text: 
  module.exports = function(RED) {
      "use strict";
      var util = require("util");
      var spawn = require('child_process').spawn;
      var fs = require('fs');
  
      var gpioCommand = __dirname+'/nrgpio';
      var allOK = true;
  
      try {
          var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
          if (cpuinfo.indexOf(": BCM") === -1) {
              RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
              allOK = false;
          }
          else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
              RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
              allOK = false;
          }
          else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
              RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
              allOK = false;
          }
      }
      catch(err) {
          RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
          allOK = false;
      }
  
      function PiLiter(n) {
          RED.nodes.createNode(this,n);
          this.pinv = n.pin;
          this.dir = (n.dir ? 1 : 0) || 0;
          var node = this;
  
          if (allOK === true) {
              if (this.pinv === "bar") {
                  node.child = spawn(gpioCommand, ["byte",node.dir]);
                  node.on("input", function(msg) {
                      var out = Number(msg.payload);
                      if ((out >= 1) && (out <= 8)) { out = Math.pow(2, out) - 1; }
                      else { out = 0; }
                      if (node.child !== null) { node.child.stdin.write(out+"\n"); }
                      else { node.warn("Command not running"); }
                  });
              }
              else if (this.pinv === "meter") {
                  node.child = spawn(gpioCommand, ["byte",node.dir]);
                  node.on("input", function(msg) {
                      var out = Number(msg.payload);
                      if ((out >= 1) && (out <= 8)) { out = Math.pow(2, (out-1)); }
                      else { out = 0; }
                      if (node.child !== null) { node.child.stdin.write(out+"\n"); }
                      else { node.warn("Command not running"); }
                  });
              }
              else if (this.pinv === "all") {
                  node.child = spawn(gpioCommand, ["byte",node.dir]);
                  node.on("input", function(msg) {
                      var out = msg.payload;
                      if ((out === 1)|(out === true)|(out === "1")|(out === "on")) {
                          out = 255;
                      }
                      else { out = 0; }
                      if (node.child !== null) { node.child.stdin.write(out+"\n"); }
                      else { node.warn("Command not running"); }
                  });
              }
              else if (this.pinv === "pin") {
                  node.child = spawn(gpioCommand, ["byte",node.dir]);
                  var byte = 0;
                  node.on("input", function(msg) {
                      if (typeof msg.payload === "object") {
                          var out = Number(msg.payload.led);
                          var l = Number(msg.payload.state);
                          if ((out >= 1) && (out <= 8)) {
                              out = (Math.pow(2, (out-1)));
                              if (l === 0) { byte = (byte & (~out) & 255); }
                              else { byte = (byte | out) & 255; }
                              if (node.child !== null) { node.child.stdin.write(byte+"\n"); }
                              else { node.warn("Command not running"); }
                          }
                          else { node.warn("Not a valid object - see Info panel."); }
                      }
                      else { node.warn("Not a valid object - see Info panel."); }
                  });
              }
              else {
                  node.child = spawn(gpioCommand, ["byte",node.dir]);
                  node.on("input", function(msg) {
                      var out = Number(msg.payload);
                      if ((out >= 0) && (out <= 255)) {
                          if (node.child !== null) { node.child.stdin.write(out+"\n"); }
                          else { node.warn("Command not running"); }
                      }
                      else { node.warn("Invalid input - not between 0 and 255"); }
                  });
              }
  
              node.on("close", function() {
                  if (node.child != null) {
                      node.child.kill('SIGKILL');
                  }
                  if (RED.settings.verbose) { node.log("end"); }
              });
          }
          else {
              node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
          }
      }
      RED.nodes.registerType("rpi-liter",PiLiter);
  }
  