Caption

[navdeepssidhu]

Hi, thanks for providing excellent Lib. This is not an issue only a request. Is it possible to add caption to picture sent to telegram bot? Thanks

[navdeepssidhu]

or show timestamp on picture

[navdeepssidhu]

or is it possible to show time stamp on the picture

[cotestatnt]

HI @navdeepssidhu At the moment you can send a picture with caption only from external url, but it is not a limitation of library itself, only my forgetfulness.

The needs of users who use a Telegram bot are many and it is difficult to predict them all from the beginning. For this reason, the Github issues are a valuable source of feedback and suggestions for which I thank you.

I will add the ability to add a caption to the picture (which can therefore also be a timestamp) as soon as I have some time to dedicate to the library!

[cotestatnt]

@navdeepssidhu it was easier than I thought because I had already foreseen the possibility, but leaved unimplemented. It was enough to make the caption an option parameter for sendPhoto() methods.

On this occasion I updated the sendPhoto.ino example. You can find the changes in latest release 2.1.4

[navdeepssidhu]

Thank you so much for your quick work. I will give it a go. Is a timestamp on picture itself possible?

[cotestatnt]

If you intend to merge the timestamp with the image, no it's not possible just using the Telegram API.

You have to use caption field for this purpose.

   ....
  time_t now = time(nullptr);
  struct tm sysTime= *localtime(&now);
  char timestamp[20];

  // https://cplusplus.com/reference/ctime/strftime/
  strftime(timestamp, sizeof(timestamp), "%d/%m/%Y - %T", &sysTime);

  // sendPhoto(const TBMessage &msg, const char* filename, fs::FS &fs, const char* caption = nullptr)
  myBot.sendPhoto(msg, "/telegram-bot1.jpg", FILESYSTEM, timestamp);
  ...

[navdeepssidhu]

Thanks a ton for updating the example.