esp32 lcd screen manufacturer

This MakePython ESP32 Color LCD is the color LCD version of the MakePython ESP32. The only difference is that this version using a colorful 1.3 inch LCD ST7789, which makes the boards suitable for applications that need a colorful display. Besides, also this version has 2 optional for users: WROOM(NO PSRAM) and WROVER(8MB PSRAM).

The MakePython ESP32 color LCD board is programmed with MicroPython by default, users can begin the MicroPython development as getting them on hand. There"s also the Makerfabs MakePython ESP8266.

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!~

Alibaba.com offers 941 esp32 with display products. About 30% % of these are integrated circuits （old）, 11%% are lcd modules, and 5%% are other electronic components.

ESP chips can generate various kinds of timings that needed by common LCDs on the market, like SPI LCD, I80 LCD (a.k.a Intel 8080 parallel LCD), RGB/SRGB LCD, I2C LCD, etc. The esp_lcd component is officially to support those LCDs with a group of universal APIs across chips.

In esp_lcd, an LCD panel is represented by esp_lcd_panel_handle_t, which plays the role of an abstract frame buffer, regardless of the frame memory is allocated inside ESP chip or in external LCD controller. Based on the location of the frame buffer and the hardware connection interface, the LCD panel drivers are mainly grouped into the following categories:

Controller based LCD driver involves multiple steps to get a panel handle, like bus allocation, IO device registration and controller driver install. The frame buffer is located in the controller’s internal GRAM (Graphical RAM). ESP-IDF provides only a limited number of LCD controller drivers out of the box (e.g. ST7789, SSD1306), More Controller Based LCD Drivers are maintained in the Espressif Component Registry _.

LCD Panel IO Operations - provides a set of APIs to operate the LCD panel, like turning on/off the display, setting the orientation, etc. These operations are common for either controller-based LCD panel driver or RGB LCD panel driver.

esp_lcd_panel_io_spi_config_t::dc_gpio_num: Sets the gpio number for the DC signal line (some LCD calls this RS line). The LCD driver will use this GPIO to switch between sending command and sending data.

esp_lcd_panel_io_spi_config_t::cs_gpio_num: Sets the gpio number for the CS signal line. The LCD driver will use this GPIO to select the LCD chip. If the SPI bus only has one device attached (i.e. this LCD), you can set the gpio number to -1 to occupy the bus exclusively.

esp_lcd_panel_io_spi_config_t::pclk_hz sets the frequency of the pixel clock, in Hz. The value should not exceed the range recommended in the LCD spec.

esp_lcd_panel_io_spi_config_t::spi_mode sets the SPI mode. The LCD driver will use this mode to communicate with the LCD. For the meaning of the SPI mode, please refer to the SPI Master API doc.

esp_lcd_panel_io_spi_config_t::lcd_cmd_bits and esp_lcd_panel_io_spi_config_t::lcd_param_bits set the bit width of the command and parameter that recognized by the LCD controller chip. This is chip specific, you should refer to your LCD spec in advance.

esp_lcd_panel_io_spi_config_t::trans_queue_depth sets the depth of the SPI transaction queue. A bigger value means more transactions can be queued up, but it also consumes more memory.

Install the LCD controller driver. The LCD controller driver is responsible for sending the commands and parameters to the LCD controller chip. In this step, you need to specify the SPI IO device handle that allocated in the last step, and some panel specific configurations:

esp_lcd_panel_dev_config_t::bits_per_pixel sets the bit width of the pixel color data. The LCD driver will use this value to calculate the number of bytes to send to the LCD controller chip.

esp_lcd_panel_io_i2c_config_t::dev_addr sets the I2C device address of the LCD controller chip. The LCD driver will use this address to communicate with the LCD controller chip.

esp_lcd_panel_io_i2c_config_t::lcd_cmd_bits and esp_lcd_panel_io_i2c_config_t::lcd_param_bits set the bit width of the command and parameter that recognized by the LCD controller chip. This is chip specific, you should refer to your LCD spec in advance.

Install the LCD controller driver. The LCD controller driver is responsible for sending the commands and parameters to the LCD controller chip. In this step, you need to specify the I2C IO device handle that allocated in the last step, and some panel specific configurations:

esp_lcd_panel_dev_config_t::bits_per_pixel sets the bit width of the pixel color data. The LCD driver will use this value to calculate the number of bytes to send to the LCD controller chip.

esp_lcd_i80_bus_config_t::data_gpio_nums is the array of the GPIO number of the data bus. The number of GPIOs should be equal to the esp_lcd_i80_bus_config_t::bus_width value.

esp_lcd_panel_io_i80_config_t::pclk_hz sets the pixel clock frequency in Hz. Higher pixel clock frequency will result in higher refresh rate, but may cause flickering if the DMA bandwidth is not sufficient or the LCD controller chip does not support high pixel clock frequency.

esp_lcd_panel_io_i80_config_t::lcd_cmd_bits and esp_lcd_panel_io_i80_config_t::lcd_param_bits set the bit width of the command and parameter that recognized by the LCD controller chip. This is chip specific, you should refer to your LCD spec in advance.

esp_lcd_panel_io_i80_config_t::trans_queue_depth sets the maximum number of transactions that can be queued in the LCD IO device. A bigger value means more transactions can be queued up, but it also consumes more memory.

Install the LCD controller driver. The LCD controller driver is responsible for sending the commands and parameters to the LCD controller chip. In this step, you need to specify the I80 IO device handle that allocated in the last step, and some panel specific configurations:

esp_lcd_panel_dev_config_t::bits_per_pixel sets the bit width of the pixel color data. The LCD driver will use this value to calculate the number of bytes to send to the LCD controller chip.

esp_lcd_panel_dev_config_t::reset_gpio_num sets the GPIO number of the reset pin. If the LCD controller chip does not have a reset pin, you can set this value to -1.

More LCD panel drivers and touch drivers are available in IDF Component Registry. The list of available and planned drivers with links is in this table.

esp_lcd_panel_draw_bitmap() is the most significant function, that will do the magic to draw the user provided color buffer to the LCD screen, where the draw window is also configurable.

Commands sent by this function are short, so they are sent using polling transactions. The function does not return before the command transfer is completed. If any queued transactions sent by esp_lcd_panel_io_tx_color() are still pending when this function is called, this function will wait until they are finished and the queue is empty before sending the command(s).

Commands sent by this function are short, so they are sent using polling transactions. The function does not return before the command transfer is completed. If any queued transactions sent by esp_lcd_panel_io_tx_color() are still pending when this function is called, this function will wait until they are finished and the queue is empty before sending the command(s).

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.

This tutorial shows how to use the I2C LCD (Liquid Crystal Display) with the ESP32 using Arduino IDE. We’ll show you how to wire the display, install the library and try sample code to write text on the LCD: static text, and scroll long messages. You can also use this guide with the ESP8266.

Additionally, it comes with a built-in potentiometer you can use to adjust the contrast between the background and the characters on the LCD. On a “regular” LCD you need to add a potentiometer to the circuit to adjust the contrast.

Before displaying text on the LCD, you need to find the LCD I2C address. With the LCD properly wired to the ESP32, upload the following I2C Scanner sketch.

After uploading the code, open the Serial Monitor at a baud rate of 115200. Press the ESP32 EN button. The I2C address should be displayed in the Serial Monitor.

Displaying static text on the LCD is very simple. All you have to do is select where you want the characters to be displayed on the screen, and then send the message to the display.

The next two lines set the number of columns and rows of your LCD display. If you’re using a display with another size, you should modify those variables.

To display a message on the screen, first you need to set the cursor to where you want your message to be written. The following line sets the cursor to the first column, first row.

Scrolling text on the LCD is specially useful when you want to display messages longer than 16 characters. The library comes with built-in functions that allows you to scroll text. However, many people experience problems with those functions because:

In a 16×2 LCD there are 32 blocks where you can display characters. Each block is made out of 5×8 tiny pixels. You can display custom characters by defining the state of each tiny pixel. For that, you can create a byte variable to hold  the state of each pixel.

In summary, in this tutorial we’ve shown you how to use an I2C LCD display with the ESP32/ESP8266 with Arduino IDE: how to display static text, scrolling text and custom characters. This tutorial also works with the Arduino board, you just need to change the pin assignment to use the Arduino I2C pins.

We hope you’ve found this tutorial useful. If you like ESP32 and you want to learn more, we recommend enrolling in Learn ESP32 with Arduino IDE course.

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.

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.

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!

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.

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