For custom SMS, what are the limits around characters that can be sent? Is there a hard stop (message gets cut off) vs being broken up into multiple texts?
The sms character limit is 160, we can however send multiple messages in sequence, which is what will happen if you create an SMS longer than 160 characters.
From a usability perspective, I would definitely suggest keeping text messages shorter than 160 characters if possible. I know I would definitely be annoyed as a patient if I received a monster 3 sms message from my hospital!
Also if you are putting a URL in the message, I would recommend using bit.ly to shorten it.