Got the file, sent you some suggestions. Based on your current design, we may not be able to solve all the problems but hoping my suggestions will at least keep sockets cleaner.

There's a way to also set how many sockets that the Pronto can use.

TCPSocket.setSocketLimit(64);

Rather than bump this value which will only hide issues in code, you should consider decreasing to say 8 or 6 from 32. This way, you will start to see more errors if you are using more sockets than you think your code is truly written to use.