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1/ My #IoT Telegraph - A thread:
At the end of my talk @NottsTechfast on "The History of IoT", I closed with a show stopper demo. I built a homebrew Telegraph from wood, nails, spring, wire and other components I had around the house. @msdevUK, @MSIoTDevs @MicrosoftIoT #MVPBuzz
2/ The basic circuit diagram of the Telegraph is shown here. The Transmitter side has three 1.5v AA Batteries which connect through the rudimentary Morse Button out to an Electromagnet at the receiver.
3/ The receiver side has two 1.5v AAA batteries connected to three nails. The angled nail is attracted to the Electromagnet when it's activated, closing the circuit and activating the sounder.
4/ However, I didn't think this took the demo far enough! So, I then connected an #ESP8266 into the circuit. I found some code on Morse Code Decoding. Fixed it up to make it work better with the ESP, added numbers & a couple of extra special codes. The circuit became as shown.
5/ The code would spit out the individual decoded letters to the serial console so I could view them onscreen.
6/ The code is available on @github... But... Again, I didn't think that was enough even...…
7/ So, finally, I added the code which would connect the #ESP8266 to an @Azure #IoTHub. The decoded Morse Code message would get sent to Azure & put onto a Service Bus. A @logicappsio would then grab the message & post it to Twitter! The Azure Connected #IoT Telegraph was born!
8/ The code for the completed project is also available on @github... I had such a great time getting all of this to work!…
Actually... That circuit isn't right... This is the correct circuit for the ESP8266... The Circuit was made a broken in the 3v line...
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Keep Current with Pete Gallagher - Azure #MVPBuzz

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