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February 11, 2016 11:46
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A Node server for showing temperature from a sensor on a Raspberry Pi
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| res.writeHead(200, {'Content-Type': 'text/plain'}); | |
| res.write('<html><body><h1>Welcome to W1-TempServ</h1>\n'); | |
| var temp = ''; | |
| fs.readFile('/home/simon/temp', 'utf8', function (err, data) { | |
| if (err) throw err; | |
| console.log(data); | |
| res.write("<p>"+data+"</p></body></html>"); | |
| res.end(); | |
| }); | |
| // Data will not work here because it's outside of the it's scope. | |
| // it was defined in the fs.readFile callback, can't be accessed outside of that | |
| // res.write(data); | |
| //also because of js asynchronicity you'll need to write everything in the callback |
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