Power Down Mode

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  • October 7, 2016 at 1:31 am #15001
    Kiran Dalvi
    Participant

    Hi,

    we are trying to make dragonfly module to go in deep power down mode. for this we followed the sequence for switching off radio as below,
    Issue the AT#SHDN command.
    2. Wait 30 seconds.
    3. Power off or disconnect power.

    but still the current consumed by module is 6.5mA, is there any way, that we can reduce this current further down to sub 1mA.

    regards,
    Kiran Dalvi

    October 7, 2016 at 8:17 am #15003
    Mike Fiore
    Blocked

    Kiran,

    Here’s an example program that properly turns off the radio and puts the processor into STOP mode.

    https://developer.mbed.org/teams/MultiTech/code/Dragonfly_Low_Power_Example/

    Cheers,

    Mike

    October 9, 2016 at 11:53 am #15010
    Kiran Dalvi
    Participant

    Hello Mike,

    Thanks for reply.
    we have tried this program, and observation is that the board draws 6.5mA current even in sleep mode. one of the email that i had received from Multiconnect service engineers, claimed that the current drawn should be as low as 1-2mA, but we are not getting those results.

    Any pointers will be really helpful.

    thank you,
    Kiran Dalvi

    January 7, 2017 at 7:35 pm #16246
    Anthony Otis
    Participant

    I’m having the same problem. Measuring currents of 4.5-5.5mA in STOP mode, using the low power example code:
    https://developer.mbed.org/teams/MultiTech/code/Dragonfly_Low_Power_Example/

    Where is this current going? The modem is off and the microcontroller is in STOP mode which should draw <100uA. Are there any suggestions to improve this?

    Thanks

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