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並前往http://alex9ufoexploer.blogspot.com/2017/11/nodemcu-i2c-1602lcd-lcd-i2c-address.html

NodeMCU I2C 1602LCD問題設定LCD I2C 位址Address 將 ...

好像是LCD模組的接腳位址的問題LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // 設定LCD I2C 位址將0X27換成0X3F

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