Antenna mod for my WMR-200 weather station.

I was having a lot of problems with the default mounted antenna of my Oregon Scientific WMR-200
Weatherstation. This resulted in not receiving the temperature sensor. The distance between my temperature sensor and the receiver is aprox. 20 meters (line of sight) but this was enough to allow interference stop receiving the signal for a long time (usually all night)

You can see that in some historical records

2015-07-05 00_00_09-Stadspolders Dordrecht, NL Weekly weather summary








2015-07-05 00_01_07-Stadspolders Dordrecht, NL Current Weather Conditions


This resulted in a lot of N/A readings.

Today I have removed the original antenna from my WMR-200 and I have mounted a new antenna with a better gain. Since the signal is tranmitted over 433.92 Mhz I ordered an antenna that is suitable for this job.





So, i will tell you what materials I used for this little modification.

1 x High gain antenna (suitable for 433.92 Mhz) (Diamond RH9541S)

1 x SMA Male to SMA Female RG316 Cable

1 x Solderering Iron

1 x Little piece of wire

A little bit of Teflon tape (or other tape)

Continue reading Antenna mod for my WMR-200 weather station.

DVB-T Fun with a Raspberry PI – Weatherstations (Part 3)

Welcome back to part 3 already with DVB-T Fun with a Raspberry PI. In this part I will show you how you can profit from receiving all the data of your neighbors fancy wireless weather station data and use it for your own benefits.


Weatherstations with wireless sensors are very common and cheap now-a-days. Prices vary from 80 euro to a few hundred euros. What most of them have in common is the use of the LPD433 (Low Power Device 433 MHz) or unlicensed ISM band/SRD bandfrequency to transmit the data on air. (Among with wireless doorbells, cheap wireless alarms, car key-locks e.t.c…)
The maximum transmission power for these devices is 10mW max. This will cause you will be receiving only weather stations that are in your direct vicinity (depending on your antenna set-up of course)

Continue reading DVB-T Fun with a Raspberry PI – Weatherstations (Part 3)