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Despite the fact that making a hilarious yet not deceitful joke with a jack-o'-lantern on Halloween night is not unobtrusive, I decided to create an exceptional event for my guests on Halloween when they ring the doorbell by designing a jack-o'-lantern doorbell with intriguing features. And, not surprisingly, I only let some of my closest friends know about my new doorbell features by giving them registered RFID tags (entrance permits) to make my other guests frightened even a little bit :) In detail, this doorbell talks to the guests and informs the user via WhatsApp when the guests ring the doorbell or show RFID tags or cards.


First of all, to make the doorbell talking with the guests after an interaction, I generated voices from texts for each occasion I wanted the doorbell to talk. You can get more information about how to create voice files over text files in the following sections.


To be able to get notified via WhatsApp after an interaction, I created an application on the Raspberry Pi, including Twilio's API for WhatsApp. And, I utilized an Arduino Nano 33 IoT to communicate with the application on the Raspberry Pi.


Then, to play the voices I generated with the Arduino Nano 33 IoT, I used a DFPlayer Mini MP3 Player with a speaker. And, to read and register UIDs from RFID tags or cards, I used an MFRC522 RFID Reader.


Finally, I included a DC184 Yellow Pushbutton as the doorbell button and RGB common cathode LEDs as the eyes of the jack-o'-lantern.

After completing my design on a breadboard and testing the code, I designed a PCB (WhatsApp RFID Talking Doorbell) with a unique jack-o'-lantern shape with an angry facial expression to create a suitable and wicked doorbell for Halloween :)


Huge thanks to PCBWay for sponsoring this project.


For more information:


https://www.theamplituhedron.com/projects/WhatsApp-Halloween-Themed-RFID-Talking-Doorbell-with-RGB-Eyes/



https://www.theamplituhedron.com/projects/WhatsApp-Halloween-Themed-RFID-Talking-Doorbell-with-RGB-Eyes/

Nov 12,2020
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