The instant an Arduino or Raspberry Pi connects to the web (with a public IP) it is out there for anyone – or anything – to detect.
In our connected devices class, my classmates and I all saw this vulnerability firsthand. After leaving our connected thermostats on for a week, we experienced our devices being scanned and sometimes attacked by machines from across the globe.
As the technical feasibility of the API to LED project comes together, it is time to consider the physical specifications, including design, construction, and materials. Here is the current conceptual design:
Friday night! The perfect time for expanding on the API-to-LED work from last week. The improvement now offers a more diverse set of information and utilizes duplex serial communication.
The result is that now we can now use a toggle-switch to see the 1-hour price change of either Bitcoin or Ethereum in the form of LED lights. The position of the attached toggle switch determines which currency is being shown.
The programming also features a p5 sketch that reflects the information being sent through the serial.
For example, in the video below Ethereum has had a modest positive 1 hour price change (0.06%), so it lights up the green LEDs a teeny bit. At the same time, Bitcoin has had a larger, negative price change (-1.16%), so it lights up the red LEDs quite a bit.