lcd display esp32 for sale

I bought this months ago, as I had no idea what to build with it until now, and the vendor has very little code support even after a year of sales. Overall, this is a wonderful little esp32 board with nice clear display, and built in charge controller. I soldered in a lipo bms battery and it ran my weather underground station very well for a few hours without a charge. It worked great for a few days, and it was very easy to code a weather station as there are some samples on GitHub that can be tweaked to your liking. It"s extremely fragile, but fortunately there is 3d print cases available, so be sure to have those lined up before you put into service. I see so many uses for this board, as it can be set up for geolocation or regional updates... And can serve very well as a low cost, low power board to do stem projects with kids. The only one issue is that after 4 hrs of use, the wifi radio no longer works, and it refuses to connect to any hotspot; I have no clue as the radio was barely used... Unfortunately it seems to have suffered a hardware failure 3 months after purchase. I hope vendor can warranty exchange it. Thank you

IoTs2 is a small-sized, low-power, low-cost, high-performance IoT embedded system. IoTs2 not only supports wired low-speed real-time network interfaces such as UART (or RS485), CANBus, and USB interfaces, but also supports WiFi (2.4GHz) high-speed wireless network interfaces. In addition to the on-board programmable buttons, indicators, RGB lights, retina-level color LCD, acceleration sensors and other resources, IoTs2 has 18 programmable I/Os (arranged in DIP).

A beautiful 3.5” touchscreen display, based on ESP32-WROVER, with a built-in 2M pixel OV2640 camera, makes it an ever perfect platform for your ESP32 projects.

Makerfabs ESP32 3.5” Touch with camera is absolutely open for makers, and besides, Makerfabs provide plenty of Demos to help the users on the usage. Have a try at this fantastic display in your next ESP32 project!~

WT32-SC01 is an ESP32 Development board with a 3.5-inch color touch screen. The touch screen enables a new way of interacting with the ESP32. The board is equipped with a graphical user interface (GUI) firmware, which supports graphical drag-and-drop programming and helps users develop a customized control platform.

The MakePython ESP32 WiFi Color LCD Display WROOM is programmed with MicroPython by default, users can begin the MicroPython development by getting them on hand.

This MakePython ESP32 Color LCD is the color LCD version of the MakePython ESP32. The only difference is that this version uses a colorful 1.3 inch LCD ST7789, which makes the boards suitable for applications that need a colorful display.

A few weeks ago, we examined the features of ESP32 module and built a simple hello world program to get ourselves familiar with the board. Today, we will continue our exploration of the ESP32 on a higher level as we will look at how to interface a 16×2 LCD with it.

Displays provide a fantastic way of providing feedback to users of any project and with the 16×2 LCD being one of the most popular displays among makers, and engineers, its probably the right way to start our exploration. For today’s tutorial, we will use an I2C based 16×2 LCD display because of the easy wiring it requires. It uses only four pins unlike the other versions of the display that requires at least 7 pins connected to the microcontroller board.

ESP32 comes in a module form, just like its predecessor, the ESP-12e, as a breakout board is usually needed to use the module. Thus when it’s going to be used in applications without a custom PCB, it is easier to use one of the development boards based on it. For today’s tutorial, we will use the DOIT ESP32 DevKit V1 which is one of the most popular ESP32 development boards.

The schematics for this project is relatively simple since we are connecting just the LCD to the DOIT Devkit v1. Since we are using I2C for communication, we will connect the pins of the LCD to the I2C pins of the DevKit. Connect the components as shown below.

Due to the power requirements of the LCD, it may not be bright enough when connected to the 3.3v pin of the ESP32. If that is the case, connect the VCC pin of the LCD to the Vin Pin of the ESP32 so it can draw power directly from the connected power source.

At this point, it is important to note that a special setup is required to enable you to use the Arduino IDE to program ESP32 based boards. We covered this in the introduction to ESP32 tutorial published a few weeks go. So, be sure to check it out.

To be able to easily write the code to interact with the I2C LCD display, we will use the I2C LCD library. The Library possesses functions and commands that make addressing the LCD easy. Download the I2C LCD library from the link attached and install on the Arduino IDE by simply extracting it into the Arduino’s library folder.

Before writing the code for the project, it’s important for us to know the I2C address of the LCD as we will be unable to talk to the display without it.

While some of the LCDs come with the address indicated on it or provided by the seller, in cases where this is not available, you can determine the address by using a simple sketch that sniffs the I2C line to detect what devices are connected alongside their address. This sketch is also a good way to test the correctness of your wiring or to determine if the LCD is working properly.

If you keep getting “no devices found”, it might help to take a look at the connections to be sure you didn’t mix things up and you could also go ahead and try 0x27 as the I2C address. This is a common address for most I2C LCD modules from China.

Our task for today’s tutorial is to display both static and scrolling text on the LCD, and to achieve that, we will use the I2C LCD library to reduce the amount of code we need to write. We will write two separate sketches; one to displaystatic textsand the other to display both static and scrolling text.

To start with the sketch for static text display, we start the code by including the library to be used for it, which in this case, is the I2C LCD library.

Next, we create an instance of the I2C LCD library class with the address of the display, the number of columns the display has (16 in this case), and the number of rows (2 in this case) as arguments.

With that done, we proceed to the void setup() function. Here we initialize the display and issue the command to turn the backlight on as it might be off by default depending on the LCD.

Next is the void loop() function. The idea behind the code for the loop is simple, we start by setting the cursor to the column and row of the display where we want the text to start from, and we proceed to display the text using the lcd.print() function. To allow the text to stay on the screen for a while (so its visible) before the loop is reloaded, we delay the code execution for 1000ms.

For the scrolling text, we will use some code developed by Rui Santos of RandomNerdTutorials.com. This code allows the display of static text on the first row and scrolling text on the second row of the display at the same time.

Next, we create an instance of the I2C LCD library class with the address of the display, the number of columns the display has (16 in this case), and the number of rows (2 in this case) as arguments.

Next, we create the function to display scrolling text. The function accepts four arguments; the row on which to display the scrolling text, the text to be displayed, the delay time between the shifting of characters, and the number of columns of the LCD.

Next is the void setup() function. The function stays the same as the one for the static text display as we initialize the display and turn on the backlight.

With that done, we move to the void loop() function. We start by setting the cursor, then we use the print function to display the static text and the scrollText() function is called to display the scrolling text.

Ensure your connections are properly done, connect the DOIT Devkit to your PC and upload either of the two sketches. You should see this display come up with the text as shown in the image below.

That’s it for today’s tutorial guys. Thanks for following this tutorial. This cheap LCD display provides a nice way of providing visual feedback for your project and even though the size of the screen and the quality of the display is limited, with the scrolling function you can increase the amount of text/characters that can be displayed.

Want to display sensor readings in your ESP32 projects without resorting to serial output? Then an I2C LCD display might be a better choice for you! It consumes only two GPIO pins which can also be shared with other I2C devices.

True to their name, these LCDs are ideal for displaying only text/characters. A 16×2 character LCD, for example, has an LED backlight and can display 32 ASCII characters in two rows of 16 characters each.

If you look closely you can see tiny rectangles for each character on the display and the pixels that make up a character. Each of these rectangles is a grid of 5×8 pixels.

At the heart of the adapter is an 8-bit I/O expander chip – PCF8574. This chip converts the I2C data from an ESP32 into the parallel data required for an LCD display.

If you are using multiple devices on the same I2C bus, you may need to set a different I2C address for the LCD adapter so that it does not conflict with another I2C device.

An important point here is that several companies manufacture the same PCF8574 chip, Texas Instruments and NXP Semiconductors, to name a few. And the I2C address of your LCD depends on the chip manufacturer.

So your LCD probably has a default I2C address 0x27Hex or 0x3FHex. However it is recommended that you find out the actual I2C address of the LCD before using it.

Connecting I2C LCD to ESP32 is very easy as you only need to connect 4 pins. Start by connecting the VCC pin to the VIN on the ESP32 and GND to ground.

Now we are left with the pins which are used for I2C communication. We are going to use the default I2C pins (GPIO#21 and GPIO#22) of the ESP32. Connect the SDA pin to the ESP32’s GPIO#21 and the SCL pin to the ESP32’s GPIO#22.

After wiring up the LCD you’ll need to adjust the contrast of the display. On the I2C module you will find a potentiometer that you can rotate with a small screwdriver.

Plug in the ESP32’s USB connector to power the LCD. You will see the backlight lit up. Now as you turn the knob on the potentiometer, you will start to see the first row of rectangles. If that happens, Congratulations! Your LCD is working fine.

The I2C address of your LCD depends on the manufacturer, as mentioned earlier. If your LCD has a Texas Instruments’ PCF8574 chip, its default I2C address is 0x27Hex. If your LCD has NXP Semiconductors’ PCF8574 chip, its default I2C address is 0x3FHex.

So your LCD probably has I2C address 0x27Hex or 0x3FHex. However it is recommended that you find out the actual I2C address of the LCD before using it. Luckily there’s an easy way to do this. Below is a simple I2C scanner sketch that scans your I2C bus and returns the address of each I2C device it finds.

After uploading the code, open the serial monitor at a baud rate of 115200 and press the EN button on the ESP32. You will see the I2C address of your I2C LCD display.

But, before you proceed to upload the sketch, you need to make a small change to make it work for you. You must pass the I2C address of your LCD and the dimensions of the display to the constructor of the LiquidCrystal_I2C class. If you are using a 16×2 character LCD, pass the 16 and 2; If you’re using a 20×4 LCD, pass 20 and 4. You got the point!

First of all an object of LiquidCrystal_I2C class is created. This object takes three parameters LiquidCrystal_I2C(address, columns, rows). This is where you need to enter the address you found earlier, and the dimensions of the display.

In ‘setup’ we call three functions. The first function is init(). It initializes the LCD object. The second function is clear(). This clears the LCD screen and moves the cursor to the top left corner. And third, the backlight() function turns on the LCD backlight.

After that we set the cursor position to the third column of the first row by calling the function lcd.setCursor(2, 0). The cursor position specifies the location where you want the new text to be displayed on the LCD. The upper left corner is assumed to be col=0, row=0.

lcd.scrollDisplayRight() function scrolls the contents of the display one space to the right. If you want the text to scroll continuously, you have to use this function inside a for loop.

lcd.scrollDisplayLeft() function scrolls the contents of the display one space to the left. Similar to above function, use this inside a for loop for continuous scrolling.

If you find the characters on the display dull and boring, you can create your own custom characters (glyphs) and symbols for your LCD. They are extremely useful when you want to display a character that is not part of the standard ASCII character set.

CGROM is used to store all permanent fonts that are displayed using their ASCII codes. For example, if we send 0x41 to the LCD, the letter ‘A’ will be printed on the display.

CGRAM is another memory used to store user defined characters. This RAM is limited to 64 bytes. For a 5×8 pixel based LCD, only 8 user-defined characters can be stored in CGRAM. And for 5×10 pixel based LCD only 4 user-defined characters can be stored.

Creating custom characters has never been easier! We have created a small application called Custom Character Generator. Can you see the blue grid below? You can click on any 5×8 pixel to set/clear that particular pixel. And as you click, the code for the character is generated next to the grid. This code can be used directly in your ESP32 sketch.

After the library is included and the LCD object is created, custom character arrays are defined. The array consists of 8 bytes, each byte representing a row of a 5×8 LED matrix. In this sketch, eight custom characters have been created.

ESP32-DevKitM-1 is a ESP32-MINI-1-based development board produced by Espressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitM-1 on a breadboard.

The ESP-WROVER-KIT comes with an ESP32-WROVER-E module by default. This board features support for an LCD and MicroSD card. The I/O pins have been broken out from the ESP32-WROVER-E for easy extension. The board carries an advanced multi-protocol USB bridge (the FTDI FT2232HL), enabling developers to use JTAG directly to debug the ESP32 module through the USB interface. The development board makes secondary development easy and cost-effective.

ESP32-PICO-KIT is Espressif"s smallest development board, as it fits into a mini breadboard. It is fully functional with the minimum number of discrete components, while it has all the ESP32 pins exposed.

ESP32-PICO-V3-ZERO-DevKit is a development board based on ESP32-PICO-V3-ZERO (ACK) module. Its pin layout is compatible with that of Arduino Zero development board, therefore, this ESP32-PICO-V3-ZERO-DevKit can directly plug in Arduino Zero board, or connect with other host boards and peripherals via jumper.

ESP32-PICO-DevKitM-2 is a ESP32-PICO-MINI-02-based development board produced by Espressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitM-1 on a breadboard.

ESP-EYE is a development board for image recognition and audio processing, which can be used in various AIoT applications. It features an ESP32 chip, a 2-Megapixel camera and a microphone. ESP-EYE offers plenty of storage, with an 8 MB PSRAM and a 4 MB flash. It also supports image transmission via Wi-Fi and debugging through a Micro-USB port.

The ESP32-LyraT development board is designed for the speech and voice recognition market. It integrates the ESP32-WROVER-E module, which includes a dual-core processor and 4.5 MB of operating memory. With this development board, only few peripheral devices are required for implementing a highly-integrated audio solution.

ESP32-LyraT-Mini is a lightweight audio development board based on ESP32-WROVER-E, which implements AEC, AGC, NS WWE (wake word engine) and other audio signal processing technologies.

ESP32-LyraTD-MSC, one of Espressif’s Audio Development Boards, is an Acoustic Echo Cancelation (AEC) solution supporting voice recognition, near-field and far-field voice wake-up. Audio files in the format of AAC, FLAC, OPUS and OGG can be decoded and output without quality loss. It also supports connection to Baidu"s DuerOS and Amazon"s Alexa Voice Service (AVS).

ESP32-LyraTD-SYNA is one of Espressif’s Audio Development Board based on ESP32 MCU and Synaptics DSP. It is an Acoustic Echo Cancelation (AEC) solution, supporting voice recognition and voice wake-up. It also supports connection to Amazon’s AVS (Alexa Voice Service), Google"s Dialogflow and Google"s GVA (Google Voice Assistant).

ESP32-LyraTD-DSPG is based on ESP32-WROVER-B, a BT/Wi-Fi combo module, and a digital signal processor (DSP) that features a three-microphone array for noise reduction, echo cancellation, beamforming and wake-word detection. ESP32-LyraTD-DSPG is integrated with peripheral devices and consists of two development boards. The sub board mainly consists of the microphone array, function keys and LEDs. The main board is integrated with power management, Wi-Fi and audio modules like dsp, codec and power amplifier. The two boards can be connected with FPC.

ESP32-Vaquita-DSPG is Espressif’s new Alexa built-in solution powered by ESP32 and DSP Group’s DBMD5P audio SoC. With a 2-Mic array which allows for a 360-degree pick-up, the solution provides a superior far-field voice recognition performance. The new ESP32-Vaquita-DSPG development kit is a turnkey solution for easily creating Alexa built-in connected devices that provide out-of-the-box voice enablement and AWS-IoT cloud connectivity.

ESP32-Korvo is an ESP32-based audio development board with microphone array, together with Espressif"s speech recognition SDK ESP-Skainet, ESP32-Korvo is suitable for far-field speech recognition applications with low power consumption. ESP32-Korvo is composed of two boards connected by an FPC cable: the main board contains ESP32-WROVER-E module, power port, micro SD card slot, earphone and speaker connectors; the sub board contains microphone array, function buttons and LEDs.

ESP32-Korvo-DU1906 is an Espressif audio development board with an ESP32-DU1906 module as its core. This board is designed not only to provide advanced end-to-end audio solutions with highly efficient integrated AI capabilities as well as a Cloud + End integrated device-level AIoT platform, significantly lowering the barrier to entry for IoT devices to AI capability.

ESP32-LCD-Kit is an HMI (Human Machine Interface) development board based on ESP32-DevKitC (need to purchase if you didn’t have one). ESP32-LCDKit is integrated with such peripherals as SD-Card, DAC-Audio, and can be connected an external display. The board is mainly used for HMI-related development and evaluation. Development board reserved screen interface type: SPI serial interface, 8-bit parallel interface, 16-bit parallel interface.

ESP32-Ethernet-Kit is an ESP32-based development board produced by Espressif. It consists of two development boards, the Ethernet board A and the PoE board B, The Ethernet board contains Bluetooth / Wi-Fi dual-mode ESP32-WROVER-E module and IP101GRI, a Single Port 10/100 Fast Ethernet Transceiver (PHY). The PoE board (B) provides power over Ethernet functionality. The A board can work independently, without the board B installed.