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LCD stands for "Liquid Crystal Display" and is commonly known as a screen. The tag should be used for questions related to LCD display.

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You could have the LCD Arduino be an I2C master and all the weighing Arduinos be slaves. There's an example of master/slave communication and wiring here: https://www.arduino.cc/en/Tutorial/MasterReader. I2C supports up to 128 devices and the wiring is very simple. …
answered Sep 21 '15 by Hans Kilian