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Simple wall-mounted weather station

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    About Author
    User removed account
    Level 1  
    User removed account wrote 0 posts with rating 0, helped 0 times. Been with us since 1978 year.
  • #2
    pier
    Level 23  
    Hi
    With pressure measurement you are fine. The sensor simply measures absolute pressure and the pressure above sea level is commonly used.
    Check with this calculator if it is correct.
    If you want, I can send you a piece of code that calculates it taking into account the temperature.
    I would get rid of the DHT11 right away, it's a toy piece of plastic that shows random values, especially when it comes to humidity.
    Plus for a well-chosen housing, the whole thing looks nice.
  • #3
    Tomekob
    Level 15  
    "pier", but you made me happy with this calculator, I needed it and I didn't know it was and where. THANKS!
  • #4
    ArturAVS
    Moderator HP/Truck/Electric
    Minimalistic workmanship and good functionality, a big plus from me. Very good selection of electronics housing.
  • #5
    efi222
    Level 12  
    As my colleague @pier noticed, the DHT11 is a toy, although you can find a good one. As for the BMP180, they have factory spreads of up to 3 hPa. And here only a software correction can help.
    Make the station neat and aesthetic.
  • #6
    Slawek K.
    Level 35  
    Such a small note, the station does not measure the temperature in the room (room), but the temperature of the electronics inside the housing. The sensor should be placed outside, at the bottom of the housing - so that it does not heat up from the electronic system.

    Besides, a very nice housing ;)
  • #7
    User removed account
    Level 1  
  • #8
    Slawek K.
    Level 35  
    You write about the DS18B20, which I see on the board, and the DHT and BME sensors are on the outside of the board, but still inside the housing. I don't know which sensor you are taking the temperature measurement from, but both are inside a closed housing. So, as I wrote above, you measure the temperature of the electronics that heats the air inside the case, not the room temperature. The temperature sensor should be outside the housing, from the bottom.
  • #9
    User removed account
    Level 1  
  • #10
    pier
    Level 23  
    Oh, the BMP180 will not measure the pressure correctly, how will it be in the housing?
    As for DHT11 I already wrote, it does not measure moisture.
  • #11
    User removed account
    Level 1  
  • #12
    pier
    Level 23  
    It's cool, I forgot about the temperature measured by BMP, but I won't let DHT go away, it's crap.
    And how do you tend to calculate the NPM pressure as I wrote?
  • #13
    Slawek K.
    Level 35  
    PablitoX wrote:
    Believe me they are not :) The device is wall mounted, but this "wall" is a plate with a hole underneath (old wardrobe), so the sensors are on wires outside the casing (and also outside the wardrobe). The device is wall mounted, but it is better if it is not a solid wall, but some plasterboard, or a partition wall with the possibility of releasing dallas and Bosch somewhere where they will not stick around. Only DHT11 remained "on the plate", but he only measures the humidity (which, due to the hole and inaccurate adherence to the plate, does not distort the result at all).

    In an earlier post you wrote that I should look at the photo, the photos show where the sensors are, so I wrote my comments on this basis. If you wrote in the description that the sensors are on the wires, this would not be this discussion ;)
    In conclusion, I would definitely prefer to measure both temperatures with 2 DS than BMP.