{"id":9741,"date":"2025-10-16T19:39:49","date_gmt":"2025-10-16T19:39:49","guid":{"rendered":"https:\/\/www.diyipcb.com\/?post_type=product&p=9741"},"modified":"2026-09-27T15:07:30","modified_gmt":"2026-09-27T15:07:30","slug":"lcd-keypad-shield-lcd1602-lcd-1602-module-display-blue-screen-for-arduino-atmega328-atmega2560-raspberry-pi-uno","status":"publish","type":"product","link":"https:\/\/www.diyipcb.com\/de\/produkt\/lcd-keypad-shield-lcd1602-lcd-1602-module-display-blue-screen-for-arduino-atmega328-atmega2560-raspberry-pi-uno\/","title":{"rendered":"LCD-Tastatur-Shield LCD1602 LCD 1602 Modul mit blauem Bildschirm f\u00fcr Arduino ATMEGA328 ATMEGA2560 Raspberry Pi UNO"},"content":{"rendered":"
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1. Display capacity: 16 \u00d7 2 characters<\/span><\/strong><\/div>\n
2. Chip operating voltage: 4.5-5.5V<\/span><\/strong><\/div>\n
3. Operating Current: 2.0mA (5.0V)<\/span><\/strong><\/div>\n
4. Module best working voltage: 5.0V<\/span><\/strong><\/div>\n
5. Character size: 2.95 \u00d7 4.35 (W \u00d7 H) mm<\/span><\/strong><\/div>\n
<\/div>\n

Pin Definitions:<\/span><\/strong><\/h2>\n
1 VSS Power Ground 9 D2 Data<\/span><\/strong><\/div>\n
2 VDD Power Positive 10 D3 Data<\/span><\/strong><\/div>\n
3 VL liquid crystal display bias 11 D4 data<\/span><\/strong><\/div>\n
4 RS Data \/ Command Select 12 D5 data<\/span><\/strong><\/div>\n
5 R \/ W R \/ W Selects 13 D6 data<\/span><\/strong><\/div>\n
6 E Enable signal 14 D7 data<\/span><\/strong><\/div>\n
7 D0 Data 15 BLA Backlight Positive<\/span><\/strong><\/div>\n
8 D1 Data 16 BLK Backlight negative<\/span><\/strong><\/div>\n
1 feet: VSS for the ground power.<\/span><\/strong><\/div>\n
2 feet: VDD 5V power supply is connected.<\/span><\/strong><\/div>\n
3 feet: VL for LCD contrast adjustment side, then the power supply is the weakest contrast, grounding contrast<\/span><\/strong><\/div>\n
Maximum, high contrast will produce “ghosting”, can be used when a 10K potentiometer to adjust the contrast.<\/span><\/strong><\/div>\n
4 feet: RS for the register selection, select the high data register, low when the instruction select register.<\/span><\/strong><\/div>\n
5 feet: R \/ W for the read and write signal lines, high when the read operation, low when the write operation. When RS<\/span><\/strong><\/div>\n
And R \/ W together for the low level can be written to the instruction or display address, when the RS is low when the R \/ W is high<\/span><\/strong><\/div>\n
Can read busy signal, when RS is high level R \/ W is low level can write data.<\/span><\/strong><\/div>\n
6 feet: E-side is enabled, when the E-level jump from high to low, the LCD module to execute the command.<\/span><\/strong><\/div>\n
7 to 14 feet: D0 ~ D7 for the 8-bit bi-directional data lines.<\/span><\/strong><\/div>\n
15 feet: backlight cathode.<\/span><\/strong><\/div>\n
16 feet: backlight negative.<\/span><\/strong><\/div>\n

<\/h2>\n

1602LCD the instructions:<\/span><\/span><\/strong><\/h2>\n
1602 LCD module internal controller a total of 11 control instructions, as shown in the table below:<\/span><\/strong><\/div>\n
\u00a0No. Instruction RS R \/ W D7 D6 D5 D4 D3 D2 D1 D0<\/span><\/strong><\/div>\n
1 Clear screen 0 0 0 0 0 0 0 0 0 1<\/span><\/strong><\/div>\n
2 Cursor Return 0 0 0 0 0 0 0 0 1 *<\/span><\/strong><\/div>\n
3 Set input mode 0 0 0 0 0 0 0 1 I \/ D S<\/span><\/strong><\/div>\n
4 Display On \/ Off Control 0 0 0 0 0 0 1 D C B<\/span><\/strong><\/div>\n
5 Cursor or character shift 0 0 0 0 0 1 S \/ C R \/ L * *<\/span><\/strong><\/div>\n
6 Set Function 0 0 0 0 1 DL N F * *<\/span><\/strong><\/div>\n
7 Set character generation memory address 0 0 0 1 Character generation memory address<\/span><\/strong><\/div>\n
8 Set data memory address 0 0 1 Display data memory address<\/span><\/strong><\/div>\n
9 Read busy flag or address 0 1 BF counter address<\/span><\/strong><\/div>\n
10 Write to CGRAM or DDRAM) 1 0 Data to be written<\/span><\/strong><\/div>\n
11 Read data from CGRAM or DDRAM 1 1 Read the data contents<\/span><\/strong><\/div>\n
1602 LCD module read and write operations, the screen and cursor operations are programmed through the instructions to achieve. (Note: 1 is high, 0 is low)<\/span><\/strong><\/div>\n
Instruction 1: Clear display, instruction code 01H, cursor reset to address 00H.<\/span><\/strong><\/div>\n
Command 2: The cursor is reset and the cursor returns to address 00H.<\/span><\/strong><\/div>\n
Instruction 3: Cursor and display mode setting I \/ D: Cursor moving direction, high level shifting to the right, low level moving left S:<\/span><\/strong><\/div>\n
All text on the screen moves left or right. High level means active, low level is invalid.<\/span><\/strong><\/div>\n
Command 4: Display switch control. D: control the overall display on and off, said high-open display, low power<\/span><\/strong><\/div>\n
Flat display off display C: control cursor on and off, high means that there is a cursor, low level that no cursor B: control<\/span><\/strong><\/div>\n
Whether the cursor is flashing, high level flashing, low level does not flicker.<\/span><\/strong><\/div>\n
Instruction 5: Cursor or display shift S \/ C: Moves the displayed text at high level, and moves the cursor at low level.<\/span><\/strong><\/div>\n
Instruction 6: Function setting command DL: 4-bit bus at high level, 8-bit bus at low level N: Low power<\/span><\/strong><\/div>\n
Usually single-line display, high-level double-line display F: low level display 5×7 dot matrix characters, high level display<\/span><\/strong><\/div>\n
5×10 dot matrix characters.<\/span><\/strong><\/div>\n
Command 7: Character generator RAM address setting.<\/span><\/strong><\/div>\n
Instruction 8: DDRAM address setting.<\/span><\/strong><\/div>\n
Instruction 9: Read busy signal and cursor address BF: Busy flag, high level means busy, then module can not connect<\/span><\/strong><\/div>\n
Command or data received, if the low level that is not busy.<\/span><\/strong><\/div>\n
Command 10: Write data.<\/span><\/strong><\/div>\n
Command 11: Read data.<\/span><\/strong><\/div>\n
\u00a0Compatible with the HD44780 chip timing table is as follows:<\/span><\/strong><\/div>\n
Read status input RS = L, R \/ W = H, E = H Output D0-D7 = Status word<\/span><\/strong><\/div>\n
\u00a0Write command input RS = L, R \/ W = L, D0-D7 = Instruction code, E = High pulse output None<\/span><\/strong><\/div>\n
Read data input RS = H, R \/ W = H, E = H output D0-D7 = data<\/span><\/strong><\/div>\n
Write Data Inputs RS = H, R \/ W = L, D0-D7 = Data, E = High Pulse Output None<\/span><\/strong><\/div>\n

<\/h4>\n

\u00a01602LCD general initialization (reset) process:<\/span><\/span><\/strong><\/h4>\n
Delay 15mS<\/span><\/strong><\/div>\n
Write command 38H (do not detect busy signal)<\/span><\/strong><\/div>\n
Delay 5mS<\/span><\/strong><\/div>\n
Write command 38H (do not detect busy signal)<\/span><\/strong><\/div>\n
Delay 5mS<\/span><\/strong><\/div>\n
Write command 38H (do not detect busy signal)<\/span><\/strong><\/div>\n
After each write command, read \/ write data operations need to detect busy signal<\/span><\/strong><\/div>\n
Write command 38H: Displays the mode setting<\/span><\/strong><\/div>\n
Write command 08H: Display is off<\/span><\/strong><\/div>\n
Write command 01H: Display clear screen<\/span><\/strong><\/div>\n
Write command 06H: Displays the cursor movement setting<\/span><\/strong><\/div>\n
Write command 0CH: Display ON and cursor setting<\/span><\/strong><\/div>\n

<\/h2>\n

AUDUINO official routine:<\/span><\/span><\/strong><\/h2>\n
\/\/ example use of LCD4Bit_mod library<\/strong><\/div>\n
#include <LCD4Bit_mod.h><\/strong><\/div>\n
\/\/ create object to control an LCD.<\/strong><\/div>\n
\/\/ number of lines in display = 1<\/strong><\/div>\n
LCD4Bit_mod lcd = LCD4Bit_mod (2);<\/strong><\/div>\n
\/\/ Key message<\/strong><\/div>\n
Char msgs [5] [15] = { “Right Key OK”,<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0“Up Key OK”,<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0“Down Key OK”,<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0“Left Key OK”,<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0“Select Key OK”};<\/strong><\/div>\n
Int adc_key_val [5] = {30,150,360,535,760};<\/strong><\/div>\n
Int NUM_KEYS = 5;<\/strong><\/div>\n
Int adc_key_in;<\/strong><\/div>\n
Int key = -1;<\/strong><\/div>\n
Int oldkey = -1;<\/strong><\/div>\n
Void setup () {<\/strong><\/div>\n
\u00a0PinMode (13, OUTPUT); \/\/ we’ll use the debug LED to output a heartbeat<\/strong><\/div>\n
\u00a0Lcd.init ();<\/strong><\/div>\n
\u00a0\/\/ optionally, now set up our application-specific display settings, overriding whatever the lcd did in lcd.init ()<\/strong><\/div>\n
\u00a0\/\/lcd.commandWrite(0x0F);\/\/ cursor on, on on, blink on. (Nasty!)<\/strong><\/div>\n
\u00a0 Lcd.clear ();<\/strong><\/div>\n
\u00a0Lcd.printIn ( “KEYPAD testing … pressing”);<\/strong><\/div>\n
<\/div>\n
}}<\/strong><\/div>\n
Void loop () {<\/strong><\/div>\n
\u00a0 Adc_key_in = analogRead (0); \/\/ read the value from the sensor<\/strong><\/div>\n
\u00a0DigitalWrite (13, HIGH);<\/strong><\/div>\n
\u00a0Key = get_key (adc_key_in); \/\/ convert into key press<\/strong><\/div>\n
<\/div>\n
\u00a0 If (key! = Oldkey) \/\/ if keypress is detected<\/strong><\/div>\n
\u00a0 {<\/strong><\/div>\n
\u00a0 \u00a0Delay (50); \/\/ wait for debounce time<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0Adc_key_in = analogRead (0); \/\/ read the value from the sensor<\/strong><\/div>\n
\u00a0 \u00a0Key = get_key (adc_key_in); \/\/ convert into key press<\/strong><\/div>\n
\u00a0 \u00a0If (key! = Oldkey)<\/strong><\/div>\n
\u00a0 \u00a0{<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0Oldkey = key;<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0If (key> = 0) {<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0Lcd.cursorTo (2, 0); \/\/ line = 2, x = 0<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0Lcd.printIn (msgs [key]);<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0}}<\/strong><\/div>\n
\u00a0 \u00a0}}<\/strong><\/div>\n
\u00a0}}<\/strong><\/div>\n
\u00a0\/\/ delay (1000);<\/strong><\/div>\n
\u00a0DigitalWrite (13, LOW);<\/strong><\/div>\n
\u00a0}}<\/strong><\/div>\n
\/\/ Convert ADC value to key number<\/strong><\/div>\n
Int get_key (unsigned int input)<\/strong><\/div>\n
{<\/strong><\/div>\n
\u00a0 Int k;<\/strong><\/div>\n
<\/div>\n
\u00a0 For (k = 0; k <NUM_KEYS; k ++)<\/strong><\/div>\n
\u00a0 {<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0If (input <adc_key_val [k])<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0{<\/strong><\/div>\n
<\/div>\n
\u00a0 \u00a0Return k;<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0}}<\/strong><\/div>\n
\u00a0 }}<\/strong><\/div>\n
<\/div>\n
\u00a0 \u00a0If (k> = NUM_KEYS)<\/strong><\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0K = -1; \/\/ No valid key pressed<\/strong><\/div>\n
<\/div>\n
Return k;<\/strong><\/div>\n
}}<\/strong><\/div>\n
LCD4Bit_mod.h<\/strong><\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Product Customization<\/h3>\n

We support product customization services. Contact us<\/a> to discuss your requirements.<\/p>\n<\/section>\n","protected":false},"excerpt":{"rendered":"

1. Display capacity: 16 \u00d7 2 characters 2. Chip operating voltage: 4.5-5.5V 3. Operating Current: 2.0mA (5.0V) 4. Module best working voltage: 5.0V 5. Character size: 2.95 \u00d7 4.35 (W \u00d7 H) mm Pin Definitions: 1 VSS Power Ground 9 D2 Data 2 VDD Power Positive 10 D3 Data 3 VL liquid crystal display bias…<\/p>","protected":false},"featured_media":6529,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[99,2095,94],"product_tag":[],"class_list":["post-9741","product","type-product","status-publish","has-post-thumbnail","product_cat-displays-hmi","product_cat-display","product_cat-electronic-modules","first","instock","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9741","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/comments?post=9741"}],"version-history":[{"count":0,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product\/9741\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media\/6529"}],"wp:attachment":[{"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/media?parent=9741"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_brand?post=9741"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_cat?post=9741"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.diyipcb.com\/de\/wp-json\/wp\/v2\/product_tag?post=9741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}