Oakchris1955 Oakchris1955

## imageUrl.txt
https://imgur.com/a/NmyWf13

## main.md

      
        
          
            
              
              1 file
            
          
          
            
              
              0 forks
            
          
          
            
              
              0 comments
            
          
          
            
              
              0 stars
            
          
        
        
          
              
          
          
            
                Oakchris1955
                / main.md
            
            
              Created
              December 18, 2022 13:58
            
              
                Use an I2C-backpacked LCD on the Raspberry Pi with the wiringPi C library
              
          
        
      
        
  
      
    To begin with, wiringPi is a C library mainly used to interface with the Raspberry Pi's GPIO. The library actually includes a LCD header (it is part of the wiringPi dev library, so you must include it as wiringPiDev). However, what wiringPi doesn't include is a LCD header for I2C-backmounted LCDs. Most of the time, the I2C backpack module is just a GPIO expander that communicates with the LCD in 4-bit mode (that is, it only uses 4 data pins instead of 8. While data are sent at half speed, they are still set so fast that you can't tell if an LCD operates in 4-bit or 8-bit mode). We are assuming your LCD can operate in 4-bit mode and that the schematic of your I2C backpack is similar to that of https://manualzz.com/doc/8253437/i2c-lcd-backpack-schematic.

Firstly, check if the wiringPi library is already installed by typing:

gpio readall
to the terminal. If you get something like:
Unable to determine board type