feat: discover other rpi's and setup them

[mxmaxime]

When I plug a new rpi (or other devices in the future), I want it to register to the system automatically. So for instance I want a new security camera, I plug it with the software and that's it, everything's done for me.

To see:

• mDNS: discovery protocol for something like a LAN.
• Zero-configuration networking
• Universal Plug and Play

Listen for new connection

I was searching about "mqtt discovery", and I found this tutorial which talks about $SYS topics. Then I found this wiki with a list and description about these topics.

I need to declare what the device is doing, for instance "hey, I'm a dumb camera" or "hey, I'm a smart camera" and so one...

…generated device_id

⚠️ You have to run nmap as root to have access to mac addresses.

I can't set rpi hostname before boot: https://www.raspberrypi.org/forums/viewtopic.php?t=184248

#!/bin/bash

model=$(ssh pi@mx_rpi 'bash -s' < scripts/rpi/get_rpi_model.sh)
echo "Device model: $model" 

Different devices

Of course our system will be composed by connected devices from Philips, Ikea... We don't have any control over these devices so we will have other process to discover & register them in the system. This PR is about setting up our devices: raspberrypi and maybe esp.

Sources

• awk used to find ip/vendor to detect whether or not the ip is corresponding to a raspberry pi.