Hi,

Thanks for the report.

Does the compile/upload fail? I ask because you mention the arduino ide which can only "compile/upload" and does not have any intellisense.

If an intellisense error there is some arduino syntax that visual studio doesn't understand or can't easily locate. We can usually modify visual micro slightly to cater for it. I will look into that.

In the meantime you can also patch the intellisense yourself if it annoys you by adding a .h to your project that contains "intellisense only" code (ignored during real compilation). 

I just added an intellisense.h to a project with the code below. The .h file can be called anything. 

The _MSC_VER constant is defined when editing code but not when compiling.

#pragma once

#if _MSC_VER

//insert dummy defs here

extern double atan2(long, long);
double atan2(long y, long x) { return -1; }

#endif

 

tip: You might need to save the .ino or build for the new .h file is recognized my intellisense. You do not need to #include the file in your code.

I had same problem with Intellisense on Due board with strcat function, would compile upload and run correctly on all boards but give Intellisense too many arguments error on Due only. This fixed it. Thanks from me also.