Access control / Log for Coffee Grinders, using RFID cards (13.56MHz)

From “Blynk” app you can set:

• ON time for the grinder (0.1 sec = 1 unit in app)
• Lock / Unlock the issued RFID cards (realtime) -> Select a User -> Push “Lock/Unlock” button
• Turn ON the grinder for “Guest” in app → Push “Grind Now for Guest” button
• Replace a “Lost Card”  -> Select a User ->  Push “Lost Card” button -> approach a New Card to the RFID module
• Reset the counters to “0”, for all Users → Push “Reset” button

Hardware Components:

• Wemos D1 Mini or NodeMCU (ESP8266)
• RFID module – MFRC522
• RFID cards/tags (13.56MHz)
• SSR to control the Grinder

Software:

• install “Blynk” app from Play Store / App Store.
• Create a “Blynk” account
• Scan the provided QR code for this project (you need to buy some “Energy” points)
• Check the Blynk1,2,3 pictures for the next steps
• Copy the provided Libraries to Arduino > Libraries directory
• Replace the “xxxxxxx” in the code, with your “blynk_token” received from Blynk
• After programming the WiFi module, connect to the “CoffeLOG” network Access Point, started by the WiFi module
• Type this IP address in your web browser, to access the device Config Portal: 192.168.4.1
• Configure WiFi > Select your WiFi network > Insert the Password  > Save.
• Now, after AutoRestart, the module should be visible in the Blynk app.

Note: while the grinder is ON, the communication with Blynk app is interrupted.

You can download the Sourcecode and Schematic from Github.