So in conclusion we have established the following:
1) Recipes with all the photos embedded could be quite epic in size. 10-20 MB perhaps.
2) Bluetooth will only send around 100kB in one call.
3) You can implement a state machine at each end to track data sent and re-assemble it plus retransmit lost packets.
Thus to proceed tomorrow I would like to:
1) Alter recipe step rendering code to cleanly omit the image if it’s not present. Thus it will need to cleanly include an icon in edit mode to allow one to be added.
2) Allow sending of recipes via bluetooth with images removed, step 1) implemented first.
3) Allow sending of full recipes via email.
4) Alter image manipulation code to ensure it doesn’t try to shrink images that are already smaller than it’s parameters.
5) If all the above is complete implement code to allow preview images to appear inside emails.
6) If that is complement implement code to allow pdf generation and thus printing.