Final Project: an IoT/Embedded project

Summary: you will build an IoT/Embedded program that will simulate a credit card payment kiosk

Note: I have a limited number of kits available from my personal stuff. If there are lots of interest for this project we'll have to do it on a first come first served basis.

Unpacking some details: 

• Learning the components. First you need to learn about your hardware bits
• Have a quick look at a tutorial for getting the LCD panel working with the Pi
• For more in the video with less 'go look at my links" This video is a good choice.
• there are several tutorials for getting the RC522 rfid reader hooked up to the raspberry pi. None of them are perfect but this one is as good a place to start as any.
• Building the project.
• you need two programs for this project.
• a simple server program that lives on an amd64/x86 based computer. Its only job is to listen on a port for a "credit card transaction" and then when it receives the information, records the "card number" (the RFID number) and the amount of the transaction in a text file.
• assume that each card has a prapaid limit of $150. If the RFID tag has not exceeded its $150 limit in the transactions so far, respond positively to the client.
• If the RFID tag has exceeded its allowed limit in all its transactions so far, then send a denied message back to the client.
• The Embedded client which will run on a raspberry pi.
• have a button that begins a new transaction.
• undergrads: randomly select an amount for the transaction from $1 to $100
• Grads: use a rotary 'sensor' to let the user select an amount from $1 to $100
• Once the amount is selected, display the amount on the lcd panel.
• After 3 seconds, blink the LED (which simulates the blinking arrows on an actual credit card machine.
• Then poll/query the RFID reader to find the 'card number'
• send the "card number" and the amount to the server; wait for the server's reply.
• If the server replies positively, inform the user of transaction success on the LCD panel
• If the server replied negatively, send a "transaction denied" message to the user VIA the LCD panel.

After you submit your code via blackboard, be sure to return any kits that I lent to you.