After reading that it was possible to receive the signals sent by the wireless sensor for an Oregon Scientific weather station, I thought it was worth building a project to try this.
This picture is the result.
On the top you can see a 433MHz receiver "shield" that sits on top of an EtherTen Arduino clone. The actual receiver is the small green board on the right.
The software listens to transmissions from the weather station's outdoor sensor (for temperature and humidity) and periodically sends this data to Weather Underground.
Of course the normal Oregon Scientific indoor display continues to work.
The software ended up being the tricky part of this project. There is code available to both decode the transmissions, and upload them to WU. The tricky part was that I wanted to make a nice OO library out of the RF decoding code that you could easily use in other Arduino projects. The library is still a work-in-progress, but it is working well enough that we have been reliably sending data for the past week. I will write about the library again when it is ready to release.
For the current weather in Ashfield see my PWS page.
