Know your router public IP address, from anywhere. Great for cheap routers or IP cameras. Free.

CloudMyIp is an inexpensive ($3) IOT device that reads the public IP address assigned to your router by your ISP (Internet Service Provider), and publishes it on a web page anyone can read with a link. Great for accessing your home network or IP cameras from abroad, saving the money for a subscription to a dynamic dns service (or the time spent for similar "free" services requiring you to connect and read their ads once a month for continued service).

• an ESP8266 module (e.g. NodeMCU) reads the home network public IP address using the ipify.org API
• the module echoes back the public IP address to the cloud, publishing a "dweet" using the dweet.io APIs.
• a web application running on freeboard.io reads the dweet, and presents the public IP address nicely using any web browser.

Dweets are Tweets for devices. A device (in our case, the ESP8266) can "dweet" a short message on dweet.io. For up to the next 24 hours, anyone can read it pointing his browser to the dweet thing name. If you haven't tried a dweet before, try typing this URL on your browser (or just click the link if you are damn lazy!):

http://dweet.io/dweet/for/yourDweetThingName?hello=world

This is all it takes to send a dweet to the Cloud. Now try to read it:

http://dweet.io/get/latest/dweet/for/yourDweetThingName

Is that simple. Don't even need to register :-)

Dweets are great, but reading them typing a long URL in a browser is annoying. Freeboard makes it simple showing dweets on a nice web dashboard in just few clicks. A free account is all you need. Pages created this way can be read by anyone with the link, and can also be loaded as web apps on your phone desktop, making access super-easy (choose "Add to home screen" on Android).

Replace the following lines with your WiFi network name and password, and yourDweetThingName with something unique to identify your dweets among others (as dweets are public and shared, try to be unique but not too personal). Never insert spaces or special characters here.

const char* ssid = "yourWifi";
const char* password = "yourPassword";
String dweetThingName("yourDweetThingName");

Compile and program your 'duino. Verify on the serial monitor that the board is actually connecting to the WiFi and reporting the IP address. Now you can read the dweets browsing to http://dweet.io/get/latest/dweet/for/yourDweetThingName (crude) or continue setting up a nice and easy dashbord to display it automatically.

Register on freeboard.io and login (please have a look at the tutorial). The next step are easier to follow from a video, I've put one here: Freeboard setup video on youTube. Just be careful to match the "THING NAME" (AlbertoHomeRouter in the video) to what you set as dweetThingName in the Arduino sketch.

Freeboard's "SHARE" button shows a link anyone can use to view your dashboard. In addition, if your browser supports web-applications, you can also create an icon to access it directly like any other app (on the Android browser this is done selecting "Add to home screen" from the "Other" menu).

Enjoy!