Some I2C module for 16×2 (1602A) LCD can have pathetic printing to indicate number of pin. If your display does not work with the above code, you can change 0x27 address to 0x3F or 0x26. My issue is when I use lcd.print () to write a string on the LCD, only the first character of the string is printed. I have an I2C LCD screen provided with a Sunfounder kit and certainly built by DFRobot or such a constructor (there is nothing written on the LCD), and an Arduino Uno R3 copy. You can designate the start position with. LiquidCrystalI2Clcd(0x27,2,1,0,4,5,6,7) 0x27 is the I2C bus address for an unmodified module. LCD 1602 I2C shield only shows first character printed. puts(string) writes to the left-top corner of the screen. Reboot.Ĭall the LCD class with a Pin object of your SCL and SDA pin, then write character to the screen by using the. These values can be either a simple text or numerical values read by the sensors, such as temperature or pressure, or even the number of cycles that the. Upload main.py and lib_lcd1602_2004_with_i2c.py to your board. The integration of an LCD display greatly facilitates the interactivity of the project you are developing, allowing the user to directly read some output parameters. Power-up your ESP32 board, adjust the contrast pot on the I2C chip until you see a line of solid blocks and an empty line. If your PCF8574 and LCD scrren comes separately, solder the PCF8574 I2C chip to the screen per the manual.PCF8574 I2C chip SDA - ESP32 GPIO pin 27 (pick your own pin, then modify the GPIO pin number in the code).PCF8574 I2C chip SCL - ESP32 GPIO pin 26 (pick your own pin, then modify the GPIO pin number in the code).Usage Hardware connectionĬonnect your micropython device as follow (my tests uses WEMOS LOLIN32 Lite):
It is modified from a module of micropython Chinese Community repository, with the added feature of creating custom characters and increased efficiency (by about 5~10 times faster for LCD2004 screen). This is a micropython library for using LCD1602 or LCD2004 screen with PCF8574 I2C chip attached.
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