My application is very simple.
I just want to directly exchange text messages between a PC workstation and an IMP (and its serially connected slave device).
This is to be used in the field (in the middle of nowhere, including at sea, without any link to the web) to control a field instrument (a magnetometer) from a program running on a control workstation.
I can program any type of protocols from the TCP/IP stack in the workstation but I need to know what protocol(s) and addressing format are used now between the agents in the cloud and the IMP in order to use it myself in the workstation. Is it standard HTTP or just TCP sockets? What type of security/encryption? What type of Addressing does the IMP respond to?