It should be printing fine with the Serial.print(val), but to have the full line received from RFID, you need to accumulate ALL characters in a seperate buffer, not just send the last one with client.println()
It should be printing fine with the Serial.print(val), but to have the full line received from RFID, you need to accumulate ALL characters in a seperate buffer, not just send the last one with client.println()