So you successfully confiured your RaspberryPi in a fully headless fashion, maybe with WiFi too, and you are very happy using it at home in your robotic projects…
But when you go outside, at work or on any foreign network, once powered and connected to some ethernet cable you do always… get it lost on the net :-(, you have no way to know the ip address. Everything works fine at home, where you have access to the router admin, but when you connect it to the ethernet at work or in other complex enterprise nets there is no way to connect to the RPI.
You will find some ready made solutions for the same ip-address problem, from blinking it on the power led to write it on some usb memory after startup, etc, just google for them if you like.
I will suggest here some ways to get connected to your Raspberry with just the help of your smartphone.
What you will need for this instructable is:
the already configured RPI
a “managed” ethernet/wi-fi router, ie one you can access to get leased ip-addresses
internet access to get/update software and search a solution for ongoing problems
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