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    Lopy4 deep sleep problem

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    lopy4loradeepsleep
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    • I Offline
      iwahdan @pierremarsot
      last edited by

      Hi @pierremarsot, I cannot totally get from the picture how you setup the circuit , if you could share the circuit diagram along with pin connections I could try to test with your setup.

      Wahdan

      P 1 Reply Last reply Reply Quote 0
      • P Offline
        pierremarsot @iwahdan
        last edited by

        Tanks @iwahdan 0_1532541974275_IMG_1430.JPG
        Can you see clearly on this picture ?

        Basic circuit. Powered by a power supply (12Vdc / 3A) on 3.3V PIN
        I tried on 5V PIN, i got a consumption around 65mA

        I S 2 Replies Last reply Reply Quote 0
        • I Offline
          iwahdan @pierremarsot
          last edited by iwahdan

          @pierremarsot , This is NOT how you power on any of pycom Devices.

          Maximum voltage you can use is 5.5v and you Connect to Vin not 3.3v pin! , the 3.3v pin is actually used for supplying 3.3v output.

          please use this pinout diagram as a guideline

          Wahdan

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          • P Offline
            pierremarsot @iwahdan
            last edited by pierremarsot

            @iwahdan
            Ok, thanks for this issue, sorry ...

            I just tried with an 5.5V power supply (checked with multimeter) and i got a consumption around 63mA in deep sleep.
            Same circuit, just changed power supply input and connected with 5.5v PIN.

            I 1 Reply Last reply Reply Quote 0
            • I Offline
              iwahdan @pierremarsot
              last edited by

              @pierremarsot, well it might very well be that your Lopy was damaged in some way or something got shortened , do you have another device that you can try?

              Wahdan

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              • S Offline
                Sympatron @pierremarsot
                last edited by

                @pierremarsot said in Lopy4 deep sleep problem:

                Basic circuit. Powered by a power supply (12Vdc / 3A) on 3.3V PIN

                What do you mean by that? Did you connect 12V to the 3.3V Pin? This would certainly damage the device...

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                • P Offline
                  pierremarsot @Sympatron
                  last edited by

                  Hi @sympatron
                  Yes, I connected the 12V to the 3.3V and 5V PINs ...
                  I thought my power supply transformed the 12V input in 5V output but after some tests, it didn't ...

                  I used this one : https://www.amazon.fr/SODIAL-Planche-Compatible-puissance-bricolage/dp/B015NUN4QI/ref=asc_df_B015NUN4QI/?tag=googshopfr-21&linkCode=df0&hvadid=106796343001&hvpos=1o3&hvnetw=g&hvrand=2025127917332645665&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9055144&hvtargid=pla-208287294001&psc=1

                  robert-hhR 1 Reply Last reply Reply Quote 0
                  • robert-hhR Offline
                    robert-hh @pierremarsot
                    last edited by

                    @pierremarsot that module should step down 12V to 5V or 3.3V. If your LoPy4 still works, then you probably used it fine. Only the 3.3V pin of the xxPy devies is an Input. Always power them throuh Vin.

                    J 1 Reply Last reply Reply Quote 0
                    • J Offline
                      jcaron @robert-hh
                      last edited by

                      @robert-hh I think you mean the 3.3V pin is an output, and one should never power the board through it?

                      robert-hhR 1 Reply Last reply Reply Quote 0
                      • robert-hhR Offline
                        robert-hh @jcaron
                        last edited by

                        @jcaron Of course!

                        1 Reply Last reply Reply Quote 0

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