Touchscreen calibration

1. Use the Raspberry OS that we provide



2. Use at yourself Raspbian OS

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If your Raspbian version is older than 2017-03-02-raspbian-jessie such as 2017-01-11-raspbian-jessie

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If your Raspbian version is 2017-03-02-raspbian-jessie or newer than 2017-03-02-raspbian-jessie