[vc_row][vc_column][vc_tour][vc_tab title=”1. Command-Frame” tab_id=”1393828614-1-5″][vc_column_text]A command frame starts with a report ID. The report ID is also called
command byte in this documentation. The second byte is the length of the
frame (the ID and the length bytes are also included in the calculation of the
length).

Command frame[/vc_column_text][/vc_tab][vc_tab title=”2. Error Byte ” tab_id=”1393828614-2-54″][vc_column_text]Some replies from the UHF reader module to the host include an error byte:

Error Byte
If the tag does not respond, the cause might be that the tag is no longer in the
field or there is a communication error. For more information please refer to the
EPC specification [EPC 2005] or Annex A below.

Annex A Error Codes[/vc_column_text][/vc_tab][vc_tab title=”3. Memory Bank” tab_id=”1393888137896-2-1″][vc_column_text]Some commands contain the tag’s memory bank:

Memory Bank[/vc_column_text][/vc_tab][vc_tab title=”4. Reports(Commands) ” tab_id=”1393888139306-3-4″][vc_column_text]Only the following reports are implemented. There are enough other values for
additional new reports (value 0 is reserved and the maximum value is 0xFF).
OUT stands for a report from the host to the module and IN means a report
from the module to the host.

Report List
It is advised to send the reports always with the maximal report length of 64
bytes. Most reports are already defined in the descriptor with the maximal
length. The others may change in future. Windows truncates longer reports
and discards shorter reports![/vc_column_text][/vc_tab][vc_tab title=”5. Reader-Oriented Commands” tab_id=”1393900041977-4-9″][vc_column_text]This command does not start a communication with the tags. They are only
used to configure the UHF RFID Reader and/or get information.

The  download file will introduce in detail.

[/vc_column_text][/vc_tab][vc_tab title=”6. Transponder Oriented Commands ” tab_id=”1393900043366-5-5″][vc_column_text]Transponder oriented commands are commands which force the module to
communicate with the tags. Therefore the antenna power output must be
enabled and there must be at least one tag in the field.

The  download file will introduce in detail.

[/vc_column_text][/vc_tab][vc_tab title=”Download the source file” tab_id=”1393900229041-6-8″][vc_column_text]Download the whole file from: UHF_RFID_reader_UART_Protocol[/vc_column_text][/vc_tab][/vc_tour][vc_column_text]For the USB version:

After connecting the USB version reader to the computer, PC will automatically
install it as a HID (Human Interface Device). No additional USB driver is
needed.

For both TTL and USB:[/vc_column_text][/vc_column][/vc_row]