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In the first part of the practical assignment, after I uploaded the sketch in Arduino, I got the message 'Done uploading'. However, the display doesn't show the message like in the video 'practical demo 1'

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I believe your wiring is not quite correct...

  • In electronics it's common to connect the ground GND to the minus (-) and the voltage (5 or 3.3v) to the plus (+). You've done it the other way around (which would work as well but if you'd work with others on some project later on, it can be confusing)
  • The actual problem is that you connected the SCL and SDA of the display to the GND and 5v of the Arduino, while the VCC and GND are connected to port 4 and 5 (you swapped everything)
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