Extend data storage

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  • After reading the tutorial and some posts, I knew that bangle can collect data offline and transfer it to PC later.
    However, the storage space is not large enough if I want to store several hours' data.
    And seems that bangle.js doesn't support SD card?
    So is there any solution to extend my data storage?
    Thanks in advance.

  • Hi,

    No, I'm afraid there isn't. Bangle.js 2 has 8MB of flash, and you can use compression on the data you write to make that go a bit further.

    However short of unsoldering the flash chip and putting on a bigger one, which is quite a big undertaking, there's no way to extend that.

    What data were you wanting to log, and how often?

  • Thank you Gordon.
    I basically want to log IMU with 3 axis, maybe sample rate 10-20.
    So I guess I have to store in 4MB flash and transmit to PC when it is full.

  • Ok, it seems like if you store the data as Uint16 (which is all you get off the accelerometer) it's 6 bytes per sample and at 20Hz that's 432kB per hour. So on Bangle.js 2 you're still looking at 20-ish hours.

  • Seems the duration is not bad. I will try it later, thanks Gordon.

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Extend data storage

Posted by Avatar for user136432 @user136432

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