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.
GPIO Summary
| 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.
| 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: