4D systems Internet of Displays Series User manual

Uncontrolled Copy when printed or downloaded.
Please refer to the 4D Systems website for the latest Revision of this document
www.4dsystems.com.au
DATASHEET
Internet of Displays Series
IoD-09TH 0.9” Through Hole version
IoD-09SM 0.9” Surface Mount version
Document Date: 6th April 2018
Document Revision: 1.2

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 2 of 22 www.4dsystems.com.au
Contents
Description...................................................................................................................4
Features .......................................................................................................................4
Hardware Overview (IoD-09TH) ....................................................................................5
Hardware Overview (IoD-09SM)....................................................................................6
Hardware Description...................................................................................................7
Mounting the Hardware ................................................................................................7
Hardware Interface - Pins..............................................................................................8
Serial Port –TTL Level Serial ..........................................................................................8
System Pins....................................................................................................................8
SPI ..................................................................................................................................9
I2C..................................................................................................................................9
1–Wire ...........................................................................................................................9
ESP8266 SoC.................................................................................................................9
SD/SDHC Memory Cards ...............................................................................................9
Display/Module Precautions .......................................................................................10
Hardware Tools ..........................................................................................................10
4D-UPA Universal Programmer .....................................................................................10
Programming the IoD..................................................................................................11
Arduino IDE....................................................................................................................11
4D Systems - Workshop 4 IDE........................................................................................12
Starter Kit...................................................................................................................13
Display Module Part Numbers.....................................................................................13
Mechanical Details –IoD-09-TH...................................................................................14
Mechanical Details –IoD-09-SM..................................................................................15
Mechanical Details –4D-UPA Programmer ..................................................................16
Schematic Details –IoD-09 Display Module .................................................................17
Schematic Details –4D-UPA Programming Module......................................................18
Specifications .............................................................................................................19

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 3 of 22 www.4dsystems.com.au
Hardware Revision History..........................................................................................21
Datasheet Revision History .........................................................................................21
Legal Notice................................................................................................................22
Contact Information ...................................................................................................22

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 4 of 22 www.4dsystems.com.au
Description
The IoD-09 (Internet of Displays) series is a range of
miniature display modules Designed and
Manufactured by 4D Systems.
The IoD-09 modules features a full colour 0.9”TFT LCD
display. They are powered by the WiFi enabled
ESP8266, which offers an array of functionality and
options for any Designer / Integrator / User.
The IoD-09 modules can be easily programmed using
4D Systems Workshop4 or the Arduino IDE installed
with the ESP8266 core.
The feature rich 4D Systems GFX4dIoD09 library
enables speedy development of applications by
providing extensive primitive graphics functions,
enhanced graphics via Workshop4, SD card access,
and much more, all integrated into a single library.
The on-board SD card socket enables the use of FAT16
or FAT32 formatted cards for extensive storage
capabilities.
The IoD-09 modules feature 12 pads, 6 on each end,
for easy and simple connection to an application or
mother board, or for connecting to accessory boards
for a range of functionality advancements. The IoD-
09TH features Through Hole (TH) pads with male pin
headers mounted, and the IoD-09SM features Surface
Mount (SM) pads.
This range of modules has been designed to minimise
the impact of display related circuitry, and provide a
platform suitable for integration into a product.
The IoD-09 modules can act as master or slave devices,
they can be effortless connected to the internet, can
display a raft information and graphics, along with the
capability to communicate to SPI, I2C, and/or 1-wire
devices, as well as having general GPIO for digital
control/input.
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
NOTE: The IoD-09TH module is recommended for all
applications, whereas the IoD-09SM module is
designed for integrators, due to the nature of its
Surface Mount pads. The IoD-09TH is easily
programmed with the 4D-UPA, and should be the
module of choice for most applications.
Features
•Powerful Intelligent LCD-TFT display module
powered by the Espressif ESP8266 SoC.
•80 x 160 Resolution, full colour TFT Screen
•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.
•12pin/pad connection, for all signals, power,
communications and programming.
•On-board push/pull 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.
•4.0V to 5.5V range operation (single supply). A
1Amp+ supply is highly recommended for stability.
•Module dimensions:
(TH version) 31.8 x 16.4 x 11.7mm.
(SM version) 37.0 x 16.4 x 5.9mm.
•Weighing: ~5 g (TH), ~5 g (SM)
•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.

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 5 of 22 www.4dsystems.com.au
Hardware Overview (IoD-09TH)
I = Input, O = Output, P = Power
PINOUT
Pin
Symbol
I/O
Description
1
GND
P
Supply Ground.
2
RX
I
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 module. This pin is tolerant up to 3.3V levels.
3
TX
O
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 module. This pin outputs 3.3V levels.
4
RESET
I
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.
5
5V
P
Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V.
6
GND
P
Supply Ground.
7
GPIO16
I/O
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.
8
GPIO12
I/O
This pin is the MISO pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
9
GPIO14
I/O
This pin is the SCK pin used on the SPI Bus. This pin is tolerant up to 3.3v levels.
10
GPIO0
I/O
I/O pin. This pin is also used for flash programming. This pin is tolerant up to
3.3v levels. This pin can be used for I2C communications. NOTE: Special Pin
11
GPIO13
I/O
This pin is the MOSI pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
12
GPIO2
I/O
I/O pin. This pin is also used for boot selection. This pin is tolerant up to 3.3v
levels. This pin can be used for I2C communications. NOTE: Special Pin.
microSD Socket
USER I/O –2x 6way headers
2.54mm (0.1”) pitch
Ceramic chip antenna
4Mbit Flash
Memory for the
ESP8266
ESP8266 SoC
0.9” TFT LCD
Pin 1

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 6 of 22 www.4dsystems.com.au
Hardware Overview (IoD-09SM)
I = Input, O = Output, P = Power
PINOUT
Pin
Symbol
I/O
Description
1
GND
P
Supply Ground.
2
RX
I
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 module. This pin is tolerant up to 3.3V levels.
3
TX
O
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 module. This pin outputs 3.3V levels.
4
RESET
I
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.
5
5V
P
Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V.
6
GND
P
Supply Ground.
7
GPIO16
I/O
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.
8
GPIO12
I/O
This pin is the MISO pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
9
GPIO14
I/O
This pin is the SCK pin used on the SPI Bus. This pin is tolerant up to 3.3v levels.
10
GPIO0
I/O
I/O pin. This pin is also used for flash programming. This pin is tolerant up to
3.3v levels. This pin can be used for I2C communications. NOTE: Special Pin
11
GPIO13
I/O
This pin is the MOSI pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
12
GPIO2
I/O
I/O pin. This pin is also used for boot selection. This pin is tolerant up to 3.3v
levels. This pin can be used for I2C communications. NOTE: Special Pin.
microSD Socket
USER I/O –2x 6way castellated
headers, 2.54mm (0.1”) pitch
Ceramic chip antenna
4Mbit Flash
Memory for the
ESP8266
ESP8266 SoC
0.9” TFT LCD
Pin 1

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 7 of 22 www.4dsystems.com.au
Hardware Description
The IoD-09TH is a Through Hole design which features
DIP style male pin headers, designed to plug into
female connectors, onto jumper wires/harnesses, into
a breadboard for testing, or directly into PCB holes and
soldered in place.
The IoD-09SM is a Surface Mount design, which
features castellated pads, which can be soldered to
wires or male pins, but are designed to be directly
connected to a host PCB, and soldered in place.
The IoD-09TH is designed to be programmed with the
4D-UPA programming adaptor, and simply plugs on
and off easily. The IoD-09SM cannot easily connect to
the 4D-UPA, as it has no pins. Wires can be soldered to
the IoD-09SM and then connected to the 4D-UPA
programmer, but the intent of the IoD-09SM is for
integration into a product, and programmed in place.
Mounting the Hardware
The IoD-09TH features male pins, which are at a
regular 0.1” (2.54mm) pitch spacing, and are designed
to plug into another PCB (headers or directly into pads)
for easy plug ’n play style mounting. The metal casing
features shaped ‘feet’, allowing the module to sit
down onto a surface, giving the rear electronics space.
A hole can be formed in the host PCB, to give access to
the electronics, if direct mounting to PCB pads is
selected.
The IoD-09SM features surface mount castellated
pads, and is designed to be soldered in place onto a
host PCB. This module can be mounted on a PCB in 2
main ways.
A hole the size of the front of the metal frame could
be formed in the product, and the IoD-09SM placed
through the hole, and the surface mount pads being
soldered to the back. Illustrated below.
A hole the size of the rear of the module, with enough
clearance for the electronics, be formed in the
product, and the IoD-SM sits in the hold with the
surface mount pads being soldered from the front, and
its electronics accessed through the hole.

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 8 of 22 www.4dsystems.com.au
Hardware Interface - Pins
This section describes in detail the hardware interface
pins of the device.
Serial Port –TTL Level Serial
The ESP8266 Processor has a hardware asynchronous
serial ports that can be accessed via the headers on
the IoD-09 module. The serial port can be used to
communicate with external serial devices.
The primary features are:
•Full-Duplex 8 bit data transmission and reception.
•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.
The serial port is also the primary interface for User
program downloads, and configuration via the IDE.
System Pins
+5V (Module Voltage Input)
Module supply voltage input pins. This pin 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.
GND (Module Ground)
Device ground pins. Both pins should be connected to
ground.
RESET (Module Master Reset)
Module Master Reset pin. An active low pulse of
greater than 2μs 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.
GPIO0 (Flash Programming)
This pin is primarily used for the Flashing of the
ESP8266’s Flash Memory via the programming
software. This pin must be left floating at power-up to
enable the ESP8266 to boot correctly. Once the
module has booted, this pin is freely available to be
used for I2C or GPIO operations.
GPIO2 (Flash Mode)
This pin is primarily used to tell the ESP8266 which
mode it needs to be in, and to load from Flash
Memory. This pin must be left floating at power-up to
enable the ESP8266 to boot correctly. Once the
module has booted, this pin is freely available to be
used for I2C or GPIO operations.
GPIO12 (MISO)
This pin is the MISO SPI pin, which is used for the
Display, the microSD card, and is also available for the
User to connection additional SPI devices to the bus. It
is used in conjunction with the other SPI pins, and
requires GPIO0, GPIO2 or GPIO16 for the Chip Select
for any additional devices.
GPIO13 (MOSI)
This pin is the MOSI SPI pin, which is used for the
Display, the microSD card, and is also available for the
User to connection additional SPI devices to the bus. It
is used in conjunction with the other SPI pins, and
requires GPIO0, GPIO2 or GPIO16 for the Chip Select
for any additional devices.
GPIO14 (SCK)
This pin is the SCK SPI pin, which is used for the Display,
the microSD card, and is also available for the User to
connection additional SPI devices to the bus. It is used
in conjunction with the other SPI pins, and requires

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 9 of 22 www.4dsystems.com.au
GPIO0, GPIO2 or GPIO16 for the Chip Select for any
additional devices.
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 ‘1-
wire’ protocol devices and as a PWM output, or it can
be used as the Chip Select for the SPI bus.
SPI
There is 1 hardware SPI channel (HWSPI) which is used
to drive the screen, and the SD card. The SPI channel
is capable to communicate at speeds up to 80Mhz. The
SPI channel is Master only, and can be used by the
User for additional SPI devices, however is shared with
the Display and the SD Card. An additional GPIO is
required for each additional SPI device to be added to
the bus, to act as Chip Select.
When communications to the Display are taking place,
the SPI bus must not exceed 39Mhz, due to this being
the maximum stable speed it can operate.
When communications to the SD card are taking place,
the SPI bus must not exceed 30Mhz, due to this being
the maximum stable speed it can operate. This may
need to be reduced further depending on the
capabilities of the SD card being used. This is
configurable in the GFX4dIoD09 library.
Note: The SPI channel (HWSPI) is dedicated to
memory card, and screen. The HWSPI channel cannot
be reconfigured for alternate uses, as Display and SD
card would then be inoperable.
I2C
I2C is available on the IoD-09, using GPIO0 and GPIO2.
Take note however that these pins must be left to be
pulled high during startup, in order for the ESP8266 to
boot correctly. Pull up resistors are present on the IoD-
09 so it boots correctly, which is also required for I2C.
The IoD-09 is compatible with 100kbit/s and 400kbit/s
bus speeds, (higher may be possible, refer ESP8266
documentation).
The TX and RX serial UART pins on the IoD-09
(ESP8266) are also compatible with I2C, if these are
desired to be used instead. No pull-up resistors are
built in to the IoD-09 for these pins.
1–Wire
1-Wire communications are available on GPIO0, GPIO2
or GPIO16, for communicating with Delas 1-wire
compatible devices. A library for the IoD-09 has been
created to aid using this communication bus type.
ESP8266 SoC
The module is designed around the ESP8266 SoC from
Espressif.
The ESP8266 is a 32bit RISC Microcontroller with built
in WiFi controller, and GPIO capability, however some
GPIO are utilised for on board features, such as the TFT
LCD and microSD card.
The TFT-LCD display interfaces to the ESP8266 using
SPI, along with the microSD card. This enables high
speed transfers for these peripherals, providing fast
graphics and fast SD card access.
Powerful graphics, text, image, animation, internet
access and countless more features are available to
the user via the 4D Systems GFX4dIoD09 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.
SD/SDHC Memory Cards
The IoD-09 module supports microSD memory cards
via the on-board 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.
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.

IoD Display Module Series IoD-09TH/SM
©2017 4D SYSTEMS Page 10 of 22 www.4dsystems.com.au
Display/Module Precautions
•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. Implement a
screen saver feature if possible, to prevent this
from occurring, or considerably slow the process.
LCD’s suffer considerably less than OLED displays,
however it is still recommended to implement a
screen saver if possible.
•Moisture and water can damage the display. 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 elevated temperature and humidity. Avoid
such conditions when storing.
•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
•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.
Hardware Tools
The following hardware tools are required for full
control of the IoD-09 Display Modules.
4D-UPA Universal Programmer
The 4D Systems 4D-UPA is an essential hardware tool
to program, customise and test the IoD-09TH Display
Module. It is not plug-and-play compatible with the
IoD-09SM Display Module due to the nature of how
the Surface Mount version attaches, however it could
be wired up to program the IoD-09SM if required.
The 4D-UPA is used to program the IoD-09TH via
Workshop 4 and/or 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-09 or to connect to other
devices.
The 4D-UPA programmer 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.