Hi Jen,

I guess your system is some kind of IoT device. Define a set of instructions and a code value for each instruction (in the simplest case - no parameters - each code value could be just a number), then write a program for your device in which the received code is tested for every possible code value, and if recognized, appropriate action is taken.

In C, that would amount to a switch - case construct, embedded in an endless loop which also contains the receiving process, of course.

However, I'm not sure whether my answer is detailed enough; I feel that a satisfactory answer might take some semesters. ;-)

Hi Joerg,

Thank you for taking time answering my query. I appreciate your response, it gives me an idea; I understand it's not detailed enough but I could already start from here.

God bless