Lilygo T-Display S3 on ESPHome?

ESPHome
6

I actually have several displays around the house to monitor my blood glucose levels, besides using the AMOLED next to my bed. I also Lolin 2.4" TFT displays next to my computer and in the living room.

The graph works okay to show trend and magnitude/rate of change (haven’t figured out how to get the trend arrows yet), but without grid labels it is hard to get the value and time off of the graph. The graph get erased and starts over if the ESP32 is updated or reset. Is will try take a picture tomorrow (3:00 am here). Will also be changing the code to allow brightness to be adjusted from touchscreen.

I am looking forward to the LVGL support that is coming soon, that should make things easier.

7

Thanks @carbuthn I tried it, but still just a black screen. Where did you see the new 12c pins ?

I also have little displays all around the house and I’m starting to wonder if it might be possible just to integrate with a smart watch somehow. Then I can check my inverter status etc etc at any time just glancing at my watch.

8

AMOLED Schematics

One other difference I saw was unger platformio options

esphome:
  name: cgm-display-amoled
  friendly_name: CGM Display Amoled
  platformio_options:
    build_unflags: -Werror=all
    board_build.flash_mode: dio

It looks like LVGL didn’t make it into this month’s release of ESPHome, maybe next month.

9

Thanks for checking, added the build_unflags, still just black screen.

10

I’ve tracked down the exact order, it’s this one, from amazon: https://www.amazon.com/dp/B0BF542H39?ref=ppx_yo2ov_dt_b_product_details&th=1

Is it different to the AMOLED one above?

11

Yes that is a different animal, but should be doable. The pin information is the last picture on the Amazon page.

ESPHome Display Component Information

That display will use the ILI9xxx TFT LCD Series, ST7789V model.

It doesn’t seem to use I2C, so you will need to figure out the data pins. ClydeBarrow has been working on an I80 io_bus interface. https://community.home-assistant.io/t/unable-to-install-to-esp32-s3-lilygo-t-display-s3/467669/23. Look at the last post.

I don’t have that board so I can’t try it out and it about 12:30 am here, will try to look at it some more tomorrow.

12

Thanks so much. It says it does need a spi component. I could read off the pinouts the following, but it does not show the reset or mosi pins anywhere.


spi:
  clk_pin: GPIO12
  mosi_pin: GPIOXX

display:
  - platform: ili9xxx
    cs_pin: GPIO10
    dc_pin: GPIO11
    reset_pin: : GPIOXX
    model: ST7789V
    lambda: |-
      it.print(10, 10, id(font1), "Hello World!");
13

The trend arrows are unicode characters, but not every font has them. Finding a font that has all of them can be a bit tricky.

Starting point is here

All the Unicode details are there.

The nightscout API provides trend as one of the strings like “FortyFiveUp”.

So presently the state of my trend sensor is currently “Flat”. You can template to produce the required Unicode char \u2192.

14

That board does not use SPI to interface to the display. See here: Implement i80 bus for ili9xxx displays by clydebarrow · Pull Request #6537 · esphome/esphome · GitHub

15 
substitutions:
  name: t-display-s3-tft
  friendly_name: T-Display S3 TFT

esphome:
  name: ${name}
  friendly_name: ${friendly_name}
  platformio_options:
    build_unflags: -Werror=all
    board_build.flash_mode: dio


external_components:

 - source: github://clydebarrow/esphome@i8080
   components: [ i80, io_bus, ili9xxx, spi ] 

esp32:
  board: esp32-s3-devkitc-1
  variant: esp32s3
  framework:
    #type: arduino
    type: esp-idf

logger:
  level: DEBUG
  logs:
    lvgl: WARN

#wifi: !include wifi.yaml

#api:

#ota:

power_supply:
  - id: backlight
    enable_on_boot: true
    pin: GPIO38
  - id: lcd_pwr
    enable_on_boot: true
    pin: GPIO15

i80:
  dc_pin: 7
  wr_pin: 8
  rd_pin: 9
  data_pins: 
    - 39
    - 40
    - 41
    - 42
    -
      ignore_strapping_warning: true
      number: 45
    -
      ignore_strapping_warning: true
      number: 46
    - 47
    - 48
  

i2c:
  sda: 17
  scl: 18

psram:
  speed: 80MHz
  mode: octal

display:
  - platform: ili9xxx
    bus_type: i80
    cs_pin: 6
    reset_pin: 5
    id: w32_disp
    model: st7789v
    data_rate: 2MHz
    dimensions:
      height: 320
      width: 170
      offset_width: 35
      offset_height: 0
    transform:
      mirror_y: false
      mirror_x: false
      swap_xy: false
    color_order: bgr
    invert_colors: true
    auto_clear_enabled: false
    update_interval: never

lvgl:
1 Like
16

Yes!! Thank you @clydebarrow it works!! Thanks also to everyone else assisting!

17

For the life of me, I can’t seem to figure out how to get this to work. Every time, I get editor complaints about the display, but worse, the compile fails earlier with complaints about the config. If I have that trailing :, it fails on that…

INFO ESPHome 2024.10.2
INFO Reading configuration /config/esphome/test.yaml...
ERROR Unable to import component ili9xxx.display:
Traceback (most recent call last):
  File "/esphome/esphome/loader.py", line 177, in _lookup_module
    module = importlib.import_module(f"esphome.components.{domain}")
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/data/external_components/fbb92d5f/esphome/components/ili9xxx/display.py", line 6, in <module>
    from esphome.const import (
ImportError: cannot import name 'CONF_INIT_SEQUENCE' from 'esphome.const' (/esphome/esphome/const.py)
Failed config

display.ili9xxx: [source /config/esphome/test.yaml:72]
  
  Platform not found: 'display.ili9xxx'.
  platform: ili9xxx
  bus_type: i80
  cs_pin: 6
  reset_pin: 5
  id: w32_disp
  model: st7789v
  data_rate: 2MHz
  dimensions: 
    height: 320
    width: 170
    offset_width: 35
    offset_height: 0
19

ESPHome had a core change, which is reflected in the external component. You’ll need to use the dev branch or wait for the next release.

20

Thanks for the quick response!

21

I am trying to migrate away from GitHub - landonr/lilygo-tdisplays3-esphome: tdisplay s3 170x320 running esphome using patched tft_espi to the built-in ili9xxx platform, with st7789v model, which I thought meant there was support for Lilygo T-Display-S3, non touch.

My main reason is so that I can use the esp-idf esphome platform instead of arduino, as it is recommended in the Bluetooth Proxy docs: Bluetooth Proxy — ESPHome

@clydebarrow I saw you closed the 2 PRs related to this. Does this mean it’s not going to get merged into master for home assistant core?

22

Not in the foreseeable future, no.

23

hi, what about the the LilyGo T-Display Amoled S3 1.64 with touch:

is this supported in any way? I tried playing around with the pinout according to their doc but wasn’t able to display anything.

24

The qspi_dbi driver should work, but you will need to set up the init sequence which you can get by looking at the demo code.

25

Hi,
I have discovered this thread as I am in a same boat. Ihave purchased an AMOLED version without touch but screen stays black no matter I do.

Here is my YAML, do I do something wrong?

esphome:
  name: aqm-office-amoled
  platformio_options:
    build_unflags: -Werror=all
    board_build.flash_mode: dio

esp32:
  board: esp32-s3-devkitc-1
  variant: esp32s3
  framework:
    type: esp-idf   

logger:

# Enable Home Assistant API
api:
  encryption:
    key: "twv3D2MlKLeL1giE2DC5Aqjn1Eck/+16NXBzB809/9s="

ota:
  - platform: esphome
    password: "f9929fc9c0b1a52de36bc424f85941ff"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Aqm-Office-Amoled"
    password: "LkBeH8NprXMZ"

captive_portal:

spi:
  id: quad_spi
  type: quad
  clk_pin: 47
  data_pins:
    - 18
    - 7
    - 48
    - 5

i2c:
  sda: 3
  scl: 2

display:
  - platform: qspi_dbi
    model: RM67162
    id: main_lcd
    dimensions:
      height: 240
      width: 536
    transform:
      mirror_x: true
      swap_xy: true
    color_order: rgb
    brightness: 255
    cs_pin: 6
    reset_pin: 17
    enable_pin: 38
    lambda: |-
      it.filled_circle(it.get_width() / 2, it.get_height() / 2, 120, Color(255, 0, 0));

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27

Fixed by addding PSRAM parameters:

esp32:
  board: esp32-s3-devkitc-1
  flash_size: 16MB
  framework:
    type: esp-idf   

psram:
  mode: octal
  speed: 120MHz