In this illustration we will going to wire the ESP8266 Module on Arduino but before we can proceed we need to setup the ESP8266 module using AT-COMMAND please refer to this link. As you can see the illustration below our
Wiring and flashing the ESP8266 ESP201 WiFi Transceiver
This is the other model of ESP8266 module, this board has similarity with the ESP8266 V1, ESP8266 7, ESP8266 12E, the difference of this board has an on-board SMD SMC antenna and extra IO port, this module has self-contained SOC
RFID RC522 Gate Access Control with Arduino
In this illustration we will going to wire the RFID (Radio Frequency Identification) Module RC522 in this module it uses a radio signals and a Radio Label Tags for reading and writing data. How RFID works please refer to this
Using Password Access Control on Matrix Keypad with Optocoupler Relay
These tutorial will guide you to make a password access control using “Keypad Membrane” connected to a Relay Module, Were just temporarily used LED for the output just to check if it is working, instead using a mechanical solenoid door