|Sheikh Zayed Grand Mosque, Abu Dhabi|
I am aware that people with severe medical conditions are exempt from fasting - this includes diabetics according to what I read. Fasting was not medically recommended for diabetics. This is due to the high chance of hypoglycemia, which can be deadly. I would expect the long days of summer would only increase the risks.
I suggest to read something like this document, or others out there to get more information before you meet with your doctor to discuss fasting. The link I have posted was written by a physician in Egypt, so he understands the importance of Ramadan.
Please do not just read a few articles and try to go it alone. It is important to go to your doctor that manages your diabetes with knowledge and questions. As we know - especially in the case of Type 1, each body is different so may have different requirements.
As the article I posted suggests, also make sure your family, coworkers and others who will be near you throughout the day are all aware of your diabetes and aware of what to do should you need help. We should all be doing this even when it is not Ramadan.
If you do decide that you want to try to fast, speak to your doctor about this before you start. I would also assume some follow up throughout Ramadan would be necessary.