A method, control module and extracorporeal blood treatment apparatus are provided for transferring data from said extracorporeal blood treatment apparatus. Data is retrieved pertaining to an operation of the apparatus, the data is encoded into a machine readable graphical representation for decoding at a remote server to recover the retrieved data and displaying the machine readable graphical representation as an image on the display to allow capture of the displayed image with an image capturing device and transmission of the image from the image capturing device to a remote server over a communication channel.