Add Tilt Hydrometer app

apps.json

@@ -2395,5 +2395,17 @@
   "storage": [
     {"name":"gpstimeserver.wid.js","url":"widget.js"}
   ]
+},
+{ "id": "tilthydro",
+  "name": "Tilt Hydrometer Display",
+  "shortName":"Tilt Hydro",
+  "icon": "app.png",
+  "version":"0.01",
+  "description": "A display for the [Tilt Hydrometer](https://tilthydrometer.com/) - [more info here](http://www.espruino.com/Tilt+Hydrometer+Display)",
+  "tags": "tools,bluetooth",
+  "storage": [
+    {"name":"tilthydro.app.js","url":"app.js"},
+    {"name":"tilthydro.img","url":"app-icon.js","evaluate":true}
+  ]
 }
 ]

apps/tilthydro/ChangeLog

@@ -0,0 +1 @@
+0.01: New App!

apps/tilthydro/app-icon.js

@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwggNKgtQESUF5gAEDR8M5nFAwdVAwoWJBxFcDBZEBBZNc4ALJCxQMCMZAiLHgRJHBBBsHGAwHHABAnGFxwoHhhdMLAgRErj8RT4hGQJApGTJAaNQrnMIIJDCLx0F5gACCgZeNhgWDCQMMBIJeNC4ZcEVYpCFrgLBC4wVBRxQTBBYMFqAFBLIQXCRw/MCIp4DAoQXBFhIRFEAIFD4oXECIIfBIgQXHIQQXEZIIXDIgIREBoRyCC4TJE4pEDCIgXIZIpEDJYafBAoYXDIoQ/DAgRLCFgQXGBoNVHIgREHQhkDa4ghEVArtEC4bZBCQZfCSAvFcwoVCC4QnBfQaQDFgokCDwL7DaAjVFC4xvCcQ7UEAAwUCeApAHAAxvDSA4AKRgYbEIRR2GMAoAOCQhIDABpGEJAhGSGoRdOFA8FGBxYIGBsFe5AJJEp0MJJVcKpYMJrg7MBwQ9EKIK0PCIIAEZaAZCqtVS5QA=="))

apps/tilthydro/app.js

@@ -0,0 +1,87 @@
+
+function displayInfo(reading) {
+  g.reset(1).setColor(1,0,0);
+  g.clearRect(0,24,g.getWidth(),g.getHeight()-48);
+    g.drawImage(require("heatshrink").decompress(atob("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")),24,24);
+  g.setColor(-1).setFont("6x8",2);
+
+  if (reading=="startup") {
+    g.setFontAlign(0,0);
+    g.drawString("Scanning...", g.getWidth()/2, g.getHeight()*2/3);
+  } else if (!reading) {
+    g.setFontAlign(0,0);
+    g.drawString("No Tilt found", g.getWidth()/2, g.getHeight()*2/3);
+  } else {
+    g.drawString("Temperature",0,100);
+    g.drawString("Gravity",0,160);
+    g.setFontAlign(0,0);
+    g.drawString(reading.color, g.getWidth()*3/4, 24+40);
+    g.setFontVector(34);
+    g.setFontAlign(0,-1);
+    g.drawString(reading.F.toFixed(1),g.getWidth()/2,120);
+    g.drawString(reading.gravity,g.getWidth()/2,180);
+  }
+  g.flip();
+}
+
+function arrayBufferToHex (arrayBuffer){
+  return (new Uint8Array(arrayBuffer)).slice().map(x=>(256+x).toString(16).substr(-2)).join("");
+}
+
+var TILT_DEVICES = {
+    'a495bb30c5b14b44b5121370f02d74de': 'Black',
+    'a495bb60c5b14b44b5121370f02d74de': 'Blue',
+    'a495bb20c5b14b44b5121370f02d74de': 'Green',
+    'a495bb50c5b14b44b5121370f02d74de': 'Orange',
+    'a495bb80c5b14b44b5121370f02d74de': 'Pink',
+    'a495bb40c5b14b44b5121370f02d74de': 'Purple',
+    'a495bb10c5b14b44b5121370f02d74de': 'Red',
+    'a495bb70c5b14b44b5121370f02d74de': 'Yellow',
+};
+
+var failures = 0;
+
+function takeReading() {
+  // scan for 5 seconds max
+  NRF.setScan(function(device) {
+    d = new DataView(device.manufacturerData);
+    if (d.getUint8(4) == 0xbb) {
+      var hexData = arrayBufferToHex(device.manufacturerData);
+      var tempF = d.getUint16(18);
+      var tempC = ( tempF - 32) * 5 / 9;
+      var gravity = d.getUint16(20) / 1000.0;
+      var color = TILT_DEVICES[hexData.substr(4,32)];
+      readings= {
+        C:tempC,
+        F:tempF,
+        gravity:gravity,
+        d:device.manufacturerData,
+        color: color,
+      };
+      failures=0;
+      NRF.setScan();
+      if (notFoundTimeout) clearTimeout(notFoundTimeout);
+      notFoundTimeout = undefined;
+      displayInfo(readings);
+    }
+  }, { filters: [{ manufacturerData: { 0x004C: {} } }]});
+  // stop scanning after 5 seconds
+  var notFoundTimeout = setTimeout(function() {
+    NRF.setScan();
+    notFoundTimeout = undefined;
+    failures++;
+    if (failures>5) displayInfo();
+  }, 5000);
+}
+
+Bangle.loadWidgets();
+Bangle.drawWidgets();
+
+
+// Scan every minute
+setInterval(function() {
+  takeReading();
+}, 60*1000);
+// Scan once at boot/upload
+displayInfo("startup");
+takeReading();