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/target
sensors*.db
x.csv

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[package]
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edition = "2018"
authors = ["Arne Keller <arne.keller@posteo.de>"]
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# sensor-dashboard
Simple webpage to display gathered temperature and humidity data.
## License
### papaparse.js
Source: https://github.com/mholt/PapaParse
License: MIT
### uPlot
Source: https://github.com/leeoniya/uPlot
License: MIT
### This project
Copyright © 2023 Arne Keller
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.

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"use strict";
let dataX = [];
let dataY = [];
let dataY2 = [];
let dataY3 = [];
let xMin = Number.MAX_SAFE_INTEGER;
let xMax = 0;
function buttonsPlugin(opts) {
return {
hooks: {
ready: u => {
function zoomRange(seconds) {
u.setScale('x', {
min: xMax - seconds,
max: xMax
});
}
const day = document.getElementById("day");
day.addEventListener("click", e => {
zoomRange(60 * 60 * 24);
});
const week = document.getElementById("week");
week.addEventListener("click", e => {
zoomRange(60 * 60 * 24 * 7);
});
document.getElementById("all").addEventListener("click", e => {
u.setScale('x', {
min: xMin,
max: xMax
});
})
}
}
};
}
function processCSV() {
let plotData = [dataX, dataY, dataY2];
let opts = {
title: "Temperature and humidity stats",
id: "chart1",
class: "my-chart",
width: document.getElementById("plot").clientWidth,
height: 600,
plugins: [
buttonsPlugin({})
],
scales: {
x: {
time: true,
range: (u, dataMin, dataMax) => {
if ((dataMax - dataMin) % (60 * 60 * 24) === 0) {
return [dataMin, dataMax];
} else {
return [dataMin, Math.ceil(dataMax / (24 * 60 * 60)) * 24 * 60 * 60];
}
}
},
y: {
auto: true,
// always show zero
// https://github.com/leeoniya/uPlot/issues/143#issuecomment-595251878
/*
range: (u, dataMin, dataMax) => {
let [min, max] = uPlot.rangeNum(dataMin, dataMax, 0.2, true);
return [
Math.min(0, min),
Math.max(0, max),
];
}
*/
},
"%": {
//range: [0, 100]
auto: true,
},
},
series: [
{
label: "t",
value: "{YYYY}-{MM}-{DD} {HH}:{mm}",
class: "monospace"
},
{
label: "temperature",
class: "monospace",
width: 1,
stroke: `rgba(230, 180, 0, 100%)`,
drawStyle: 0, // line
lineInterpolation: 0, // linear
spanGaps: true,
//paths
},
{
label: "relative humidity",
scale: "%",
class: "monospace",
width: 1,
stroke: `rgba(35, 50, 255, 100%)`,
drawStyle: 0, // line
lineInterpolation: 0, // linear
spanGaps: true,
//paths
},
/*
{
label: "absolute humidity",
scale: "grams/m³",
class: "monospace",
width: 2,
stroke: `rgb(85, 100, 255)`,
drawStyle: 0, // line
lineInterpolation: 0, // linear
spanGaps: true,
//paths
}
*/
],
axes: [
{
//label: "Zeit",
labelSize: 20,
values: [[3600 * 24, "{D}.{M}.{YY}\n{H}:{mm}", null, null ]]
},
{
space: 50,
scale: "%",
label: "RH",
},
{
space: 50,
side: 1,
label: "°C",
},
],
};
document.getElementById("plot").innerHTML = "";
let uplot = new uPlot(opts, plotData, document.getElementById("plot"));
uplot.setCursor({left: 10000, top: 0}); // show latest values instantly
uplot.cursor.lock = true;
let legendEl = document.querySelector(".u-legend");
legendEl.classList.remove("u-inline");
document.getElementById("buttons").style.display = "";
// mobile view: activate 24h initially
setTimeout(() => {
const vw = Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0)
const vh = Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0)
if (vh > vw) {
document.getElementById("day").click();
}
}, 500);
}
Papa.parse('./x.csv', {
delimiter: ",",
header: true,
download: true,
step: function(row) {
if (row.errors.length > 0) {
return;
}
const t = Number(row.data["time"]);
dataX.push(t);
if (t > xMax) {
xMax = t;
}
if (t < xMin) {
xMin = t;
}
dataY.push(Number(row.data["celsius"]) / 10.0);
dataY2.push(Number(row.data["humidity"]) / 10.0);
//dataY3.push(Number(row.data["abs_humidity"]));
},
complete: processCSV,
});

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Sensor dashboard</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="./uPlot.min.css">
<link rel="shortcut icon" href="./favicon.ico">
<style>
body {
padding: 0;
margin: 0;
overflow-x: hidden;
}
#buttons {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
}
button {
padding: 0.5em;
margin: 0.75em;
font-size: x-large;
}
</style>
</head>
<body>
<div id="plot"></div>
<div id="buttons" style="display: none">
<button id="day">24 hours</button>
<button id="week">7 days</button>
<button id="all">all data</button>
</div>
<script src="./uPlot.iife.min.js"></script>
<script src="./papaparse.js"></script>
<script src="./base.js"></script>
</body>
</html>

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import http.server
import os
import time
import math
import subprocess
class RefreshingHandler(http.server.SimpleHTTPRequestHandler):
def do_GET(self):
# check whether x.csv is up to date
if self.path.endswith("x.csv"):
mtime = os.stat('/run/user/pi/x.csv').st_mtime
current = math.floor(time.time() / (60 * 10)) * 60 * 10
if mtime < current:
print("refreshing data... old:", mtime, "now:", current)
print("result", subprocess.run(['sh', '-c', './target/release/sensor-dashboard sensors.db > /run/user/pi/x.csv']))
super().do_GET()
# derived from: https://github.com/python/cpython/blob/3.11/Lib/http/server.py
if __name__ == '__main__':
import contextlib
handler_class = RefreshingHandler
directory = os.getcwd()
# ensure dual-stack is not disabled; ref #38907
class DualStackServer(http.server.ThreadingHTTPServer):
def server_bind(self):
# suppress exception when protocol is IPv4
with contextlib.suppress(Exception):
self.socket.setsockopt(
socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
return super().server_bind()
def finish_request(self, request, client_address):
self.RequestHandlerClass(request, client_address, self,
directory=directory)
http.server.test(
HandlerClass=handler_class,
ServerClass=DualStackServer,
port=24473,
bind=None,
protocol="HTTP/1.1",
)

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use rusqlite::Connection;
fn main() {
let db = Connection::open("sensors.db").unwrap();
let mut get_values = db.prepare("SELECT time,celsius,humidity FROM sensor_readings ORDER BY time ASC").unwrap();
let mut values = get_values
.query_map([], |row| Ok((row.get(0).unwrap(), row.get(1).unwrap(), row.get(2).unwrap(), true)))
.unwrap()
.map(Result::unwrap)
.collect::<Vec<(i64, i64, i64, bool)>>();
values[0].3 = false;
// exclude clearly wrong values
let window_size = 8;
for i in window_size..values.len() {
let avg = values[i-window_size..i].iter().map(|x| x.1).sum::<i64>() / window_size as i64;
if avg.abs_diff(values[i].1) >= 40 && (i == 0 || values[i].0 - values[i-1].0 < 5000000) && i < values.len() - 5 {
values[i].3 = false;
}
}
// exclude outliers (> X °C diff and not between consecutive values)
// remember, measurements are done once every 10 minutes
// it is unlikely the temp. will sway by 2.4 ° C in that timeframe
windows_mut_each(&mut values, 3, |vars| {
if vars[1].0 - vars[0].0 >= 5000000 {
return;
}
if vars[1].1.abs_diff(vars[0].1) >= 19 && vars[1].1 > vars[0].1 && vars[1].1 > vars[2].1 {
vars[1].3 = false;
}
// spike down
if vars[1].1.abs_diff(vars[0].1) >= 19 && vars[1].1 < vars[0].1 && vars[1].1 < vars[2].1 {
vars[1].3 = false;
}
// check for humidity too
if vars[1].2.abs_diff(vars[0].2) >= 30 && vars[1].2.abs_diff(vars[2].2) >= 30 {
vars[1].3 = false;
}
});
println!("time,humidity,celsius"); // ,abs_humidity
for (time, celsius, rh, keep) in values {
if keep {
//let t = celsius as f64 / 10.0;
//let ah = (6.112 * E.powf((17.67 * t)/(t + 243.5)) * (rh as f64 * 10.0) * 2.1674) / (273.15 + t);
println!("{},{},{}", time, rh, celsius);//, ah);
}
}
}
// https://users.rust-lang.org/t/iterator-over-mutable-windows-of-slice/17110/6
fn windows_mut_each<T>(v: &mut [T], n: usize, mut f: impl FnMut(&mut [T])) {
let mut start = 0;
let mut end = n;
while end <= v.len() {
f(&mut v[start..end]);
start += 1;
end += 1;
}
}

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.uplot, .uplot *, .uplot *::before, .uplot *::after {box-sizing: border-box;}.uplot {font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";line-height: 1.5;width: min-content;}.u-title {text-align: center;font-size: 18px;font-weight: bold;}.u-wrap {position: relative;user-select: none;}.u-over, .u-under {position: absolute;}.u-under {overflow: hidden;}.uplot canvas {display: block;position: relative;width: 100%;height: 100%;}.u-axis {position: absolute;}.u-legend {font-size: 14px;margin: auto;text-align: center;}.u-inline {display: block;}.u-inline * {display: inline-block;}.u-inline tr {margin-right: 16px;}.u-legend th {font-weight: 600;}.u-legend th > * {vertical-align: middle;display: inline-block;}.u-legend .u-marker {width: 1em;height: 1em;margin-right: 4px;background-clip: padding-box !important;}.u-inline.u-live th::after {content: ":";vertical-align: middle;}.u-inline:not(.u-live) .u-value {display: none;}.u-series > * {padding: 4px;}.u-series th {cursor: pointer;}.u-legend .u-off > * {opacity: 0.3;}.u-select {background: rgba(0,0,0,0.07);position: absolute;pointer-events: none;}.u-cursor-x, .u-cursor-y {position: absolute;left: 0;top: 0;pointer-events: none;will-change: transform;z-index: 100;}.u-hz .u-cursor-x, .u-vt .u-cursor-y {height: 100%;border-right: 1px dashed #607D8B;}.u-hz .u-cursor-y, .u-vt .u-cursor-x {width: 100%;border-bottom: 1px dashed #607D8B;}.u-cursor-pt {position: absolute;top: 0;left: 0;border-radius: 50%;border: 0 solid;pointer-events: none;will-change: transform;z-index: 100;/*this has to be !important since we set inline "background" shorthand */background-clip: padding-box !important;}.u-axis.u-off, .u-select.u-off, .u-cursor-x.u-off, .u-cursor-y.u-off, .u-cursor-pt.u-off {display: none;}