Architecture: WiFi support for WiFi enabled boards ...

I haven't personally done it, but something like this should work fine:

include "jswrap_interactive.h"

void doStuff() {
}

JsVar *func = jsvNewNativeFunction(doStuff, JSWAT_VOID);
jsvUnLock(jswrap_interface_setTimeout(func, 1000/*ms*/, 0));
jsvUnLock(func);