Publish still has a small bug, but it's unclear if the bug is in
my implementation, or the way Wireshark decodes the MQTT packets.
It seems to miscalculate the length of the data itself; it's not
subtracting the length of the topic name to get the length of the
message, or something along those lines. Further testing will be
needed.
PINGREQ and DISCONNECT are almost identical -- the packets simply
contain the command byte and a 0 for the remaining length. Both
of these have been tested and work perfectly.
Next steps:
Implement subscribe and unsubscribe
Implement events/tasks on receive
Remove testing code, or put in separate branch
Change makefile to create .a (library version that can be linked)
After much consternation, finally got the code generalized. For
some reason the ESP8266 absolutely cannot pass pointers between
functions. I'm not sure if this is because it's a timer function?
Either way, we have to memcpy the values, which makes things a
bit messier, but not too bad.
Now to start work on Publish...
Created a README, as yet incomplete. Added more files to the gitignore
to get rid of emacs temporary files. Currently making the mqtt_send command
independent of connecting, which is all it can do currently.
The code is now pretty messy, as I've just been hacking it
together so far. It's basically hardcoded, so the next steps
will be to parameterise everything. I also need to rethink
the data structures, and function names/structures.
I need to make this feel more like an API to be called by
a user. This will naturally help organize the functions.
