Overview This project is an attendance system using RFID tags/stickers to communicate with an MFRC522 RFID Reader/Writer Module that is connected to an Arduino UNO. The authentication data that is received by the Arduino UNO is then transmitted to Google Spreadsheets through an ENC28J60 Ethernet Module for real-time data storage
Overview This project measures the temperature and humidity of the surroundings using the DHT22 sensor. Also, the gathered data is then sent to the user's mobile phone using the SIM800C GSM module. SIM800C is a type of module that uses GSM to communicate. GSM, or Global System for Mobile Communications, is the most popular cell phone standard in the world.