Dia antes primera install

node_modules/i2c-bus/example/i2c-list-busses.js

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+'use strict';
+
+// Determine the bus numbers of the I2C busses available on the current
+// machine and print those bus numbers to the screen.
+
+const glob = require('glob');
+
+const busNumbers = glob.sync('/dev/i2c-*').
+  filter(fileName => fileName.match(/\/i2c-\d+$/) !== null).
+  map(fileName => parseInt(fileName.match(/\d+$/)[0], 10));
+
+console.log(busNumbers);
+
+// Here glob is used synchronously but it can also be used asynchronously.
+// busNumbers is an array of numbers.
+