every time, i was tried IOT projects with port forwarding on my iptime.

but, that was not well. and i was find some easily way to port forwarding automatically.

the upnp(Universal Plug and Play) has a function for request port forwarding to router and i use it with node js.

I think this project will helping your IOT projects

Step 1: Install Node Js and Project Soruce Code

type this commands in your raspberry pi terminal

sudo apt-get install nodejs # installing node js
sudo apt-get install npm # installing npm (node pakage manager)

you can check node js install succesfully

node -v # version check

and we must be download project source code

github(rpi_onoff_upnp) you can also check the code in this link

cd /home/pi
git clone  https://github.com/keepworking/rpi_onoff_upnp

go to the project directroy and install projects

cd rpi_onoff_upnp
npm install # wait for install finish
npm install onoff # this package using for controling GPIO

try run this project, will print log like this picture

npm start

Step 2: Circuits

connect LED with raspberry pi GPIO 26

you can connect from your smart phone or descktop to this external IPs

it will showing itnerface like this

You will notice that it is much easier to remotely control than port forwarding manually.

I have commented on the feather hub as a source code, so I would like to make it easy to use it. thank you!