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Article

Weather Station

With no moving parts

Weather Station
Weather Station
Many aspects of our daily lives are determined by the weather: whether or not you take an umbrella with you, whether you walk to work or take the car, whether you close the window or leave it open, whether you stay in bed or get up, and so on. Even though a glance out the window can tell you a lot about the weather at the moment, you need data to help you estimate what it will be later – and that’s where the weather station described here comes in handy.
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Materials

Extra info / Update

* Measures temperature, relative humidity and light level
* Measures wind speed and direction without any moving parts
* Calculates the dew point, apparent temperature and cloud base
* Based on a Raspberry Pi Zero W

Discussion (0 comments)

elektor

SR-71 7 years ago

Very interesting paper just a little bit short !

Could you kindly translate the remarks into the code in english ?

Could you provide some shot of internal pipe where the pressure sensor are connected ?

Why has the pipe so many holes ?
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elektor

TheEditor 7 years ago

Kindly note that this article is classifiied as a HOMELAB project (as opposed to an ELEKTOR LABS PROJECT). See also the final paragraph.
I have contacted the author Zeno Otten with a request to assist here.
Reply
elektor

Z. Otten 7 years ago

the holes in the pipe are not functional.
see  http://www.zenot.nl/prod28.htm
for another example of a weatherstation with pressure sensors
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elektor

Z. Otten 7 years ago

if you have questions about the software you can mail me:  z.otten@chello.nl
 
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3 Comment(s)
elektor

D. Murrell 7 years ago

I have tried building this project, but can't get the SDP610 sensors to work, I have changed one sensor to address 21 and both sensors show in i2cdetect -y 1 command as 21 and 40, but when I run the program it fails in module ReadDP at line result1 = (i2c.read ....) with IOError (Errno 5) Input/Ouput Error
I have tried enabling the time delay just before that line but it still won't work, all my other sensors work fine.
Any ideas how I can get this working? 
Reply
elektor

TheEditor 7 years ago

Kindly note that this article is classifiied as a HOMELAB project (as opposed to an ELEKTOR LABS PROJECT). See also the final paragraph.
I have contacted the author Zeno Otten with a request to assist here.
Reply
elektor

Z. Otten 7 years ago

you managed to change the address and i2cdetect works, so the sensors and i2c protocol are functioning.
try some extra waiting time after i2c.write_byte(addr,ePresHoldCmd)  with #time.sleep(0.1) command
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elektor

D. Murrell 7 years ago

I have fixed the problem, you need to used the old i2c kernel driver, the current build uses bmc2835 and does not read the sensors correctly, going back to bmc2708 fixes the problem. To change the driver do the following,
sudo nano /boot/config.txt
add the following line near the bottom of the file
dtoverlay=i2c-bmc2708
save file and then reboot
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