RIFD -> AWS

################
# ARDUINO PART #
################
#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN 9
#define SS_PIN 10 //SDA
#define SCK_PIN 12
#define MOSI_PIN 13
#define MISO_PIN 11

MFRC522 mfrc522(SS_PIN, RST_PIN);
MFRC522::MIFARE_Key key;

void setup() {
    Serial.begin(9600);
    while (!Serial);
    SPI.begin();        // Init SPI bus
    mfrc522.PCD_Init(); // Init MFRC522 card
    Serial.println("Setup complete. Ready to scan cards.");
}

void loop() {
    // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
    if ( ! mfrc522.PICC_IsNewCardPresent())
        return;

    // Select one of the cards
    if ( ! mfrc522.PICC_ReadCardSerial())
        return;

    // Get the basic card UID number and send it over the Serial port
    dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
    Serial.println();
    delay(1000); //wait one second before we scan again
}

/**
 * Helper routine to dump a byte array as hex values to Serial.
 */
void dump_byte_array(byte *buffer, byte bufferSize) {
    for (byte i = 0; i < bufferSize; i++) {
        Serial.print(buffer[i] < 0x10 ? "0" : "");
        Serial.print(buffer[i], HEX);
    }
}

###############
# Python Part #
###############

import serial  #pip install pyserial
import sys
import boto3   #pip install boto3

# Create Ubuntu instance on aws ec2
def create():
	ec2 = boto3.resource('ec2', aws_access_key_id = access_key, aws_secret_access_key = secret_key)
	instance = ec2.create_instances(ImageId='ami-0eb3e12d3927c36ef', 
		InstanceType='t2.micro',
		KeyName='nick-python-central',
		MinCount=1, 
		MaxCount=1)
	print("Instance Created:")
	instanceid = instance[0].id
	print(instanceid)

# terminate all your ec2 instances
def destroy():
	ec2 = boto3.client('ec2', aws_access_key_id = access_key, aws_secret_access_key = secret_key)
	response = ec2.describe_instances()
	for reservation in response["Reservations"]:
		for instance in reservation["Instances"]:
			ec2.terminate_instances(InstanceIds=[instance["InstanceId"]], DryRun=False)
			print("Terminating instance:")
			instanceid = instance["InstanceId"]
			print(instanceid)


print("Starting")

print("Reading kwargs")
serial_device = sys.argv[1]
keys = sys.argv[2]

print("Reading aws keys")
lines = open(keys, "r").readlines()
access_key = lines[0].strip()
secret_key = lines[1].strip()

print("Binding functions to RFID cards")
functions = {
	"5261F10E":create,
	"52F7180E":destroy
}

# Read the card UID's over the USB port from the arduino. 
print("Attaching to serial port")
with serial.Serial(serial_device, 9600, timeout=1) as ser:
	while True:
		line = ser.readline().decode("utf-8").strip()
		if len(line) == 8:
			print(line)
			functions[line]()
		elif len(line) > 0:
			print(line)