The Difference Between NFC and RFID – Explained

By , October 13, 2014 4:42 AM

The Difference Between NFC and RFID – Explained

RFID and NFC are two closely related wireless communication technologies that are used globally for a vast number of applications such as access control, asset tracking and contactless payments. RFID was first patented in 1983 and is the precursor to NFC, so we will begin there.
Radio Frequency Identification (RFID)
RFID enables a one way wireless communication, typically between an unpowered RFID tag and a powered RFID reader. RFID tags can be scanned at distances of up to 100 meters without a direct line of sight to the reader and as such RFID is used globally for asset tracking in warehousing, airport baggage handling, livestock identification and much more. RFID operates at a range of radio frequencies each with their own set standards and protocols.
RFID Frequency Band
Scan Distance
120-150 kHz (Low Frequency, LF)
Up to 10 cm
13.56 MHz (High Frequency, HF)
Up to 1 m
433 MHz (Ultra High Frequency, UHF)
1-100 m
865-868 MHz & 902-928 MHz (Ultralight High Frequency, UHF)
1-2 m
2450-5800 MHz (Microwave)
1-2 m
3.1-10 GHz (Microwave)
Up to 200 m
Near Field Communication (NFC)
NFC operates at 13.56 MHz and is an extension of High Frequency (HF) RFID standards. NFC therefore shares many physical properties with RFID such as one way communication and the ability to communicate without a direct line of sight. There are however three key differences.

1. NFC is capable of two way communication and can therefore be used for more complex interactions such as card emulation and peer-to-peer (P2P) sharing.

2. NFC is limited to communication at close proximity, typically 5cm or less.

3. Only a single NFC tag can be scanned at one time.

These properties were developed primarily to enable secure mobile payments and it is for this reason NFC is limited to singular and close proximity interactions. An important by-product is that NFC is now available in the majority of mobile phones and this is perhaps the most important difference between NFC and RFID.

NFC-enabled phones offer both businesses and day-to-day users slick and intuitive communication between mobile phones and between a mobile phone and an NFC tag. Examples include file sharing via Android Beam, instant connection setups between electronic devices and the ability to link everyday objects such as posters to online content. For more great NFC ideas – click here.

Operating Frequency
13.56 MHz
13.56 MHz
One way
Two way
ISO 14443, 15693, 18000
ISO 14443
Scan Distance
Up to 1 m
Up to 10 cm
Scan Tags Simultaneously


By , September 3, 2014 12:21 PM


to connect to the serial port use putty

select the COM port and settings can be

When the port is selected click Ok, to get to the Port configuration form

On this form specify the port settings.

The most common port speeds for GSM phones and modems are 9600, 19200, 57600 and 115200.

The Data bits should be set to 8. The Parity to none the Stop bits to 1 and the flow control should be hardware.

Set the appropriate serial port (usually COM1)
Baud rate (speed) = 9600
Data bits = 8
Stop bits = 1
Parity = N



Will give you a response OK if you are connected

I can check in PuTTY GSM modem information using commands:
Manufacturer: AT+CGMI -> “WAYECOM MODULE”
Model: AT+CGMM -> “MULTIBAND G850/900E/1800/1900MHz”
Revision: AT+CGMR -> “652B09gg.Q2406B 1961548 103107 17:50”

VMware Vcenter corruption

By , March 3, 2014 4:27 PM

mount -n -o remount,rw /

e2fsck -f /dev/sda3


By , February 10, 2014 1:50 PM

0 VMN A0
1 VMN A1
6 VMN B0
7 VMN B1

Duplicate Outlook 2013 Calendars and how to remove them

By , January 30, 2014 6:23 PM

Can you restore the .pst? It needs unloading from outlook before just deleting it.

If not:

You can solve the errors rather easily – just remove the data links in ‘Control Panel’/’Mail’/[Data Files]. Don’t do this yet.

See if you have options to remove the calendars there (probably not – now would be a good time to backup/export the working PST+calendar) and do so.

If you can still expand the contents of the deleted .pst in the Navigation pane then goto the folder view and right click and delete the offending calendar. More than likely you won’t have this option so just remove the data files from the Account window (as mentioned above).

If the calendars are still showing, do you have the option of unselecting them from the Calendar window?

Thomas Challenger Thomas Challenger