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esp32p4-jc-m3-dev

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Firmware development for the Guition JC-ESP32P4-M3-DEV board (JC-ESP32P4-M3 module — ESP32-P4NRW32 with 32 MB in-package PSRAM, 16 MB flash, and an ESP32-C6 radio co-processor on SDIO) — its MIPI-DSI panel and MIPI-CSI camera connectors, IP101 Ethernet, ES8311 codec with speaker amplifier and microphone, microSD on SDMMC, RS485, three USB-C sockets, the 26-pin JP1 header, and the PlatformIO + ESP-IDF (pioarduino) setup around them. Use when working on this board or any ESP32-P4 devkit: project setup, platformio.ini and sdkconfig.defaults, the silicon revision split between rev v1.3 and rev v3.x, why the bootloader dies with "Illegal instruction", the pin map and which header pins are traps, Wi-Fi through esp_hosted and esp_wifi_remote, mounting the TF card and its on-chip LDO, bringing up a DSI panel, the shared I2C bus, audio direction and the amplifier enable, Ethernet RMII pins, choosing a free GPIO, flashing over any of the three USB-C ports, or debugging why something on the board does not work.

skills/esp32/esp32p4-jc-m3-dev/SKILL.md

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Source commit 816967f30a7dbdf4759ad585b822eda3575f720c

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Network or broad shell
Last checked
Nov 11, 2026

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27
Repository last updated
Oct 30, 2026
License
MIT

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# Guition JC-ESP32P4-M3-DEV

An ESP32-P4 carrier with a MIPI display connector, a MIPI camera connector, Ethernet,
audio, a card slot, RS485, a battery charger and **three USB-C sockets** — and a radio
that is a second chip you talk to over SDIO.

Three things shape almost every task on this board. First, **the P4 has no radio**:
`esp_wifi` is not the API, `esp_wifi_remote` over `esp_hosted` is, and the ESP32-C6 inside
the module needs its own firmware. Second, **the silicon comes in two mutually incompatible
revisions** and ESP-IDF defaults to the wrong one for the boards being sold — the symptom
is a bootloader that dies with `Illegal instruction`, which reads like corrupt flash.
Third, **there is no user LED**: the only thing that lights is the power indicator, so a
board that "does nothing" is usually a board that is running fine with its console on the
wrong socket.
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