.. _sdk_from_v1: Change from SDK 1.x to 2.x =========================== To replace the SDK version 1.x to 2.x, need to: 1) Install SDK 2, Check the :ref:`sdk` . 2) Upgrade firmware to 2.x version,Check the :ref:`firmware` . 3) After launch the SDK 1.x , the image calibration parameters will be saved in ``/settings/SN*.conf`` .Please check the :ref:`write_img_params` and write ``SN*.conf`` into the devices.