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Topic: sainamart lcd2004 connection (Read 41 times) previous topic - next topic


i am working on a project using a 20x4 sainsmart lcd2004 screen. i am using an arduino uno. i have wired vcc to 5v, connected the ground, wired the sda pin to a4 and scl to a5. i am using the address 3f, 20, 4. my screen has power and the contrast is good but there are no characters appearing on the screen and the boxes are very light. i need help with this. thanks


Aug 22, 2015, 05:55 am Last Edit: Aug 22, 2015, 05:56 am by floresta
Try looking at some of the myriad of posts in this forum section dealing with I2C display adapters.

The fact that you are using a particular display is irrelevant, it is the I2C adapter that you must identify if you want help.


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