72 lines
2.8 KiB
HTML
72 lines
2.8 KiB
HTML
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<!DOCTYPE html>
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<!--
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Copyright 2016 IBM Corp.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<script type="text/x-red" data-template-name="pimcp3008">
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<div class="form-row">
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<label for="node-input-mode"><i class="fa fa-map-pin"></i> Input pin</label>
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<select type="text" id="node-input-pin" style="width:150px;">
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<option value=0>A0</option>
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<option value=1>A1</option>
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<option value=2>A2</option>
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<option value=3>A3</option>
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<option value=4>A4</option>
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<option value=5>A5</option>
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<option value=6>A6</option>
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<option value=7>A7</option>
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<option value="M">set by msg.payload</option>
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</select>
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</div>
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<div class="form-row">
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<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name"/>
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</div>
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</script>
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<script type="text/x-red" data-help-name="pimcp3008">
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<p>Reads from an MCP3008 Analogue to Digital Converter (ADC) chip on the Pi SPI CE0 connection,
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such as the rasp.io/analogzero.</p>
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<p>You can either set a channel in the edit dialogue, or you can set the <code>msg.payload</code>
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to select the channel dynamically. If so then the expected payload must be a value from 0 to 7.</p>
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<p>Outputs a numeric <code>msg.payload</code> with a range of 0 to 1023, representing 0V to 3.3V.</p>
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<p><i>Hint</i>: use a <code>range</code> node to re-scale the values to ones you want.</p>
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<p>Also sets <code>msg.topic</code> to <i>adc/{the pin number}</i></p>
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<p><b>Warning</b>: Input voltages must not exceed 3.3V</p>
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<p>The SPI bus must be enabled for this node to work. This can be achieved by using the
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advanced menu (option 9 A5) of the raspi-config utility.</p>
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</script>
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<script type="text/javascript">
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RED.nodes.registerType('pimcp3008',{
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category: 'Raspberry Pi',
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paletteLabel: 'A/D converter',
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color: "#c6dbef",
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defaults: {
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name: {value:""},
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pin: {value:0, required:true}
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},
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inputs: 1,
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outputs: 1,
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icon: "rpi.png",
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label: function() {
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return this.name || "ADC "+((this.pin==="M")?"":this.pin);
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},
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labelStyle: function() {
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return this.name?"node_label_italic":"";
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}
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});
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</script>
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