×

INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Building the induino MeteoStation with 3d printed housing

  • Posts: 62
  • Thank you received: 12
I decided the same way :) 3D printer purchased and on the go.

"I am sorry for my English" :(

One question:

What causes drops of moisture on IR sensors?

I found this Czech project and have an IR sensor covered with HDPE dome.
Has heating to eliminate moisture.
www.mlab.cz/Designs/MRAKOMER4/DOC/mrakomer41_en.pdf

Thanks :cheer:
6 years 5 months ago #20122

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
Hey Magnus,

I've downloaded the latest code from github, re-installed the all thing from the Arduino to the html code.
It's working correctly, however the pressure isn't showing as your latest graph. Kind of stuck at 1000 on the web page while the indi show 1022.

fixed, changed:
Last edit: 6 years 4 months ago by Gonzothegreat.
6 years 4 months ago #21043

Please Log in or Create an account to join the conversation.

  • Posts: 271
  • Thank you received: 72
@gonzo Good thing you fixed it. I have not really changed anything on the webapp. Only the config and start, stop script. My pressure sensor is also a little off (mine is to high). I'll try your approach to calibrate it :)

@kalda. If you worry about moisture on the IR sensor, it looks like you could just glue on that dome. However I have not notized any difference from the sensor with or without raindrops on it.
Proud owner of Observatory 17b - A remote Linux observatory.
Website: Observatory 17b
Build thread @ SGL: Starting summers observatory project
6 years 4 months ago #21046

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
One tip to everyone: do NOT get the DHT wet.... they tend to die when wet... :whistle:
6 years 4 months ago #21049

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
I'm a little concerned with the DHT sensor, somehow it doesn't look like it's reporting the right humidity %.
ie: today, it's been raining most of the day, the weather box is outside, the sensor is protected against direct contact with the rain but not restricted.
Only measured %53 humidity.
6 years 4 months ago #21097

Please Log in or Create an account to join the conversation.

  • Posts: 271
  • Thank you received: 72
Not sure if it's a little too sensitive.
Mine shows 100% when it's raining. However if the sensor is wet, then it will have to dry off for a few days.

Im not sure if there is a better more tolerating sensor out there.

I will see if i can print some slits to cower the openings with. To avoid the sensor getting wet.
Proud owner of Observatory 17b - A remote Linux observatory.
Website: Observatory 17b
Build thread @ SGL: Starting summers observatory project
6 years 4 months ago #21103

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
I'm going to wipe the arduino and test the following code:
playground.arduino.cc/Main/DHTLib
6 years 4 months ago #21104

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
Here's my test
The meteo box is in a container with water, not too much so it's not touching the sensor, it's closed (let's say, almost sealed).
I uploaded a test sketch to check the DHT22.





It's been a good 5 min or so, it reached 70%. Not sure if this is right or wrong.
6 years 4 months ago #21107
Attachments:

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
I'm currently doing a second test, this time it's with my spare DHT22, plugged it on it's own, in the same water container.
As you can only poll this sensor every 2s, I have to say that it's slow to read the humidity, very slow...

I did get it wet by accident, and that went to 99% very quickly.. lol, a good use of the hair dryer and that fixed it.


Edit:
when I say slow, I really do mean slow...each line is 2 seconds. I started from 20% ...
Last edit: 6 years 4 months ago by Gonzothegreat.
6 years 4 months ago #21109

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223
The doc for the DHT22 mentions that the reads should be every 2 seconds at a minimum, and from looking online I also see this:
"The DHT22 only allows readings once every two seconds to prevent self-heating in the chip, since that would skew the humidity readings."

Where in the code, do we have the timeout set to read the DHT please, cannot find it?
6 years 4 months ago #21111

Please Log in or Create an account to join the conversation.

  • Posts: 271
  • Thank you received: 72
Not sure what sketch you are using, but it will have a event loop.

If you look for where the text is printed, it might have a sleep(2) or 2000 just as the last function.
Proud owner of Observatory 17b - A remote Linux observatory.
Website: Observatory 17b
Build thread @ SGL: Starting summers observatory project
6 years 4 months ago #21114

Please Log in or Create an account to join the conversation.

  • Posts: 2247
  • Thank you received: 223

Thanks, I'm using the latest one available in github.
6 years 4 months ago #21115

Please Log in or Create an account to join the conversation.

Time to create page: 0.338 seconds