Modular assay reader device

An interchangeable module for a diagnostic test device,

• the interchangeable module comprising:
• a housing sized and shaped to engage with a bay of a module interface of the diagnostic test device;
• a barcode scanner configured to image a barcode and to generate barcode data based on the imaged barcode;
• a communication component configured to wirelessly communicate with a remote storage device;
• and
• processing circuitry configured by computer-executable instructions to:
• provide, to a first signal path of the module interface of the diagnostic test device, a first signal comprising module information indicating presence of the barcode scanner in the interchangeable module and connectivity capabilities of the interchangeable module;
• provide, to a second signal path of the module interface of the diagnostic test device, a second signal comprising the barcode data;
• receive, from the diagnostic test device, a test result determined by the diagnostic test device based on changes in optical characteristics of an assay detected at an optical sensor of the diagnostic test device following application of a biological sample to the assay;
• receive, from the diagnostic test device, identification information determined by the diagnostic test device based on the barcode data;
• and
• cause the communication component to send the test result in association with the identification information to the remote storage device.