index.js

// index.js - a minimal gopher implementation using node.js
// Released under the 3 clause BSD license by Matt Croydon <mcroydon@gmail.com> (http://postneo.com)
// Fork by Emma Humphries (https://emmah.net/) for silly IoT tricks

var net =        require('net');
var tessel =     require('tessel');
var climatelib = require('climate-si7020');
var climate =    climatelib.use(tessel.port['A']);
var address =    '192.168.1.101';
var port    =    7000;


// ready lights
var len = tessel.led.length;
for (var i = 0; i < len; i++) {
    tessel.led[i].off();
}

climate.on('ready', function() {
    console.log('Connected to climate module.');
    serve();
});

climate.on('error', function(err) {
    console.log('error connecting module', err);
});

function serve() {
    net.createServer(function (socket) {
      socket.setEncoding("ascii");
      socket.on("data", function (data) {
        console.log('data', data);
        if (data === '\r\n') {
            console.log('Serving index.');
            socket.write('Welcome to Tessel Gopher\r\n');
            socket.write('\r\n');
            socket.write('Powered by node.js\r\n');
            socket.write('\r\n');
            socket.write('1About This Service' + '\t' + 'About' + '\t' + address + '\t' + port + '\r\n');
            socket.write('0Local Temperature' + '\t' + 'Temp' + '\t' + address + '\t' + port + '\r\n');
            socket.write('0Local Humidity' + '\t' + 'Humidity' + '\t' + address + '\t' + port + '\r\n');
            socket.write('0Blinken Lights' + '\t' + 'Blink' + '\t' + address + '\t' + port + '\r\n');
            socket.write('.\r\n');
            socket.end();
        }
        else if (data === 'About\r\n') {
            console.log('Serving about file.');
            socket.write('This is a minimal implementation of the gopher protocol using node.js.\r\n');
            socket.write('We\'re bringing the old to the new: Gopher meets IoT. Party time.\r\n');
            socket.end();
        }
        else if (data === 'Temp\r\n') {
            console.log('Reading climate module temp data');
            climate.readTemperature('f', function(err, temp) {
                console.log('Serving climate module temp data');
                socket.write('The current temperature at this device\'s location is ' + temp.toFixed(4) + 'F\r\n');
                socket.end();
            });
        }
        else if (data === 'Humidity\r\n') {
            console.log('Reading climate module humidity data');
            climate.readHumidity(function (err, humid) {
                console.log('Serving climate module humidity data');
                socket.write('The current humidity at this device\'s location is ' + humid.toFixed(4) + '%RH\r\n');
                socket.end();
            });
        }
        else if (data === 'Blink\r\n') {
            console.log('Tenth Doctor Joke Here');
            for(var i = 0; i < 100; i++) {
                for(var j = 0; j < len; j++) {
                    tessel.led[j].on().off();
                }            
            }
            socket.write('Tell the Doctor that the Angels have the Tessel.\r\n');
            socket.end();
        }
        else {
            console.log('Unknown: ' + data);
        }
      });
      socket.on("end", function () {
        console.log('Ending connection.');
        socket.end();
      });
    }).listen(port, address);

    console.log('Server running at ' + address + ':' + port);
}