The paper considers the issue of choosing a data transmission protocol through telecommunication networks for the implementation of a distributed monitoring and diagnostic system for hydrogen solid polymer fuel cells. It has been established that the organization of such systems is potentially possible on the basis of protocols: HTTP, Websockets and UDP, however, to ensure maximum efficiency in making diagnostic decisions, the use of the UDP protocol is preferable. Experimental estimates show that the maximum time to receive a diagnostic message will be no more than 250 ms, and the average is about 125 ms.

Keywords: solid polymer fuel cell, monitoring, diagnostics, distributed system, data transmission protocols, UDP, message delays, telecommunication networks, hydrogen energy, remote control