I2C LCD1602 Display
I2C is a very popular protocol which can exchange data between computer(Master) and its external devices(Slave). A typical I2C slave device must a data pin(SDA) and a clock pin(SCL) which must be connected the SDA and SCL pin of Raspberry Pi Pico. One Pico SDA and SCL pin pair (BUS) can actually connect to multiple slave devices. Each slave device has a unique address ID by which Pico can find it by program.