Convert struct_message myData back to original format

Posted by: @otto

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Have two ESP32 units, using sketch Code from DroneBot Workshop.  Sending myData successfully to receiving unit and printing on LCD screen successfully.  How do I get the "myData.x" converted back to the original form so I can make decisions/calculations within the receiving unit?

 

// Define a data structure

typedef struct struct_message {

  char a[32];

  int b;

  float c;

  bool d;

} struct_message;




// Create a structured object

struct_message myData;

Not sure what you mean, if you mean working with the individual fields, then syntax like myData.b can be read or changed if on other side of the equation. Is that what you wanted to know?

Not quite following your reply.  Please give an example about the "other side of the equation".  e.g. : a=myData.a

@otto To retrieve data from the structure you would code

b = myData.b;

To store data in the structure you would code

myData.b = b;

Where b is int and myData.b is int

Clear?

of course the char array a requires a little more work, but by now you should understand what is needed.

Ron, thanx very much.  Have put the equations into the code, but haven't had time to test yet, thanks again

@otto Just remember the char array will need appropriate strxxxx or memxxx helpers depending on if the array is really just a char array or is actually a string. Then you must deal with if the string is /0 terminated or not. I am old school but understand there are C++ things to deal with that situation that I am only vaguely aware of. Perhaps one of our C++ members will chime in.