So the weather station has been up and running for a while now but something has been bothering me. About twice per hour I get a “lost sensor contact” message from the software. Occasionally, it looses contact for a few hours at a time before it comes back.
I think it is because the sensors are around 50′ away through 3 brick walls and the fact that the receiver is located in my shack which can be a noisy RF environment at times.
The solution? A external antenna hack…
The unit in question, a WH-1081 weather station.
An SMA fly lead. I will cut the plug end off.
The back removed.
Original antenna and receiver board.
Hole for SMA socket
SMA socket installed and connected to the receiver board. I connected the ground of the coax to the battery ground.
All put back together.
The finished result.
I put a spare 60cm long 434Mhz antenna on the top to test and so far, after 3 hours, it has not lost sensor contact once.