描述

樹莓派 Raspberry Pi – I2C 2004 LCD Master Board

i2c interface 16×2 & 20×4 LCD socket  ,GPIO interface for 84×48 LCD

Rs-Pi LCD Master can plug-in 84×48 LCD , 16×2 LCD, 20×4 LCD

一、產品特色

1. 8  i2c Port A control  Micro Switch

2. back light control circuit can control by software

3. software LCD contrast control for 84×48 LCD

4. support our Scratch control driver

5. 2 i2c device input port J7 (GND, 5V,SDA,SCL)  &  J8 (GND,3V3,SDA,SCL)

J7 with Logic Level converter

6. build-in 3v3 power regulator provide 3v3  to 84×48 LCD

7. J10  2-3 84X48 LCD back light always ON,  1-2 control by GPIO18

8. 10k Trimpot for 16×2 & 20×4 LCD contrast control

二、應用範例

(1) i2c 20×4 character LCD

command  “LCD2004 ” + “init”   initial  i2c 20×4 LCD

command   “LCD2004 ” + “X , Y ” + ” MESSAGE”   Display message to LCD in location  x,y

command  “LCD2004 ” + “cls”   clean screen

command  “LCD2004 ”  + “bl ” + “on/off”  LCD back light ON / OFF

command  “LCD2004 ” + “X , Y ” + ” wip”   Display WiFi IP  to LCD in location  x,y

command  “LCD2004 ” + “X , Y ” + ” eip”   Display Ethernet IP to LCD in location  x,y

command  “LCD2004 ” + “X , Y ” + ” time”   Display Time to LCD in location  x,y

command  “LCD2004” + “X , Y ” + ” date”   Display Time to LCD in location  x,y

(2) 20×4 RSS function

RSS function ( Scrolling text Display top 3 News message)

BBC world news RSS feed

command “LCD2004 init”   initial  i2c 20×4 LCD

command “LCD2004 bl on” turn on LCD back light

command “LCD2004 “rss”+  ” speed”   Active RSS function (need have internet)

LCD2004 rss 5           speed (1 to 20 –  1 is fast , 20 is slow)

command “LCD2004 rss off”   stop RSS function

(3) new command 8,Jan,2014 update

command   “LCD2004 ” + “X , Y ” + ” ram”   Display RAM usage  in location  x,y

command   “LCD2004 ” + “X , Y ” + ” wifi” + “ ip”  Display WiFi IP  in location  x,y

command   “LCD2004 ” + “X , Y ” + ” wifi” + ” ssid”   Display WiFi SSID in location  x,y

command   “LCD2004 ” + “X , Y ” + ” wifi” + ” gsig”   Display wifi signal with bar chart in location  x,y

(4) multi i2c 20×4 LCD demo

 A = ADDRESS 24, B = ADDRESS 25, C = ADDRESS 26, D = ADDRESS 27

command  “LCD2004 ” + “init”   initial  i2c 20×4 LCD  address 21

command  “LCD2004A ” + “init”   initial  i2c 20×4 LCD  address 24

command  “LCD2004B ” + “init”   initial  i2c 20×4 LCD   address 25

command  “LCD2004C ” + “init”   initial  i2c 20×4 LCD   address 26

command  “LCD2004D ” + “init”   initial  i2c 20×4 LCD   address 27

(5) i2c LCD1602 & i2c LCD 2004   8 switch detect in scratch

(a)broadcast “LCD2004 init”   for 20×4 LCD

(b)after broadcast  “Update”

in Sensing –> Slider , you will see the ” I2C1,I2C2,I2C3,I2C4,I2C5,I2C6,I2C7,I2C8 ”  in the list

三、產品內容

1x Rs-Pi I2C LCD Master board

1x 20×4 LCD

1x User Manual