I have have a OpenCV Windows plugin to read QR code.
But you need to change these in order to work.
"Engine\Plugins\Runtime\OpenCV\Source\ThirdParty\OpenCV\include\opencv2\core\utility.hpp"
* 52 = #if defined(check)
* 53 = # warning Detected Apple 'check' macro definition, it can cause build conflicts. Please, include this header before any Apple headers.
* 54 = #endif
* 934 = bool check() const;
I am working on Android support as well but I can’t give any promise about it. Because there was another clash, too