Large Telegram traffic

[denis-stepanov]

From documentation:

The underlying library Universal-Telegram-Bot uses polling to receive new messages. Frequency of polling determines how quickly bot will react on your commands. The default set in the sketch is 10 seconds, meaning bot will lazily respond to your command anytime between 0 and 10 seconds. In this application it is not important to have fast response, but if you want to make it quicker, change POLL_INTERVAL constant in Telegram.cpp. Note that even with 10 seconds the application generates a lot of traffic (like tens of GB per month). The reason for this is not yet understood — it could be a bug or misuse of the library.

This bug is to investigate the traffic issue.

[denis-stepanov]

This seems to be a "feature", e.g., see open bug reports witnessmenow/Universal-Arduino-Telegram-Bot#148, witnessmenow/Universal-Arduino-Telegram-Bot#143 (comment), etc. All report traffic of similar magnitude. This seem to be somewhat alleviated when long poll is used, but it will block the loop() for long - something we cannot afford.