ARDUINO LIBRARY FOR LOGGING TO I2C-EEPROM

1. Swipe RFID card
2. Check, if it is in the EEPROM -return name of cardholder(also stored in EEPROM)
3. If so, chek pin-code(in EEPROM)
4. If correct, log some data in EEPROM

Example of stored information

Entry,RFIDTAG*******,NameMax20Char,pin***,misc 123,4E00A71C7580,Benny Andersson,1234,1011

Example of logged information

Entry,RFIDTAG*******,Date&Time,a number,a byte 123,4E00A71C7580,01012015-13:30,9999,240

• RFID tags in EEPR- OM needs to be numbered, 1,2,3....
• Needs some way to check how many entrys there are
• Needs some way to access/delete a whole entry
• Need some function to maintain EEPROM, delete, verify, update rfid-list.

Byte orders

• 0x0000 1-byte Valid signal
• 0x0001 2-byte Num of card

Entry,RFIDTAG*******,NameMax20Char,pin***,misc 123,4E00A71C7580,Benny Andersson,1234,1011

Max 160 cards Card address (49 bytes)

• 0x0003 5-byte Entry
• 0x0008 13-byte RFID Tag
• 0x0014 20-byte Name
• 0x0028 5-byte Pin code
• 0x002C 5-byte Misc
• 0x0030 1-byte (NULL)Space between each items

Entry,RFIDTAG*******,Date&Time,a number,a byte 123,4E00A71C7580,01012015-13:30,9999,240

Log address (49 bytes)

• 0x8192 2-byte Num of log items

• 0x8194 5-byte Entry

• 0x8199 13-byte RFID Tag

• 0x8192 20-byte Date time

• 0x8192 5-byte A word

• 0x8192 5-byte A byte

• 0x8192 1-byte (NULL)Space between each items

Memory Organization

Max 160 cards Max 490 log items.

Card address (49 bytes) Log address (49 bytes)

• 0x0000 1-byte Valid signal

• 0x0001 2-byte Num of card

• 0x0003 5-byte Entry

• 0x0008 13-byte RFID Tag

• 0x0014 20-byte Name

• 0x0028 5-byte Pin code

• 0x002C 5-byte Misc

• 0x0030 1-byte (NULL)Space between each items

• 0x8192 2-byte Num of log items

• 0x8194 5-byte Entry

• 0x8199 13-byte RFID Tag

• 0x8212 20-byte Date time

• 0x8232 5-byte A word

• 0x8237 5-byte A byte

• 0x8242 1-byte (NULL)Space between each items

Contribution

• Any contribute please make a pull request.
• Free to use for any purpose. Use at your own risk.