1) Used `const char *` instead of `char *` where appropriate, including the need to create a dummy blank string for us in certain places.
2) Set initialization of WiFiClient to 0 instead of NULL, since WiFiClient is not a pointer (probably don't need to set it to anything since WiFiClient overrides the boolean operator anyway).
3) Cleaned up some of the messaging and logic when WiFi tries to connect so that users know to wait a bit.
4) Only remaining warning messages are for casting SpanService to (void *), which I think i unavailable (and is not forbidden).
To Do: Go through examples and check for warnings (will likely need to convert `char *` to `const char *` in many places.
Made Characteristic::PositionState **optional** for Service::WindowCovering. This appears to be a bug/exception in HAP-R2. Need to reflect this in on-line docs.
To do: Create special-handling code for ProgrammableSwitchEvent Characteristic (according to HAP, it has read permission, but must always return a null). Consider adding special flag to PR+EV
Completed macro to use HAPCharType for define Span Characteristic structures. HAPCharType includes name, ID, and permissions. The macro adds value type (e.g. int, double) and default value. To do: Create Span Characteristics for all remaining HAPCharTypes defined in HAPConstants.h
Created HAPCharType and added vectors for required and optional characteristics to every service. Next up: add all HAP characteristic types to HAPCharType
Started adding lists to the first few Services in Service.h. This is a longer-term project to enable HomeSpan to validate a configuration and check that all Services have all required Characteristics and that any optional Characteristics defined are indeed permitted.
Gregg