node-red-nodes/hardware/pigpiod/pi-gpiod.js

module.exports = function(RED) {
    "use strict";
    var Pigpio = require('js-pigpio');

    var bcm2pin = {
        "2":"3", "3":"5", "4":"7", "14":"8", "15":"10", "17":"11", "18":"12", "27":"13", "22":"15",
        "23":"16", "24":"18", "10":"19", "9":"21", "25":"22", "11":"23", "8":"24", "7":"26",
        "5":"29", "6":"31", "12":"32", "13":"33", "19":"35", "16":"36", "26":"37", "20":"38", "21":"40"
    };
    var pinTypes = {
        "PUD_OFF":RED._("pi-gpiod:types.input"),
        "PUD_UP":RED._("pi-gpiod:types.pullup"),
        "PUD_DOWN":RED._("pi-gpiod:types.pulldown"),
        "out":RED._("pi-gpiod:types.digout"),
        "pwm":RED._("pi-gpiod:types.pwmout"),
        "ser":RED._("pi-gpiod:types.servo")
    };

    function GPioInNode(n) {
        RED.nodes.createNode(this,n);
        this.host = n.host || "127.0.0.1";
        this.port = n.port || 8888;
        this.pin = n.pin;
        this.pio = bcm2pin[n.pin];
        this.intype = n.intype;
        this.read = n.read || false;
        this.debounce = Number(n.debounce || 25);
        var node = this;
        var PiGPIO;

        if (node.pin !== undefined) {
            PiGPIO = new Pigpio();
            var inerror = false;
            var doit = function() {
                PiGPIO.pi(node.host, node.port, function(err) {
                    if (err) {
                        node.status({fill:"red",shape:"ring",text:err.code+" "+node.host+":"+node.port});
                        if (!inerror) { node.error(err); inerror = true; }
                        node.retry = setTimeout(function() { doit(); }, 5000);
                    }
                    else {
                        inerror = false;
                        PiGPIO.set_mode(node.pin,PiGPIO.INPUT);
                        PiGPIO.set_pull_up_down(node.pin,PiGPIO[node.intype]);
                        PiGPIO.set_glitch_filter(node.pin,node.debounce);
                        node.status({fill:"green",shape:"dot",text:"node-red:common.status.ok"});
                        node.cb = PiGPIO.callback(node.pin, PiGPIO.EITHER_EDGE, function(gpio, level, tick) {
                            node.send({ topic:"pi/"+node.pio, payload:Number(level) });
                            node.status({fill:"green",shape:"dot",text:level});
                        });
                        if (node.read) {
                            setTimeout(function() {
                                PiGPIO.read(node.pin, function(err, level) {
                                    node.send({ topic:"pi/"+node.pio, payload:Number(level) });
                                    node.status({fill:"green",shape:"dot",text:level});
                                });
                            }, 20);
                        }
                    }
                });
            }
            doit();
        }
        else {
            node.warn(RED._("pi-gpiod:errors.invalidpin")+": "+node.pio);
        }

        node.on("close", function(done) {
            if (node.retry) { clearTimeout(node.retry); }
            node.status({fill:"grey",shape:"ring",text:"pi-gpiod.status.closed"});
            node.cb.cancel();
            PiGPIO.close();
            done();
        });
    }
    RED.nodes.registerType("pi-gpiod in",GPioInNode);


    function GPioOutNode(n) {
        RED.nodes.createNode(this,n);
        this.host = n.host || "127.0.0.1";
        this.port = n.port || 8888;
        this.pin = n.pin;
        this.pio = bcm2pin[n.pin];
        this.set = n.set || false;
        this.level = parseInt(n.level || 0);
        this.out = n.out || "out";
        this.sermin = Number(n.sermin);
        this.sermax = Number(n.sermax);
        if (this.sermin > this.sermax) {
            var tmp = this.sermin;
            this.sermin = this.sermax;
            this.sermax = tmp;
        }
        if (this.sermin < 5) { this.sermin = 5; }
        if (this.sermax > 25) { this.sermax = 25; }
        var node = this;
        var PiGPIO;

        function inputlistener(msg) {
            if (msg.payload === "true") { msg.payload = true; }
            if (msg.payload === "false") { msg.payload = false; }
            var out = Number(msg.payload);
            var limit = 1;
            if (node.out !== "out") { limit = 100; }
            if ((out >= 0) && (out <= limit)) {
                if (RED.settings.verbose) { node.log("out: "+msg.payload); }
                if (node.out === "out") {
                    PiGPIO.write(node.pin, msg.payload);
                }
                if (node.out === "pwm") {
                    PiGPIO.set_PWM_dutycycle(node.pin, parseInt(msg.payload * 2.55));
                }
                if (node.out === "ser") {
                    var r = (node.sermax - node.sermin) * 100;
                    PiGPIO.setServoPulsewidth(node.pin, parseInt(1500 - (r/2) + (msg.payload * r / 100)));
                }
                node.status({fill:"green",shape:"dot",text:msg.payload.toString()});
            }
            else { node.warn(RED._("pi-gpiod:errors.invalidinput")+": "+out); }
        }

        if (node.pin !== undefined) {
            PiGPIO = new Pigpio();
            var inerror = false;
            var doit = function() {
                PiGPIO.pi(node.host, node.port, function(err) {
                    if (err) {
                        node.status({fill:"red",shape:"ring",text:err.code+" "+node.host+":"+node.port});
                        if (!inerror) { node.error(err,err); inerror = true; }
                        node.retry = setTimeout(function() { doit(); }, 5000);
                    }
                    else {
                        PiGPIO.set_mode(node.pin,PiGPIO.OUTPUT);
                        if (node.set) {
                            setTimeout(function() { PiGPIO.write(node.pin,node.level); }, 25 );
                            node.status({fill:"green",shape:"dot",text:node.level});
                        } else {
                            node.status({fill:"green",shape:"dot",text:"node-red:common.status.ok"});
                        }
                        // if (node.out === "pwm") {
                        //     PiGPIO.set_PWM_frequency(1000);
                        //     PiGPIO.set_PWM_range(1000);
                        // }
                    }
                });
            }
            doit();
            node.on("input", inputlistener);
        }
        else {
            node.warn(RED._("pi-gpiod:errors.invalidpin")+": "+node.pio);
        }

        node.on("close", function(done) {
            if (node.retry) { clearTimeout(node.retry); }
            node.status({fill:"grey",shape:"ring",text:"pi-gpiod.status.closed"});
            PiGPIO.close();
            done();
        });
    }
    RED.nodes.registerType("pi-gpiod out",GPioOutNode);
}