Microchips projects

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

Hello everyone, today we look at how to easily send e-mails through Arduino using a webserver on internet. We will use Arduino with W5100 Ethernet shield and ESP8266 dev board - NodeMCU in the client mode to send emails through the PHP script that the microcontroller will attach to the client. We will send text that will be pre-defined in the php file to be sent to the specified mail. Most web hosting sites also support extensions as a mail feature, allowing for communication with the SMTP server on localhost (at webhosting service). So we will use the external website on internet that have local SMTP server. With PHP mail function, we can send emails to different email addresses directly from the web site, sending them to the email address of the domain's registrar (your e-mail address) from which these emails will be sent a.k.a. pre-defined e-mail. Tested hostings: php5.sk, sweb.cz PHP file on which we will make request: <?php $msg= "Hello Word!" ; $msg= wor