LCD 1602/ 2004A Display I2C/ IIC Switch Board Compatible with Arduino

LCD 1602/ 2004A Display I2C/ IIC Switch Board Compatible with Arduino (EL-DLC06002B)

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There are only 20 IO ports in Arduino control boards, if we add some sensors, SD card, relay module and so on, IO port will not be enough. Image when you want to drive the LCD 1602 but without enough IO ports, how terrible? You can save 5 IO ports...
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