Update README.md

README.md

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 `A simple list of steps indicating how one can run and test the project.`
 
+## Principles and purpose
+
+`This is a Electrical Engeneering project of the School of Engineering of São Carlos, from the subject SEL0373 - Projects in Internet of Things. This project has the purpose of recreating, in a smaller scale, a space probe that is capable of acquiring data such as climate, location, height and taking photos and sending this collected information to a website.`
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+`The project is divided in two parts, the first being the probe itself, that is made using a ESP32-S3-DevKitC-1 with the following external sensors and peripherals: GNSS, NEO-M8N, BME280, MPU6050, DHT22, Buzzer and a OV8258 camera. The firmware of the probe is a RTOS that organizes all the collected data and sends it to a server.`
+
+`The second part of the project is responsible of collecting the data in the server and displaying it in a website. The data is stored in a MongoDB Database, that receives and sends information to the probe. The data received are all from the sensors, which consists as enviromental information: current date and time, humidity, temperature and probe information: acceleration, angle, geographical coordinates. The website is created on the open-source web application framework Angular, based on Javascript. The website [Sharp Probe](https://sharpprobe-fernando-zanchettas-projects.vercel.app/ “Sharp Probe”) collects the information sent to the server and displays it in the frontpage, also it has the button "Requisitar Foto" to send a MQTT message to the probe, via server, that when receives it, takes a photo and sends it back to the website that displays it.` 
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