Buffer Error and Display Failure on CYB - ESPHome Temperature Graph

[pleasedtohavemetyou]

I have tried to utilise the ESPHome Temperature Graph template to build a brand new ESP32-2432S028R.

Upon initial Compiling there is a fault necessitating a change to the yaml.

`display:

• platform: ili9xxx
  model: ili9341
  spi_id: tft
  cs_pin: GPIO15
  dc_pin: GPIO2
  rotation: 90
  invert_colors: False
  lambda: |-
  it.fill(id(Color::BLACK));
  it.print(0, 60, id(arimo14), TextAlign::TOP_LEFT, "35");
  it.print(0, 105, id(arimo14), TextAlign::CENTER_LEFT, "30");
  it.print(0, 150, id(arimo14), TextAlign::CENTER_LEFT, "25");
  it.print(0, 195, id(arimo14), TextAlign::CENTER_LEFT, "20");
  it.print(0, 240, id(arimo14), TextAlign::BOTTOM_LEFT, "15");
  if (id(temperature).has_state()) {
  it.printf(160, 0, id(arimo48), TextAlign::TOP_CENTER, "%.1f °C", id(temperature).state);
  }
  it.graph(20, 60, id(officegraph));`

However I am receiving an error that the display has failed.

YAML Config:

`
esphome:
name: server-room
friendly_name: server-room

esp32:
board: esp32dev
framework:
type: arduino

safe_mode: # Added 20th July 2024 for 2024.7.0
disabled: true
num_attempts: 3

logger:

api:
encryption:
key: "R/qw3zrtC312K1KN3rMC4YBQzONm+dnkZk2Un15mW8Y="

ota:

• platform: esphome
  password: "baa9b3ab468176390ea3b40510fa76d7"

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

ap:
ssid: "Server-Room Fallback Hotspot"
password: "TLv2GvtGpDsW"

font:

• file: 'fonts/Arimo-Regular.ttf'
  id: arimo48
  size: 48
  glyphs: " .,°0123456789C"
• file: 'fonts/Arimo-Regular.ttf'
  id: arimo14
  size: 14
  glyphs: "0123456789"

color:

• id: white
  hex: ffffff

• id: ha_blue
  hex: 51c0f2

• id: officegraph
  sensor: temperature
  duration: 1h
  width: 300
  height: 180
  x_grid: 10min
  y_grid: 5.0
  max_value: 35.0
  min_value: 15.0
  color: ha_blue

light:

• platform: monochromatic
  output: backlight_pwm
  name: Display Backlight
  id: backlight
  restore_mode: ALWAYS_ON

sensor:

• platform: homeassistant
  id: temperature
  entity_id: sensor.it_temperature
  internal: true

spi:

• id: tft
  clk_pin: GPIO14
  mosi_pin: GPIO13
  miso_pin: GPIO12
• id: touch
  clk_pin: GPIO25
  mosi_pin: GPIO32
  miso_pin: GPIO39

output:

• platform: ledc
  pin: GPIO21
  id: backlight_pwm

display:

• platform: ili9xxx
  model: ili9341
  spi_id: tft
  cs_pin: GPIO15
  dc_pin: GPIO2
  rotation: 90
  invert_colors: True
  lambda: |-
  it.fill(id(Color::BLACK));
  it.print(0, 60, id(arimo14), TextAlign::TOP_LEFT, "35");
  it.print(0, 105, id(arimo14), TextAlign::CENTER_LEFT, "30");
  it.print(0, 150, id(arimo14), TextAlign::CENTER_LEFT, "25");
  it.print(0, 195, id(arimo14), TextAlign::CENTER_LEFT, "20");
  it.print(0, 240, id(arimo14), TextAlign::BOTTOM_LEFT, "15");
  if (id(temperature).has_state()) {
  it.printf(160, 0, id(arimo48), TextAlign::TOP_CENTER, "%.1f °C", id(temperature).state);
  }
  it.graph(20, 60, id(officegraph));`

Error Log Attached

logs_server-room_run-2.txt

[jmealo]

I'm having the same issue.

[CodyReichert]

I'm hitting the same error, trying to figure out what config changes might be needed.

This, specifically, looks to be the issue (this is my error as well):

[16:48:10][C][ili9xxx:121]:   => Failed to init Memory: YES!

I noticed a few config changes in the last couple of ESPHome versions, so I'm almost sure we're just missing some config or need to change some model type somewhere. I'm not an ESPHome expert, but I will post here if I find anything.

[CodyReichert]

Ok I got it working after looking through some of the code examples. I assume the reason for your error was the same as mine:

If you have 2-USB port version of the CYD (USB-C and USB Micro) like me (https://www.amazon.com/dp/B0CLR7MQ91), there are a few config changes you can make to get the ESPHome examples working.

I changed a few things at once, so I'm not sure if all of these are required, but this got it working for me:

1. Use less lower in Wifi module
Edit: This isn't needed, just the two changes below. See edit.
The idea being that less power == less resource usage, which gives the display more RAM at boot. Implications are obviously a weaker wifi signal, so I want to remove this if possible.
(removed yaml)
2. Use correct model in the display config (see below)
3. Use smaller color_palette in display config.

display:
  - platform: ili9xxx
    # --- CHANGE 1: Set model to ST7789V ---
    model: ST7789V 
    spi_id: tft
    cs_pin: GPIO15
    dc_pin: GPIO2
    # --- CHANGE 2: Use 8BIT color_palette ---
    color_palette: 8BIT    
    invert_colors: False # You can try re-enabling this if colors look wrong
    lambda: |-
      it.fill(id(ha_blue));
      it.strftime(100, 100, id(arimo24), "%Y-%m-%d", id(esptime).now());
      it.strftime(40, 120, id(arimo96), "%H:%M", id(esptime).now());

This display config works for me (everything else from the ESPHome example's is OK)

Edit: Just tested without the lowered wifi power (1) and everything works, so that is not needed.

In the ILI9xxx docs there is a section for a custom init_sequence. Idk what that is, but perhaps there is some way to init the tft module first, so that it has enough RAM to boot. Maybe someone more knowledgeable than I can answer that.

Anyway, if you have a CYD2USB, the display config above should work in ESPHome.

[arthurlutz]

Could this be related to a new version of esphome ? esphome/issues#4315 seems related