title: i2c does not detect the address
body: <p>I am using Raspberry Pi, so I have install:</p>
  <pre class="lang-sh prettyprint-override"><code>sudo apt-get -y python-smbus
  sudo apt-get -y i2c-tools
  </code></pre>
  <p>also I have enable I²C from the interface.</p>
  <p>When I type this command: <code>i2cdetect -y 1 ...</code> it does not see the address. I will post a <a href="https://i.stack.imgur.com/yyIxE.png" rel="nofollow noreferrer">picture</a> of it.</p>
  <p>I have no idea how to fix it.</p>