Systems and methods for enabling optical transmission of data between a sensor and a smart device

A method for fluid measurement testing using a communications adaptor device, for enabling optical communications between a measurement device and a smart device having a screen and a camera and having application software installed therein, the method comprising:

• pairing a measurement dongle, the dongle having one or more LEDS, with the smart device;
• loading a substance for testing onto a sensor or strip/stick;
• loading the sensor or strip/stick onto or into the measurement dongle;
• recording a test measurement on the measurement dongle, from the substance on the inserted strip/stick;
• producing a test measurement signal;
• generating an optical signal representing data from the test measurement;
• transmitting the test measurement data to the camera of the smart device, which uses video capture to record optical signals produced by the one or more LEDs on the measurement dongle;
• verifying the data transmittal, using an optical signal produced by the screen of the smart device, and received by a light sensor on the measurement dongle that is at least partially covering said screen;
• and
• processing and displaying the test measurement data received by the smart device.