Screens may come with different I2C addresses, trying these addresses should help : 0x27 or 0x3f If your display still does not work : Use testing mode in order to show "hello world" on the screen at ...

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Reference circuit diagram of an Arduino-compatible LCD backpack is shown below. What follows next is information on how to use one of these inexpensive backpacks to interface with a microcontroller in ...

This Arduino based Real time clock is a digital clock to display real time using a RTC IC DS1307 which works on I2C protocol. Real time clock means it runs even after power failure. When power is ...