I found two pages of documentation that seem to conflict with regard to the TCP driver write back capability.
https://docs.inductiveautomation.com/display/DOC/UDP+and+TCP+Drivers+Module
says the TCP driver can write back to the connected port.
https://docs.inductiveautomation.com/display/DOC/UDP+and+TCP+Driver
says that both UDP and TCP drivers are strictly passive listeners.
Is one of these out of date?