M5Stack Community
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Register
    • Login

    M5 Stickc Arduino samples - Temperature reading issue

    M5 Stick/StickC
    6
    8
    10.5k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • M
      m5stickuser
      last edited by

      Hi,

      At room temperature when I run the samples(Factory Test ) for the M5Stickc, the temperature is being displayed as 57/58+ etc., This is certainly incorrect.

      anyone facing similar issue.?

      ajb2k3A 1 Reply Last reply Reply Quote 0
      • ajb2k3A
        ajb2k3 @m5stickuser
        last edited by

        @m5stickuser said in M5 Stickc Arduino samples - Temperature reading issue:

        Hi,

        At room temperature when I run the samples(Factory Test ) for the M5Stickc, the temperature is being displayed as 57/58+ etc., This is certainly incorrect.

        anyone facing similar issue.?

        @m5stickuser said in M5 Stickc Arduino samples - Temperature reading issue:

        Hi,

        At room temperature when I run the samples(Factory Test ) for the M5Stickc, the temperature is being displayed as 57/58+ etc., This is certainly incorrect.

        anyone facing similar issue.?

        Yes.
        we are not sure where the issue is but it could be heat generated by the stick causing the inaccuracies.

        UIFlow, so easy an adult can learn it!
        If I don't know it, be patient!
        I've ether not learned it or am too drunk to remember it!
        Author of the WIP UIFlow Handbook!
        M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

        1 Reply Last reply Reply Quote 0
        • m5stackM
          m5stack
          last edited by

          Hi , what sensor are you used? ENV Unit? ENV HAT?

          1 Reply Last reply Reply Quote 0
          • hagueH
            hague
            last edited by

            I can confirm that it is related to the radiation from the M5StickC. When I connect the ENV-HAT with cables away from the stick, the sensor measures reasonable values.

            Incorrect values if the ENV-HAT is directly connected:
            Wrong values

            Correct values if the ENV-HAT is connected via a cable extension:
            Correct values

            Correct values

            1 Reply Last reply Reply Quote 1
            • ajb2k3A
              ajb2k3
              last edited by

              Nice work proving the issue.

              UIFlow, so easy an adult can learn it!
              If I don't know it, be patient!
              I've ether not learned it or am too drunk to remember it!
              Author of the WIP UIFlow Handbook!
              M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

              1 Reply Last reply Reply Quote 0
              • R
                robalstona
                last edited by

                If the sensor is connected directly to the connector, the heat "passes" over the connector and additionally heats the sensor. The stick during normal operation heats up quite strongly which can be felt with a bare hand. The second thing is that the DHT11 / 12 sensors still increase the temperature reading by 2/3 degrees at least compared to the ds18b20 sensor.

                1 Reply Last reply Reply Quote 0
                • A
                  armbas
                  last edited by

                  Hi all,
                  @robalstona have you found a fix ? also i have the same problem and i would like to know if i need to use ENV Hat / ENV Unit / DHT22 Grove to have a good measurement

                  1 Reply Last reply Reply Quote 0
                  • R
                    robalstona
                    last edited by

                    It will be best if the sensor is connected 5-10cm away from the device. The sensor connected directly to the connector will be heated by the device through paths and goldpins and you can not help it.

                    As far as dht11 / 12 is concerned, I already subtract these 2-3 degrees in the program from the read temperature, which are overstated. But you have to check it yourself experimentally if the result is overstated with any other sensor in the temperature range you want to measure.

                    Unfortunately, I don't have dht22, so I won't tell you anything specific about its accuracy or results.

                    1 Reply Last reply Reply Quote 0
                    • First post
                      Last post