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?
Second LCD display does not work
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Ruprecht
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