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    Wake up on pick-up

    M5 Stick/StickC
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    • T
      Tristar
      last edited by

      hey @davesee

      I have the latest version of the M5Stack gray, but the board also reads 2018.3. I am going to try out your code that you used for M5StickC on my M5Stack Gray with PlatformIO.

      I will report back how it went. All I want is a wake up on movement :). The same thing you got running on your M5StickC.

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      • felmueF
        felmue
        last edited by

        @Tristar

        Just curious - how did your try out go? Have you been able to get @davesee code running on your M5Stack Grey?

        Thanks
        Felix

        GPIO translation table M5Stack / M5Core2
        Information about various M5Stack products.
        Code examples

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        • T
          Tristar
          last edited by

          Not yet, but I will invest tomorrow the whole day and try to get his example working on the GREY.
          I have the problem that the GREY just restarts on its own every few seconds. Looks like the GPIO35 is always triggering the wake up call from deep sleep.

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          • felmueF
            felmue
            last edited by felmue

            Hi @Tristar

            How's it going? My two M5Stack Gray and Fire did exactly the same, they would restart on their own. The reason is, as we already expected, that the interrupt output from the MPU6886 is not connected to the GPIO35 (at least not in my two M5Stacks).

            I've fixed that by soldering a wire from MPU6886 pin12 (INT) to GPIO35 and now my M5Stacks properly go to sleep and only wakes up on motion again.

            0_1597849398440_M5StackFire_MPU6886_INT.png

            Cheers
            Felix

            GPIO translation table M5Stack / M5Core2
            Information about various M5Stack products.
            Code examples

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            • felmueF
              felmue
              last edited by

              Hi @davesee

              Thank you very much for your WOM code which I am using on my M5Stack Fire.

              Just curious about the following code lines for WOM step 2:

              • The read regdata are not actually used. Maybe by mistake?
              • Comment says 32 samples, but actually only 16 samples are selected. Typo?
              /*
              Step 2: Set Accelerometer LPF bandwidth to 218.1 Hz
                      • In ACCEL_CONFIG2 register (0x1D) set ACCEL_FCHOICE_B = 0 and A_DLPF_CFG[2:0] = 1 (b001)
              */
              I2C_Read_NBytes(MPU6886_ADDRESS, MPU6886_ACCEL_CONFIG2, 1, &regdata);
              regdata = 0b00100001; // average 32 samples, use 218 Hz DLPF
              I2C_Write_NBytes(MPU6886_ADDRESS, MPU6886_ACCEL_CONFIG2, 1, &regdata);
              

              Thanks
              Felix

              GPIO translation table M5Stack / M5Core2
              Information about various M5Stack products.
              Code examples

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              • T
                Tristar
                last edited by

                @felmue
                yeah, you are right. On the M5Stack Grey there is no wiring between the pins. Could you provide some images of the board where one can see how you did the soldering? time to rip my m5stack grey open and do some soldering too :)

                For the next version of the M5Stack there has definitelyto be a wiring between the IMU (mpu9250) and a pin like 35!!

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                • felmueF
                  felmue
                  last edited by

                  Hi @Tristar

                  The daughter board with MPU6886 and BMM150 are the same for M5Stack Gray and Fire. So the picture I've attached to my previous post (#15) also applies for M5Stack Gray.

                  Good luck!
                  Felix

                  P.S. you'll find the same information also through the link in my signature below.

                  GPIO translation table M5Stack / M5Core2
                  Information about various M5Stack products.
                  Code examples

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                  • felmueF
                    felmue
                    last edited by

                    Hi guys

                    Just a heads up on the new M5Core2 which has the IMU and mic on a micro board attached to the M5bus. As far as I can tell the interrupt pin of the MPU6886 doesn't seem to be connected to GPIO35 or any other pin on the M5bus which is a bit disappointing.

                    Cheers
                    Felix

                    GPIO translation table M5Stack / M5Core2
                    Information about various M5Stack products.
                    Code examples

                    1 Reply Last reply Reply Quote 0
                    • D
                      doublep
                      last edited by

                      Does anyone know what the trigger values of registers ACCEL_WOM_THR represent? For example, for the ADXL345, 1 LSB of trigger register is the equalavent of 0.065 G. However, there is no information about this in the datasheet of the MPU6886 and the value also seem to be effected by setting a different value for A_DLPF_CFG in the ACCEL_CONFIG_2 register.

                      If anyone can help with this that would be nice.

                      ZontexZ 1 Reply Last reply Reply Quote 0
                      • ZontexZ
                        Zontex @doublep
                        last edited by

                        @doublep hello, could you refer me to where you read that value from?

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