[SOLVED] Javascript on the RPI: GPIOCtrl is not a function

Issue

Hi all I am trying to create a door lock using the following

var gpio = require("pi-gpio");
var gpioPin = 4; 
var isOpened=false; 
var unlock = function(){ 
if(!isOpened){
/* Open the door lock */
gpio.write(gpioPin, 1, function() {
isOpened = true;
});
/*Lock door in 2 seconds*/
setTimeout(function () {
gpio.write(gpioPin, 0, function() {
isOpened = false;
});
}, 2000);}}

then the following:

var http = require('http'); var express = require('express');
var app = express();
var GPIOCtrl = require('./controller.js');
app.get('/unlock/', function(req, res){ 
GPIOCtrl.unlock();
});
app.listen(3000); 
console.log('App Server running at port 3000');

When I run the program I get the message app server running at port 3000, however when I call it I get the following message:

TypeError: GPIOCtrl.unlock is not a function

What am I doing wrong?

Solution

You have to export your module as following in your controller.js :

var gpio = require("pi-gpio"),
  gpioPin = 4,
  isOpened = false,

module.exports = {
  unlock: function() {
    if (!isOpened) {
      /* Open the door lock */
      gpio.write(gpioPin, 1, function() {
        isOpened = true;
      });

      /*Lock door in 2 seconds*/
      setTimeout(function() {
        gpio.write(gpioPin, 0, function() {
          isOpened = false;
        });
      }, 2000);
    }
  }
}

Answered By - Serge K.