33 lines
926 B
JavaScript
33 lines
926 B
JavaScript
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module.exports = function(RED) {
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var m = require('mraa');
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function gpioAin(n) {
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RED.nodes.createNode(this, n);
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this.pin = n.pin;
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this.interval = n.interval;
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this.x = new m.Aio(parseInt(this.pin));
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this.board = m.getPlatformName();
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var node = this;
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var msg = { topic:node.board+"/A"+node.pin };
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var old = -99999;
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// ADC set to 12 for IOT2050
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if (this.board === "SIMATIC IOT2050") {
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node.x.setBit(12);
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}
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this.timer = setInterval(function() {
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msg.payload = node.x.read();
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if (msg.payload !== old) {
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node.send(msg);
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old = msg.payload;
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}
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}, node.interval);
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this.on('close', function() {
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clearInterval(this.timer);
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node.x.close();
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});
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}
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RED.nodes.registerType("mraa-gpio-ain", gpioAin);
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}
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