* process "IL", "AR" and "MON"
* discard "BMV" and (unsolicited) History Data
* simplify isDataValid()
* veMpptStruct, veStruct: new, verbose variable names, including units,
and replace floats (save values with original integer precision)
* comment on rollover situation in isDataValid()
* show charge controller temperature in live view
* send hex requests right after decoding a frame. this seems to have the
best chance of getting an answer to all requests.
* deem 0xFFFFFFFF value of network total DC power as invalid indicator.
neither network state, nor network info, nor network mode seem to
indicate that the charge controller is part of a VE.Smart network. for
that reason, we revert to always querying the network total DC power
value, but testing it for max(uin32_t) value, which seems to indicate
that the charge controller is not part of a VE.Smart network.
* improve (verbose) logging, e.g., use _logId, and print names of
response codes and known registers, always print error messages,
add additional tests to prevent overly verbose messages.
* move hex protocol definitions to VeDirectData.h header
and use enum classes
* define register addresses in enum class
* move values retrieved through hex protocol into main MPPT data struct
* do not send HEX requests if the serial interface cannot send data
* detect whether smart battery sense temperature is available
* web app: make all VE.Direct sub-cards iterable. this makes addind more
values much simpler and saves a bunch of code in the web app.
* make VeDirectFrameHandler state a type-safe enum class
* unindent MPPT controller loop()
* whitespace cleanup
double precision floating point numbers are not needed to handle
VE.Direct values. handling double is implemented in software and hence
*much* more resource intensive.
queue every text event until the frame was checked by it checksum. then
process the data directly into the buffer struct. do not clear the
buffer struct, so it will always include the most recent value of a
particular data point.
