What is the possible cause as to why our LCD isn't displaying any text? [pictures attached below]
There are many possible causes!
I think you need to read the forum guide in the sticky post at the top of the forum section.
- We need to see a schematic showing all your component connections.
From the display pattern, you are likely not communicating with the display.
Why that is is impossible to say from 3 pictures of a rats nest of wires that tells no one anything.
- wrong wiring
- wrong code
You should make a minimum sketch that just prints "hello" to the LCD display.
No other things attached to minimize interference.
If that works you are ready to integrate a display in a more complex project.
in addition to the mentioned possible causes
- no library
- wrong library
- wrong I2C address
- swapped SDA / SCL lines (happens to me once a week or more)
- broken wires, connectors
- you did not send text at all
- you did send non printable characters
- your brightness is incorrect
- your display is partially broken
- OK enough
The actual cause can be investigated for if you provide more information.
If you run an I2C scanner you can see if you connected the display correctly.
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