Whadda WPI400 User manual

USER MANUAL
EN
3.5”320 x 480 touchscreen for Raspberry Pi
WPI400
whadda.com

2
Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its
lifecycle could harm the environment. Do not dispose of the unit (or batteries) as unsorted
municipal waste; it should be taken to a specialized company for recycling. This device
should be returned to your distributor or to a local recycling service. Respect the local
environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for choosing Whadda! Please read the manual thoroughly before bringing this
device into service. If the device was damaged in transit, do not install or use it and contact
your dealer.
Safety Instructions
Read and understand this manual and all safety signs before using this appliance.
For indoor use only.
•This device can be used by children aged from 8 years and above, and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning the use of the device in a
safe way and understand the hazards involved. Children shall not play with the device.
Cleaning and user maintenance shall not be made by children without supervision.
General Guidelines
•Refer to the Velleman®Service and Quality Warranty on the last pages of this manual.
•All modifications of the device are forbidden for safety reasons. Damage caused by
user modifications to the device is not covered by the warranty.
•Only use the device for its intended purpose. Using the device in an unauthorized way
will void the warranty.
•Damage caused by disregard of certain guidelines in this manual is not covered by the
warranty and the dealer will not accept responsibility for any ensuing defects or
problems.
•Nor Velleman Group nv nor its dealers can be held responsible for any damage
(extraordinary, incidental or indirect) –of any nature (financial, physical…) arising from
the possession, use or failure of this product.
•Keep this manual for future reference.

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What is Arduino®
Arduino®is an open-source prototyping platform based on easy-to-use hardware and
software. Arduino®boards are able to read inputs –light-on sensor, a finger on a button or a
Twitter message –and turn it into an output –activating of a motor, turning on an LED,
publishing something online. You can tell your board what to do by sending a set of
instructions to the microcontroller on the board. To do so, you use the Arduino
programming language (based on Wiring) and the Arduino®software IDE (based on
Processing). Additional shields/modules/components are required for reading a twitter
message or publishing online. Surf to www.arduino.cc for more information.
Product Overview
This 3.5”resistive touchscreen for the Raspberry Pi is perfect for creating portable and
embedded projects where a keyboard and mouse would be in the way.
Specifications
•LCD type: TFT
•LCD interface: SPI
•touch screen type: resistive
•backlight: LED
•resolution: 320 x 480 pixels
•aspect ratio: 8:5
Features
•320 x 480 resolution
•resistive touch control
•supports any revision of Raspberry Pi
•works directly with your Raspbian/Ubuntu
•its size perfectly fits the Raspberry Pi

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Pin Layout
pin #
symbol
description
1, 17
3.3 V
power positive (3.3 V power input)
2, 4
5 V
power positive (5 V power input)
3, 5, 7, 8, 10, 12, 13,
15, 16
NC
NC
6, 9, 14, 20, 25
GND
ground
11
TP_IRQ
touch panel interrupt, low level while the
panel detects touching
18
LCD_RS
instruction/data register selection
19
LCD_SI/TP_SI
SPI data input of LCD/touch panel
21
TP_SO
SPI data output of touch panel
22
RST
reset
23
LCD_SCK/TP_SCK
SPI clock of LCD/touch panel
24
LCD_CS
LCD chip selection, low active
26
TP_CS
touch panel chip selection, low active
Example
Required Hardware
•1 x Raspberry Pi 1/2/3 main board
•1 x microSD card (> 8 GB, image file ± 7.5 GB)
•1 x microSD card reader
•1 x microUSB cable
•1 x USB keyboard
•3.5” LCD module (WPI400)
Required Software
•SD formatter
•Win32Disklmager
•Raspberry Pi OS IMAGE
•LCD driver

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Connection
1. Format the SD card. Open SDFormatter, select your SD card and click <Format>.
2. Burn the Raspberry Pi OS IMAGE onto the SD card. Open Win32Disklmager, select the
file and SD card, and click <Write>. The burning process may take a few minutes.

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3. Make the hardware connection. Connect the WPI400 screen to the Raspberry Pi. Wait
for the device to switch on.
Note that your screen might not show anything if the driver hasn't been installed yet.

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Driver Installation
Obtaining the LCD Driver –Online Installation
Log onto the Raspberry Pi user system to command line (initial username: pi, password:
raspberry).
Get the newest driver from GitHub (the Raspberry Pi should be connected to the Internet).
git clone https://github.com/goodtft/LCD-show.git chmod -R 755 LCD-
show
cd LCD-show/
Installing the LCD Driver
The corresponding execution for this 3.5” LCD:
sudo ./LCD35-show
The corresponding execution to switch back to the traditional HDMI display:
sudo ./LCD-hdmi
Wait for a moment after executing the above command before you can use the LCD.

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Modifications and typographical errors reserved - © Velleman Group nv. WPI400_v01
Velleman Group nv, Legen Heirweg 33 - 9890 Gavere.