Connect Weather Meters SEN-08942 to Arduino

Development Boards Arduino
1

Hi,

i´ve got the Weather Meters SEN-08942 and i miss a connection instruction. So is some one able to help me? Or has some one an Fritzing graphic for me?

thank´s a lot

Gurke

2

From the (poor) datasheet and this guys website, the following is my best guess. I’ve arbitrarily assigned the Arduino pin numbers, feel free to change them. Also since pins 2 and 3 are (supposedly) tied together in the

Weather Station, you can use either J1 and/or J2 (for those pins) to wire to the Arduino, which ever is easiest to do.

http://supertechman.blogspot.com/search … %20station

(click on to open)

Declare both digital pins as inputs and enable their internal pull-up resistors. Look for a LOW on the (appropriate) pin when the rain or anemometer switch closes. Add an external 10K pull-up (to 5V) to the weather vane pin1 and read the voltage. Look up the direction from the table in the datasheet.

3

Hi Thanks, a lot. When i understand your grafics right, i have not to connect the anemometer with the wind vane. But fotos on the homepage (your link) the wind vane is connected with the anemometer.

thanks for helping me

4

Gurke:
But fotos on the homepage (your link) the wind vane is connected with the anemometer

Yes, it's not at all clear as to what the proper connections are. The good thing is that with a DMM and perhaps 30 minutes you could figure it all out. Even if you just wire it up as shown, I don't see how anything get's hurt should there be a mistake. If you do figure it all out, be sure to post what the real wiring is so the next guy will know.
5

If the rain and anemometer input pins are internally pulled up, then the other connection should be to ground, so that the input is driven from high to low as the switches closes.