LCDDisplay
Jump to navigation
Jump to search
Contents
Introduction
The ESP8266 module can be used to control an I2C LCD Display.
Hardware
Connect the LCD Display to the I2C interface. This display works with 5 volt VCC, but the I2C connections should be "floating". The 2004 display from "Funduino" that we used in our testlab could be connected without levelshifters.
Connections
WARNING: Some LCD Modules might have pullup resistors to 5 volts VCC. In that case a levelshifter should be used
LCD ESP-01 GND GND VCC - SDA GPIO 0 SCL GPIO 2
Software
Custom sketch
ESP Easy
ESP Connexio
Command:
LCDI2CWrite <line>,<column position>, <data command>, <data option>
Parameter: | Description: | Range: | Comments: |
---|---|---|---|
Line | Linenumber | 1-2 (of 1-4) | |
Column | Column position | 1-16 (1-20) | |
data command | Message, Clock, IP, PortInput, Variable, Event | ||
data option | In case of Message: label id of text to be shown | Message:1-20 |
Sample
LCDWrite 1,1,Message,1