ess (0x0000 - 0xFFFF). </td></tr>
    <tr><td class="paramname">data</td><td>Pointer to the source data buffer. </td></tr>
    <tr><td class="paramname">len</td><td>Number of bytes to write. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, -1 if any I2C write operation failed. </dd></dl>
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