Gravity: 1602 LCD Keypad Shield

Q: Why my LCD keypad cannot display anything on the <a target="_blank" rel="noopener noreferrer" href="https://www.dfrobot.com/index.php?route=product/product&amp;product_id=1198&amp;search=Intel%C2%AE+Edison+with+Arduino+Breakout+Kit&amp;description=true#.Vdr1ZHkViUk">Intel Edison</a> while all right on <a target="_blank" rel="noopener noreferrer" href="https://www.dfrobot.com/index.php?route=product/product&amp;product_id=1198&amp;search=Intel%C2%AE+Edison+with+Arduino+Breakout+Kit&amp;description=true#.Vdr1ZHkViUk">Romeo</a>?

It works well if uploaded by Arduino 1.5.3 version, however, the latest 1.6.* have discard pin Definition for Edison. So you have to add pinMode(); into the setup() like this:void setup() { for(int i=4;i&lt;10;i++){ pinMode(i,OUTPUT); } lcd.begin(16, 2); // set up the LCD's number of columns and rows }<figure class="image"><img src="https://dfimg.dfrobot.com/nobody/wiki/e6a89f6fe4da1c29deb92098ea584417_0x0.png.webp" alt="DFR0009"></figure>

Q: I do not understand your schematic. There are too many connectors illustrated than are actually on the shield. Could you show me a mapping?

The J1-J8 include the both the user interface, i.e. Analog pins, APC220(Serial) pins, Digital pins, and the pins connected with the lower Arduino card, e.g. Uno/ Leonardo. Here is a simple mapping picture.

Q: I do not understand your schematic. There are too many connectors illustrated than are actually on the shield. Could you show me a mapping?

The J1-J8 include the both the user interface, i.e. Analog pins, APC220(Serial) pins, Digital pins, and the pins connected with the lower Arduino card, e.g. Uno/ Leonardo.

1. Arduino LCD Keypad Shield V1.0

This article provides detailed guidance on using the Arduino LCD Keypad Shield V1.0, including example code, pin allocation, and library usage to enhance Arduino project interfacing.

2. Example Code for Arduino-Temperature Sensor Display

This article offers example code for interfacing an LM35 temperature sensor with an Arduino to read analog input from pin 1 and display the temperature results on an LCD, serving as a practical guide for enthusiasts interested in Arduino projects and sensor integration.

Reference

Parameter	Details
Operating Voltage	5V
Push buttons	5 Push buttons to supply a custom menu control panel
Reset function	RST button for resetting arduino program
Backlight adjustment	Integrate a potentiometer for adjusting the backlight
I/O pins	Expanded available I/O pins
Analog Pinout	Expanded Analog Pinout with standard DFRobot configuration for fast sensor extension
Dimension	80 x 58 mm

Gravity: 1602 LCD Keypad Shield

Specification

Pinout