Set subscribe handler data as global

[kannnyyy]

From reference to this, what I understand is that the data is copied as string and put into global char, and each element from data is assigned into global char as an array.

Particle subscription to get a varibale

I wouldn’t copy a string like that since you are going to clobber memory. Instead try this: char myGlobalData[20]; void myHandler(const char *event, const char * data) { strncpy(myGlobalData, data, sizeof(myGlobalData)); myGlobalData[sizeof(myGlobalData) - 1] = '\0'; } Notice that I reserved a character buffer of 20 bytes and then did a limited copy into that buffer of no more than 20 bytes. Add the terminating null just in case the input was longer than 20. Make your array big enou…