Add ONX2432G028 board support

[weiweihaoyouwei]

Pull Request: Add ONX2432G028 board support

Summary

This PR adds support for the ONX2432G028 ESP32-S3 development board to ESP32 Marauder.

The board uses an ESP32-S3R8 module with a 2.8 inch 240 x 320 ST7789 SPI TFT panel, CST826 I2C capacitive touch controller, and a PCF8574 I2C IO expander for LCD reset and SDCS control.

Board reference: OpenNextion/OpenNextion-SKU-ONX2432G028

Hardware

Item	Value
Board	ONX2432G028
MCU	ESP32-S3R8
Flash	16 MB
PSRAM	8 MB OPI PSRAM
Display	2.8 inch ST7789 SPI TFT
Resolution	240 x 320
Display color order	BGR, validated with red/green/blue/gray color test
Touch	CST826 I2C capacitive touch
IO expander	PCF8574 I2C, used for LCD reset and SDCS
SD card	1-bit SDMMC

Pin mapping

Function	GPIO / Expander pin
I2C SDA	GPIO 8
I2C SCL	GPIO 7
SPI SCLK	GPIO 5
SPI MOSI	GPIO 1
LCD CS	GPIO 2
LCD DC	GPIO 3
LCD Backlight	GPIO 6
LCD Reset	PCF8574 EXIO6
Touch INT	PCF8574 EXIO5, optional; polling works
SD CLK	GPIO 11
SD CMD	GPIO 10
SD D0	GPIO 9
SDCS	PCF8574 EXIO7

Changes

• Added MARAUDER_ONX2432G028 board target and hardware name.
• Added User_Setup_onx2432g028.h for the ST7789 TFT panel and ONX2432G028 pin mapping.
• Added PCF8574-based LCD reset handling because the panel reset line is not connected to a direct ESP32-S3 GPIO.
• Added CST826 I2C capacitive touch support using the shared I2C bus.
• Added ONX-specific full-screen menu geometry while preserving the existing three-zone virtual navigation behavior.
• Added 1-bit SDMMC support for the onboard SD card slot.
• Updated SD-backed log/PCAP/GPX file handling to use SD_MMC for ONX SDMMC boards.
• Added GitHub Actions build matrix entries for release and nightly ONX2432G028 firmware artifacts.
• Adjusted the WPA3 Enterprise auth-mode guard so Arduino-ESP32 2.0.11 builds do not reference an unavailable enum.

Validation

Validated locally with:

• Arduino core: esp32:esp32 2.0.11
• Board FQBN: esp32:esp32:esp32s3
• Flash: 16 MB
• Partition layout used for validation: default_8MB
• PSRAM: PSRAM=opi
• GitHub Actions target artifact suffix: _onx2432g028.bin
• GitHub Actions matrix uses Arduino core 2.0.11, NimBLE-Arduino 1.3.8, PartitionScheme=default_8MB, FlashSize=16M, PSRAM=opi, and UART0 upload/serial settings.

Runtime validation:

• Firmware boots without reboot loops.
• Serial log reaches the ESP32 Marauder CLI prompt.
• ST7789 display initializes correctly at 240 x 320.
• ST7789 color order is BGR; red, green, blue, and gray ramp were validated with a temporary color test firmware.
• CST826 touch input works with the full-screen touch menu.
• SD card mounts through 1-bit SDMMC after formatting as FAT32.
• SD card root directory can be listed from the ESP32 Marauder CLI.
• SCRIPTS directory is created on SD card during initialization.

Build log excerpt

Target: ONX2432G028
FQBN: esp32:esp32:esp32s3:PartitionScheme=default_8MB,FlashSize=16M,PSRAM=opi,CDCOnBoot=default,UploadMode=default
Build flags: -DMARAUDER_ONX2432G028
TFT setup: User_Setup_onx2432g028.h

Sketch uses 1397409 bytes (41%) of program storage space. Maximum is 3342336 bytes.
Global variables use 60812 bytes (18%) of dynamic memory, leaving 266868 bytes for local variables. Maximum is 327680 bytes.

Serial boot and SD log excerpt

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x44c
load:0x403c9700,len:0xbe4
load:0x403cc700,len:0x2a68
entry 0x403c98d4
ESP-IDF version is: v4.4.5
Evil Portal Found 0 HTML files
Finished settings nodes
Changing to main menu...

[ASCII banner omitted]

--------------------------------
         ESP32 Marauder
            v1.12.2
       By: justcallmekoko
--------------------------------

> ls /
.fseventsd        0
.Spotlight-V100   0
SCRIPTS           0

Notes for reviewers

This PR adds a dedicated GitHub Actions build target for ONX2432G028, so maintainers can verify the firmware build without local hardware.

Most ONX-specific behavior is guarded by MARAUDER_ONX2432G028, HAS_ONX_CST826_TOUCH, or HAS_ONX_SD_MMC, so existing board targets should not enter the new display/touch/reset/SDMMC paths.

The ONX2432G028 target uses PSRAM=opi and keeps CDCOnBoot=default / UploadMode=default for the board's UART0 USB-UART upload and serial logging path.

Demo

A short runtime demo video is available here:

ONX2432G028.mp4