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WPI438 

V. 01 

 22/12/2021 

©Velleman nv 

USER MANUAL 

1.

 

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 Velleman

®

! 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. 
 

2.

 

Safety Instructions 

 

 

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. 

 

 

 

Indoor use only. 
Keep away from rain, moisture, splashing and dripping liquids. 

 

3.

 

General Guidelines 

 

 

Refer to the Velleman

®

 Service and Quality Warranty on the last pages of this manual. 

 

Familiarise yourself with the functions of the device before actually using it. 

 

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 unauthorised 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 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.  

 

Due to constant product improvements, the actual product appearance might differ from 
the shown images.  

 

Product images are for illustrative purposes only. 

 

Do not switch the device on immediately after it has been exposed to changes in 
temperature. Protect the device against damage by leaving it switched off until it has 
reached room temperature. 

 

Keep this manual for future reference. 

 

4.

 

What is Arduino

®

 

Arduino

®

 is an open-source prototyping platform based in 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). 

 
Surf to 

www.arduino.cc

 for more information. 

 

Summary of Contents for WPI438

Page 1: ...WPI438 0 96 INCH OLED SCREEN WITH I2C FOR ARDUINO USER MANUAL ...

Page 2: ...h the functions of the device before actually using it 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 unauthorised way will void the warranty Damage caused by disregard of certain guidelines in this manual is not covered by the warra...

Page 3: ...ution considering their small size resolution 128 x 64 dots viewing angle 160 working voltage 3 to 5 V recommended library U8glib interface I2C driver SSD1306 working temperature 30 C to 70 C OLED colour blue I O level 3 3 5 V dimensions 27 x 27 mm 6 Pin Layout VCC 3 3 5 V power supply Gnd ground SCL serial clock line SDA serial data line 7 Example Connection Vcc 5V Gnd Gnd SCL A5 SDA A4 ...

Page 4: ... c 2012 olikraus gmail com All rights reserved Redistribution and use in source and binary forms with or without modification are permitted provided that the following conditions are met Redistributions of source code must retain the above copyright notice this list of conditions and the following disclaimer Redistributions in binary form must reproduce the above copyright notice this list of cond...

Page 5: ...ultForegroundColor u8g setFontPosTop void u8g_box_frame uint8_t a u8g drawStr 0 0 drawBox u8g drawBox 5 10 20 10 u8g drawBox 10 a 15 30 7 u8g drawStr 0 30 drawFrame u8g drawFrame 5 10 30 20 10 u8g drawFrame 10 a 15 30 30 7 void u8g_disc_circle uint8_t a u8g drawStr 0 0 drawDisc u8g drawDisc 10 18 9 u8g drawDisc 24 a 16 7 u8g drawStr 0 30 drawCircle u8g drawCircle 10 18 30 9 u8g drawCircle 24 a 16 ...

Page 6: ...fset 40 offset 45 offset 30 offset 86 offset 53 offset void u8g_ascii_1 char s 2 uint8_t x y u8g drawStr 0 0 ASCII page 1 for y 0 y 6 y for x 0 x 16 x s 0 y 16 x 32 u8g drawStr x 7 y 10 10 s void u8g_ascii_2 char s 2 uint8_t x y u8g drawStr 0 0 ASCII page 2 for y 0 y 6 y for x 0 x 16 x s 0 y 16 x 160 u8g drawStr x 7 y 10 10 s void u8g_extra_page uint8_t a if u8g getMode U8G_MODE_HICOLOR u8g getMod...

Page 7: ...wStr 0 6 a setScale2x2 u8g undoScale uint8_t draw_state 0 void draw void u8g_prepare switch draw_state 3 case 0 u8g_box_frame draw_state 7 break case 1 u8g_disc_circle draw_state 7 break case 2 u8g_r_frame draw_state 7 break case 3 u8g_string draw_state 7 break case 4 u8g_line draw_state 7 break case 5 u8g_triangle draw_state 7 break case 6 u8g_ascii_1 break case 7 u8g_ascii_2 break case 8 u8g_ext...

Page 8: ...responsible in the event of damage or injury resulting from incorrect use of this device For more info concerning this product and the latest version of this manual please visit our website www velleman eu The information in this manual is subject to change without prior notice COPYRIGHT NOTICE The copyright to this manual is owned by Velleman nv All worldwide rights reserved No part of this manua...

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