Connecting ST7735 (ILI9xxx) to ESP8266

[MARK2580]

Hello. Today I received from AliExpress display ST7735/TFT/SPI/128*160

The display has contacts:

VCC
GND
CS
RESET
AO
SDA
SCK
LED

After searching I found that:
LED - LED
SCK - CLK
SDA - mosi
AO - DC
RESET - RESET
CS - CS
GND/VCC - 3.3V

As I understand it, the “ST7735 Display” component is outdated. I started studying the page with “ILI9xxx”. Nothing worked for me. After searching for it a bit, I found this post.

Connect TFT Color Screen LCD Display Module Drive ST7735 Interface SPI 128*160 to ESP8266 or ESP32

Even if this is an old post I want to share an extremly helpful link. Here you find a description of the pins that are named not very standard like: https://techoverflow.net/2023/05/30/minimal-esp32-platformio-128x160px-tft-display-example-using-adafruit-st7735/ My yaml configuration for the ST7735 display 128*160 is like: # --------------------------------------------------- # Configuration entry for Display PSI # --------------------------------------------------- spi: clk_pin: GPIO25 …

But nothing works for me either. The firmware loads, but then it says that the device is not responding, we will try to connect later. The ESP itself blinks the diode about 4 times, at the same time the screen backlight blinks and that’s it.

display:
  - platform: ili9xxx
    id: my_display
    model: ST7735
    invert_colors: false
    show_test_card: true    
    dc_pin: D5  # (AO)
    reset_pin: D4  # (Reset)
    dimensions:
      height: 128
      width: 160

spi:
  clk_pin: D7 # (CLK)
  mosi_pin: D6 # (SDA)

The display backlight is directly connected to 3.3V.

[Arh]

Firstly I have no idea but have you read this

ST7735 Display

[Karosm]

@MARK2580

spi:
  clk_pin: D7 # (CLK)
  mosi_pin: D6 # (SDA)

Esp8266
Mosi D7
CLK D5

[MARK2580]

@Arh

Firstly I have no idea but have you read this

@MARK2580

As I understand it, the “ST7735 Display” component is outdated. I started studying the page with “ILI9xxx”.

I already wrote. The page says that this component is outdated and may be removed.

[MARK2580]

@Karosm

Esp8266
Mosi D7
CLK D5

I don’t understand, D5 is already occupied by dc_pin

[Karosm]

Then make it unoccupied…
Try

cs_pin: D3
dc_pin: D2
reset_pin: D4

[MARK2580]

@Karosm

Then make it unoccupied…

I don’t understand anything, are you asking me to select some specific pins? It doesn’t seem to make sense. Here is my connection.

display:
  - platform: ili9xxx
    id: my_display
    model: ST7735
    invert_colors: false
    show_test_card: true    
    dc_pin: D2  # (AO)
    cs_pin: D3 # (CS)
    reset_pin: D4  # (Reset)
    dimensions:
      height: 128
      width: 160

spi:
  clk_pin: D0 # (CLK)
  mosi_pin: D1 # (SDA)

[Karosm]

@MARK2580

are you asking me to select some specific pins?

Yes.
spi:
clk_pin: D5 # (CLK)
mosi_pin: D7 # (SDA)

[MARK2580]

@Karosm

Yes.
spi:
clk_pin: D5 # (CLK)
mosi_pin: D7 # (SDA)

No difference. Also, when starting the ESP, the diode and backlight blink 4-5 times, and the following is written in the log.

WARNING Can't connect to ESPHome API for fancontrol @ 192.168.1.222: Error connecting to [AddrInfo(family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_STREAM: 1>, proto=6, sockaddr=IPv4Sockaddr(address='192.168.1.222', port=6053))]: [Errno 111] Connect call failed ('192.168.1.222', 6053) (SocketAPIError)
INFO Trying to connect to fancontrol @ 192.168.1.222 in the background

[Karosm]

keep the clk D5 and mosi D7
and try this on display component.

cs_pin: D8
dc_pin: D3
reset_pin: D4

[/quote]

[MARK2580]

I don’t know what the problem is, it doesn’t want to work. I even erased all the other code, leaving only the code for the display, but that didn’t help either. In the end, I inserted the old code st7735 and it worked right away, now it looks like I’ll have to wait until the next update removes it and everything breaks.