IoT RFID Wi-FI cashless payment system built with an ESP32, Node.js, MongoDB and Vue.js

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This is a cashless payment system built around an ESP32 Wi-Fi microncontroller and an MFRC522 RFID reader.

This system is currently used to pay for coffe in the company I work for. Please note that this system's security is not suitable for high value transations.

The source code is available on my github:

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Amazing project! 2 questions

1. this the RFID work for NFC payments (tap to pay)

2. are you connected on wifi or a data stick?

NLIS
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One more question. How do you setup the RFID tag with the website? I'm quite a newbie here and can't see much documentation. Many thanks beforehand.

ilikememes
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Hi, great video ❤
I have some question if you don't mind, do you thing I can do payment system that involving nfc card by using esp8266 and pn532?

zerocho
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Hello sir
I have made a similar project called RFID attendance system using esp8266.
I want to add the buzzer tune which you have implemented in your project. Can you please provide me the code for it as your's is for esp32 and I want for esp8266.

Can you also help me in the circuit as I have a 5v buzzer and esp8266 gpio pin outputs 3.3v. so the buzzer's volume is too low.

nachiketart
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Hi, nice project, one question can be used or implemented with an esp8266? Thanks!

Crakkovia
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Certification expired for taobao? What does this mean?

ilikememes
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What library did you use for the OLED display?

christiansalvadora
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Nice! I have a question. How can i install the database and server (like that u have on the tablet)
Pls help!!!

kpgaming
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how do you add take payment and add credit to the cards?

MyGSunny
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Noob question. What variant of ESP32 are you using? Theres different variant of ESP32 im so confused. WROOM, CAM, 32 pins, 38 pins and esp32s

bswill
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What method did you use to create this system? Thank you

AnyoneElz
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Is this possible on a protoboard? Technically I think it is. But still in doubt

ilikememes
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Do you have a tutorial on this project

foxxypooyt
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Hello! This is a great idea! I was thinking that maybe you can help me create this because I am planning to do this in our school to avoid physical contact to other people. I hope that I can get a reply from you! :)

minemine
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hi, what plataform this app was build?

xfontoura