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  3. BlueZ - Bluetooth protocol stack for Linux - is same as thermos bottle?

BlueZ - Bluetooth protocol stack for Linux - is same as thermos bottle?

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linuxdata-structureshelpquestion
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  • L Offline
    L Offline
    Lost User
    wrote on last edited by
    #1

    After few "try this and watch for smoke ..." Setting "to" parameter to zero / "0" makes the Bluez function return correct result in unspecified time. Setting the "to" parameter to "lower then best guessed" value in mS - the function will return "-1" - a customary error value. Same as thermos bottle will keep hot contents (coffee?) hot and cold contents (beer ?) cold - BUT how does it know to keep hot hot and cold cold?

    J L J 3 Replies Last reply
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    • L Lost User

      After few "try this and watch for smoke ..." Setting "to" parameter to zero / "0" makes the Bluez function return correct result in unspecified time. Setting the "to" parameter to "lower then best guessed" value in mS - the function will return "-1" - a customary error value. Same as thermos bottle will keep hot contents (coffee?) hot and cold contents (beer ?) cold - BUT how does it know to keep hot hot and cold cold?

      J Offline
      J Offline
      jeron1
      wrote on last edited by
      #2

      You have my vote for Random Post of The Day. :confused:

      "the debugger doesn't tell me anything because this code compiles just fine" - random QA comment "Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst "I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle

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      • L Lost User

        After few "try this and watch for smoke ..." Setting "to" parameter to zero / "0" makes the Bluez function return correct result in unspecified time. Setting the "to" parameter to "lower then best guessed" value in mS - the function will return "-1" - a customary error value. Same as thermos bottle will keep hot contents (coffee?) hot and cold contents (beer ?) cold - BUT how does it know to keep hot hot and cold cold?

        L Offline
        L Offline
        Lost User
        wrote on last edited by
        #3

        It doesn't; it just slows the rate of change to the state of equilibrium with its environment.

        "Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I

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        • L Lost User

          After few "try this and watch for smoke ..." Setting "to" parameter to zero / "0" makes the Bluez function return correct result in unspecified time. Setting the "to" parameter to "lower then best guessed" value in mS - the function will return "-1" - a customary error value. Same as thermos bottle will keep hot contents (coffee?) hot and cold contents (beer ?) cold - BUT how does it know to keep hot hot and cold cold?

          J Offline
          J Offline
          jschell
          wrote on last edited by
          #4

          Well I suppose that anything that intends to make something cold or something hot would need to have some way of measuring the temperature. Otherwise one might expect that self heating coffee mug sitting on the desk to burst into flames.

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          • J jschell

            Well I suppose that anything that intends to make something cold or something hot would need to have some way of measuring the temperature. Otherwise one might expect that self heating coffee mug sitting on the desk to burst into flames.

            L Offline
            L Offline
            Lost User
            wrote on last edited by
            #5

            I have been around the block few times - broke few class thermos bottles too... never found any remnants of temperature measuring devices , not even the "skinny ones".... intended for a...l usage....

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            • L Lost User

              I have been around the block few times - broke few class thermos bottles too... never found any remnants of temperature measuring devices , not even the "skinny ones".... intended for a...l usage....

              J Offline
              J Offline
              jschell
              wrote on last edited by
              #6

              Ah...misread...thought there was a question about a powered device. Non powered devices rely on insulation which works for either cold or hot since it is transference where either changes state.

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