remy

Most recent activity

• [resolved] Persist an app?

  in Bangle.js • 2 years, 8 months

  

  thank you 👍

• [resolved] Persist an app?

  @remy started

  • 3 comments
  • 1,442 views

  @remy replied
• [resolved] Persist an app?

  in Bangle.js • 2 years, 8 months

  

  I feel like I'm missing something obvious - but I've tried to hunt around first.

  How do I persist an app/code I've written myself to the bangle?

  When I upload from the IDE, returning to the menu on the watch loses the state that's been updated and I lose my software.

  Whereas apps I've uploaded via the banglejs.com/app "store" do persist. I gather I'm missing something (obvious?).

  Thanks in advance.

  – Remy

• Trouble with: setAdvertising heart_rate

  @remy started

  • 24 comments
  • 6,347 views

  @renebohne replied
• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  Yeah, putting the setAdvertising in the update did seem to do the trick.

  Still a bit weird that the name isn't set, though I can see it on the nRF Connect app if I explicitly read the value, but my browser (via webBT) is still reading the old "Pluck 1234" value. Not a biggie though.

  Now seeing if I can add some more services to this poor little puck!

• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  One really weird thing I do see, is if I redeploy the code, the service no longer advertises correctly (it's like it completely resets).

  I'm having to do a hard reset on the puck to get back to advertising.

• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  Quick update, I've got the heart_rate service advertising and "working". Note that I lifted the setAdvertising values from here and just copied the GAPSETADVDATA value into a hex array, but I really don't understand why it works.

  var hr = 65;
  
  function update() {
    hr++;
    if (hr > 120) {
      hr = 65;
    }
    
    NRF.updateServices({
      0x180D: { // heart_rate
        0x2A37: { // heart_rate_measurement
          notify: true,
          value : [0x06, hr],
        }
      }
    });
    
    setTimeout(update, 1000);
  }
  
  NRF.setServices({
    0x180D: { // heart_rate
      0x2A37: { // heart_rate_measurement
        notify: true,
        value : [0x06, hr],
      },
      0x2A38: {
        readable: true,
        value: [0x02]
      }
    }
  });
  
  
  NRF.setAdvertising([
    0x02,
    0x01,
    0x06,
    0x05,
    0x02,
    0x0d,
    0x18,
    0x0a,
    0x18
  ], {
    name: "puck heart", // this doesn't stick at all, no idea why
    showName: true,
    discoverable: true,
    interval: 600
  });
  
  // if I update too early, it seems like GATT is still trying to do the previous updates
  setTimeout(update, 2000);
  

• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  • 0x06 in the heart_rate_measurement is the flags and says that it's got contact.
    
  • 0x40 is the heart rate
    
  • 0x02 is the sensor location value
    
• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  Quick update, I'm able to read heart rate of 40bpm (with contact detected) and body sensor location: wrist on nRF.

  But it's not advertising (yet).

  Here's the code (because I'm not tracking changes!):

  NRF.setServices({
    0x180D: { // heart_rate
      0x2A37: { // heart_rate_measurement
        notify: true,
        readable: true,
        broadcast: true,
        value : [0x06, 0x40],
      },
      0x2A38: {
        readable: true,
        value: [0x02]
      }
    }
  });
  

• Trouble with: setAdvertising heart_rate

  in Puck.js, Pixl.js and MDBT42 • 5 years, 8 months

  

  Looking at this:

  AT+GATTADDCHAR=UUID=0x2A37, PROPERTIES=0x10, MIN_LEN=2, MAX_LEN=3, VALUE=00-40
  

  I'm not 100% sure how to represent the value 00-40 in a way that the puck will understand. Would I give it hex? Is this something else?

  I'm guessing that properties is one of the flags like readable, notify, etc - but not sure which. Is this the same as [0x00, 0x40]? Any ideas?