I built a circuit with an Arduino board that integrated a pH and pressure sensor. Unfortunately, I need to change the system to accommodate new instrumentation and software. Would there be a way to wire these sensors to a DB9 female connector? I suppose the question is less to deal with Arduino and more to deal with how to communicate an analog signal through a DB9 connector. Each of the sensors are only connected to the Arduino for the power source, signal, and ground.
Would it be possible to rewire those sensors and 3 wires to a DB9 female connector?