I am about to buy my first Raspberry pi (Raspberry pi 3). I will have to order it via the net and it will take a few weeks to arrive, so I decided to make a list of what i really need to buy and what can be substituted with the things I already have at home. It would be sad to wait for other parts to arrive, if I miss something.
I am intended to order only the Raspberry pi 3 itself and a box for it. But there are other parts I have doubts about.
Power. I have a spare Power Bank. It is 12,000 mAh, it has two USB outputs - both 5v, 1A and 2.1A. I assume it can be used to power the pi. I've read that the third pi is more power-consuming. Will my Power Bank still be enough?
Screen. I have an old monitor to use with pi, but another idea came to me - I have some old iPhones. Quick search showed that there are some ways to use it as a screen for pi. However, I am not sure if it can be done with software only. Maybe something Wi-Fi-based, as there is a Wi-fi adapter in pi 3 (there is one, right?) and I also have a good USB Wi-Fi adapter to use with pi and make a pair with iPhone. So, are there any non-harware ways to transmit picture (or at least to use terminal for input-output) using iPhone (jailbreak is not an issue)?
Controls. The mouse and keyboard are not a problem, but I own an old bluetooth keyboard which is SPP-based and it does not work with most of the todays devices. I assume it is more of a driver question, but maybe someone here knows whether it will work or not.