Introduction: SolidDigi UHF RFID Reader (ISO18000-6C EPC G2)

Long Range UHF RFID Reader is an important way to read information and input
information. Automatic identification technology has been developed in recent years.
Now it is a new high technology which includes barcode technology, magnetic strip
(card) technology, RF technology, optical character recognition technology, and
biological recognition, distance Card Reader and etc.
In normal case, UHF RFID tags need less power than the reader which needs to have
high receiving sensitivity. In certain system, the transmit path and receive path are
independent of each other in the reader, especially when the uplink and downlink
have different frequency.
Technically, different applications can choose different transmit power. However,
there are regulations that need to be met. Usually the RF power 100mW~500mW is
suitable for all kinds of RFID distance reader system. In different regions and areas,
the reader has to follow different regulations.
SolidDigi long distance reader has many advantages such as: compatibility with
different protocols, high reading speed multi-tags reading, linearly polarized antenna,
waterproof appearance designing and etc. It can be widely used in RFID systems, and
is very friendly to further development based on it.
Typical applications:
• Logistics and warehouse management: Management of goods flow and storage,
and mail, package, luggage transportation and etc.
• Intelligent parking managementParking management and charge automation.
• Production-line management: Identification of production process points.
• Product anti-counterfeiting detection: the write protection from tag’s internal
memory can be used to detect the products’ authenticity
• Other application: widely used in club management, libraries, student status,
consumption management, swimming pool management and etc.
When the UHF RFID reader is powered on and connected to PC, it can be identified by the PC
software. It means the reader is working normally. When the tag is close to the reader, the PC
software will show signal strength and tag ID. This RFID reader can identify many tag IDs at
the same time.
This UHF RFID reader uses RF energy harvest to read tag data. Keep it far away from metal
when use it. If it closes to the metal, the RF wave will be absorbed by it which can shorten the
distance of card reading. The installation position should be away from the equipment like
motor, transformer and etc, to reduce the effect on the reader.
According to the actual needs, this UHF RFID reader can be with the most suitable directional
antenna with appropriate gain (5.5dBi, 8dBi and etc) to achieve the best performance.
There are two different interfaces: TTL UART and USB.

Step 1:

Communication Process

Step 2:

Detail Explanation of Instructions:
1. Serial communication port (UART) configuration (initialization)

Step 3:

2. PC/MCU and UHF RFID reader initial communication
Hardware version indentify command
Send10 03 01
Receive0x11_AS3991 ROGER Reader Hardware 1.2

Software version indentify command
Send10 03 00
Receive0x11_AS3991 Mini Reader Firmware 1.5.1

Step 4:

3. UHF RFID reader scans RFID tag
Scan label command
Send43 04 01 cd
receive44 16 01 ff 54 3a 0d 0e 30 00 30 34 00 00 00 00 03 c0 00 00 3f 17

Notebold letters are RFID tag’s ID. Different tag has different ID. Therefore, for different tag,
the return values of sending 43 04 01 cd are different.

Step 5:

Change Working Frequency Band
Use the UHF RFID reader demo program to set the working frequency band.
Right click “Advanced Reader Settings” and navigate to “Frequencies”, then find Profile list,
and select EUROPE, which is EUROPE standard. Select AMERICAN to choose AMERICAN
standard, and clock SET to finish frequency setting.