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jinrys Thank you, this saved my day (I already lost few hours finding solution for non-responding LCD). Link to this sketch is https://playground.arduino.cc/Main/I2cScanner (may be on other websites too). After changing LiquidCrystal_I2C lcd(0x27,16,2); to LiquidCrystal_I2C lcd(0x3F,16,2); LCD works.

ErnstC 05/04/2018
I used the I2C Scanner Sketch to find the appropriate I2C address of this module which in this case was 0x3F. With this the examples worked well.
Pantalla LCD con retroiluminación azul Geekcreit® IIC / I2C 1602 para módulo de pantalla Geekcreit para Arduino - productos compatibles con placas oficiales de Arduino
Pantalla LCD con retroiluminación azul Geekcreit® IIC / I2C 1602 para módulo de pantalla Geekcreit para Arduino - productos compatibles con placas oficiales de Arduino
US$6.89 US$9.99
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