Second LCD display does not work

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Ruprecht
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Joined: 04 Nov 2016, 10:02
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Second LCD display does not work

#1 Post by Ruprecht » 04 Nov 2016, 10:41

I bought a second LCD display. The old display 2x16 works fine with i2c address 0x27. The new display 4x20 with i2c address 0x3f works alone properly.

However, when I try to connect both displays together, the display 4x20 shows nothing and the display 2x16 jumps and tries (unsuccessfully) to display both the values ​​of 2x16 and the 4x20.

My entries were correct because both display are working individually correct. Where is the mistake?

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