[werk_ag]

The RF efficiency is somewhat low, the first thing that should be done is try to improve it.
Things you could try:
Try find a better spot for the receiver, sometimes moving it just 30 to 50 cm do a big diferrence.
Try diferrent placements of the antennas in both TX and RX (Horizontal, Vertical). Avoid using antennas with a cable extension on the TX unit, a direct attachment of the antenna to the SMA connector avoids signal looses.

Stop Cumulus, open the Cumulus.ini file and search for this:

Code:

VP2SleepInterval

change the value to 1500.

Don't refresh the webpage served by WeatherDuino to often, every time the page is generated, reception is frozen (arduino isn't a multitask system, and generating the webpage consumes a lot of time)

Let me know if this helped.