The parts are here on Amazon so I'll end with that and note the recipe for the software is at https://raspberrypi.stackexchange.com/questions/67601/pi-3-as-a-wi-fi-repeater
What is the absolute cheapest way to get a Raspberry Pi-style board, which has WiFi, and the ability to provide constant power using solar or other renewable means?
Or even just a really long-lasting battery rather than even renewable energy?
I am looking for links to products that I can buy
1. Board
2. WiFi
3. Power source
By the way, the WiFi chip must have the ability to run a relay... i.e. to be used to receive WiFi from a hotspot, and also to be used as a hotspot itself at the same time.
The device needs to do very little other than receive a WiFi connection and then repeat it in a relay-style, i.e. create a mobile hotspot.

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