ID Card & Password Scanner MFRC522 RFID

MFRC522 RFID with Arduino Uno

 In this Arduino Tutorial we will learn how to use MFRC522 RFID with Arduino Uno

ESP-01 OVERVIEW:
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Operating voltage:  3.3V volts.

Schema

Code

Arduino Software (IDE)
ID Card & Password Scanner MFRC522 RFID

Library
// - MFRC522 Library: 
https://www.arduinolibraries.info/libraries/mfrc522
// Find All "Great Projects" Videos :
https://www.youtube.com/channel/UCCC8DuqicBtP3A_aC53HYDQ/videos

ESP_01 Max7219 Time Message

IOT MCU ESP 01 DHT11 & MAX7219 LED Matrix Display

  In this instructable we are going to learn how to monitor the temperature and the humidity measurements using the IOT-MCU/ESP-01-DHT11, MAX7219 LED matrix display.

ESP-01 OVERVIEW:
    The ESP-01 is a small size black colored module with 1M memory.
    The ESP8266 is a low-cost WiFi module with full TCP/IP stack.
    The ESP8266 series are produced by Espressif Systems.
    Operating voltage:  3.3V volts.

IOT-MCU ESP-01-DHT OVERVIEW:
    Controller: ESP-01 / ESP-01S (To buy separately)
    Temperature and humidity sensor: DHT11
    Operating voltage: DC 3.7V-12V (It supports 3.7V lithium battery power supply)
    Measuring range: 20-90% RH 0-50 ?,
    Measurement accuracy: Temperature ± 2 ?, Humidity ± 5% RH.

Schema

Code

Arduino Software (IDE)
ESP_01 Max7219 Time Message

Library
// - Adafruit_BusIO Library: 
https://github.com/adafruit/Adafruit_BusIO
// - DHT Sensor Library:
https://github.com/adafruit/DHT-sensor-library
// - Adafruit_Sensor library found at:
https://github.com/adafruit/Adafruit_Sensor
// - MD_MAX72XX library can be found at
https://github.com/MajicDesigns/MD_MAX72XX
// - Programming ESP32 with Arduino IDE:
https://www.youtube.com/watch?v=9b0Txt-yF7E
// Find All "Great Projects" Videos :
https://www.youtube.com/channel/UCCC8DuqicBtP3A_aC53HYDQ/videos

Programming ESP01 with Arduino UNO: 
https://www.youtube.com/watch?v=8j--sRhjUfw