Just wanted to share a basic working config for this device (JC3248W535) 
FYI much of this config is derived from here and I am only creating my own thread in the spirit of sharing the most minimal config possible for each device that I have on-hand.
Heads-up: I try to keep the configs in these posts updated but sometimes the configs in my repo are more up-to-date!
Here are the device-specific bits of the config separated out from everything else:
esphome:
platformio_options:
upload_speed: 921600
board_build.flash_mode: dio
board_build.f_flash: 80000000L
board_build.f_cpu: 240000000L
esp32:
board: esp32-s3-devkitc-1
variant: esp32s3
flash_size: 16MB
framework:
type: esp-idf
sdkconfig_options:
COMPILER_OPTIMIZATION_SIZE: y
CONFIG_ESP32S3_DEFAULT_CPU_FREQ_240: y
CONFIG_ESP32S3_DATA_CACHE_64KB: y
CONFIG_ESP32S3_DATA_CACHE_LINE_64B: y
CONFIG_SPIRAM_FETCH_INSTRUCTIONS: y
CONFIG_SPIRAM_RODATA: y
psram:
mode: octal
speed: 80MHz # 120MHz is not supported and falls back to 40MHz
spi:
- type: quad
clk_pin: 47
data_pins: [21, 48, 40, 39]
i2c:
- sda: 4
scl: 8
output:
- id: gpio_backlight_pwm
platform: ledc
pin: 1
light:
- id: backlight
name: Backlight
platform: monochromatic
output: gpio_backlight_pwm
restore_mode: ALWAYS_ON
display:
- id: main_display
platform: mipi_spi
model: JC3248W535
data_rate: 40MHz
update_interval: never
auto_clear_enabled: false
touchscreen:
- id: main_touchscreen
platform: axs15231
# on_touch:
# - lambda: |-
# ESP_LOGI("cal", "x=%d, y=%d, x_raw=%d, y_raw=%0d",
# touch.x,
# touch.y,
# touch.x_raw,
# touch.y_raw
# );
I like to keep device-specific code like that its own file separate from everything else so that I can use the Packages component to import it into multiple relevant projects, rather than duplicate the whole thing into each one. In my case I save it into a file called templates/JC3248W535.yaml.
In the spirit of not duplicating code into multiple projects, I create another file that is not device-specific but is common/repetitive among all my projects. In my case I chose to call it templates/common.yaml and it has code like so:
esphome:
name: "${device_name}"
friendly_name: "${friendly_name}"
logger:
level: INFO
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
web_server:
port: 80
ota:
- platform: esphome
api:
Finally, this is how I use both of the above files together in a project:
substitutions:
device_name: guition-35-test-device
friendly_name: Guition 3.5 Test Device
packages:
common: !include templates/common.yaml
device: !include templates/JC3248W535.yaml
# dashboard: !include templates/dashboard_480x320.yaml
#sensor: ...
Note: The contents of the dashboard package referenced above aren’t in this post but I have it in the example to illustrate the power of setting up a config this way. In my case templates/dashboard_480x320.yaml is a file that I’ve created with HA sensors and LVGL pages in it, and it can be reused on any of my devices that support the same resolution as this one.
Concerns / Potential Improvements
- TBD
Changes
- Sept 29 2025: Changed driver and increased display performance massively.
More in my GitHub repo
