Microchips projects

I would like to introduce you to the project that I realized during this year during the holidays. I created a web-based system for horticulture that specializes in the sale and cultivation of various kinds of plants, trees, flowers ... Web-based system has been designed to meet the following requirements: Temperature record, rain level, output activity record Heating / cooling control based on temperature Irrigation management at set times or on demand with weather condition counting statistics Remote restart boards Logs Login system Arduino Mega 2560 (1280 was enough too) was used as the control microcontroller, as Uno was on the edge with memory and was severely jammed. Arduino Mega was a great choice thanks to a sufficient number of pins and especially great memory for a program with a larger RAM memory. Arduino sends temperature and rain data to the Web via the Wiznet W5100 Ethernet Shield. The temperature is read out digitally from the DS18B20 sensor and the rain re

Today, I'd like to introduce the system I've been developing last week. I made an RFID system to open the electronic door. The system is built on components for Arduino, ie a 13.56MHz RC522 card reader and keypad, compatible cards and keychains. The reader is able to read the ISO / IEC 14443 A standard cards. This standard also works on ISICs, ATMs, or busses, and can also be read and used for such a project. By reader, I read the MAC address of the cards (it can also be read and write in the memory of the cards and the key, which is mostly 1kB or 4kB), the MAC addresses I read to convert to a specific DEC format. In the role of the microcontroller for processing and sending data, I used a NodeMCU board that has wifi connectivity and is more than adequate for this purpose. The system is suitable for halls, corporate entrance gates, electronic doors and similar applications. The task of NodeMCU is to send data to the web backend whenever it logs the card and opens or unlocks