here is my blue lcd output in the test no text show:
i2cLCDguesser v1.4.1
- Guess constructor for i2c LCD backpack
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NOTE/WARNING: Guessing the i2c constructor is not really a
good thing since it could damage the hardware. Use with caution!
Do not leave things with an incorrect guess for too long.
i.e. advance to the next guess as soon as possible
when the guess in incorrect.
If the guess is correct, the constructor will show up
on the LCD.
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<Press <ENTER> or click [Send] to Continue>
Scanning i2c bus for devices..
i2c device found at address 0x23
Device found: PCF8574
<Press <ENTER> or click [Send] to start guessing>
Trying: lcd(0x23, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE)
<Press <ENTER> or click [Send] to Continue>
Trying: lcd(0x23, 2, 1, 0, 4, 5, 6, 7, 3, NEGATIVE)
<Press <ENTER> or click [Send] to Continue>
Trying: lcd(0x23, 4, 5, 6, 0, 1, 2, 3, 7, NEGATIVE)
<Press <ENTER> or click [Send] to Continue>
Trying: lcd(0x23, 6, 5, 4, 0, 1, 2, 3, 7, NEGATIVE)
<Press <ENTER> or click [Send] to Continue>
Trying: lcd(0x23, 6, 5, 4, 0, 1, 2, 3, 7, POSITIVE)
<Press <ENTER> or click [Send] to Continue>
Trying: lcd(0x23, 4, 5, 6, 0, 1, 2, 3, 7, POSITIVE)
<Press <ENTER> or click [Send] to Continue>
Scanning i2c bus for devices..
i2c device found at address 0x23
Device found: PCF8574
<Press <ENTER> or click [Send] to start guessing>