How to connect 4 pin LCD?


i have lcd gnd, vcc, sda , scl. have arduino uno. i've been trying wire lcd board , have display "hello world" message.

i had gnd connected gnd on uno

the vcc connected 5v

the sda connected a5

the scl connected a4

any help? thanks!!

scl a5  sda a4  for i2c connection. don't forget 4.7k pull resistors.  wire library , liquidcrystal_i2c library code


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