esp32p4-jc4880p443

Guition JC4880P443C_I_W (ESP32-P4, 4.3" 480×800)

A 4.3" portrait IPS panel with capacitive touch, bolted to the same JC-ESP32P4-M3 module Guition uses on its P4 dev boards: an ESP32-P4 with no radio, plus an ESP32-C6 that does the Wi-Fi over SDIO.

Three things shape almost every task on this board. First, the panel only works with Guition's ST7701 init sequence, and Guition hid it inside a patched copy of the driver: take their calling code with the registry driver and you get a black screen with every call returning ESP_OK. Second, the silicon comes in two incompatible revisions and ESP-IDF defaults to the one this board does not have — the symptom is a bootloader that dies with Illegal instruction. Third, Wi-Fi is a second chip with its own firmware and its own NVS, and under PlatformIO its host driver does not even start by itself.

• reference/board-hardware.md — the board: every module pad and where it goes, the GPIO budget, JP1, connectors, power tree, display chain and why the init table matters, touch, I2C, audio, SD, the silicon-revision table, measured memory/clock figures, the vendor archive and what is wrong in it, toolchain traps, flashing and recovery, Wi-Fi through the C6, and a symptom → cause → fix table.
• reference/recipes.md — code: platformio.ini, sdkconfig.defaults, the DSI panel with its full init table, framebuffer drawing, backlight, GT911, the I2C bus, ES8311 ID, battery, Wi-Fi scan through the C6, a 16 MB partition table, microSD, ES8311 audio + mic, Arduino settings. Each says whether it ran on hardware.
• reference/esp32p4-soc.md — the silicon: GPIO inventory, strapping, ADC, the three USB controllers, MIPI/SDMMC/LDO blocks. Shared with the esp32p4-jc-m3-dev skill.
• reference/esp32-family.md — the rest of the ESP32 line, for "should this be a different chip?" questions.
• template/ — a project that builds clean and has run on the board, in two variants, plus a scaffold script. See template/README.md.