Seeed Grove 16x2 LCD User manual

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Grove - 16x2 LCD
Grove - 16 x 2 LCD is a perfect I2C LCD display for Arduino and
Raspberry Pi with high contrast and easy deployment. 16x2 means
two lines and each line has 16 columns, 32 characters in total. With
the help of Grove I2C connector, only 2 signal pins and 2 power pins
are needed. You don't even need to care about how to connect
these pins. Just plug it into the I2C interface on Seeeduino or
Arduino/Raspberry Pi+baseshield via the Grove cable. There won't
be complicated wiring, soldering, worrying about burning the LCD
caused by the wrong current limiting resistor.

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Versions
Version Order
The Grove - 16 x 2
LCD (Black on
Yellow)
Buy Now [https://www.seeedstudio.com/Grove-16-x-
2-LCD-%28Black-on-Yellow%29-p-3198.html]
The Grove - 16 x 2
LCD (Black on Red)
Buy Now [https://www.seeedstudio.com/Grove-16-x-
2-LCD-%28Black-on-Red%29-p-3197.html]
The Grove - 16 x 2
LCD (White on Blue)
Buy Now [https://www.seeedstudio.com/Grove-16-x-
2-LCD-%28White-on-Blue%29-p-3196.html]
Except for RGB backlights, these three products are almost
identical to the the Grove - LCD RGB Backlight, they are all 16
characters wide, 2 rows with high brightness backlight.
Pre-reading
An introduction of What is a Grove - 16 x 2 LCD and How does it
work is strongly recommended reading ahead if you are not familiar
with it. Please visit our blog
[https://www.seeedstudio.com/blog/2020/01/20/how-to-use-
Note
The Grove - LCD RGB Backlight [https://wiki.seeedstudio.com/Grove-
LCD_RGB_Backlight/] has been well received since its inception. Based on
customer feedback, now, we bring more cost-effective monochrome
backlight derivative for you.


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16x2-lcd-with-arduino-grove-lcd-rgb-backlight/] for detailed
information.
Features
Display construction: 16 Characters * 2 Lines
Display mode: STN
On board MCU
I2C-bus interface
Support English and Japanese fonts
Specication
Item Value
Operating Voltage 3.3V / 5V
Operating temperature 0 to 50℃
Storage temperature -10 to 60℃
Driving method 1/16 duty, ⅕ bias
Interface I C
I C Address 0X3E
2
2

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Typical Applications
Temperature display
Time display
Any project that requires a simple display
Platforms Supported
Arduino Raspberry ArduPy
Getting Started
Play With Arduino
Materials required
Caution
The platforms mentioned above as supported is/are an indication of the
module's software or theoritical compatibility. We only provide software
library or code examples for Arduino platform in most cases. It is not
possible to provide software library / demo code for all possible MCU
platforms. Hence, users have to write their own software library.


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Seeeduino V4.2 Base Shield
Get One Now
[https://www.seeedstudio.com/Seeeduino-
V4.2-p-2517.html]
Get One Now
[https://www.seeedstudio.com/Base
Shield-V2-p-1378.html]
Hardware Overview
I2C Pull-Up Resistor
Note
Please plug the USB cable gently, otherwise you may damage the port.
Please use the USB cable with 4 wires inside, the 2 wires cable can't
transfer data. If you are not sure about the wire you have, you can click
here [https://www.seeedstudio.com/Micro-USB-Cable-48cm-p-
1475.html] to buy.
Each Grove module comes with a Grove cable when you buy. In case
you lose the Grove cable, you can click here
[https://www.seeedstudio.com/Grove-Universal-4-Pin-Buckled-20cm-
Cable-%285-PCs-pack%29-p-936.html] to buy.


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The rst version of Grove - 16 x 2 LCD series does not have a built-in
pull-up resistor, nor does it provide a pad to solder the optional pull-
up resistor. We have redesigned the module, and the new version
has built-in pull-up resistors.
If you have an older version on your hand, you can solder a 10kΩ
DIP resistor yourself on the back pad of the Grove connector.
Please follow the picture below, solder a 10kΩ DIP resistor between
VCC and SCL pins and a 10kΩ DIP resistor between VCC and SDA
pins.
Outline

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Hardware Connection

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Seeeduino Grove Cable Grove - 16 x 2 LCD
GND Black GND
5V or 3.3V Red VCC
SDA White SDA
SCL Yellow SCL
Step 1. Connect the Grove - 16 x 2 LCD to port I C of Grove-
Base Shield.
Step 2. Plug Grove - Base Shield into Seeeduino and connect
Seeeduino to PC via a USB cable.
Software
Step 1. Download the Grove-LCD RGB Backlight
[https://github.com/Seeed-
Studio/Grove_LCD_RGB_Backlight/archive/master.zip] Library
from Github.
2
Note
If this is the rst time you work with Arduino, we strongly recommend you
to see Getting Started with Arduino
[https://wiki.seeedstudio.com/Getting_Started_with_Arduino/] before the
start.

Tips
The Grove - 16 x 2 LCD shares the same library with the Grove-LCD RGB
Backlight [https://wiki.seeedstudio.com/Grove-LCD_RGB_Backlight/]. Their


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Step 2. Refer to How to install library
[https://wiki.seeedstudio.com/How_to_install_Arduino_Library]
to install library for Arduino.
Step 3. Restart the Arduino IDE. Open the example, you can
open it in the following three ways：
1). Open it directly in the Arduino IDE via the path: File → Examples
→ Grove - LCD RGB Backlight → HelloWorld.
usage is almost the same, except that the Grove - 16 x 2 LCD does not
support the RGB color API, such as setRGB().

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2). Open it in your computer by click the HelloWorld.ino which you
can nd in the folder
XXXX\Arduino\libraries\Grove_LCD_RGB_Backlight-
master\examples\HelloWorld, XXXX is the location you installed
the Arduino IDE.

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3). Or, you can just click the icon in upper right corner of the
code block to copy the following code into a new sketch in the
Arduino IDE.
1#include <Wire.h>
2#include "rgb_lcd.h"
3
4rgb_lcd lcd;
5
6/*
7const int colorR = 255;
8const int colorG = 0;
9const int colorB = 0;
10 */
11
12 void setup()
13 {
14 // set up the LCD's number of columns and rows:
15 lcd.begin(16,2);
16
17 //lcd.setRGB(colorR, colorG, colorB);
18
19 // Print a message to the LCD.
20 lcd.print("hello, world!");
21
22 delay(1000);
23 }
24
25 void loop()
26 {
27 // set the cursor to column 0, line 1
28 // (note: line 1 is the second row, since counting be
29 lcd.setCursor(0,1);
30 // print the number of seconds since reset:

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Step 4. Upload the demo. If you do not know how to upload the
code, please check How to upload code
[https://wiki.seeedstudio.com/Upload_Code/].
31 lcd.print(millis()/1000);
32
33 delay(100);
34 }
Note
The library le may be updated. This code may not be applicable to the
updated library le, so we recommend that you use the rst two
methods.
Since the Grove - 16 x 2 LCD series are all monochrome backlight, you
need to comment out the RGB color related code. In the demo code
above, i.e., line 6 and line 17.

Success
If every thing goes well, you will see the LCD shows the classic sentence:
hello world.


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Note
If there's no Base Shield with you, Seeeduino VX Series with I2C interface
do work as well.


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Play With Wio Terminal (ArduPy)
Hardware
Step 1. Prepare the below stuffs:
Wio Terminal Grove - 16 x 2 LCD
Get One Now
[https://www.seeedstudio.com/Wio-
Terminal-p-4509.html]
Get One Now
[https://www.seeedstudio.com/Grove-
16-x-2-LCD-%28Black-on-Yellow%29-p-
3198.html]
Step 2. Connect Grove - 16 x 2 LCD to I2C port of Wio Terminal.
Step 3. Connect the Wio Terminal to PC through USB Type-C
cable.

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Software
Step 1. Follow ArduPy Getting Started
[https://wiki.seeedstudio.com/ArduPy/] to congure the ArduPy
development environment on Wio Terminal.
Step 2. Make sure that the ArduPy rmware contains the Grove
- 16 x 2 LCD ArduPy library using the following commands. For
more information, please follow here
[https://wiki.seeedstudio.com/ArduPy/#using-aip-to-include-
other-ardupy-librariesfrom-arduino-libraries-example].
Step 3. Copy the following code and save it as ArduPy-
LCD1602.py :
1aip install Seeed-Studio/seeed-ardupy-lcd1602
2aip build
3aip flash
1from arduino import grove_lcd1602
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Step 4. Save the ArduPy-LCD1602.py in a location that you
know. Run the following command and replace
<YourPythonFilePath> with your ArduPy-LCD1602.py
location.
Step 5. We will see the results on the Grove - 16 x 2 LCD.
2import time
3
4lcd = grove_lcd1602()
5
6def main():
7 lcd.print("hello, world!")
8 lcd.is_blink_cursor = True
9 i = 0
10 while True:
11 lcd.set_cursor(1, 2) #column 1, row 2
12 lcd.print(i)
13 time.sleep(1)
14 i = i + 1
15
16 if __name__ == "__main__":
17 main()
Note
For more API reference, please refer to here [https://github.com/Seeed-
Studio/seeed-ardupy-lcd1602].

1aip shell -n -c "runfile <YourPythonFilePath>"
2# Example:
3# aip shell -n -c "runfile /Users/ansonhe/Desktop/ArduPy-L
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Resources
[PDF] JDH_1804_Datasheet
[https://les.seeedstudio.com/wiki/Grove-
16x2_LCD_Series/res/JDH_1804_Datasheet.pdf]
Project
This is the introduction Video of this product, simple demos, you
can have a try.

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All-new Grove Sensor ModuAll-new Grove Sensor Modu……
Grove IR Universal Remote Project：Have multiple remotes? Have
an Arduino? Operate multiple devices with a single press of a Keyes
IR remote.

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Range tests made easy with the RE-Mote and LCD：Reduce the
number of equipment and preparations required for eld testing
(2.4GHz and 868MHz), pack everything you need in your hand.
Tech Support
Please do not hesitate to submit the issue into our forum
[https://forum.seeedstudio.com/]

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[https://www.seeedstudio.com/act-4.html?
utm_source=wiki&utm_medium=wikibanner&utm_campaign=newpr
oducts]