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  • May 28, 2021 at 2:16 pm in reply to: A3: CO2 not adjusting for temp ? #28888
    Wolferl
    Moderator

    Hi Quincy,

    CO2 concentration /is/ dependent on air temperature, have a look at this paper.
    Also, the CO2 sensors used (Winsen MH-Z19) are not very accurate, the datasheet states +/- 50ppm + 5% of reading.
    The datasheet also states that the reading is “temperature compensated”…one never knows how good that works inside a device that generates additional heat.
    It is a cheap sensor after all and one cannot expect laboratory-grade precision from them.
    Additionally, that sensor performs some magic self calibration (that could explain the sudden drop to 450 ppm) and can also be calibrated by the MCU.

    HTH & Cheers,
    Wolferl

    May 27, 2021 at 2:35 pm in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28886
    Wolferl
    Moderator

    Hi,

    Great, thanks for the feedback!
    Would you mind posting the project’s code somewhere (github or whatever you prefer), so other people (including me) can replicate what you achieved?

    Cheers,
    Wolferl

    May 27, 2021 at 8:35 am in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28884
    Wolferl
    Moderator

    Hi,

    You’re welcome, great you got it to work!
    There is no atmospheric pressure reading on your new sensor, is that intended?

    Cheers,
    Wolferl

    May 24, 2021 at 9:06 am in reply to: SI-22G Tube dead time? #28874
    Wolferl
    Moderator

    Hi,

    I did not find that info on the SI22G either.
    But I found this document which explains on page 6 how to calculate the dead time by doing some easy measurements.

    HTH,
    Wolferl

    May 23, 2021 at 6:19 pm in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28871
    Wolferl
    Moderator

    Hi,

    I made a recording with Wireshark of my unit #13000070. I hope it helps you finding out what happens.

    Cheers,
    Wolferl

    Attachments:

    1. Wireshark-Request-Unit-13000070.png

    2. Wireshark-Response-Unit-13000070.png

    May 21, 2021 at 6:46 am in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28865
    Wolferl
    Moderator

    Hi

    I think you’ll need to delete the “0x” in front of the device ID.
    The number itself needs to be in hexadecimal though.

    Cheers,
    Wolferl

    May 20, 2021 at 10:20 am in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28862
    Wolferl
    Moderator

    Hi,

    Install Wireshark on a computer on the same network as your devices and see for yourself how your requests look like.

    Cheers,
    Wolferl

    May 19, 2021 at 1:19 pm in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28857
    Wolferl
    Moderator

    Hi,

    I am by no means a JSON guy, but should that code:

      String ptr = "GET /data.uradmonitor.com/api/v1/upload/exp/01/";
        ptr += "X-User-id:%s\r\nX-User-hash:%s\r\nX-Device-id:%08lX\r\n";
        ptr += USER_ID;
        ptr += USER_KEY;
        ptr += "0";

    more read like this?

      String ptr = "GET /data.uradmonitor.com/api/v1/upload/exp/01/\r\n";
        ptr += "X-User-id:" USER_ID "\r\nX-User-Hash:" USER_KEY "\r\nX-Device-id:" DEVICE_ID "\r\n";

    See the CRLF at the GET address end, plus the values inserted at the correct places.
    Also you’ll probably need to supply a correct device id, 0 will not do. You’ll need something like 0x1300xxxx for a KIT1 compatible device.

    HTH,
    Wolferl

    May 15, 2021 at 9:17 am in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28845
    Wolferl
    Moderator

    Hi,

    It looks like you do not include the authentification bits when trying to upload the values.
    Have a look here:
    PDF Documentatioh for API call

    Cheers,
    Wolferl

    May 6, 2021 at 6:56 am in reply to: How to upload to uRadmonitor from (Arduino) ESP32? #28838
    Wolferl
    Moderator

    Hi Don,

    Can you be a bit more specific what you are trying to achieve and what exactly the problem is?
    What device ID are you using?

    Cheers,
    Wolferl

    April 22, 2021 at 1:59 pm in reply to: Smoggie Pressure sensor #28834
    Wolferl
    Moderator

    Hi James,

    I think it’s best to contact Radu directly (username “Radu”) about this.
    Have you checked what your Smoggie’s webpage says?

    Cheers,
    Wolferl

    April 18, 2021 at 7:54 am in reply to: Hot charger + Device offline while connected to WIfi #28822
    Wolferl
    Moderator

    You’re welcome, great you got your Smoggie to work!

    Cheers,
    Wolferl

    April 15, 2021 at 4:52 pm in reply to: Hot charger + Device offline while connected to WIfi #28806
    Wolferl
    Moderator

    Your unit seems to get no IP and DNS addresses (“IP unset”), that’s why it cannot contact the uradmonitor server.
    You seem to have correctly setup the access to your Wifi (it says “Wifi:connected”). Does you Wifi router have DHCP activated (it usually is)?
    It could also be a routing or firewall issue, though.

    HTH,
    Wolferl

    April 12, 2021 at 9:42 am in reply to: Faulty Model 3A wifi #28786
    Wolferl
    Moderator

    Hi Adam,

    Since it has happended before: be sure to check the wall wart, they like to fail. These are standard 5V PSU models, just try your A3 with a standard USB PSU for phones or tablets you may have lying around.
    The modules themselves are pretty reliable.

    Cheers,
    Wolferl

    December 31, 2020 at 8:55 am in reply to: VOC sensor? #28632
    Wolferl
    Moderator

    Hi Ken,

    I think the problem with this are some short, very high readings which blow up the vertical scale of the diagram too much.
    Zoom in a time range without large peaks and you’ll see nice, plausible looking values.
    It would be better to use logarithmic scaling for VOC and PM… @Radu?

    Cheers,
    Wolferl

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