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esp32p4-jc4880p443

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Firmware development for the Guition JC4880P443C_I_W (JC4880P443, JC4880P443C, often mistyped JC4880P433) — a 4.3" 480x800 IPS touch display board on the JC-ESP32P4-M3 module (ESP32-P4NRW32, 32 MB PSRAM, 16 MB flash, ESP32-C6 Wi-Fi co-processor on SDIO) — its ST7701S MIPI-DSI panel, GT911 touch, backlight, ES8311 codec with speaker amp and mic, microSD, RS485, battery charger, 2x13 header, and the PlatformIO + ESP-IDF (pioarduino) setup around them. Use when working on this board: project setup, platformio.ini and sdkconfig.defaults, the P4 silicon revision and an "Illegal instruction" boot, a black DSI screen, ST7701 init sequence and timings, GT911 init errors, backlight PWM, choosing a free GPIO, Wi-Fi through esp_hosted and esp_wifi_remote, SD card, audio, flashing over USB-C, or debugging why something on the board does not work.

skills/esp32/esp32p4-jc4880p443/SKILL.md

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Source commit 816967f30a7dbdf4759ad585b822eda3575f720c

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27
Repository last updated
Oct 30, 2026
License
MIT

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# 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.
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