Review on ✨ Weewooday 8-Piece IIC/I2C/TWI LCD Serial Interface Adapter and LCD Module Display Backlight Set - Arduino R3 MEGA2560 Compatible (LCD 1602 16x2, Blue) by Crystal Keenan
The default contrast is set to nothing
After playing around with it for a long time, I finally found out that the default contrast setting is set to zero. This way they will look like they don't work at all. So turn on that contrast setting if you expect them to do anything.
- understandable even for the old
- Some little things
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