130 lines
3.4 KiB
JavaScript
130 lines
3.4 KiB
JavaScript
{
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var dataFile = "smartbattdata.json";
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var interval;
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var storage=require("Storage");
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var logFile = "smartbattlog.json";
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function getSettings(){
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return Object.assign({
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//Record Interval stored in ms
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doLogging:false
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}, require('Storage').readJSON("smartbatt.settings.json", true) || {});
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}
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function logBatterySample(entry) {
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let log = storage.readJSON(logFile, 1) || [];
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// Keep it from growing forever (optional: only keep last 100 entries)
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if (log.length > 100) log.shift();
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log.push(entry);
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storage.writeJSON(logFile, log);
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}
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// Record current battery reading into current average
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function recordBattery() {
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let now = Date.now();
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let data = getData();
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let batt = E.getBattery();
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let battChange = data.battLastRecorded - batt;
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let deltaHours = (now - data.timeLastRecorded) / (1000 * 60 * 60);
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// Default reason (in case we skip)
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let reason = "Recorded";
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if (battChange <= 0) {
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reason = "Skipped: battery fluctuated or no change";
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if(Math.abs(battChange)<5){
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//less than 6% difference, average percents
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var newBatt=(batt+data.battLastRecorded)/2;
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data.battLastRecorded = newBatt;
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}else{
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//probably charged, ignore average
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data.battLastRecorded = batt;
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}
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storage.writeJSON(dataFile, data);
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} else if (deltaHours <= 0 || !isFinite(deltaHours)) {
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reason = "Skipped: invalid time delta";
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data.timeLastRecorded = now;
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data.battLastRecorded = batt;
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storage.writeJSON(dataFile, data);
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} else {
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let currentDrainage = battChange / deltaHours;
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let newAvg = weightedAverage(data.avgBattDrainage, data.totalHours, currentDrainage, deltaHours);
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data.avgBattDrainage=newAvg;
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data.timeLastRecorded = now;
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data.totalCycles += 1;
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data.totalHours+=deltaHours;
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data.battLastRecorded = batt;
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storage.writeJSON(dataFile, data);
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reason = "Drainage recorded: " + currentDrainage.toFixed(3) + "%/hr";
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}
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if(getSettings().doLogging){
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// Always log the sample
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logBatterySample({
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time: now,
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battNow: batt,
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battLast: data.battLastRecorded,
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battChange: battChange,
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deltaHours: deltaHours,
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avgDrainage: data.avgBattDrainage,
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reason: reason
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});
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}
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}
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function weightedAverage(oldValue, oldWeight, newValue, newWeight) {
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return (oldValue * oldWeight + newValue * newWeight) / (oldWeight + newWeight);
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}
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function getData() {
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return storage.readJSON(dataFile, 1) || {
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avgBattDrainage: 0,
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battLastRecorded: E.getBattery(),
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timeLastRecorded: Date.now(),
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totalCycles: 0,
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totalHours:0
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};
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}
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// Estimate hours remaining
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function estimateBatteryLife() {
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let data = getData();
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var batt = E.getBattery();
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var hrsLeft = Math.abs(batt / data.avgBattDrainage);
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return {
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batt: batt,
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hrsLeft: hrsLeft,
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};
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}
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function deleteData(){
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storage.erase(dataFile);
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storage.erase(logFile);
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}
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// Expose public API
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exports.record = recordBattery;
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exports.deleteData = deleteData;
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exports.get = estimateBatteryLife;
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exports.changeInterval = function(newInterval) {
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clearInterval(interval);
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interval=setInterval(recordBattery, newInterval);
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};
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// Start recording every 5 minutes
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interval=setInterval(recordBattery, 600000);
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recordBattery(); // Log immediately
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}
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