Naming some nodes, adding dashboards

This commit is contained in:
Juan Manuel Grados Luyando 2023-03-02 19:17:11 +01:00
parent 8bec0b8e9f
commit 8fd28d237c
10 changed files with 443 additions and 45 deletions

88
software/flow/flows.json Normal file → Executable file
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Licensed under the Apache License, Version 2.0 (the "License");
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## node-red-contrib-watt2kwh
A node specifically written to convert power (watts) to energy (kWh).
### Inputs
The node accepts a msg.payload input in the format of a number (example 6) or a string (example "6") provided that the string only contains numbers.
### Outputs
The msg.payload contains the energy output, which can be set in the node config to be;
* Joules
* Watt hour
* Kilowatt hour or
* Megawatt hour
### Details
As the calculation is dependent upon the relationship between the amount of power used, (or generated) **and** the interval between consecutive data points; **interval x power = energy** the very first value fed into the node will not produce an output, because the node requires a second value to be able to calculate the interval between the two values.
After subsequent feed inputs, the node will output the corresponding energy used or generated within that interval.
The Timeout setting in the node's configuration, should be set to at least the maximum interval between successive readings. This is to avoid the situation where for example, a sensor is taken off line, develops a fault or there is a communication problem, resulting in a break of several hours between readings and the calculation - **interval x power = energy** would then be inaccurate.
A common usage is to create a barchart, to show daily energy usage or generation. Using the watt/hour setting, the msg.payload can be fed into the database, for example influx, and then queried within Grafana to produce the barchart; `SELECT sum("energyfeed") FROM "yourdatabase" WHERE $timeFilter GROUP BY time(1d)`
```
[{"id":"d62baedc.ded46","type":"debug","z":"31e18edc.98bdc2","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":740,"y":440,"wires":[]},{"id":"74280b50.f704a4","type":"inject","z":"31e18edc.98bdc2","name":"1 kW feed","topic":"","payload":"1000","payloadType":"str","repeat":"60","crontab":"","once":false,"onceDelay":0.1,"x":420,"y":440,"wires":[["5eb66b22.1a4de4"]]},{"id":"5eb66b22.1a4de4","type":"watt2kwh","z":"31e18edc.98bdc2","format":"kwh","maximum":"5","maximumunit":"mins","name":"","x":580,"y":440,"wires":[["d62baedc.ded46"]]}]
```
The other common usage is to use the data within node-RED, for use in the dashboard or sending it to other devices. In these cases, you may wish to accumulate the node output, for example to calculate how many kWh's are consumed (or generated that day. The flow below, adds each subsequent value, and saves it back to flow context. An inject node then deletes the context value at each midnight.
```
[{"id":"74280b50.f704a4","type":"inject","z":"31e18edc.98bdc2","name":"1 kW feed","topic":"","payload":"1000","payloadType":"str","repeat":"","crontab":"*/1 0-23 * * *","once":false,"onceDelay":0.1,"x":420,"y":470,"wires":[["5eb66b22.1a4de4"]]},{"id":"5eb66b22.1a4de4","type":"watt2kwh","z":"31e18edc.98bdc2","format":"kwh","maximum":"5","maximumunit":"mins","name":"","x":586,"y":470,"wires":[["92e84adc.45c5e8"]]},{"id":"92e84adc.45c5e8","type":"function","z":"31e18edc.98bdc2","name":"Store kwh","func":"var inputVal = msg.payload;\nif (inputVal == \"reset\"){\n flow.set(\"energyVal\",0); \n } else {\nvar savedVal = flow.get('energyVal')||0;\nsavedVal += inputVal;\nflow.set(\"energyVal\",savedVal);\nmsg.payload = savedVal;\nreturn msg;\n}","outputs":1,"noerr":0,"x":740,"y":510,"wires":[["486cc458.d7051c"]]},{"id":"486cc458.d7051c","type":"debug","z":"31e18edc.98bdc2","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":900,"y":510,"wires":[]},{"id":"6a75c8e5.1ee598","type":"inject","z":"31e18edc.98bdc2","name":"reset","topic":"","payload":"reset","payloadType":"str","repeat":"","crontab":"00 00 * * *","once":false,"onceDelay":0.1,"x":600,"y":510,"wires":[["92e84adc.45c5e8"]]}]
```

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[{"id":"8f7657bd13cc9a4b","type":"comment","z":"b3b413d1.05b1b","name":"info","info":"This flow adds each subsequent value, and saves it back to flow context. An inject node then deletes the context value at each midnight.","x":145,"y":1525,"wires":[]},{"id":"74280b50.f704a4","type":"inject","z":"b3b413d1.05b1b","name":"1 kW feed","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"10","crontab":"","once":true,"onceDelay":0.1,"topic":"","payload":"1000","payloadType":"str","x":165,"y":1565,"wires":[["5eb66b22.1a4de4"]]},{"id":"5eb66b22.1a4de4","type":"watt2kwh","z":"b3b413d1.05b1b","format":"kwh","maximum":"5","maximumunit":"mins","name":"","x":331,"y":1565,"wires":[["92e84adc.45c5e8"]]},{"id":"92e84adc.45c5e8","type":"function","z":"b3b413d1.05b1b","name":"Store kwh","func":"var inputVal = msg.payload;\nif (inputVal == \"reset\"){\n flow.set(\"energyVal\",0); \n } else {\nvar savedVal = flow.get('energyVal')||0;\nsavedVal += inputVal;\nflow.set(\"energyVal\",savedVal);\nmsg.payload = savedVal;\nreturn msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":485,"y":1605,"wires":[["486cc458.d7051c"]]},{"id":"486cc458.d7051c","type":"debug","z":"b3b413d1.05b1b","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":645,"y":1605,"wires":[]},{"id":"6a75c8e5.1ee598","type":"inject","z":"b3b413d1.05b1b","name":"reset","repeat":"","crontab":"00 00 * * *","once":false,"onceDelay":0.1,"topic":"","payload":"reset","payloadType":"str","x":345,"y":1605,"wires":[["92e84adc.45c5e8"]]}]

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{
"name": "node-red-contrib-watt2kwh",
"version": "0.1.2",
"description": "A node-RED node that converts a power feed (watts) to energy (kWh).",
"main": "none",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "https://github.com/Paul-Reed/node-red-contrib-watt2kwh.git"
},
"license": "Apache-2.0",
"keywords": [ "node-red", "watt", "kwh", "power", "energy" ],
"node-red" : {
"version": ">=2.0.0",
"nodes" : {
"simpletime": "watt2kwh.js"
}
},
"engines": {
"node": ">=12.0.0"
},
"author": "Paul Reed",
"bugs": {
"url": "https://github.com/Paul-Reed/node-red-contrib-watt2kwh.git/issues"
},
"homepage": "https://github.com/Paul-Reed/node-red-contrib-watt2kwh.git"
}

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<script type="text/javascript">
RED.nodes.registerType('watt2kwh',{
category: 'function',
color: '#A6BBCF',
defaults: {
format: {value:"kwh"},
maximum: {value:"60", validator: function(v) { return !v || !isNaN(v)}},
maximumunit: {value:"mins"},
name: {value:""}
},
inputs:1,
outputs:1,
icon: "power.png",
label: function() {
return this.name||"watt2kwh";
}
});
</script>
<script type="text/x-red" data-template-name="watt2kwh">
<div class="form-row">
<label for="node-input-name"><i class="icon-tag"></i> Name</label>
<input type="text" id="node-input-name" placeholder="Name">
</div>
<div class="form-row">
<label for="node-input-format"><i class="fa fa-envelope"></i> Output Format</label>
<select id="node-input-format">
<option value="j">joule</option>
<option value="kj">kilojoule</option>
<option value="wh">watt hour</option>
<option value="kwh">kilowatt hour</option>
<option value="mwh">megawatt hour</option>
</select>
</div>
<div class="form-row">
<label for="node-input-maximum"><i class="fa fa-history"></i> Timeout</label>
<input type="number" id="node-input-maximum" style="width:180px;">
<select id="node-input-maximumunit" style="width:120px;">
<option value="secs">Seconds</option>
<option value="mins">Minutes</option>
<option value="hours">Hours</option>
</select>
</div>
</script>
<script type="text/x-red" data-help-name="watt2kwh">
<h2 id="noderedcontribwatt2kwh">node-red-contrib-watt2kwh</h2>
<p>A node specifically written to convert power (watts) to energy (kWh).</p>
<h3 id="inputs">Inputs</h3>
<p>The node accepts a msg.payload input in the format of a number (example 6) or a string (example "6") provided that the string only contains numbers.</p>
<h3 id="outputs">Outputs</h3>
<p>The msg.payload contains the energy output, which can be set in the node config to be;</p>
<ul>
<li>Joules</li>
<li>Watt hour</li>
<li>Kilowatt hour or</li>
<li>Megawatt hour</li>
</ul>
<h3 id="details">Details</h3>
<p>As the calculation is dependent upon the relationship between the amount of power used, (or generated) <strong>and</strong> the interval between consecutive data points; <strong>interval x power = energy</strong> the very first value fed into the node will not produce an output, because the node requires a second value to be able to calculate the interval between the two values. </p>
<p>After subsequent feed inputs, the node will output the corresponding energy used or generated within that interval. </p>
<p>The Timeout setting in the node's configuration, should be set to at least the maximum interval between successive readings. This is to avoid the situation where for example, a sensor is taken off line, develops a fault or there is a communication problem, resulting in a break of several hours between readings and the calculation - <strong>interval x power = energy</strong> would then be inaccurate.</p>
<p>For example flows - see the <a href="https://github.com/Paul-Reed/node-red-contrib-watt2kwh/">README</a></p>
</script>

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/**
* Copyright 2019 Paul Reed
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
// Many thanks to @bartbutenaers for the learning experience & support!!
module.exports = function(RED) {
function Watt2kWhNode(config) {
RED.nodes.createNode(this,config);
this.maximum = config.maximum;
var node = this;
//Read the selected output format
const formats = {"j":1e-3, "kj": 1, "wh": 3.6, "kwh": 3600, "mwh": (1e3*3600)};
this.output = formats[config.format] || 0;
//Read the selected timeout value
const units = {"secs": 1, "mins": 60, "hours": 3600};
this.maximum *= units[config.maximumunit] || 0;
// Overule if left blank or negative values selected
if (this.maximum <= 0) {
this.maximum = 3600;
}
node.on('input', function(msg) {
var kwatts = (msg.payload / 1000);
var hrtime = process.hrtime();
var secsnow = ((hrtime[0]) + (hrtime[1] / 1e9));
var lastms = node.lastms||secsnow;
var interval = secsnow - lastms;
// Check if input msg is a number, else warn & exit
if (isNaN (kwatts)){
this.error("The input msg is not a number");
return;
}
node.lastms = secsnow;
// Calculate kilojoules from energy - if interval is OK
if ((interval < this.maximum)&&(interval !== 0)) {
msg.payload = (interval*kwatts)/this.output;
node.send(msg);
} else {
return;
}
});
}
RED.nodes.registerType("watt2kwh",Watt2kWhNode);
}