It's a slow day and a Friday, so I started thinking, what kind of crap do I have kicking around my home? Well, I have a Raspberry Pi 2 and a cellphone power bank to run it from, enough old cell phones to be considered a hoarder, an RC car that could operate as a platform
My proposal: Old cell phone provides LTE data service to the Rasp Pi via good old 802.11, battery bank provides power to the Raspberry Pi and phone. Rasp Pi hosts a VPN server with a preconfigured IP Sec tunnel back to my home router providing remote access. Rasp Pi drives the RC car.
- IP addresses change: While the address on my home router does not change often enough to be meaningful, it is my experience that the cell phone address changes daily. The first thing the Rasp Pi should do is Email it's external address to aid in trouble shooting. The shared secret won't change between devices.
- Data Service: $20 a month through Mint Mobile gives me 10 GB a month on a 4G pipe so this should be sufficient.
- Getting the Rasp Pi to talk to the car: Neither device was designed to do any of this. I might punk out and go with this guys off the shelf solution: https://www.instructables.com/Raspberry-Pi-Remote-Controlled-Car-1/
- I will have to buy a Pi camera module. $50
Boom. Red neck Mars rover. Thoughts?