Verify contrast (it could be too low preventing you to see text), you can adjust contrast using the blue potentiometer on the I2C backpack. Check the I2C address ...

LiquidCrystal_I2C lcd(0x27, 16, 2); // run ic2_scanner sketch and get the IC2 address, which is 0x3f in my case,it could be 0x3f in many cases // initialize the library by associating any needed LCD ...

The I2C (Inter-Integrated Circuit) bus is a synchronous serial communication protocol that allows multiple electronic components (sensors, displays, memories, etc.) to be connected within the same ...

This articles describes how you can use I2C (TWI) communication, Arduino and temperature sensors to measure 3 different temperatures. It can be very helpful when you want to measure the outside, ...

Total mastery over the pinout and functionality of the PCA9306 for conversion of logic levels from 5V to 3.3V. A step-by-step interfacing diagram for the PCA9306 to Arduino UNO. Working example with ...