A LCD display 20x4 I2C (for the example program) and, optionally, a PC with Excel for the DRO. GRBL version must be >= 0.9 default speed 115200. If you are using a GRBL version < 0.9, default speed 9600 you have to change, in program:

LCD03 - I2C/Serial LCD Technical Documentation . Overview The I2C and serial display driver provides easy operation of a standard 20 x 4 or 16 x 2 LCD Text display. It requires only a 5v power supply and the two data connections for either mode, freeing up pins on your processor. Overview This is a quick tutorial for our 128x64 and 128x32 pixel monochrome OLED displays. These displays are small, only about 1" diagonal, but very readable due to the high contrast of an OLED display. Pengantar LCD I2c Arduino 20?4 dan 16?2. LCD i2c untuk arduino adalah sebuah shield LCD display 20?4 atau 16?2 denga mengubah data i2c menjadi data parallel dengan ic PCF8574. Pada umum nya LCD ini dihubungkan ke Arduino atau atmega non Arduino menggunakan 7 pin. It is I2C LCD. So this tutorial will show you how to display on I2C LCD using Raspberry Pi. You may need to refer following tutorial first: Getting Started with Raspberry Pi Zero W; How to Display on I2C OLED Using Raspberry Pi; Video. I am unable to get multiple I2C displays working. I am using the LCDi2cNHD.h library. When I try 2 LCD's, everything displays on the second LCD. Here is a simple code. I know the I2C addresses are correct, because if I test each one individually they work correctly. Any help? Thanks Hello, I have a backlight enabled LCD that I'm using together with the PCF8574. The wiring and schematics is the same as found in this tutorial from Garagelab, the only difference is the 10k potentiometer that I simply change to a resistor. As in the tutorial, I'm using the LiquidCrystal_I2C library found here. Read From One Register in a Device S A6 A5 A4 A3 A2 A1 A0 0 Device (Slave) Address(7 bits) B7 B6 B5 B4 B3 B2 B1 B0 A Register Address N (8 bits) A START ACK ACK