MaBe

Most recent activity

• NRF51822 Generic iBeacon

  in Other Boards • 5 days, 12 hours

  

  check this link NRF51TAG.py

• read an high precision adc like hx711

  in General • 1 week, 3 days

  

  First approach to tare a scale with multiple calls and median filter.

  var SCK = D23,
      DOUT = D24;
  
  scale = require('HX711').connect({
      sck: SCK,
      miso: DOUT,
  });
  
  
  function filterMedian(values) {
      var samples = values.length,
          median;
      var i = Math.floor(samples / 2);
      values.sort(function(a, b) { return a - b; });
      if (samples % 2) { //even
          median = (values[i] + values[i + 1]) / 2;
      } else { // odd
          median = values[i];
      }
      return median;
  }
  
  function scaleTare(samples, scale, cb) {
      var values = new Array(samples);
      var tare = function(x) {
          if (!scale.miso.read())
              values[x] = scale.readRaw();
          if (++x === samples) {
              scale.zero = filterMedian(values);
              cb();
          }
      };
  
      function setIntervalX(samples, delay, cb) {
          var x = 0;
          var id = setInterval(function() {
              cb(x);
              if (++x === samples) {
                  clearInterval(id);
              }
          }, delay);
      }
      // 100ms deleay is needed when HX711 is in 10Hz mode to read another value
      // maybe add sps value to options  like sps:10 = 100ms, sps:80 = 12,5ms
      setIntervalX(samples, 100, tare);
  }
  
  setTimeout(() => { scaleTare(10, scale, () => { console.log("scale is now tared"); }); }, 1E3);
  

  Any hints and tweaks are welcome.

• read an high precision adc like hx711

  in General • 1 week, 5 days

  

  this.spi.send(new Uint8Array([c,c,c,c,c,c,finalClk]));

  It does - Thanks!

  Now there are 25 pulses for "A128" without any delays in between and pulse width is valid compared to the datasheet

• read an high precision adc like hx711

  in General • 1 week, 6 days

  

  Question: Is there a fix to eliminate the pause between sending the next byte?

• Espruino on ESP32

  @MaBe started

  • 15 comments
  • 2,372 views

  @Allen replied
• read an high precision adc like hx711

  in General • 2 weeks

  

  Did some test with HX711 module and PuckJS running 2v08.82

  https://github.com/espruino/EspruinoDocs­/blob/master/devices/HX711.js

  Added an overview and detail screenshot for a scale.readRaw() using the HX711.js module.

  Does that HX711 return look correct?

• Error connect to ESP8266 in WinIDE

  in ESP8266 • 1 month, 3 weeks

  

  Hm, how did you flash Espruino?

• bolidJS

  in Projects • 1 month, 3 weeks

  

  or for apple fan

  https://apps.apple.com/de/app/ble-joysti­ck/id1098200556

• How to draw lines thicker than 1px

  @MaBe started

  • 2 comments
  • 620 views

  @HughB replied
• How to use a variable in an argument ?

  in JavaScript • 1 month, 3 weeks

  

  @Guillaume_G take a look at this file

  https://github.com/espruino/BangleApps/b­lob/master/apps/scolor/show-color.js