LCDDisplay

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Introduction

The ESP8266 module can be used to control an I2C LCD Display. Mainly to display sensor values locally.

Hardware

LCDDemo.jpg

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

ESP Easy

Use the device tab on the ESP Easy webinterface and create a new task by editing one of the available tasks. Select "LCD Display" from the dropdown box.

Enter template texts into lines 1 to 4. Plain text will be shown on the display exactly as entered. If you want to show a value, enclose <task name> and <value name> between brackets, separated by a hashtag.

So if you have a dallas sensor running, with taskname "Dallas", to get the temperature value, use this:

 [Dallas#Temperature]

For available System Variables, See:ESPEasy_System_Variables

Check this sample on how to get it done:

EasyConfigLCD.png


(The IDX field will be stuffed with '1', because it's needs a value. But nothing will be sent with this device)

Commands

Command Value Extra information
LCD,<row>,<col>,<text> - Write text messages to LCD screen, ROW for row, COL for starting column, and Text for text.
LCDCMD,<value> on, off, clear Switch on or off the LCD or to clear the display. During the off state, the content will be updated according to the latest values or states.