When I power up the RFID reader nano (900MHZ) and use RFID tags to check if they are being read, it works. But when I connect the antenna (SparkFun UHF RFID Antenna), it doesn’t detect the tags. I checked the documentation, but I don’t see any code changes needed to connect the external antenna. Please anybody point me in the right direction to debug this issue. All devices are very new and I don’t see any flaws with them.
Have you changed the jumpers required to select the external antenna?