gen4-Internet of Displays Series DATASHEET DOCUMENT DATE: 05th March 2019 DOCUMENT REVISION: 1.2 gen4-IoD-24T (Resistive touch) gen4-IoD-28T (Resistive touch) gen4-IoD-32T (Resistive touch) Uncontrolled Copy when printed or downloaded. Please refer to the 4D Systems website for the latest Revision of this document W W W . 4 D S Y S T E M S . C O M . A U Table of Contents Table of Contents 1. Description ...................................................................................................................4 2. Features .......................................................................................................................4 3. Hardware Overview ......................................................................................................5 4. Hardware Interface - Pins .............................................................................................6 4.1. Serial Ports - TTL Level Serial ........................................................................................ 6 4.2. System Pins .................................................................................................................... 6 4.3. SPI - (Used internally).................................................................................................... 6 5. ESP8266 SoC .................................................................................................................7 6. SD/SDHC Memory Cards ...............................................................................................7 7. FCC Cable .....................................................................................................................7 8. Application PCB Support ...............................................................................................7 9. Display/Module Precautions .........................................................................................8 10. Hardware Tools ............................................................................................................8 10.1. Programming Adaptor ................................................................................................... 8 11. Internal / External Antenna...........................................................................................9 12. FCC Cable Orientation ...................................................................................................9 13. Programming the IoD .................................................................................................. 10 13.1. Arduino IDE .................................................................................................................... 10 13.2. Additional Libraries ........................................................................................................ 10 13.3. 4D Systems - Workshop 4 IDE ....................................................................................... 11 14. Starter Kit ................................................................................................................... 12 15. Display Module Numbers ............................................................................................ 12 16. Mechanical Details - gen4-IoD 2.4'' ............................................................................. 13 17. Mechanical Details - gen4-IoD 2.8'' ............................................................................. 14 18. Mechanical Details - gen4-IoD 3.2 ............................................................................... 15 19. Mechanical Details - 4D - Universal Programming Adaptor .......................................... 16 20. Schematic Details - gen4-IoD Display .......................................................................... 17 21. Schematic Details - 4D - Universal Programming Adaptor ............................................ 18 gen4-IoD-24T/28T/32T Page 2 of 22 www.4dsystems.com.au Table of Contents 22. Specifications ............................................................................................................. 19 23. Hardware Revision History .......................................................................................... 21 24. Datasheet Revision History ......................................................................................... 21 25. Legal Notice ................................................................................................................ 22 26. Contact Information ................................................................................................... 22 gen4-IoD-24T/28T/32T Page 3 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 1. Description 2. Features The gen4-IoD (Internet of Displays) series of is part of the latest gen4 Range of modules Designed and Manufactured by 4D Systems. * Powerful Intelligent LCD-TFT display module powered by the Espressif ESP8266 SoC. The gen4 series was designed specifically for ease of integration and use, with careful consideration for space requirements and functionality. This specific gen4 module features a 2.4", 2.8" or a 3.2" colour TFT LCD display, with Resistive Touch. It is powered by the WiFi enabled ESP8266, which offers an array of functionality and options for any Designer / Integrator / User. The gen4-IoD range can be easily programmed using 4D Systems Workshop4 or the Arduino IDE installed with the ESP8266 core. The feature rich 4D Systems GFX4d library enables speedy development of applications by providing extensive primitive graphics functions, enhanced graphics via Workshop4, SD card and touch routines, integrated into a single library. The on-board SD card socket enables the use of FAT16 or FAT32 formatted cards for extensive storage capabilities. * 320 x 240 Resolution, RGB 65K true to life colours, TFT Screen with integrated 4-wire Resistive Touch Panel. * Built in WiFi suitable for `Internet of things' applications. * 802.11 b/g/n/e/i support * Integrated TCP/IP protocol stack * WiFi 2.4 GHz, supporting WPA/WPA2 and WEP/TKIP/AES, along with STA/AP/STA+AP/P2P operation modes * 4Mbit (512kb) of Flash memory for User Application Code and Data. * 128Kb of SRAM of which 80kb is available for the User. * 10pin FPC connection, for all signals, power, communications and programming. * On-board latch type microSD memory card connector for multimedia storage and data logging purposes. * DOS compatible file access (FAT16 or FAT32 format). * Display full colour images, animations, and icons. The gen4-IoD series of Integrated Display Modules features a 10 pin ZIF socket, designed for a 10 pin FFC cable, for easy and simple connection to an application or mother board, or for connecting to accessory boards for a range of functionality advancements. The gen4 series of modules has been designed to minimise the impact of display related circuitry, and provide a platform suitable for integration into a product. Application boards can sit flush on the back of the gen4 if required, as the display related electronics sit inside the plastic mounting base, leaving the application board surface clear for User circuitry. More information on the Espressif ESP8266 SoC can be found on the Espressif website http://espressif.com, and from the ESP8266EX SoC datasheet itself: http://www.espressif.com/sites/default/files/docum entation/0a-esp8266ex_datasheet_en.pdf gen4-IoD-24T/28T/32T * 4.0V to 5.5V range operation (single supply). A 1Amp+ supply is highly recommended for stability. * Module dimensions: (2.4") 78.4 x 44.8 x 7.2mm. (2.8") 87.3 x 52.1 x 7.3mm. (3.2") 95.7 x 57.1 x 7.5mm. * Weighing: ~26 g (2.4"), ~36 g (2.8"), ~44 g (3.2"), * 4x mounting tabs with 3.2mm holes for mechanical mounting using M3 screws. * RoHS, REACH and CE compliant. NOTE: Arduino is a trademark of Arduino Team, and all references to the word "Arduino" or use of its logo/marks are strictly in reference to the Arduino product, and how this product is compatible with the aspect of the product but is not associated with the Arduino Team in anyway. ESP8266 / ESP8266EX are products made by Espressif. 4D Systems is not associated with Espressif in anyway, other than utilising their product inside of ours. Page 4 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 3. Hardware Overview 2.4", 2.8" or 3.2" TFT LCD with Resistive Touch Latch Type microSD Socket AR1021 Resistive Touch Controller USER I/O - 10 way ZIF Socket 0.5mm pitch Upper Contact 5.5mm wide FPC Cable ESP8266 SoC PIN 10 PIN 1 Ceramic chip antenna, and U.FL external antenna connector 4Mbit Flash Memory for the ESP8266 USER I/O - 10 Way FPC Pin Conditions I/O 1 2 GND GND P P 3 RESET I 4 GPIO0 I/O 5 RX I 6 TX O 7 GND P 8 GPIO16 I/O 9 10 5V IN 5V IN P P Description Supply Ground. Supply Ground. Master Reset signal. Internally pulled up to 3.3V via a 10K resistor. An active Low pulse greater than 2 micro-seconds will reset the module. If the module needs to be reset externally, only use open collector type circuits. This pin is not driven low by any internal conditions. The host should control this pin via one of its port pins using an open collector/drain arrangement. I/O pin. This pin is used for backlight control and flash programming Asynchronous Serial Receive pin, TTL level. Connect this pin to the Transmit (Tx) signal of other serial devices. Used in conjunction with the TX pin for programming this microLCD. This pin is tolerant up to 3.3V levels. Asynchronous Serial Transmit pin, TTL level. Connect this pin to the Receive (Rx) signal of other serial devices. Used in conjunction with the RX pin for programming this microLCD. This pin outputs 3.3V levels. Supply Ground. I/O pin. Can be used as digital input or output. Can also be used for PWM and 1-wire device interfacing. This pin is available to the user. This pin is tolerant up to 3.3v levels. Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V. Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V. I = Input, O = Output, P = Power gen4-IoD-24T/28T/32T Page 5 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 4. Hardware Interface - Pins 4.2. System Pins This section describes in detail the hardware interface pins of the device. +5V IN (Module Voltage Input) Module supply voltage input pins. Both of these pins should be connected to a stable supply voltage in the range of 4.0 Volts to 5.5 Volts DC. Nominal operating voltage is 5.0 Volts. Note backlight brightness will be dimmer for voltages under 5.0V. 4.1. Serial Ports - TTL Level Serial The ESP8266 Processor has a hardware asynchronous serial ports that can be accessed via the 10 way FPC or via the gen4-Iod-programmer. The serial port can be used to communicate with external serial devices. GND (Module Ground) Device ground pins. Both pins should be connected to ground. The primary features are: Full-Duplex 8 bit data transmission and reception. RESET (Module Master Reset) Module Master Reset pin. An active low pulse of greater than 2s will reset the module. Internally pulled up to 3.3V via a 10K resistor. Only use open collector type circuits to reset the device if an external reset is required. Data format: 8 bits, No Parity, 1 Stop bit. Independent Baud rates from 300 baud up to 921600 baud. Single byte transmits and receives or a fully buffered service. The buffered service feature runs in the background capturing and buffering serial data without the user application having to constantly poll any of the serial ports. This frees up the application to service other tasks. A single byte serial transmission consists of the start bit, 8-bits of data followed by the stop bit. The start bit is always 0, while a stop bit is always 1. The LSB (Least Significant Bit, Bit 0) is sent out first following the start bit. Figure below shows a single byte transmission timing diagram. GPIO0 (Backlight/Flash) This pin is dedicated to both backlight control and the Flashing of the IoD program memory via the programming software. This pin must be left floating at power-up to enable the ESP8266 to boot correctly. If GPIO0 is set to be an input in User code once the ESP8266 has booted, then this pin could be controlled externally to adjust backlight brightness using PWM or simple on/off control. Else, the backlight can be controlled from the ESP8266 itself, with appropriate User code. GPIO16 (User GPIO) Input/Output available to the user. This pin can be used as a digital input or digital output to connect to sensors, relays etc. This pin can also be used for `1wire' protocol devices and as a PWM output. 4.3. SPI - (Used internally) The serial port is also the primary interface for User program downloads, and configuration via the IDE. There is 1 hardware SPI channel (HWSPI) which is dedicated to drive the screen, SD card and Resistive Touch. The SPI channel can communicate at speeds up to 80Mhz. The SPI channel is Master only, and cannot be configured to be slave at this time, nor is it available for the User externally. Note: The SPI channel (HWSPI) is dedicated to memory card, screen and touch controller. The HWSPI channel cannot be reconfigured for alternate uses. gen4-IoD-24T/28T/32T Page 6 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 5. ESP8266 SoC 8. Application PCB Support The module is designed around the ESP8266 SoC from Espressif. The gen4-IoD Display Module Series is designed to accommodate a range of applications, and therefore is suited for those wanting to make a customised module, without the need for piggy-back or daughter boards mounted on headers. The ESP8266 is a 32bit RISC Microcontroller with built in WiFi controller, and GPIO capability, however most GPIO are utilised for on board features, such as the TFT LCD, Touch Controller and microSD card. The TFT-LCD display interfaces to the ESP8266 using SPI, along with the microSD card and touch controller. This enables high speed transfers for these peripherals, providing fast graphics, fast SD card access and responsive touch control. Powerful graphics, text, image, animation, internet access and countless more features are available to the user via the 4D Systems GFX4d library and 4D Systems Workshop 4 IDE. Alternatively, the Arduino IDE can be used, and the User is able to write drivers/software for the module as they require. On the back of the gen4 module, the display related circuitry will be found, which is recessed into the plastic. The level of the plastic on the back of the gen4 module is higher than the tallest component on the display circuit PCB, meaning an Application PCB can be mounted on the back of the gen4, without affecting the display related circuitry. An application board can be made it fit inside the corner notches of the gen4 plastics. 6. SD/SDHC Memory Cards The gen4-IoD module supports microSD memory cards via the on-board latch type micro-SD connector. The memory card is used for all multimedia file retrieval such as images, animations and data files. The memory card can also be used as general purpose storage for data logging applications. Pictured: gen4-IoD-24T Support is available for off-the-shelf high capacity HC memory cards (4GB and above). Memory cards up to 32GB is size can be used, as FAT16 or FAT32, however it must be noted that only a portion of this can be utilised by the FAT16 file system. 7. FCC Cable The Standard FFC cable supplied has the following specifications: 10 Pin Flexible Flat Cable, 150mm Long, 0.5mm (0.02") pitch Cable Type: AWM 20624 80C 60V VW-1 Heat Resistance 80 Degrees Celsius Connections on the opposite side at each end (Type B) gen4-IoD-24T/28T/32T The 10 way FFC flex cable can come out of the gen4 display module and into the application board, either by coming up through a slot in the Users application board, or by travelling along the channel in the gen4 plastic's and emerging at the edge of the display module then curving around into the Users application board. The microSD socket is a latch type, so it is accessible from the top, rather than a push/push or push/pull style which is accessible from the side. A slot can be routed in the Users application board so this is accessible, if required. If an external antenna is being used, the antenna can also run down the plastic channel next to the 10 way FFC cable, not affecting the Users Application Board, if fitted. Page 7 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 9. Display/Module Precautions 10. Hardware Tools The following hardware tools are required for full control of the gen4 IoD Display Modules. Avoid having to display the same image/object on the screen for lengthy periods of time. This can cause a burn-in which is a common problem with all types of display technologies. Blank the screen after a while or dim it very low by adjusting the contrast. Better still; implement a screen saver feature. Moisture and water can damage the display. Moisture on the surface of a powered display should not cause any problems, however if water is to enter the display either from the front or from the rear, or come in contact with the PCB, damage will certainly occur. Wipe off any moisture gently or let the display dry before usage. If using this display module in an environment where it can get wet, ensure an appropriate enclosure is used. Dirt from fingerprint oil and fat can easily stain the surface of the display. Gently wipe off any stains with a soft lint-free cloth. The performance of the display will degrade under high temperature and humidity. Avoid such conditions when storing. Do not tamper with the display flex cable that is connected to the control board. This may affect the connection between the display and the driving circuitry and cause failure. Displays are susceptible to mechanical shock and any force exerted on the module may result in deformed zebra stripes, a cracked display cell and broken backlight Always use the mounting holes on the module's corner plates to mount the display where possible. Display modules have a finite life, which is typically dictated by the display itself, more specifically the backlight. The backlight contains LED's, which fade over time. In the Specifications section is a figure for the typical life of the display, and the criteria are listed. Resistive Touch model features a touch sensitive film over the display which is sensitive to pressure. Take note when mounting the display module in an enclosure that pressure is not applied to the surface of the display by the enclosure, or false touches will occur, or the touch will simply not function at all. gen4-IoD-24T/28T/32T 10.1. Programming Adaptor The 4D Systems Universal Programming Adaptor (4DUPA) is an essential hardware tool to program, customise and test the gen4-IoD Display Module. The 4D - UPA is used to program the IoD via Workshop4 and the Arduino IDE. It even serves as an interface for communicating serial data to the PC. The 4D - UPA is available from 4D Systems website, www.4dsystems.com.au Please note, the 4D-UPA can be used as a simple interface to power the IoD or to connect to other serial devices. The 4D - UPA features an Auto-Reset circuit (credit - NodeMCU), but also features Reset and Flash buttons, for flexibility. Alternatively, other programming devices could be used, including programming from a host controller. Please refer to the ESP8266 datasheet for more options on programming this SoC. Page 8 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 11. Internal / External Antenna 12. FCC Cable Orientation The gen4-IoD is capable of using either the on-board ceramic chip antenna, or using an external antenna connecting using the U.FL connector on the PCB. The 10-way FFC cable connects to the gen4-IoD and the 4D-UPA, the same way. Both feature Bottom Contact FFC connectors, meaning the FFC cable connects into the board with the contacts facing down, blue side facing up. By default, the on-board ceramic chip antenna is used, and SB2 (Solder Bridge 2) is shorted, enabling contact of the LBA pin to the ceramic chip antenna. If the external antenna is desired instead, SB1 (Solder Bridge 1) needs to be shorted, using a small blob of solder via a soldering iron, and SB2 needs to be desoldered. SB2 `can' be left connected if required, however WiFi performance may be impeded to some degree, due to two antennas being connected at the same time, however it should still work in most situations. gen4-IoD-24T/28T/32T Page 9 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 13. Programming the IoD There are two IDE's available to program the IoD. Using the Arduino IDE, or using the 4D Systems Workshop4 IDE. Using the Workshop4 IDE provides additional graphical benefits over using the Arduino IDE, however the Worskhop4 IDE is only Windows based (unless via a Virtual Machine). If using the Workshop4 IDE, Workshop4 installation will call the Arduino IDE in the background for programming the board (handled automatically and invisibly). Some minor setup is required to install the board into the Arduino IDE, using the Board Manager and installing the JSON file. See the following section. Once it loads, scroll down to the bottom, and you should see a listing for esp8266. Click on it, and then on install, and install the latest version. If the Workshop4 IDE is not going to be used at all, then the IoD board needs to be added into the Arduino IDE in the same way, using the Arduino Board Manager. More details below. Once this has been completed, click Close, and then shut down the Arduino IDE. 13.1. Arduino IDE NOTE: For advanced users, the Github repository for the Arduino esp8266 core (non-stable version), is not classed as being stable by Espressif. Use at your own risk. The gen4-IoD is Arduino IDE compatible. The IoD can be directly programmed via Arduino IDE like any other ESP8266/Arduino module. The Arduino IDE should then be set up to start using the gen4-IoD. https://github.com/esp8266/Arduino The gen4-IoD must be added to the Arduino IDE. This is typically done using the Boards Manager. Advanced users who wish to use the Github main repository are welcome to, which also supports the gen4-IoD, however is not classed as Stable by the ESP8266 community so should be used with caution. The easiest way to install the gen4-IoD into the Arduino IDE, is by installing the Stable release JSON file provided by the ESP8266 community. This is done by starting up the Arduino IDE, going File, Preferences, and entering the following line into the `Additional Boards Manager URLs' field. If you already have a listing in there, simply add a comma after the last one, and paste this new URL in at the end: http://arduino.esp8266.com/stable/packa ge_esp8266com_index.json Click OK on the preferences window to close it. Go up to Tools, Board, and click on Board Manager. Follow the instructions on their Github readme. NOTE: The ESP8266 Core is not maintained or created by 4D Systems. It belongs to esp8266.com 13.2. Additional Libraries Check out the GFX4d library from the 4D Systems github page: https://github.com/4dsystems This contains the library specifically for the gen4-IoD and some demo applications. This library can be downloaded and added to the Arduino IDE, like any normal library. Navigate to https://github.com/4dsystems/GFX4d and download the repository, using the download/clone button. Save the zip file to your PC. Open the Arduino IDE, and go to Sketch - Include Library - Add Zip Library gen4-IoD-24T/28T/32T Page 10 of 22 www.4dsystems.com.au gen4-Internet of Displays Series The library will then be installed, and will be available for you to use. There are example applications available in the examples folder. 13.3. 4D Systems - Workshop 4 IDE Workshop 4 is a comprehensive software IDE that provides an integrated software development platform for all 4D Systems Intelligent Display Modules, including the IoD. Note: Workshop requires the Arduino IDE to be installed as Workshop calls the Arduino IDE for compiling the Arduino sketches. The Arduino IDE however is not required to be opened or modified to program the gen4-IoD, once it has been set up. Please follow the steps found in the previous section to install and add the gen4-IoD to the Arduino IDE, prior to installing the Workshop4 IDE. Workshop4 allows rapid development of applications, and on the gen4- IoD can take full advantage of the available extended graphics functions. The Workshop IDE can create/edit Arduino code and verify/compile and then load the code into the IoD's ESP8266 processor, without having to use the Arduino IDE directly. It makes it possible to create both simple and complex graphical user interfaces. When Workshop4 is started, it presents the User with a screen to start a new project, or to load a project. Upon selecting to start a new project, another screen is displayed, presenting the wide range of 4D Systems products available to be programmed or configured by the Workshop4 IDE, of which there is the gen4-IoD24T, gen4-IoD-28T and gen4-IoD-32T. The Workshop4 IDE can be used to program the gen4IoD, just as the Arduino IDE does. This is possible due to the integration of the Arduino compiler via the Arduino IDE, which allows Arduino sketches to be written and compiled from within the Workshop4 IDE, which then provides WS4 the benefit of adding graphical widgets and features to the gen4-IoD, which would otherwise not be available when using the Arduino IDE. If you use the Workshop4 IDE, you can program the gen4-IoD module and have the opportunity to create graphics which you can call using Arduino code via the GFX4d library. Many options are possible. gen4-IoD-24T/28T/32T Page 11 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 14. Starter Kit 15. Display Module Numbers 4D Systems highly recommends all first-time buyers of 4D Systems' displays, to purchase the Starter Kit when purchasing their first 4D Systems display solution. The following is a breakdown on the part numbers and what they mean. The Starter Kit provides all the hardware that is required to get the User up and running. Not all development environments and features will be needed by every User. However, by purchasing the display solution in a Starter Kit allows you to take full advantage of all of the features of the 4D Systems Display Solution and try out each of the 4D Woskshop4 Environments prior to settling with the preferred feature-set. Starter Kits typically include: gen4 IoD Display Module 4D-UPA 150mm 10-way FFC cable for connecting gen4 display to 4D - UPA 4GB micro-SD Card Example: gen4-IoD-24T gen4-IoD-28T gen4-IoD-32T gen4 IoD 24 28 32 T - gen4 Display Family - IoD (Internet of Displays) Range - Display size (2.4") - Display size (2.8") - Display size (3.2") - Resistive Touch Please refer to the 4D Systems website for current components included in the Starter Kit, if available. Simply select the Starter Kit option when purchasing the chosen display module on the 4D Systems shopping cart, or from your local distributor. gen4-IoD-24T/28T/32T Page 12 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 16. Mechanical Details - gen4-IoD 2.4'' gen4-IoD-24T/28T/32T Page 13 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 17. Mechanical Details - gen4-IoD 2.8'' gen4-IoD-24T/28T/32T Page 14 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 18. Mechanical Details - gen4-IoD 3.2 gen4-IoD-24T/28T/32T Page 15 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 19. Mechanical Details - 4D - Universal Programming Adaptor gen4-IoD-24T/28T/32T Page 16 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 20. Schematic Details - gen4-IoD Display gen4-IoD-24T/28T/32T Page 17 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 21. Schematic Details - 4D - Universal Programming Adaptor gen4-IoD-24T/28T/32T Page 18 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 22. Specifications ABSOLUTE MAXIMUM RATINGS Operating ambient temperature ................................................................................................... -20C to +70C Storage temperature .......................................................................................................................... -30C +80C Voltage on any digital input pin with respect to GND ....................................................................... -0.3V to 6.0V Voltage on VCC with respect to GND ................................................................................................. -0.3V to 6.0V Maximum current sunk/sourced by any pin .............................................................................................. 12.0mA NOTE: Stresses above those listed here may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the recommended operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Operating ambient temperature ................................................................................................... -20C to +70C RECOMMENDED OPERATING CONDITIONS Parameter Conditions Supply Voltage (VCC) Operating Temperature Stable external supply required Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage 3.3V, all pins GPIO0, GPIO16, and RX Pins Min Typ Max Units 4.0 -10 5.0 -- 5.5 +60 V C -0.3 0.7VCC -0.8VCC ----- 0.25VCC 3.3 0.1VCC -- V V V V GLOBAL CHARACTERISTICS BASED ON OPERATING CONDITIONS Parameter Supply Current (ICC) Display Endurance Touch Screen Endurance (Resistive Touch) Touch Screen Transparency Touch Screen Operational Force (Resistive Touch) gen4-IoD-24T/28T/32T Conditions Min Typ Max Units gen4-IoD-24T - Average, not Peak -- 200 -- mA gen4-IoD-28T - Average, not Peak -- 200 -- mA gen4-IoD-32T - Average, not Peak Hours of operation, measured to when display is 50% original brightness Number of touches/hits with a 12.5mm tip at a rate of 2x per second with 250gf force Slide stylus on screen, 100gf force, 60mm/s speed with a 0.8mm polyacetal tip stylus pen Resistive Touch Only use Finger or Stylus, do not use anything sharp or metal -- 220 -- mA 30000 -- -- H -- 1M -- Touches -- 100K -- Slides 82 -- -- % 20 -- 100 Gf Page 19 of 22 www.4dsystems.com.au gen4-Internet of Displays Series LCD DISPLAY INFORMATION Parameter Conditions Display Type Display Size TFT Transmissive LCD gen4-IoD-24T 2.4" Diagonal gen4-IoD-28T 2.8" Diagonal gen4-IoD-32T 3.2" Diagonal Display Resolution Display Brightness Display Contrast Ratio Display Viewing Angles 240 x 320 (Portrait Viewing) gen4-IoD-24T 182 cd/m2 gen4-IoD-28T 140 cd/m2 gen4-IoD-32T 160 cd/m2 Typical (2.4", 2.8") 250:1 Typical (3.2") Above Centre Below Centre Left of Centre Right of Centre 500:1 35 Degrees 55 Degrees 55 Degrees 55 Degrees 6 o'clock Display (Optimal viewing is from below when in Portrait mode) 1x4 Parallel LED's 1x4 Parallel LED's 1x6 Parallel LED's 0.153 x 0.153mm (Square pixels) 0.18 x 0.18mm (Square pixels) 0.2025 x 0.2025mm (Square pixels) 166 DPI/PPI 141 DPI/PPI 127 DPI/PPI Display Viewing Direction Display Backlighting Pixel Pitch Pixel Density gen4-IoD-24T/28T/32T Specification gen4-IoD-24T gen4-IoD-28T gen4-IoD-32T gen4-IoD-24T gen4-IoD-28T gen4-IoD-32T Number of pixels in 1 row in 25.4mm Page 20 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 23. Hardware Revision History Revision Number Date 1.4 29/03/2017 Description Initial Public Release Version 24. Datasheet Revision History Revision Number Date 1.0 1.1 1.2 12/06/2017 28/02/2019 05/03/2019 gen4-IoD-24T/28T/32T Description Initial Public Release Format Change, Arduino Instruction update Cosmetic Changes to gen4 Datasheet range Page 21 of 22 www.4dsystems.com.au gen4-Internet of Displays Series 25. Legal Notice Proprietary Information The information contained in this document is the property of 4D Systems Pty. Ltd. and may be the subject of patents pending or granted, and must not be copied or disclosed without prior written permission. 4D Systems endeavours to ensure that the information in this document is correct and fairly stated but does not accept liability for any error or omission. The development of 4D Systems products and services is continuous and published information may not be up to date. It is important to check the current position with 4D Systems. 4D Systems reserves the right to modify, update or makes changes to Specifications or written material without prior notice at any time. All trademarks belong to their respective owners and are recognised and acknowledged. Disclaimer of Warranties & Limitation of Liability 4D Systems makes no warranty, either expressed or implied with respect to any product, and specifically disclaims all other warranties, including, without limitation, warranties for merchantability, non-infringement and fitness for any particular purpose. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. Images and graphics used throughout this document are for illustrative purposes only. All images and graphics used are possible to be displayed on the 4D Systems range of products, however the quality may vary. In no event shall 4D Systems be liable to the buyer or to any third party for any indirect, incidental, special, consequential, punitive or exemplary damages (including without limitation lost profits, lost savings, or loss of business opportunity) arising out of or relating to any product or service provided or to be provided by 4D Systems, or the use or inability to use the same, even if 4D Systems has been advised of the possibility of such damages. 4D Systems products are not fault tolerant nor designed, manufactured or intended for use or resale as on line control equipment in hazardous environments requiring fail - safe performance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life support machines or weapons systems in which the failure of the product could lead directly to death, personal injury or severe physical or environmental damage (`High Risk Activities'). 4D Systems and its suppliers specifically disclaim any expressed or implied warranty of fitness for High Risk Activities. Use of 4D Systems' products and devices in 'High Risk Activities' and in any other application is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless 4D Systems from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any 4D Systems intellectual property rights. 26. Contact Information For Technical Support: www.4dsystems.com.au/support For Sales Support: sales@4dsystems.com.au Website: www.4dsystems.com.au Copyright 4D Systems Pty. Ltd. 2000-2019. gen4-IoD-24T/28T/32T Page 22 of 22 www.4dsystems.com.au