How to read and write RFID tags?
RFID RFID is the abbreviation of Radio Frequency Identification, that is, radio frequency identification. Often referred to as inductive electronic chips or proximity cards, proximity cards, contactless cards, electronic tags.
Radio frequency identification technology uses radio frequency signals for data transmission to achieve wireless identification of almost all objects. This technology also lays the foundation for the development and growth of the Internet of Things.
RFID technology allows you to identify and track each individual object or multiple objects at the same time, even if there is no direct connection within the line of sight.
The following are the technical characteristics of some RFID electronic tags:
1. No direct connection is required for the identification and reading of RFID electronic tags.
2. RFID electronic tags can be repeatedly read, written and reused.
3. RFID electronic tags are very durable and adapt to various harsh environments.
4. RFID reader can read hundreds of electronic tags in one second.
5. The data in the RFID electronic tag is encrypted and can be locked, and the security performance is very high.
6. RFID electronic tags can store more data relative to bar code tags or barcodes.
7, RFID tags can be printed with information, such as instructions, barcodes or personal information such as company name.
8. The RFID system can be embedded into the company's original system or other internal systems as a subsystem.
Most RFID systems are made up of the same components. Basically can be divided into: readers, antennas, electronic tags, sometimes there are some other items and accessories.
Even simpler, if you want to be as compact, convenient, and easy to put as today's devices. All you need is multiple electronic tags and a handheld reader.
Basic read and write operations:
Reading and writing RFID electronic tags often requires professional equipment.
Our mobile phone is also available, just need to download an APP-"NFC info"
Read electronic tag
When the electronic tag is close to the phone, it can be read.
TYPE A (ISO / IEC 14443 TYPE A)
Is the current electronic label agreement, in fact, this agreement also specifies the frequency of electronic labels.
PS: ISO 14443 TYPE A has been determined. The electronic tag is a high-frequency electronic tag, 13.56MHZ.
The sharp-eyed classmate may have found the English word "SMART CARD".
Yes, this time I read a smart card. It is worth noting that many smart cards, such as bus cards, card, access control cards, campus cards, are all ISO 14443 TYPE A protocol. They are technically versatile.
Electronic label details
Here are the details inside this electronic tag.
If professional readers cooperate with specific software, they will be able to operate more, and the information now is more organized and easier to understand.
So what can be achieved is:
Find the EPC number of the RFID tag, which is the electronic product code.
If the read electronic product code is 00000000000000000000010, then we can change it to: 00000000000000000000011.
Software implementation can even give electronic tags, create names and store other information.
It is worth noting that, when entering information to an electronic tag, do not place other electronic tags next to it, so as not to interfere with the normal operation of the entry.
to sum up:
The Internet of Things is an external trend. The role of electronic tags is to give each object that can be touched a "core". With this "core", this object has other meanings to the outside world. Let others know its past and present, and its past and future.
The Internet of Things and electronic tags are not so mysterious. If you have a mobile phone that has NFC function, you can also try it and feel the charm of the Internet of Things.