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Nicla03_FALL_Detection.js
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Nicla03_FALL_Detection.js
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var connectTo = "F5:CB:47:42:E3:BB public";
var primServiceUUID = "19b10000-0000-537e-4f6c-d104768a1214";
var tempCharactUUID = "19b10000-2001-537e-4f6c-d104768a1214";
var co2CharactUUID = "19b10000-9002-537e-4f6c-d104768a1214";
var iaqCharactUUID = "19b10000-9001-537e-4f6c-d104768a1214";
var humCharactUUID = "19b10000-3001-537e-4f6c-d104768a1214";
var preCharactUUID = "19b10000-4001-537e-4f6c-d104768a1214";
var gasCharactUUID = "19b10000-9003-537e-4f6c-d104768a1214";
var accCharactUUID = "19b10000-9004-537e-4f6c-d104768a1214";
var tmpAvg = 0;
var co2Avg = 0;
var iaqAvg = 0;
var preAvg = 0;
var gasAvg = 0;
var tmpBuf = 0;
var co2Buf = 0;
var iaqBuf = 0;
var preBuf = 0;
var gasBuf = 0;
var tmpComp = -5; // temperature calibration
var gatt;
var history = new Float32Array(64);
var choice = 0;
var True = 1;
var False = 0;
var altCalib = True;
var firstTime = True;
require("Font7x11Numeric7Seg").add(Graphics); // Load fonts
// Main menu
var mainmenu = {
"" : {
"title" : "Button=Exit" },
"Level" : function() { choice = 1; bt_connect(); },
"Exit " : function() {load();}, };
g.clear();
E.showMenu(mainmenu);
// *************************
// ****** FUNCTIONS ********
// *************************
function graph(data) {
// quickly move all elements of history back one
history.set(new Float32Array(history.buffer,4));
history[history.length-1] = data;
g.clear();
// Draw Graph
var r = require("graph").drawLine(g, history, {
axes : true,
// miny : 0,
gridy : 5,
padx : 2,
pady : 2,
title: ""
});
g.setFontAlign(1,-1);
g.setFont("Vector",14);
g.drawString(data, r.x+r.w, r.gety(data));
g.flip(); // Update the screen
}
// Displaying data
function show_acc(acc) {
g.setColor(0,0,0);
g.clear();
showMsg(acc.toFixed(2) + "°", 30, 15, g.getHeight()/2 - 30);
}
function showMsg(text, fntSize, x, y) {
g.setFont("Vector", fntSize);
g.drawString(text, x, y);
}
function message(text1, text2, text3, fntSize, x, y) {
g.clear();
showMsg(text1, fntSize, x, y-(fntSize * 1.1));
showMsg(text2, fntSize, x, y);
showMsg(text3, fntSize, x, y+(fntSize * 1.1));
}
function alarm2() {
Bangle.setLCDPower(1);
g.clear();
var t1 = getTime() + 5; // showing message for how many seconds
while(getTime() < t1) {
message(" FALL", " DETECTED !", "", 25, 2, g.getHeight()/2 - 10);
g.flip();
}
var t2 = getTime() + 10; // showing message for how many seconds
var counter = 0;
while(getTime() < t2) {
g.clear();
counter = t2 - getTime();
showMsg("Calling help in" , 25, 2, g.getHeight()/2 - 50);
showMsg(counter.toFixed(0), 40, g.getWidth()/2 - 20, g.getHeight()/2 - 0);
showMsg(" seconds" , 35, 2, g.getHeight()/2 + 50);
g.flip();
}
var t3 = getTime() + 5; // showing message for how many seconds
while(getTime() < t3) {
message("CALLING", "EMERGENCY", "NUMBER", 25, 15, g.getHeight()/2 - 10);
g.flip();
}
g.clear();
}
function alarm() {
for (i = 0; i<10; i++) {
Bangle.setLCDPower(1);
for (j = 0; j<20; j++) {
message(" FALL", " DETECTED !", "", 25, 2, g.getHeight()/2 - 10);
Bangle.setLCDPower(0);
}
g.flip();
Bangle.setLCDPower(1);
}
g.setColor(0,0,0);
}
function bt_connect() {
message(" Connecting", " the dots ...", "", 25, 2, g.getHeight()/2 - 10);
setWatch(function() {
E.showMenu(mainmenu);
choice = 0;
}, BTN, {edge:"rising", debounce:200, repeat:false});
NRF.connect(connectTo).then(function(g) {
gatt = g;
return gatt.getPrimaryService(primServiceUUID);
}).then(function() { return gatt.getPrimaryService(primServiceUUID);
}).then(function(service) { return service.getCharacteristic(accCharactUUID);
}).then(function(ch) {
ch.on('characteristicvaluechanged', function(acc) {
acc = acc.target.value.buffer;
dshAcc = (acc[1] * 256 + acc[0]);
if (dshAcc > 50) {
console.log("FALL DETECTED!");
alarm2();
}
var date = new Date();
var timeStr = require("locale").time(date,1);
message(timeStr, "", "", 50, g.getWidth()/2-70, g.getHeight() / 2 + 30); //fake watch
//if (choice == 1) show_acc(dshAcc);
logTxt = dshAcc.toFixed(4);
console.log(logTxt);
});
return ch.startNotifications();
}).then(function() {
console.log("Subscribed to notifications...");
}).catch(function(e) {
E.showMessage(e.toString(), "ERROR");
console.log(e);
});
}