I bought a TTN gateway about a month ago, and have tested it with a few nodes. One is an Adafruit Feather Lora M0 and the other is a TTGO T-beam. I had the tx power set to 20 dBm in both cases. The gateway is in my attic, near a window and about 9m off the ground. I can’t get more than 0.5km range with this setup. Would you expect a greater range or is this typical? Before I spend money and time to install an outdoor antenna, I want to know that there isn’t a problem with the gateway.