Trying to upgrade above 5.10.1, but 5.9.0 introduced breaking change for my makeESPArduino. With 5.8.4, while in the project directory of OpenBCI Wifi I am able to ...
#define ARDUINOJSON_DO_CONCAT(A, B) A##B #define ARDUINOJSON_CONCAT2(A, B) ARDUINOJSON_DO_CONCAT(A, B) #define ARDUINOJSON_CONCAT4(A, B, C, D) \ ARDUINOJSON_CONCAT2 ...