Dia antes primera install

node_modules/i2c-bus/example/mcp9808-async-callback.js

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+'use strict';
+
+const i2c = require('../');
+
+const MCP9808_ADDR = 0x18;
+const TEMP_REG = 0x05;
+
+const toCelsius = rawData => {
+  rawData = (rawData >> 8) + ((rawData & 0xff) << 8);
+  let celsius = (rawData & 0x0fff) / 16;
+  if (rawData & 0x1000) {
+    celsius -= 256;
+  }
+  return celsius;
+};
+
+const i2c1 = i2c.open(1, err => {
+  if (err) {
+    throw err;
+  }
+
+  i2c1.readWord(MCP9808_ADDR, TEMP_REG, (err, rawData) => {
+    if (err) {
+      throw err;
+    }
+
+    console.log(toCelsius(rawData));
+
+    i2c1.close(err => {
+      if (err) {
+        throw err;
+      }
+    });
+  });
+});
+