Puck Lite GetBattery error #4144

espruino-discuss · 2025-02-12T12:25:21Z

espruino-discuss
Feb 12, 2025
Maintainer

Posted at 2023-02-11 by user153457

Hi there, this simple code gives me a

Puck.getBatteryPercentage is not a function
at SVGPathElement. (pucktest.html:47:22)

should it not just work in the web as in the console?

<html>
 <head>
   <style>
     body { margin:0;  }
     svg {
       display:block; position:absolute;
       top:0%; left:0%; width:100%; height:100%;
     }
   </style>    
 </head>
 <body>
  <div>
  <svg viewBox="0 0 24 24">
    <path fill="#000000" d="M12,2A7,7 0 0,0 5,9C5,11.38 6.19,13.47 8,14.74V17A1,1 0 0,0 9,18H15A1,1 0 0,0 16,17V14.74C17.81,13.47 19,11.38 19,9A7,7 0 0,0 12,2M9,21A1,1 0 0,0 10,22H14A1,1 0 0,0 15,21V20H9V21Z" />
  </svg>
  </div>
  <div>
  <button id="btn-stat">Get Status</button>
  </div>
  <script src="https://www.puck-js.com/puck.js"></script>
  <script type="text/javascript">
    // Get the actual curve inside the SVG. You could make differemt
    // parts of a more complex SVG do different things...
    var path = document.getElementsByTagName('path')[0];
    var sync = document.getElementById('btn-stat');
 
    // Make sure your mouse cursor turns into a hand when over it, and gray it out
    path.style="cursor:pointer;fill:#BBB";
    // the possible states we could be in
    var state = 0;
    var states = [
      { color : "#444", command : "digitalWrite([LED1],0);\n" },
      { color : "red", command : "digitalWrite([LED1],1);\n" },
      { color : "green", command : "digitalWrite([LED1],2);\n" },
      { color : "blue", command : "digitalWrite([LED1],4);\n" },
    ];


    // Now send commands to turn the LED on or off
    path.addEventListener("click", function() {
      state++;
      if (state>=states.length)
        state=0;
      path.style.fill=states[state].color;
      Puck.write(states[state].command);

      var bat = Puck.getBatteryPercentage();

    });
  </script>
</body>
</html>

gfwilliams · 2025-02-12T12:25:24Z

gfwilliams
Feb 12, 2025
Maintainer

Posted at 2023-02-22 by @gfwilliams

Hi,

Sorry for the delay. The issue is you're running that command in the web browser, and not on the Puck itself.

For instance to set the LED you do Puck.write("digitalWrite(LED1,1);\n"); not just digitalWrite(LED1,1);

So what you need is:

Puck.eval("Puck.getBatteryPercentage()", function(value) {
  console.log(value);
});

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