ErnieHorning: Created ESP32-P Series GPIO Reference page

2026-07-24T15:38:00Z

Created ESP32-P Series GPIO Reference page

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{{DISPLAYTITLE:ESP32-P Series GPIO Reference}}

= ESP32-P Series GPIO Reference =

The ESP32-P Series currently consists of the ESP32-P4 processor. Unlike earlier ESP32 processors, the ESP32-P4 is designed for high-performance embedded applications requiring advanced graphics, camera interfaces, USB, Ethernet, and large numbers of GPIO pins.

GPIO assignments vary between development boards and modules. This page summarizes the GPIO characteristics of the ESP32-P Series and provides guidance for DIY holiday lighting applications.

[[File:ESP32-P Series GPIO Reference.png|center|900px|thumb|Figure 1 – Typical ESP32-P Series GPIO assignments.]]

== GPIO Summary ==

{| class="wikitable"
! Processor
! Approximate GPIO
! Input
! Output
! USB
! Wireless
! Notes
|-
| ESP32-P4
| Up to 55
| Yes
| Yes
| Multiple native USB interfaces
| None (requires companion wireless processor)
| High-performance dual-core RISC-V processor.
|}

== GPIO Categories ==

=== Recommended for Pixel Outputs ===

Most GPIO pins capable of digital output may be used for pixel data provided they are not reserved by the processor, development board, or firmware.

=== Boot (Strapping) Pins ===

Several GPIO pins are sampled during reset to determine processor startup mode. Refer to the processor datasheet and development board documentation before assigning these pins.

=== Reserved Pins ===

Certain GPIO pins may be dedicated to flash memory, USB interfaces, debugging functions, camera interfaces, display interfaces, or other onboard hardware depending on the module or development board.

=== USB Pins ===

The ESP32-P4 includes multiple USB interfaces. GPIO pins assigned to USB Serial/JTAG or USB OTG functions should generally not be reassigned unless those interfaces are no longer required.

== Processor Notes ==

=== ESP32-P4 ===

* Dual-core RISC-V processor
* Up to 55 GPIO pins
* Multiple native USB interfaces
* Ethernet support
* Camera interface support
* Display interface support
* High-speed graphics acceleration
* No built-in Wi-Fi or Bluetooth
* Designed to work with companion wireless processors such as the ESP32-C5 or ESP32-C6 for wireless connectivity. :contentReference[oaicite:2]{index=2}

== Practical Notes ==

Although the processor may support a particular GPIO, the development board may not expose every pin.

Some GPIO pins may already be connected to:

* USB interfaces
* Ethernet PHY
* Camera interface
* LCD or MIPI display interface
* Flash memory
* PSRAM
* Boot and reset buttons
* Status LEDs
* SD card interface

Always consult the development board schematic before assigning GPIO pins.

== Community Verified GPIO ==

The following information has been verified through testing by members of the DIY holiday lighting community.

{| class="wikitable sortable"
! Development Board
! Processor
! Firmware
! Version
! Verified Pixel Outputs
! Verified By
! Notes
|-
| ''No community testing submitted yet.''
|}

Additional community testing is encouraged.

== Firmware Considerations ==

Firmware may impose additional GPIO restrictions beyond those defined by the processor or development board.

Support for the ESP32-P Series continues to evolve. Always verify GPIO availability for the firmware version being used.

See:

* [[WLED]]
* [[ESPixelStick]]

== See Also ==

* [[ESP32 GPIO Reference]]
* [[ESP32-P Series]]
* [[ESP32 Development Boards]]
* [[Choosing an ESP32]]
* [[ESP32 Comparison Chart]]

ESP32-P Series GPIO Reference - Revision history

ErnieHorning: Created ESP32-P Series GPIO Reference page