I am designing a solar powered Arduino Due for an intelligent small organic farm irrigation control. I am using AdaFruit solar panel and their Li battery charger (http://www.adafruit.com/products/390), plus the AdaFruit boost converter (http://www.adafruit.com/products/2030). This lineup gets me 5.2VDC from a solar/Li battery configuration.
My question is how to connect it to the Due in as native a way as possible.
Vin needs to be between 7-12VDC so I can't use that. I really like AdaFruit and all their boost converters only go to 5VDC hence a bit of a constraint.
My plan was to connect the output of the Boost Converter (USB) directly to the Native USB Programming Port of the Arduino. This would make the native USB port my input power source and I would not use it for communication. I would then use the USB programming port concurrently for programming activities. In the deployed solution it would be only the sun for power and programming port left unconnected.
I understand that the Due is smart enough to select between USB and external power source, but can it contend with my PC also driving 5V on the USB programming port along with my boost converter driving 5V on the native USB port.
Things for sharing any wisdom?