(2017-10-21, 09:03 AM)toqduj Wrote:(2017-10-20, 12:03 PM)shark24 Wrote: Thx for your reply. You are right about the weatherproofing. I guess Ill go for a basic 1wire temp. sensor because my existing waterproof plug still has 3 free wires left and there is no need to measure humidity and airpressure outside so an additional bme280 will do the job inside. The GPS reception inside the cabin is good as well so currently I don't really need any controllers besides the rpi.
Still playing with the microcontrollers for home use so I'm looking forward to read more about your project.
You might want to experiment a bit whether you can do 1-wire over such long connections (all the way to the masthead?):
https://www.maximintegrated.com/en/app-n...mvp/id/148
Like you said, everything you can keep indoors is best kept there. There are only a few sensors you'd want outside, such as wind, humidity, illuminance and perhaps a GPS and IMU sensor on the cabin roof. The humidity indoors can still be significantly different than outside, in particular if you're running a heater or stove, but whether the information is useful to you is not so certain..
I dont need the temp. at the top I wrote mast step which is the very base so there wont be a big distance.
I'm sailing a quite wet boat not using a sprayhood so its hard to find a save place for the humidity sensor outside and the informativeness of the value isnt that important to me.
I'm very much interested in a DIY method to accurately measure windspeed and direction on the boat