nodemcu esp8266 1.8 tft lcd brands

I am using the 1.8″ color ST7735 TFT display a lot. The reason for that is that this display is very easy to use, it costs less than $5 and it offers color! At the back, the display has an SD card slot.A brief summary of the pins (adapted from Adafruits thorough summary):

RST – this is the TFT reset pin. Connect to ground to reset the TFT! Its best to have this pin controlled by the library so the display is reset cleanly, but you can also connect it to the Arduino Reset pin, which works for most cases.CS – this is the TFT SPI chip select pinD / C – this is the TFT SPI data or command selector pinDIN – this is the SPI Master Out Slave In pin (MOSI), it is used to send data from the microcontroller to the SD card and / or TFTSCLK – this is the SPI clock input pinVcc – this is the power pin, connect to 5VDC – it has reverse polarity protection but try to wire it right!LED – this is the input for the backlight control. Connect to 5VDC to turn on the backlight.GND – this is the power and signal ground pinNow that we know what we’re dealing with it’s time to start wiring!

Pins D5 (GPIO14) and D7 (GPIO13) are hardware SPI module pins of the ESP8266EX microcontroller respectively for SCK (serial clock) and MOSI (master-out slave-in).

The first library is a driver for the ST7735 TFT display which can be installed from Arduino IDE library manager (Sketch —> Include Library —> Manage Libraries …, in the search box write “st7735” and install the one from Adafruit).

Project hardware circuit should give the same result as the one shown in the following video where Arduino UNO board is used (NodeMCU is much faster than Arduino UNO):

I have two the same brand new displays of this type, several NodeMCU Lolin V3 boards. I checked the wires. Played around with several configuration parameters that I didn"t understand well like ST7735_INITB/ST7735_GREENTAB3/ST7735_REDTAB. etc.

NodeMCU has ESP-12 based serial WiFi integrated on board to provide GPIO, PWM, ADC, I2C and 1-WIRE resources at your finger tips, built-in USB-TTL serial with super reliable industrial strength CH340 for superior stability on all supported platforms.

ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during run-time.

The breakout has the TFT display soldered on (it uses a delicate flex-circuit connector) as well as a ultra-low-dropout 3.3V regulator and a 3/5V level shifter so that you can use it with 3.3V or 5V power and TTL control logic.

This is a single-chip controller/driver for 262K-color, graphic type TFT-LCD.  It consists of 396 source line and 162 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial Peripheral Interface (SPI), 8-bit/9-bit/16-bit/18-bit parallel interface.

The resulting data can be displayed both on a TFT screen connected to the sensors and through an online dashboard thanks to the services ofadafruit.io website.

Let’s see how to connect the different sensors and the TFT screen to our microcontroller:TSL2561 Lux sensor: The TSL2561 Lux sensor uses the I2C bus protocol, so we will need to connect the SDL and SDA pins of the sensor to the SDL and SDA pins of the microcontroller (in our case D1 and D2, but you will need to check for your specific microcontroller).

IMPORTANT NOTE ABOUT THE COMPONENTS: I used those components because were the components that I had avialable, BUT there are better options, like using BME280 instead of BME085 + DHT22, or maybe using a ILI9341 TFT screen.

My option has been to mount the sensors and the microcontroller on a protoboard solder board and the TFT screen on a smaller one, using 2 pieces of wood of 14x8cm and 8x4cm as support.

After finishing the assembly of the elements that make up the weather and air quality station, we will have a device that will show all the sensors information through the TFT screen, but taking advantage of the WiFi capabilities of our microcontroller we can also send the data to an MQTT online broker that includes dashboard functionalities, being able to view the data remotely.

Adafruit_ST7735 is the library we need to pair with the graphics library for hardware specific functions of the ST7735 TFT Display/SD-Card controller.

Basically, besides the obvious backlight, we tell the controller first what we are talking to with the CS pins. CS(TFT) selects data to be for the Display, and CS(SD) to set data for the SD-Card. Data is written to the selected device through SDA (display) or MOSI (SD-Card). Data is read from the SD-Card through MISO.

You can name your BMP file “parrot.bmp” or modify the Sketch to have the proper filename (in “spitftbitmap” line 70, and in “soft_spitftbitmap” line 74).

#define SD_CS 4 // Chip select line for SD card#define TFT_CS 10 // Chip select line for TFT display#define TFT_DC 9 // Data/command line for TFT#define TFT_RST 8 // Reset line for TFT (or connect to +5V)

#define SD_CS 4 // Chip select line for SD card#define TFT_CS 10 // Chip select line for TFT display#define TFT_DC 9 // Data/command line for TFT#define TFT_RST 8 // Reset line for TFT (or connect to +5V)

However, if your application needs your screen sideways, then you’d want to rotate the screen 90 degrees, effectively changing the display from a 128×160 pixel (WxH) screen to a 160×128 pixel display. Valid values are: 0 (0 degrees), 1 (90 degrees), 2 (180 degrees) and 3 (270 degrees).

tft.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a tortor imperdiet posuere. ");

For an upcoming new project I wanted a colour (UK spelling) LCD screen (ideally OLED), 256×256 (or greater) resolution and nice and cheap. It was not an easy 2 minute task. There were no OLED screens offering what I wanted (that I could see at the time). So compromises were made, in the end I purchased a 128×128 pixel screen (none OLED) for around $3.50 (£3.20, 3.50 Euro). Not as cheap as I thought I might get one for but the cheapest I could find. There were a lot of sellers offering this screen and it’s shown below.

Due to the planned game being more advanced than Space Invaders I needed a processor with more memory and speed than the Arduino could offer. Enter the ESP8266 processors which offer faster speeds and lots and lots more memory. Wifi is also available but will not be required for this project unless we implemented a World High Score Table perhaps! There are newer versions, ESP32, available with even more power but are more expensive and we don’t need that level of performance for this project. I’m using a NodeMCU from Lolin, which is basically a breakout board for the ESP8266 so that you can use it easily on breadboards or small production runs using through hole.

Power is self explanatory. LED adds a little extra brightness to the screen but it does still work if not connected. I’ve seen resistors added in series here and even variable ones to vary the brightness but I’ve ran it directly connected on this screen with no issues and wouldn’t want it dimmer as its not ultra bright. It is actually on even when not connected giving adequate brightness in my opinion. SCL is the SPI clock and goes to the NodeMCU’s hardware SPI pin (pin D5). SDA is actually the SPI MOSI connection and goes to the NodeMCU’s SPI MOSI pin (D7). RS is a Regsiter Select pin for ST7735 driver chips, this maps to a variable called TFT_DC in the Adafruitcode (explained later) that I was using for testing. This controls whether we are sending a command to the ST7735 chip or actual data. I think that Adafruit call it DC meaning Data Control, but I’m not sure. On some boards it may even be referred to as A0. For our purposed we connect it to D4. RST is the screen reset and and is connected to pin D3. These last two can connect to any NodeMCU pins that are not used for other functions. CS is Chip Select (usually referred to as Slave Select in the SPI protocol) and again can connect to any pin but I use D2. If this is pulled low then this device can receive or send data on the SPI bus. If only one device in your design you could pull this low permanently and not use D2.

Load up the example code that should now be available at “Files->Examples->XTronical ST7735 Library->GraphicsTestESP8266”. This is basically the Adafruit example with just some tiny changes (It goes through all the tests for each rotational position of the screen) so that it uses the new driver file and slightly altered initialisation routine.

There is an issue with the line drawing routine within the Adafruit GFX library, so this part of the original demo was removed. Basically it forces the NodeMCU to reset. As I’m not going ot be using this I’ve decided for now to ignore this issue.

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OTOSECTION.COM - Interfacing esp8266 nodemcu with ili9341 tft display- circuit diagram and arduino code at simple circuit esp8266 no more more 411 esp8266 3-5quot tft internet weather-

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The ili9341 tft module contains a display controller with the same name: ili9341. it’s a color display that uses spi interface protocol and requires 4 or 5 control pins, it’s low cost and easy to use. the resolution of this tft display is 240 x 320 which means it has 76800 pixels. Interfacing esp8266 nodemcu with ili9341 tft display. circuit diagram and arduino code at: simple circuit esp8266 no more more 4:11 esp8266 3.5" tft internet weather. 2.8" touch lcd spi for esp8266 (nodemcu) hey, just finished playing with my new 2.8" spi touch tft and getting it to work with a esp8266 (nodemcu) within the arduino in windows… it wasn’t something that ‘just worked’….i tried to get it to work a couple different ways and finally found a working solution. Here we wire two representative esp8266 boards: nodemcu and wemos d1 mini to a single row 14 pin header, 320*240 tft display that uses the four wire spi interface. figure 1.wiring diagram: 2.8 inch diagonal 320*240 tft display and an esp8266 nodemcu board. ili9143 controlled tft displays. Here is a video instruction how lo upload the files into spiffs of nodemcu(esp8266): tech note 038 esp8266 how to upload files to spiffs . to get the bodmer"s examples running, you need to upload his bitmaps from the data folder to the spiffs of yours esp8266 mcu. the main sketch file is esp8266 draw 565 image2.ino.

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