In this thesis, internal/external electrical signalling, as well as the impedance of several in-vivo (plants) systems, is studied. A brief introduction of intrinsic (natural) intra-plant communications is the foundation of an elemental intra-plant communication framework (that consists of easy-to-obtain components) that achieves prominent results employing an S-OOK modulation scheme. The latter enables the idea of inter alia, collect and transmit plant's health information through it. For instance, a Heat Pulse Velocity Sensor sensing could exploit this principle by measuring Sap Flow and using the plant as a communication channel. Subsequently, the development of an automated impedance measurement scheme with a simultaneous monitoring system is discussed extensively for practical usability and future reference.