The Process of switching from Standard to OSDP Communication is done with a USB type A to Type B connection and the UHFTool.
The firmware of the uPASS Reach (UHF processor) can be updated using UHFTOOL.
The latest version can be downloaded here
An additional driver may need to be downloaded at the location below. http://www.ftdichip.com/Drivers/CDM/CDM21224_Setup.zip
Once connected to the UHFTOOL, select Update Firmware option 1 or 2 to update firmware to OSDP. You will then connect with Baud rate 9600 and protocol as OSDP and click “OK”
Wiring
RS485 multi-drop communication
Termination resistors (120 Ω) are recommended to prevent unwanted signal reflections on long RS485 communication
lines. The resistors should be installed at both ends of the communication line.
The uPASS Access reader models before 2020 (Rev. A/B) have a fixed termination resistor. This means you don’t need to install a separate termination resistor. See Figure 5.
RS485 multi-drop communication
Multi-drop communication requires an addressable communication protocol, such as OSDP.
Termination resistors (120 Ω) are recommended to prevent unwanted signal reflections on long RS485 communication lines. The resistors should be installed at both ends of the communication line. See Figure 6 below.
UHF Tags OSDP Output
The Serial output is different in that Wiegand is reliant on Parity Bits and the Serial output is not. The Hex String is sent in a “96 bit Packet” in Serial Protocol and this includes the configured leading and trailing parity bits. Below is the example of how the information is sent through.
When you update to the OSDP firmware you can connect and view what the reader is seeing and sending. Above highlighted is the tag in the UHFTool and below is the raw hex format in the OSDPTool.
If the packet of information is sent “as is” in raw hex string, it will not output the UID printed on the tag. There is an additional bit at the end of the hex string. This is the bit for parity in Wiegand. You will need to set up your panel with an offset of 1 bit. You will need to set up the panel to know where to look for the ID printed on the UHF Tag (FC 72-79 and TID located in bit 80-95).
Sample read in Raw hex format and Card ID information location.
0010000101010110001001001101 HEX String sent to the OSDP panel: 215624D
000010101011000100100110 FC: 10 ID#:45350