Choose LoRa module freq and antenna for best range

[d00m178]

Hello,

In my project I'm using LoRa module 915Mhz.  There are two devices - remote server, which measure temperature and client device connected to Android phone via FTDI adapter and receive data from server.

I have successfully received data at range 1km.
and last RSSI was about -98 -100 which meant pretty bad connections I suppose.

Now I need put my server device even further - to 3 km.
I need advice - how to improve range. maybe I need use different antenna or maybe I need choose freq - 433Mhz.
Thank you in advance.

[Felix]

You have to first elevate your antennas if you want to improve your range. Then use lower bitrates. Then use more power (up to 20dBm with these modules). Better (directional) antennas are also a good idea for longer range. That said, this is not really a forum specialized in RF but you're always welcome to ask and share.