teensy fast tft display price

I refer to the TFT, there are some that have a chip dedicated to pixel management, it is generally incorporated into the PCB in addition to the screen"s controller chip itself. The advantage is that you can implement complex graphical environments, which take the burden off the MCU.

These screens are called HMI, there are several that could potentially be used in the teensy 4 or teensy 4.1, however you have to work in the libraries, since almost all of them are focused on AVR or ARM-STM32 or have their own environment programming, which has nothing to do with the arduino IDE.

Other examples are: TFT SmartGPU 2, which implement the graphics controller with a STM32F103 chip, or the 4DSystems Diablo or Picasso graphics chip, Nextion TFT, Stone TFT, etc. They are not cheap TFTs, and I have not seen at the moment any with the resolution you are looking for.

CC3000 is troublesome, partly because it uses SPI_MODE1, partly because it uses the SPI port from within an interrupt. Adafruit’s CC3000 library has code to backup the AVR’s SPI registers, change them to MODE1, and then restore when it’s done, so the conflicting clock polarity isn’t (usually) an issue on AVR. But on Due, Teensy 3.1 and all other non-AVR chips, their specific SPI registers aren’t also in the code, so you can pretty easily end up with the SPI port left in the wrong mode.

Interrupts are also a huge problem. Using the CC3000 in simple blocking ways, where you fully complete all communication before you try to write to the display or read the touch screen or access the SD card tends to work. But if you use another device while the CC3000 generates an interrupt at just the wrong moment, it can run its SPI code while another device has chip select asserted, causing all sorts of terribly wrong results.

The touch controller on Adafruit’s displays comes in a couple different types, which need different SPI data modes, and some require very slow clock speeds. Again, they have AVR-only register save/restore, so usually you don’t get wrong settings into other libraries, but there’s no hardware specific code in those libs for non-AVR chips.

My recent work on SPI transactions, which will be in Teensyduino 1.20 (already in the latest release candidate and on github) and is planned for Arduino 1.5.8 (already in their github source and nightly builds) aims to solve both the settings and interrupt problems, in a hardware independent way. Adafruit has already merged my patches to their libs, at least for these most common ones, so they use the new SPI transaction stuff when compiled on those new versions.

Paul Stoffregen did it again: the Teensy 4.0 has been released. The latest in the Teensy microcontroller development board line, the 4.0 returns to the smaller form-factor last seen with the 3.2, as opposed to the larger 3.5 and 3.6 boards.

Don’t let the smaller size fool you; the 4.0 is based on an ARM Cortex M7 running at 600 MHz (!), the fastest microcontroller you can get in 2019, and testing on real-world examples shows it executing code more than five times faster than the Teensy 3.6, and fifteen times faster than the Teensy 3.2. Of course, the new board is also packed with periperals, including two 480 Mbps USB ports, 3 digital audio interfaces, 3 CAN busses, and multiple SPI/I2C/serial interfaces backed with integrated FIFOs. Programming? Easy: there’s an add-on to the Arduino IDE called Teensyduino that “just works”. And it rings up at an MSRP of just $19.95; a welcomed price point, but not unexpected for a microcontroller breakout board.

When doing hardware reviews it’s crucial to choose the right comparison hardware. I think the best comparison in this case is between the two boards that share the same form factor; the Teensy 4.0 and the 3.2. I’ve chosen not to make the comparison with the Teensy 3.5 and 3.6, which are priced a little higher, in a larger form factor, and have SD card slots soldered on.

The Cortex-M7 on this board also supports tightly-coupled memory (TCM), which provides fast access like a cache, but without the non-determinism that can complicate hard real-time applications — one of the problems with other high-power microcontrollers. The 64-bit ITCM bus can fetch 64-bits, while two dedicated 32-bit buses (DTCM) can fetch up to two instructions from the TCM each cycle – these buses are separate from the main AXI bus used to communicate with other memory and peripherals. The Teensyduino environment automatically allocates code and statically allocated memory into the DTCM area, which can be up to 512K in size, although you can override the default behavior with some command-line switches. Memory that isn’t accessed by the tightly-coupled buses is optimized for access by the peripherals using DMA.

To see how fast this thing really is, Paul ported the CoreMark embedded-processor benchmark to the Arduino environment. (Note that CoreMark seems to be a registered trademark of the Embedded Microprocessor Benchmark Consortium (EEMBC)). This synthetic benchmark tests performance managing linked lists, doing matrix multiplies, and executing state machine code. He reports the following scores for a number of boards (larger numbers are better).

I was able to verify the Teensy 4.0 and 3.2 numbers; my 3.6 must have sprouted legs and walked off somewhere, and I didn’t have any of the other boards handy for testing. Using my numbers (nearly identical to those above), the 4.0 is around ten times as fast as the 3.2.

One of the new features of the Teensy 4.0 is the automatic recovery process, which restores the board to a known good state without the need for a PC connection. If you press and hold the reset button for 15 seconds, the red LED will flash to indicate you’ve entered restore mode. Once you release the button, the red LED will illuminate while the flash memory is erased and re-written with the traditional Arduino “blink” program. Once the re-write is complete, the blink program is run and the orange LED begins blinking, just like on every Arduino-compatible for the past decade and a half. It’s DFU mode without the need for host computer or known-working binary. These used to be key components for hardware-based restore and now they’re part of the board itself.

Why would you want to do this? In a nutshell, because USB itself is a train-wreck. On top of an insanely sprawling and complex protocol, there are charge-only cables sans data pins lurking in your junk box, operating system bugs waiting to trip you up (looking at you, Windows 7), and a whole host of other issues that cause serious head-scratching when things stop working. This can be especially confusing with native-USB boards like the Teensy 4.0; while the built-in USB functionality is amazingly powerful, and can be used in a wide variety of ways, when something stops working, you’re not always sure how to get back on track. Now, you are – just press the button.

Paul envisions this Teensy 4.0 being used for polyphonic audio synthesis, running moderately complex machine learning algorithms, and real-time audio analysis. In many cases, the first level of processing on data-intensive input devices can now be moved from a host computer to the external microcontroller, narrowing the bandwidth required to the host system. And for projects driving a display, the built-in pixel processing pipeline can also accelerate graphics operations, offloading this work from the CPU.

This library supports ST7735 and ST7789 with and without a CS pin, such as https://www.amazon.com/gp/product/B07P9X3L7M/?pldnSite=1 which is a ST7789 240x240 display.

NOTE: If the Teensy has more than one SPI buss. And the IO pins are all on a different SPI buss then that buss will be used. (i.e. you can use SPI1 or SPI2). With this, on a board such as a T4 or T3.5 or T3.6 you can potentially have three displays all on different SPI busses and using the Async updates you can have all three of them updating their display at the same time.

The teensy 4.x, 3.6 and 3.5 have a lot more memory than previous Teensy processors, so on these boards, we borrowed some ideas from the ILI9341_t3DMA library and added code to be able to use a logical Frame Buffer.

Since the smaller ST7735 and maybe ST7789 displays have fewer pixels, you can on some of them enable a frame buffer on a T3.2 as well. I believe in this case I did add support for Async updates as well.

I sorry, the microSD with the ILI9341 nope at this moment. But with FT813 + gameduino library + SdFat_beta, work it surprisingly well in teensy 4. Later I share the library; It is work in process.

I have been working with a similar library: the ILI9488_t3. Until a few minutes ago, the XPT2046 touch chip did not work on the Teensy-4. The key is the file HW_ARM_defines.h inside of the path: URTouch\hardware\arm

For the teensy 4.1 you might be able using flexio block to build an alternate 16 bit mcu interface. That means the real frame buffer has to remain in the screen. It means that the lcd module you will buy needs to have an internal ram . Rgb 16/24 bits lcd with pclk cannot be used unless you build with flexio a real lcd pixel interface. There is an app note on nxp website about using flexio like that for kinetis cpus ( cpu is différent but flexio block is the same)

This 320x240 color TFT display is recommended for use with Teensy 3.2 to Teensy 4.1, for high resolution color graphics.It can be used with the Adafruit_ILI9341 library or Optimized ILI9341 library.

No! For about the price of a familiar 2x16 LCD, you get a high resolution TFT display. For as low as $4 (shipping included!), it"s possible to buy a small, sharp TFT screen that can be interfaced with an Arduino. Moreover, it can display not just text, but elaborate graphics. These have been manufactured in the tens of millions for cell phones and other gadgets and devices, and that is the reason they are so cheap now. This makes it feasible to reuse them to give our electronic projects colorful graphic displays.

There are quite a number of small cheap TFT displays available on eBay and elsewhere. But, how is it possible to determine which ones will work with an Arduino? And what then? Here is the procedure:ID the display. With luck, it will have identifying information printed on it. Otherwise, it may involve matching its appearance with a picture on Google images. Determine the display"s resolution and the driver chip.

Find out whether there is an Arduino driver available. Google is your friend here. Henning Karlsen"s UTFT library works with many displays. (http://www.rinkydinkelectronics.com/library.php?i...)

Load an example sketch into the Arduino IDE, and then upload it to the attached Arduino board with wired-up TFT display. With luck, you will see text and/or graphics.

We"ll begin with a simple one. The ILI9163 display has a resolution of 128 x 128 pixels. With 8 pins in a single row, it works fine with a standard Arduino UNO or with a Mega. The hardware hookup is simple -- only 8 connections total! The library put together by a smart fella, by the name of sumotoy, makes it possible to display text in multiple colors and to draw lines.

Note that these come in two varieties, red and black. The red ones may need a bit of tweaking to format the display correctly -- see the comments in the README.md file. The TFT_ILI9163C.h file might need to be edited.

It is 5-volt friendly, since there is a 74HC450 IC on the circuit board that functions as a level shifter. These can be obtained for just a few bucks on eBay and elsewhere, for example -- $3.56 delivered from China. It uses Henning Karlsen"s UTFT library, and it does a fine job with text and graphics. Note that due to the memory requirement of UTFT, this display will work with a standard UNO only with extensive tweaking -- it would be necessary to delete pretty much all the graphics in the sketch, and just stay with text.

on the far side of the display. It has 220x176 resolution (hires!) and will accept either 3.3 or 5 volts. It will work hooked up to an Uno, and with a few pin changes, also with a Mega. The 11-pin row is for activating the display itself, and the 5-pin row for the SD socket on its back.

This one is a 2.2" (diagonal) display with 176x220 resolution and parallel interface. It has a standard ("Intel 8080") parallel interface, and works in both 8-bit and 16-bit modes. It uses the S6D0164 driver in Henning Karlsen"s UTFT library, and because of the memory requirements of same, works only with an Arduino Mega or Due. It has an SD card slot on its back

This one is a bit of an oddball. It"s a clone of the more common HY-TFT240, and it has two rows of pins, set at right angles to one another. To enable the display in 8-bit mode, only the row of pins along the narrow edge is used. The other row is for the SD card socket on the back, and for 16-bit mode. To interface with an Arduino ( Mega or Due), it uses Henning Karlsen"s UTFT library, and the driver is ILI9325C. Its resolution is 320x240 (hires!) and it incorporates both a touch screen and an SD card slot.

Having determined that a particular TFT display will work with the Arduino, it"s time to think about a more permanent solution -- constructing hard-wired and soldered plug-in boards. To make things easier, start with a blank protoshield as a base, and add sockets for the TFT displays to plug into. Each socket row will have a corresponding row next to it, with each individual hole "twinned" to the adjacent hole in the adjoining row by solder bridges, making them accessible to jumpers to connect to appropriate Arduino pins. An alternative is hard-wiring the socket pins to the Arduino pins, which is neater but limits the versatility of the board.

In step 5, you mention that the TFT01 display can"t be used with the UTFT library on an Arduino Uno because of its memory requirements. It can - all you have to do is edit memorysaver.h and disable any display models you"re not using.

Not at all - it was your Instructable that got me going with the display to begin with! We all build off each other"s work, to the benefit of everyone.0

Tho I realize this is quickly becoming legacy hardware, these 8,16 bit parallel spi with 4 wire controller 3.2in Taft touch display 240x380. It has become very inexpensive with ally of back stock world wide so incorporating them into any project is easier then ever. Sorry to my question. I’m having difficulty finding wiring solution for this lcd. It is a sd1289 3.3 and 5v ,40 pin parallel 8,16 bit. I do not want to use a extra shield,hat or cape or adapter. But there’s a lot of conflicting info about required lvl shifters for this model any help or links to info would be great .. thank you. I hope I gave enough information to understand what I’m adoing

#1 you need a data sheet for the display and pinout and the i/o board attached to the cable.Than before you buy check for a driver for this chip Raydium/RM69071.if no driver lib are you able to write one and do you have the necessary tools to work on this scale to wire it up ..if you answer no than search for an arduino ready product.WCH0

Thanks for the wealth of knowledge! It is amazing at what is possible with items the average person can easily acquire. I hope to put some of your tips to use this winter as I would like to build sensors and other items for home automation and monitoring. Being able to have small displays around the house in addition to gathering and controlling things remotely will help the family see room conditions without going to the computer. The idea of a touchscreen control for cheap is mind blowing.

Teensy 4.1 is the most powerful Arduino compatible microcontroller available today.  Based on the NXP i.MX RT1062 ARM Cortex-M7 running at 600MHz with the ability to be overclocked.   It is formatted into a very compact ‘teensy’ board outline for easy embedding into projects or for use with solderless breadboards.  Perhaps best of all, it is compatible with the popular Arduino IDE programming environment as well as many of the existing Arduino libraries, so it is very easy to get up and running unlike many other advanced microcontrollers that are available.

The Teensy 4.1 modules are exactly the same except the NE version is missing the Ethernet PHY chip as shown here.  This chip provides the interface between the Ethernet controller built into the NXP microprocessor and the physical Ethernet cable.

Some Teensy 4.1 are now being built without this chip due to on-going PHY chip shortages plus a price increase on the part.  If you don’t plan to use wired Ethernet, the NE version is a good option to consider since it is a little less expensive than the standard version and otherwise identical.

The Teensy product line which is focused on being fast , small and Arduino compatible is developed by the company PJRC.  They have a loyal following of designers and advanced hobbyists that create many libraries to take advantage of some of the more advanced features of the Teensy products or to modify Arduino libraries for compatibility.  Many of them also participate in the excellent PJRC forum.  The forum is targeted towards more advanced users and topics.

Just how fast is it?  The chart below shows the Teensy 4.x series compared to some other popular boards using the CoreMark Benchmark test.  Larger numbers = faster performance.

As another example, the classic Mandelbrot set was calculated and displayed using a Mega 2560 which took between 77 and 105 seconds per image.  Calculating the image is very mathematically intensive.  The Mega 2560 was then swapped out for the Teensy 4.1 and it took 1.24 to 1.26 seconds for the same task running the same software on both.

The Cortex-M7 is the first ARM microcontroller to use branch prediction. On the M4 as used on the Teensy 3.2, loops and other code which must branch take three clock cycles. With M7, after a loop has executed a few times, the branch prediction removes that overhead, allowing the branch instruction to run in only a single clock cycle.

Teensyduino automatically allocates your Arduino sketch code into ITCM and all non-malloc memory use is allocated to the fast DTCM, unless you add extra keywords to override the optimized default.

Teensy 4.1’s Cortex-M7 processor includes a floating point unit (FPU) which supports both 64 bit “double” and 32 bit “float”. With M4’s FPU on Teensy 3.5 & 3.6, and also Atmel SAMD51 chips, only 32 bit float is hardware accelerated. Any use of double, double functions like log(), sin(), cos() means slow software implemented math. Teensy 4.1 executes all of these with FPU hardware.

If you need/want all the horsepower but don’t necessarily need all the I/O and peripherals found on the Teensy 4.1, the Teensy 4.0 uses the same microcontroller in a smaller physical footprint that is also a little less expensive.

To program the Teensy using the Arduino IDE, you must first have the IDE installed if it is not already.  If it is installed but not the current version, now is a good time to update to the latest.

When Teensyduino is running which it should do automatically, a small window is opened on the desktop.  This is the Teensy Loader application that handles the actual download to the Teensy board.  Most of the time you can ignore this window as it defaults to Auto Mode which means it will take care of automatically downloading to the Teensy without needing to press the Teensy Program button, but it does need to be running in order to download to the Teensy boards.

If the setup is correct, the software will compile and download to the Teensy.  The onboard LED should start blinking once per second.  Since the board will already have Blink installed when you receive it, you might want to change the timing of the blink to verify the new download was successful.

The Teensy 4.1 operates at 3.3V internally and expects I/O to not exceed 3.3V.  It is not 5V tolerant on any of its pins except for the VIN and VSUB pins which can be used to supply 5V power to the module.

The Teensy 4.1 can be powered one of 3 different ways, but it is important to note that these are mutually exclusive unlike typical Arduino boards.  Internally the module does not provide any power switching between the different power inputs.  In essence, if you hook up two different power inputs such as through the USB cable and also through the VIN pin, those two power sources will be shorted together.

External power of 3.3V can also be applied to the 3.3V pins to power the Teensy in some cases, but this bypasses the on-board regulator which properly handles the power up sequence.  This option is not recommended without doing some research.  Specifically, VBAT needs a 3V power source such as a coin cell before applying power to the 3.3V pins.

The most likely way to run into trouble with power is by having the Teensy normally powered through VIN and then deciding to hookup the USB cable to download new code without disconnecting VIN first.

The USB port on the Teensy 4.1 has significant functionality not available on a normal Arduino.  For most standard applications it should be set to the default “Serial” mode which is how it works with an Arduino.  If you have problems connecting to the Teensy, check this setting.

The button on a Teensy board is not a typical reset button like on an Arduino.   When pressed, the program button causes the Teensy to enter ‘Programming Mode” where it waits for a download over USB.  If the Teensy is connected to the IDE via a USB cable, the last program will automatically be downloaded again and ran.

You didn’t select the Teensy 4.1 because it has a slow CPU, so naturally you are going to notice the CPU speed selection available in the IDE while poking around.

There are two 8-pin SMD footprints on the bottom of the module under the SD card slot.  The user can add chips to these locations to enhance the functionality or they can buy our preassembled and tested Teensy 4.1 Fully Loaded products near the bottom of the page.

These chips come in the WSON package that have the leads tucked under the body and require decent soldering skills to solder on well.  The Teensy 4.1 Fully Loaded product at the bottom of the page has these parts already installed.

These chips come in the WSON package that have the leads tucked under the body and require decent soldering skills to solder on well.  The Teensy 4.1 Fully Loaded product at the bottom of the page has these parts already installed.

Parts are available for adding a physical Ethernet port to the Teensy 4.1.  This is available as either a kit that requires some soldering or as a fully assembled board.

One of the 2×3 male headers in the kit is soldered to the Teensy 4.1 in the location as shown to the right for connecting the ribbon cable.  This part is a little trickier to solder due to tight spacing of small components on the bottom of the board.

Due to the strong processing power available in the Teensy products, they are a popular target for audio projects whether it is playing multiple WAV files simultaneously, synthesizing music or building sound reactive projects.  The Audio Adapter 4.x (Rev D) is designed for the Teensy 4.x product line and supports high quality 16-bit 44.1kHz sample rate (CD quality) audio.

For anyone that wants to attach probes, logic analyzers or jumpers directly to the Teensy 4.1, we have these high quality extended tail gold headers in 1×40 strips.

If the Teensy 4.1 sounds great but the soldering of SMD chips sounds less great, we have the Teensy 4.1 Fully Loaded.  It has either 8MB PSRAM & 16MB/64M-bit Flash memory, 8MB PSRAM & 128MB/1G-bit NAND Flash, 8MB PSRAM & 256MB/2G-bit NAND Flash or 16MB/128M-bit PSRAM chips installed and fully tested.  It also has the pins soldered on and has the header for the optional Ethernet added as well.

If you are looking for Teensy 4.1s that are configured to work with our Prototyping System for Teensy 4.1 or another baseboard that brings the VUSB, Ethernet, USB Host and VBat headers down from the bottom of the Teensy as well as having the VUSB trace cut and diode added to isolate USB and VIN power we have those as well.  Please note that these will not plug into a solderless breadboard due to the additional headers on the bottom of the module.

You can find the link to the full Teensy 4.1 Fully Loaded for Prototyping System information at the bottom of this page or by clicking on the pic above.

The Teensy line of boards are an excellent product that provides high performance and advanced I/O to tackle even the hardest problems which is why they are often found in advanced hobbyist projects as well as low volume production builds.

The PJRC forum provides access to excellent technical advice that is far more advanced than found on the normal Arduino forums.  It is the best place to find information on how to use the advanced features found in the Teensy.  It is not the place to get basic Arduino type questions answered however, which is good as the forum is not cluttered with ‘how do I blink an LED?’ type questions.

The Teensy 4.1 is currently at the top of the heap for performance and I/O capability.  You do need to take care of properly applying power and keeping I/O limited to 3.3V to avoid possible damage to the module.  If you are brand new to Arduino and programming, you might consider getting your feet wet with a standard Arduino clone board or consider the 5V tolerant Teensy boards like the Teensy 3.2 and Teensy 3.5 which are a little more fool-proof.

There are some other Teensy products that may be better suited depending on the application.  The Teensy 4.0 has the same CPU and basic performance, but in a smaller physical package with less I/O, 2MB of FLASH and is less expensive.  The Teensy 3.5 has a similar I/O footprint as the Teensy 4.1 and provides 5V tolerant I/O and it runs at 120MHz which is still way faster than the typical Arduino board.  The Teensy 3.2 is a mature product with the largest installed base and is in a small package format with 5V tolerant I/O and runs at 72MHz.

The Teensy 4.0 and 4.1 are very compact boards developed by Paul Stoffregen, based on the NXP iMXRT1062 ARM M7 processor running at 600 MHz and with 1 Mbytes of RAM.

These are now the fastest boards for running uLisp. In addition, for speed-critical tasks you can incorporate functions written in ARM machine code using the ARM assembler written in Lisp; see ARM assembler overview.

Support for the Teensy boards requires more customization than is currently available from the Arduino"s Boards Manager, so Paul decided to provide a Teensyduino installer that upgrades your copy of the Arduino IDE to provide the necessary Teensy support. The main upgrades affect the Serial Monitor, to support the many non-Serial protocols the Teensy boards support in the USB Type submenu on the Tools menu, and to optimise its performance to allow sustained high transmission rates without the Arduino IDE locking up.

For Mac OS 10.10 onwards PJRC provides a complete version of the Arduino IDE (currently 1.8.12) with the Teensy support already added, so no patching is necessary. You can use this to work with Teensy boards, as well as continuing to use it instead of the original Arduino application with your other boards.

Both boards have many other features not currently supported by uLisp, including: an Ethernet interface (Teensy 4.1 only), a USB host interface allowing you to connect a USB keyboard, three CAN Bus ports, an I2S Digital Audio interface, an S/PDIF Digital Audio interface, cryptographic acceleration, a random number generator, and an RTC for date/time.

TFT LCDs are the most popular color displays – the displays in smartphones, tablets, and laptops are actually the TFT LCDs only. There are TFT LCD shields available for Arduino in a variety of sizes like 1.44″, 1.8″, 2.0″, 2.4″, and 2.8″. Arduino is quite a humble machine whenever it comes to process or control graphics. After all, it is a microcontroller platform, and graphical applications usually require much greater processing resources. Still, Arduino is capable enough to control small display units. TFT LCDs are colorful display screens that can host beautiful user interfaces.

Most of the smaller TFT LCD shields can be controlled using the Adafruit TFT LCD library. There is also a larger TFT LCD shield of 3.5 inches, with an ILI9486 8-bit driver.

The Adafruit library does not support the ILI9486 driver. Actually, the Adafruit library is written to control only TFT displays smaller than 3.5 inches. To control the 3.5 inch TFT LCD touch screen, we need another library. This is MCUFRIEND_kbv. The MCUFRIEND_kbv library is, in fact, even easier to use in comparison to the Adafruit TFT LCD library. This library only requires instantiating a TFT object and even does not require specifying pin connections.

TFT LCDs for ArduinoUser interfaces are an essential part of any embedded application. The user interface enables any interaction with the end-user and makes possible the ultimate use of the device. The user interfaces are hosted using a number of devices like seven-segments, character LCDs, graphical LCDs, and full-color TFT LCDs. Out of all these devices, only full-color TFT displays are capable of hosting sophisticated interfaces. A sophisticated user interface may have many data fields to display or may need to host menus and sub-menus or host interactive graphics. A TFT LCD is an active matrix LCD capable of hosting high-quality images.

Arduino operates at low frequency. That is why it is not possible to render high-definition images or videos with Arduino. However, Arduino can control a small TFT display screen rendering graphically enriched data and commands. By interfacing a TFT LCD touch screen with Arduino, it is possible to render interactive graphics, menus, charts, graphs, and user panels.

Some of the popular full-color TFT LCDs available for Arduino include 3.5″ 480×320 display, 2.8″ 400×200 display, 2.4″ 320×240 display and 1.8″ 220×176 display. A TFT screen of appropriate size and resolution can be selected as per a given application.

If the user interface has only graphical data and commands, Atmega328 Arduino boards can control the display. If the user interface is a large program hosting several menus and/or submenus, Arduino Mega2560 should be preferred to control the TFT display. If the user interface needs to host high-resolution images and motions, ARM core Arduino boards like the DUE should be used to control the TFT display.

MCUFRIEND_kbv libraryAdafruit TFT LCD library supports only small TFT displays. For large TFT display shields like 3.5-inch, 3.6-inch, 3.95-inch, including 2.4-inch and 2.8-inch TFT LCDs, MCUFRIEND_kbv library is useful. This library has been designed to control 28-pin TFT LCD shields for Arduino UNO. It also works with Arduino Mega2560. Apart from UNO and Mega2560, the library also supports LEONARDO, DUE, ZERO, and M0-PRO. It also runs on NUCLEO-F103 and TEENSY3.2 with Sparkfun Adapter. The Mcufriend-style shields tend to have a resistive TouchScreen on A1, 7, A2, 6 but are not always in the same direction rotation. The MCUFRIEND_kbv library can be included in an Arduino sketch from the library manager.

The 3.5-inch TFT LCD shield needs to be plugged atop the Arduino board. The Mcufriend-style shields are designed to fit into all the above-mentioned Arduino boards. The shields have a TFT touch screen that can display colorful images and interfaces and a micro SD card reader to save images and other data. A 3.5-inch TFT LCD touch screen has the following pin diagram.

The drawFastVLine function draws a vertical line that starts in x, y location, and its length is h pixel and its color is t. The drawFastHLine function draws a horizontal line that starts in x and y location, and the length is w pixel, and the color is t. The drawLine function draws a line that starts in xi and yi locationends is in xj and yj, and the color is t. These methods draw lines with 5-pixel thickness.

How project worksThe code fills a rectangle, then draws a rectangle within which text “EEWORLDONLINE” is displayed. Then, lines, circles, rectangles, and squares are drawn on the screen. The project ends with a greeting and a message.

Fast and compact software I2C implementations (SimpleWireInterface, SimpleWireFastInterface) on Arduino platforms. Also provides adapter classes to allow the use of third party I2C libraries using the same API.

Fully Asynchronous UDP Library for Teensy 4.1 using QNEthernet. The library is easy to use and includes support for Unicast, Broadcast and Multicast environments.

Simple Ethernet Manager for MultiBlynk for Teensy, SAM DUE, SAMD21, SAMD51, nRF52, ESP32, ESP8266, RP2040-based (Nano_RP2040_Connect, RASPBERRY_PI_PICO) boards, etc. with or without SSL, configuration data saved in ESP8266/ESP32 LittleFS, SPIFFS, nRF52/RP2040 LittleFS/InternalFS, EEPROM, DueFlashStorage or SAMD FlashStorage.

Simple WiFiManager for Blynk with MultiWiFi Credentials, for Mega, SAM DUE, SAMD21, SAMD51, nRF52, STM32F/L/H/G/WB/MP1, Teensy, RP2040-based RASPBERRY_PI_PICO, etc. boards running ESP8266/ESP32-AT shields. Configuration data saved in EEPROM, EEPROM-emulated FlashStorage_STM32 or FlashStorage_SAMD, SAM-DUE DueFlashStorage or nRF52/TP2040 LittleFS.

Simple WiFiManager for Blynk and Mega, UNO WiFi Rev2, Teensy, SAM DUE, SAMD21, SAMD51, STM32, nRF52, RP2040-based boards, etc. using WiFiNINA shields, configuration data saved in EEPROM, FlashStorage_SAMD, FlashStorage_STM32, DueFlashStorage, nRF52/RP2040 LittleFS

DDNS Update Client Library for SAM DUE, nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, AVR Mega, megaAVR, Teensy, RP2040-based RASPBERRY_PI_PICO, WT32_ETH01, Portenta_H7, etc. besides ESP8266/ESP32, using ESP8266-AT/ESP32-AT WiFi, WiFiNINA, Ethernet W5x00, ENC28J60, LAN8742A or Teensy NativeEthernet

Library to detect a double reset, using EEPROM, DueFlashStorage, FlashStorage_SAMD, FlashStorage_RTL8720, FlashStorage_STM32 or LittleFS/InternalFS. For AVR, Teensy, SAM DUE, SAMD, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based Nano_RP2040_Connect, RASPBERRY_PI_PICO, RTL8720DN, MBED nRF52840-based Nano_33_BLE, Portenta_H7, etc. boards. Now using efficient FlashStorage_STM32 library and supporting new RP2040-based Nano_RP2040_Connect, Portenta_H7, RASPBERRY_PI_PICO and STM32 core v2.0.0

Simple WebServer library for AVR, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, SIPEED_MAIX_DUINO and RP2040-based (RASPBERRY_PI_PICO) boards using ESP8266/ESP32 AT-command shields with functions similar to those of ESP8266/ESP32 WebServer libraries

An ESP8266/ESP32-AT library for Arduino providing an easy-to-use way to control ESP8266-AT/ESP32-AT WiFi shields using AT-commands. For AVR, Teensy, SAM DUE, SAMD21, SAMD51, STM32, nRF52, SIPEED_MAIX_DUINO and RP2040-based (Nano_RP2040_Connect, RASPBERRY_PI_PICO, etc.) boards using ESP8266/ESP32 AT-command shields.

Simple Ethernet WebServer, HTTP Client and WebSocket Client library for AVR, AVR Dx, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52 and RASPBERRY_PI_PICO boards using Ethernet shields W5100, W5200, W5500, ENC28J60 or Teensy 4.1 NativeEthernet/QNEthernet

Simple TLS/SSL Ethernet WebServer, HTTP Client and WebSocket Client library for for AVR, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52 and RASPBERRY_PI_PICO boards using Ethernet shields W5100, W5200, W5500, ENC28J60 or Teensy 4.1 NativeEthernet/QNEthernet. It now supports Ethernet TLS/SSL Client.

Simple Ethernet library for AVR, AVR Dx, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52 and RASPBERRY_PI_PICO boards using Ethernet shields W5100, W5200, W5500, W5100S

Simple Ethernet Manager for Teensy, SAM DUE, SAMD, nRF52, ESP32 (including ESP32-S2/C3), ESP8266, RP2040-based Nano_RP2040_Connect, RASPBERRY_PI_PICO, etc. boards. Config data saved in ESP LittleFS, SPIFFS or EEPROM, nRF52 LittleFS, EEPROM, DueFlashStorage or SAMD FlashStorage.

A library for implementing fixed-point in-place Fast Fourier Transform on Arduino. It sacrifices precision and instead it is way faster than floating-point implementations.

FTP Client for Generic boards such as AVR Mega, megaAVR, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based (Nano-RP2040-Connect, RASPBERRY_PI_PICO, ESP32/ESP8266, etc.)

Enables GSM/GRPS network connection using the Generic GSM shields/modules. Supporting ESP32 (including ESP32-S2, ESP32-C3), ESP8266, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based boards, etc.

LiquidCrystal fork for displays based on HD44780. Uses the IOAbstraction library to work with i2c, PCF8574, MCP23017, Shift registers, Arduino pins and ports interchangably.

Library to detect a multi reset, using EEPROM, DueFlashStorage, FlashStorage_SAMD, FlashStorage_RTL8720, FlashStorage_STM32 or LittleFS/InternalFS. For AVR, Teensy, SAM DUE, SAMD, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based Nano_RP2040_Connect, RASPBERRY_PI_PICO, RTL8720DN, MBED nRF52840-based Nano_33_BLE, Portenta_H7, etc. boards. Now using efficient FlashStorage_STM32 library and supporting new RP2040-based Nano_RP2040_Connect, RASPBERRY_PI_PICO and STM32 core v2.0.0

Connects to MySQL or MariaDB using ESP8266/ESP32, WT32_ETH01 (ESP32 + LAN8720A), nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, SAM DUE, Mega, RP2040-based boards, Portenta_H7, etc. with W5x00, ENC28J60 Ethernet, Teensy 4.1 NativeEthernet/QNEthernet, WiFiNINA modules/shields or Portenta_H7 WiFi/Ethernet. W5x00 can use Ethernet_Generic library. ENC28J60 can use either EthernetENC or UIPEthernet Library.

The most powerful and popular available library for using 7/14/16 segment display, supporting daisy chaining so you can control mass amounts from your Arduino!

Menu library for Arduino with IoT capabilities that supports many input and display devices with a designer UI, code generator, CLI, and strong remote control capability.

This library enables you to use Hardware-based PWM channels on Teensy boards, such as Teensy 2.x, Teensy LC, Teensy 3.x, Teensy 4.x, Teensy MicroMod, etc., to create and output PWM to pins. Using the same functions as other FastPWM libraries to enable you to port PWM code easily between platforms.

This library enables you to use ISR-based PWM channels on Teensy boards, such as Teensy 2.x, Teensy LC, Teensy 3.x, Teensy 4.x, Teensy MicroMod, etc., to create and output PWM any GPIO pin.

This library enables you to use Interrupt from Hardware Timers on an Arduino, Adafruit or Sparkfun AVR board, such as Nano, UNO, Mega, Leonardo, YUN, Teensy, Feather_32u4, Feather_328P, Pro Micro, etc.

This library enables you to use Interrupt from Hardware Timers on supported Arduino boards such as AVR, Mega-AVR, ESP8266, ESP32, SAMD, SAM DUE, nRF52, STM32F/L/H/G/WB/MP1, Teensy, Nano-33-BLE, RP2040-based boards, etc.

A simple library to display numbers, text and animation on 4 and 6 digit 7-segment TM1637 based display modules. Offers non-blocking animations and scrolling!

Monochrome LCD, OLED and eInk Library. Display controller: SSD1305, SSD1306, SSD1309, SSD1312, SSD1316, SSD1318, SSD1320, SSD1322, SSD1325, SSD1327, SSD1329, SSD1606, SSD1607, SH1106, SH1107, SH1108, SH1122, T6963, RA8835, LC7981, PCD8544, PCF8812, HX1230, UC1601, UC1604, UC1608, UC1610, UC1611, UC1617, UC1638, UC1701, ST7511, ST7528, ST7565, ST7567, ST7571, ST7586, ST7588, ST75160, ST75256, ST75320, NT7534, ST7920, IST3020, IST3088, IST7920, LD7032, KS0108, KS0713, HD44102, T7932, SED1520, SBN1661, IL3820, MAX7219, GP1287, GP1247, GU800. Interfaces: I2C, SPI, Parallel.

True color TFT and OLED library, Up to 18 Bit color depth. Supported display controller: ST7735, ILI9163, ILI9325, ILI9341, ILI9486,LD50T6160, PCF8833, SEPS225, SSD1331, SSD1351, HX8352C.

RFC6455-based WebSockets Server and Client for Arduino boards, such as nRF52, Portenta_H7, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, Teensy, SAM DUE, RP2040-based boards, besides ESP8266/ESP32 (ESP32, ESP32_S2, ESP32_S3 and ESP32_C3) and WT32_ETH01. Ethernet shields W5100, W5200, W5500, ENC28J60, Teensy 4.1 NativeEthernet/QNEthernet or Portenta_H7 WiFi/Ethernet. Supporting websocket only mode for Socket.IO. Ethernet_Generic library is used as default for W5x00. Now supporting RP2040W

Light-Weight MultiWiFi/Credentials Manager for Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, RTL8720, etc. boards running Generic WiFi (WiFiNINA, WiFi101, ESP8266-AT, ESP32-AT, etc.) modules/shields. Powerful-yet-simple-to-use feature to enable adding dynamic custom parameters.

Light-Weight MultiWiFi/Credentials Manager for AVR Mega, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based (Nano RP2040 Connect, RASPBERRY_PI_PICO) boards, etc. using u-blox WiFiNINA / WiFi101 modules/shields. Powerful-yet-simple-to-use feature to enable adding dynamic custom parameters.

Enables network connection (local and Internet) and WiFiStorage for SAM DUE, SAMD21, SAMD51, Teensy, AVR (328P, 32u4, 16u4, etc.), Mega, STM32F/L/H/G/WB/MP1, nRF52, NINA_B302_ublox, NINA_B112_ublox, RP2040-based boards, etc. in addition to Arduino MKR WiFi 1010, Arduino MKR VIDOR 4000, Arduino UNO WiFi Rev.2, Nano 33 IoT, Nano RP2040 Connect. Now with fix of severe limitation to permit sending much larger data than total 4K and using new WiFi101_Generic library

Simple WiFiWebServer, HTTP Client and WebSocket Client library for AVR Mega, megaAVR, Portenta_H7, Teensy, SAM DUE, SAMD21, SAMD51, STM32F/L/H/G/WB/MP1, nRF52, RP2040-based (Nano-RP2040-Connect, RASPBERRY_PI_PICO, RASPBERRY_PI_PICO_W, ESP32/ESP8266, etc.) boards using WiFi, such as WiFiNINA, WiFi101, CYW43439, U-Blox W101, W102, ESP8266/ESP32-AT modules/shields, with functions similar to those of ESP8266/ESP32 WebServer libraries.