Tamás

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• Best way to process accelerometer data (floats, Float32Array)?

  in Bangle.js • 4 years, 2 months

  

  @Gordon Thank you for the explanation.

• Best way to process accelerometer data (floats, Float32Array)?

  @Tamás started

  • 3 comments
  • 1,313 views

  @Tamás replied
• Best way to process accelerometer data (floats, Float32Array)?

  in Bangle.js • 4 years, 2 months

  

  Hi All,

  Is the FPU of the nRF52 utilised when working with 32 bit floats?

  I would like to find the most efficient method to process data from the accelerometer and I'm a bit confused at the moment:

  • Bangle.getAccel() returns floating point values already converted to g. It's not clear though if these should be considered as float or double in terms of C.
    
  • The Acceleration Recorder app converts and stores these in an Int16Array. However, one might think that a Float32Array would be more straightforward and efficient to avoid conversions.
    
  • There's a tutorial here in the subject but I wouldn't mind avoiding inline C for now.
    
    

  I'm new to Espruino/JS and I might be confused by how C types are converted in Espruino. Could someone advise me the best approach?

  Thanks,
  -Tamás

• Acceleration Recorder doesn't work

  in Bangle.js • 4 years, 3 months

  

  Hi, Is it possible that the Acceleration Recorder doesn't work anymore with the latest firmware (v2.07)? It worked before but since the update it gets stuck at "Waiting" after starting a recording.

  EDIT1: Just ignore this, apparently a reboot fixed it.

  EDIT2: Happened again, so probably better not to ignore it. I'm happy to dig deeper into it but I'm new to the platform and don't really know how to start debugging it.

• Acceleration Recorder doesn't work

  @Tamás started

  • 1 comment
  • 860 views

  @Tamás replied
• Building custom firmware

  @Tamás started

  • 3 comments
  • 1,551 views

  @Gordon replied
• Building custom firmware

  in Bangle.js • 4 years, 5 months

  

  Just wondering if the bootloader accepts any custom firmware built with the Nordic tools? Does it have to be signed to be able to flash it onto the Bangle.js?

• nRF52840 for Bangle.js?

  in Espruino Work • 4 years, 5 months

  

  @Gordon Just out of curiosity, how do you reflash 3000 No1 F18 watches? Or do they arrive flashed with your firmware from the manufacturer?