchain.
{Hardware} Necessities:
- Raspberry Pi: A small, low-cost laptop that may run Linux-based working programs
- Sensors: Sensors to measure air air pollution akin to carbon monoxide, sulfur dioxide, nitrogen dioxide, and many others.
- Web Connection: A dependable web connection to hook up with the Ethereum community
Software program Necessities:
- Web3.py: A Python library for interacting with the Ethereum community
- Solidity: A programming language for writing good contracts on the Ethereum community
- Remix IDE: An internet built-in improvement surroundings (IDE) for writing and testing Solidity good contracts
Implementation:
Listed below are the steps concerned in implementing this use case:
Connect with the Ethereum community: To hook up with the Ethereum community, you should use an present library akin to Web3.py, which gives a Python interface for interacting with Ethereum. Set up Web3.py by working pip set up web3 in your Raspberry Pi terminal.
Create a wise contract: A sensible contract is a self-executing contract with the phrases of the settlement between the client and vendor being immediately written into traces of code. You may create a wise contract utilizing the Solidity programming language, which is essentially the most generally used language for writing good contracts on the Ethereum community. You should use a software like Remix IDE to jot down and take a look at your good contract.
Gather knowledge: Gather knowledge from the Raspberry Pi utilizing sensors. You should use Python libraries akin to gpiozero or smbus to learn knowledge from sensors.
Format the info: Format the collected knowledge right into a JSON object or some other format that may be simply handed to the good contract.
Name the good contract operate: You may name the operate within the good contract that accepts the formatted knowledge as a parameter. This may be finished utilizing the Web3.py library.
Retailer knowledge on the blockchain: As soon as the operate known as, the info is saved on the Ethereum blockchain, the place it’s immutable and accessible to anybody with the mandatory permissions.
This is a pattern code construction that you should use as a place to begin:
Observe: Within the above code, exchange <YOUR_INFURA_ENDPOINT> with the Infura endpoint URL that you simply need to use for connecting to the Ethereum community. Additionally, exchange <TEMPERATURE_VALUE> and <HUMIDITY_VALUE> with the precise temperature and humidity values that you simply need to retailer on the blockchain.