72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
/*
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temperato.py - Driver of querying service
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Copyright (C) 2021,2022 William R. Moore <william@nerderium.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import 'dotenv/config';
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import fetch from 'node-fetch';
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import Koa from 'koa';
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import Router from '@koa/router';
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const PORT = process.env.PORT || 3000;
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const SET_POINT = parseFloat(process.env.SET_POINT);
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const USERNAME = process.env.USERNAME;
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const PASSWORD = process.env.PASSWORD;
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const NOTIF_URL = process.env.NOTIF_URL;
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const MESSAGE = process.env.MESSAGE;
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const SENSOR_URL = process.env.SENSOR_URL;
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const SLEEP_TIMER = 1000;
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const app = new Koa();
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const router = new Router();
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router.get('/', async ctx => {
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try {
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ctx.body = `{"temperature": ${currentSensorReading}}`;
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} catch (e) {
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ctx.body = 'There was an error retrieving the sensor data.';
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ctx.status = 500;
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}
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});
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app
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.use(router.routes())
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.use(router.allowedMethods());
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app.listen(PORT);
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let currentSensorReading=0.0
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async function temperatoTick() {
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try {
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const sensor = await fetch(SENSOR_URL);
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const reading = await sensor.json();
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currentSensorReading = reading.temperature;
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if (reading.temperature >= SET_POINT) {
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const basicAuth = Buffer.from(`${USERNAME}:${PASSWORD}`).toString('base64');
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await fetch(NOTIF_URL, {
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method: 'post',
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body: `{"message": "${MESSAGE}"}`,
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headers: { 'Content-Type': 'application/json', 'Authorization': `Basic ${basicAuth}` },
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});
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}
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} catch (e) {
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console.error(e);
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}
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}
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setInterval(() => temperatoTick(), SLEEP_TIMER);
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