2 in 1 vending machine, send mobile top up-recharge prepaid phone and a wifi hotspot to provide internet access
Started as a simple concept by interfacing android mobile device to raspberry pi 3. The idea kicks off, but after a few weeks I ended up in different revisions of the android SDK,nodejs and python script.
A lesson learned from the experience that when the project kicks-off, should not start coding right away, if you will do that then the result was more often codebase will become a tangled mess.
Important step was to create a prototype that wraps the solutions into a rudimentary machine. Tada!! It works, machine was successfully working with hard-work and self determination....
More details and story at: www.hackster.io/christopher-natan