Jean-Philippe_Rey

Most recent activity

• Help with a humidity sensor

  in JavaScript • 2 months, 3 weeks

  

  Thanks for the details.
  As a first try you can use the setWatch function. When the given callback is called, the parameters lastTime and time are passed to it. by doing 1/(time-lastTime) you get the frequency value.
  The limitation could be the processing time of the callback, but you can go up to 1kHz easily as far as I remember. Then you can maybe adjust the RC constant of your 555 circuit in order to decrease the maximal output frequency.

• mesh networking?

  in Puck.js, Pixl.js and MDBT42 • 2 months, 3 weeks

  

  OK, thanks for your feedback.
  I didn't realize that a BLE mesh relay had to be always on. I tried to look for the Bluetooth SIG roadmap of the mesh feature but it seems not to be published. I hope they will improve the mesh mechanisms in order to support routing packet in low power mode (bluetooth seems to have good capabilities in term of node synchronization , however..)
  I'll try to use advertising instead. Again, thanks for your feedback.

• Help with a humidity sensor

  in JavaScript • 2 months, 3 weeks

  

  Are you sure that the humidity sensor outputs some values in [Hz] ? This seems very unlikely. Unless you talk about the frequency of sampling? In that case, you won't find easily any humidity sensor able to output new sample at more than a few [Hz]. Humidity is something that does not vary quickly.
  Could you explain in details what you want to do? Could you also share the documentation of your humidity sensor?

• mesh networking?

  in Puck.js, Pixl.js and MDBT42 • 2 months, 3 weeks

  

  Hi!
  This topic seems rather old now, and Bluetooth stack has somehow evolved. BLE mesh is being used more and more. It seems that the mesh is offered by Nordic within the softdevices. Is it planned to support BLE mesh within Espruino (NRF based platforms) in a near future or still no interest in going in that direction?

• [SOLVED] JSON attribute accepts spaces in name but cannot be addressed

  in JavaScript • 4 months, 3 weeks

  

  Correct, it is not a big problem. I didn't know JS was so permissive.
  Thanks for quick reply, @Gordon!

• [SOLVED] JSON attribute accepts spaces in name but cannot be addressed

  @Jean-Philippe_Rey started

  • 3 comments
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  @Jean-Philippe_Rey replied
• [SOLVED] JSON attribute accepts spaces in name but cannot be addressed

  in JavaScript • 4 months, 3 weeks

  

  Hi,
  I just came over a an odd situation:
  I have a structure myData

  var myData={
    'A1':{name:'..'},
    'A2':{name:'..'},
    'A 3':{name:'..'}
  };
  

  I can call myData.A1 as well as myData.A2 but of course myData.A 3 fails because of the space.
  Is it possible that Espruino interpreter should reject attributes containing spaces in the name?

• Controlling puck.js over web BLE

  in Tutorials • 5 months, 1 week

  

  Dont' you have to escape the " on line 8?

  <button onClick="Puck.write('NRF.setAdvertising(­[beacon.get(\"goo.gl/test123\")]);\n');"­>Advertise</button>
  

• Controlling puck.js over web BLE

  in Tutorials • 5 months, 1 week

  

  IMO this doesn't work because at the time you call require("ble_eddystone"), the Puck is already left alone without any link to reach the module source. What you could try is to upload in the Puck a script like

  var beacon=require("ble_eddystone");
  save();
  

  Then on your web page , the command should be <button onClick="Puck.write('NRF.setAdvertising(­[beacon.get("goo.gl/B3J0Oc")]);\n');">Ad­vertise</button>.
  This way, you ensure the module ble_eddystoneis already available on the Puck.

• How to make a Pixl.js connects only to a Peripheral device exposing a HID Keyboard profile?

  @Jean-Philippe_Rey started

  • 2 comments
  • 305 views

  @Gordon replied