pwm.js

module.exports = function (RED) {
    function PWMNode(config) {
        RED.nodes.createNode(this, config);
        this.plate = RED.nodes.getNode(config.config_plate).plate;
        this.channel = parseInt(config.channel, 10);
        this.output = parseInt(config.output, 10);

        //if (RED.nodes.getNode(config.config_plate).model  == "TINKERplate"){
        //    const conf = {cmd: "setPWMmode", args: {bit: this.output}};
        //    this.plate.send(conf, (reply) => {});
        //}

        var node = this;
        node.on('input', function (msg) { 
           let type = RED.nodes.getNode(config.config_plate).model;
           let channelValid = (((type == "DAQCplate") && (node.channel < 2)) || ((type == "DAQC2plate") && (node.channel < 2)) ||
              ((type == "TINKERplate") && (node.channel > 0)));
           let inputValid = (typeof msg.payload === 'number' && msg.payload >= 0 && msg.payload <= 100);
           if((type == "DAQCplate") && inputValid){msg.payload = parseInt((msg.payload * 1023.0 / 100.0)+0.5)}     
           if (type == "TINKERplate"){
              if (channelValid) {
                 const conf = {cmd: "setPWMmode", args: {bit: node.channel}};
                 node.plate.send(conf, (reply) => {});
              }else {
                 node.status({fill: "red", shape: "ring", text: "invalid channel"});
                 node.log("invalid channel");
              }
           }        

            if(!node.plate.plate_status && inputValid && channelValid){             
                const obj = {cmd: "setPWM", args: {channel: node.channel, value: msg.payload}};
                node.plate.send(obj, (reply) => {
                    node.value = reply.value;
                    node.status({text: node.value});
                    node.send({payload: node.value});
                });
            }else if (node.plate.plate_status == 1) {
                node.status({fill: "red", shape: "ring", text: "invalid plate"});
                node.log("invalid plate");

                node.plate.update_status();
            }else if (node.plate.plate_status == 2) {
                node.status({fill: "red", shape: "ring", text: "missing python dependencies"});
                node.log("missing python dependencies");
            }else if (node.plate.plate_status == 3) {
                node.status({fill: "red", shape: "ring", text: "python process error"});
                node.log("python process error");
            }else if (!channelValid) {
                node.status({fill: "red", shape: "ring", text: "invalid channel"});
                node.log("invalid channel");
            }else if (!inputValid) {
                node.status({fill: "red", shape: "ring", text: "invalid PWM value: ignoring"});
                node.log("invalid PWM value: ignoring");
            }
        });

        this.on('close', function () {
            // cleanup goes here
        });
    }
    RED.nodes.registerType("ppPWM", PWMNode);
}