Arduino GIGA R1 WiFi vs ESP32-P4: STM32H747 vs 400 MHz RISC-V for HMI, Vision and Control

The Arduino GIGA R1 WiFi and ESP32-P4 are both high-performance embedded platforms, but they are designed around very different priorities.

GIGA R1 WiFi is a complete large-format Arduino development board built around:

ESP32-P4 is primarily a high-performance multimedia MCU family built around:

The most important distinction is:

When wireless connectivity is required, an ESP32-P4 design normally adds a companion radio chip such as ESP32-C6 or ESP32-C5.

Important: This Is Not a Perfect Board-to-Board Comparison

GIGA R1 WiFi is one specific Arduino board.

ESP32-P4 is a processor family used on multiple boards.

So this comparison separates:

from:

Where a physical board example is useful, the comparison refers to Espressif’s current ESP32-P4 Function-EV-Board family.

Quick Comparison

Feature	Arduino GIGA R1 WiFi	ESP32-P4
Main processor	STM32H747XI	ESP32-P4
Main CPU architecture	Arm Cortex-M7 + Cortex-M4	Dual-core 32-bit RISC-V + LP RISC-V
Maximum main clock	M7 480 MHz, M4 240 MHz	HP cores up to 400 MHz
Low-power CPU	No separate LP application core	40 MHz LP RISC-V core
Internal RAM	1 MB	768 kB HP L2 + 32 kB LP SRAM + scratchpad
External RAM	8 MB SDRAM onboard	Up to 16/32 MB in-package PSRAM on current P4 variants; architecture supports large external memory
External Flash	16 MB onboard	Board/module dependent
GPIO	76 board GPIO	55 programmable GPIO at SoC level
Logic voltage	3.3 V	3.3 V-class I/O
Wi-Fi	Built in via Murata 1DX	Not integrated
Bluetooth	Built in via Murata 1DX	Not integrated
Ethernet	No onboard PHY	Ethernet MAC in SoC
CAN	FDCAN controller, external transceiver required	TWAI controller, external transceiver required
USB	USB-C peripheral + USB-A host	USB 2.0 High-Speed OTG + Full-Speed OTG + USB Serial/JTAG
Camera	Dedicated camera connector	MIPI CSI + parallel camera interface + ISP
Display	Dedicated display connector	MIPI DSI + LCD interface + PPA
H.264 encoder	No dedicated H.264 block	Yes
JPEG codec	STM32H7 JPEG peripheral	Dedicated JPEG codec
True DAC	2	No general-purpose DAC listed
Arduino support	Official Arduino Mbed core	Stable Arduino-ESP32 target

CPU: 480 MHz Cortex-M7 vs 400 MHz RISC-V

The headline frequencies are close:

but clock frequency alone does not decide performance.

GIGA combines:

• one very powerful Cortex-M7;
• one Cortex-M4 co-processor;
• large SDRAM;
• mature STM32H7 peripherals.

ESP32-P4 uses:

• two high-performance RISC-V cores;
• a separate low-power RISC-V core;
• two-level cache;
• multiple DMA engines;
• multimedia accelerators.

GIGA Has a Strong General-Purpose Dual-Core Model

The GIGA’s dual-core architecture is useful for splitting an embedded application into:

Arduino provides a documented RPC workflow for programming the two cores separately.

ESP32-P4 Adds a Dedicated Low-Power Core

In addition to the two high-performance RISC-V cores, P4 includes:

with low-power peripherals.

This is useful for:

• always-on monitoring;
• low-power wake logic;
• background sensing;
• sleep-oriented products.

Memory: Different Approaches

GIGA has a very straightforward board-level memory configuration:

That is excellent for:

• framebuffers;
• LVGL;
• camera images;
• audio;
• large buffers.

ESP32-P4 Uses High-Speed External-Memory Architecture

The P4 includes:

plus high-speed interfaces for external memory.

Current P4 package variants are available with substantial in-package PSRAM, including:

depending on part number.

This gives P4 a major advantage for memory-hungry:

• camera;
• display;
• video;
• AI vision;
• large UI.

GPIO Count

GIGA exposes:

across its main headers and camera/display connectors.

ESP32-P4 provides:

at SoC level.

GIGA therefore has the stronger headline I/O count.

GIGA Is Easier for Large Control Projects

The Mega/Due-style 2.54 mm headers make GIGA particularly convenient for:

• relays;
• buttons;
• parallel control interfaces;
• many sensors;
• large custom shields.

P4 boards tend to dedicate more pins and connectors to high-speed multimedia interfaces.

ESP32-P4 Is Much More Multimedia-Focused

P4 contains hardware specifically designed for cameras and displays:

• MIPI CSI;
• MIPI DSI;
• parallel camera interface;
• LCD interface;
• Image Signal Processor;
• Pixel Processing Accelerator;
• JPEG codec;
• H.264 encoder;
• 2D DMA;
• video DMA.

This is far beyond a normal microcontroller peripheral set.

MIPI CSI Is a Major P4 Advantage

GIGA has a dedicated camera connector and can capture camera data.

ESP32-P4 goes further with:

for high-speed camera interfaces.

This is better suited to:

• high-resolution cameras;
• vision systems;
• video pipelines;
• AI cameras.

MIPI DSI Is a Major Display Advantage

P4 also includes:

for high-speed display connectivity.

This allows fewer physical high-speed lanes than a large parallel RGB interface while supporting sophisticated displays.

Hardware H.264 Encoder

One of the biggest differences is:

GIGA does not provide a comparable dedicated H.264 video-encoding block.

For:

• network cameras;
• video doorbells;
• security cameras;
• video streaming;

P4 is much more purpose-built.

Image Signal Processor

P4 includes an:

for camera image processing.

This can offload operations that would otherwise consume substantial CPU time.

GIGA is capable of image processing in software, but its architecture is more general-purpose.

Wi-Fi: GIGA Has It Onboard

GIGA includes a Murata 1DX module with:

so normal networking works without adding another processor.

ESP32-P4 Has No Integrated Radio

This point is easy to misunderstand because of the:

name.

ESP32-P4 itself has:

It is the first thing you should check when designing a P4 system.

P4 Development Boards Add a Companion Radio

Espressif’s Function-EV-Board designs solve this by adding another ESP32 chip.

For example, current board families use companion modules such as:

for wireless communication.

The main P4 then communicates with the radio companion.

That Companion Architecture Has Advantages

Separating:

can be useful because:

• radio protocol work is offloaded;
• P4 remains focused on multimedia;
• newer radio technology can be selected independently.

But it is more complex than GIGA’s ready-to-use integrated wireless board.

Current P4 Function Boards Can Have Better Radio Technology

A current P4X-C5 Function-EV-Board adds:

through its ESP32-C5 companion.

That is more advanced radio capability than GIGA’s:

but remember that it comes from the companion chip, not from the P4 itself.

USB: P4 Has Much More High-Speed Hardware

GIGA provides:

which is very convenient for Arduino projects.

ESP32-P4 provides:

at SoC level.

This makes P4 better suited to applications that need:

• higher USB throughput;
• advanced USB host/device roles;
• camera/video transfer;
• high-speed storage;
• complex USB peripherals.

Ethernet

ESP32-P4 includes an:

and current Function-EV-Boards commonly include:

with the required PHY and RJ45 hardware.

GIGA does not include an onboard Ethernet PHY.

For wired network applications, P4 reference boards therefore have an advantage.

CAN / TWAI

GIGA includes:

and needs an external transceiver.

ESP32-P4 includes:

and also requires an external transceiver.

For modern CAN FD requirements, GIGA’s STM32H7 FDCAN peripheral is the more capable controller.

UART Count

GIGA provides:

ESP32-P4 provides:

at SoC level.

P4 therefore has more serial-controller hardware.

I2C and I3C

GIGA provides:

ESP32-P4 provides:

The:

controller is a notable P4 advantage for newer high-speed sensor/peripheral architectures.

SPI

GIGA provides:

P4 provides multiple SPI controllers, including:

although some resources may be consumed by memory or board-level hardware.

Audio

GIGA is very convenient for audio prototyping because it includes:

ESP32-P4 instead focuses on digital audio and multimedia pipelines with:

• multiple I2S controllers;
• PDM support;
• Voice Activity Detection;
• external audio-codec integration.

Function-EV-Boards commonly add an external audio codec, microphone and speaker amplifier.

True DAC: GIGA Wins

GIGA provides:

as true analogue outputs.

ESP32-P4 does not list a general-purpose DAC peripheral.

For simple analogue voltage output without an external chip, GIGA has the advantage.

Touch Sensing: P4 Wins

ESP32-P4 includes capacitive touch hardware.

GIGA does not provide an equivalent dedicated touch peripheral.

Security

GIGA includes an external:

secure element.

P4 includes a broad set of security hardware directly in the SoC:

• secure boot;
• Flash/external-memory encryption;
• AES;
• RSA;
• ECC;
• SHA;
• HMAC;
• digital-signature hardware;
• eFuse key storage;
• key manager.

Both can support serious secure products, but they approach security differently.

Arduino Support

GIGA uses Arduino’s official:

and the board is designed around the normal Arduino IDE workflow.

ESP32-P4 is now listed by Espressif as a:

so normal Arduino development is practical for:

• GPIO;
• ADC;
• UART;
• SPI;
• I2C;
• USB;
• Ethernet;
• other supported peripherals.

ESP-IDF Is Still the Natural Environment for Advanced P4 Features

If you buy a P4 because you specifically need:

ESP-IDF remains the more complete development environment.

Arduino support does not mean every advanced multimedia block has a simple one-line Arduino wrapper.

GIGA Has the Easier Arduino Learning Curve

GIGA behaves much more like a large conventional Arduino:

The P4 ecosystem is more like an application-processor-style MCU platform.

Which Is Better for Large Control Systems?

GIGA is usually easier.

Its:

make it straightforward for machine-control prototypes.

Which Is Better for HMI?

For conventional embedded displays, both are strong.

For demanding modern HMI with:

• MIPI DSI;
• large displays;
• complex animation;
• camera integration;
• hardware image processing;

ESP32-P4 is more purpose-built.

Which Is Better for Camera and Vision?

ESP32-P4.

The combination of:

gives it a major architectural advantage.

Which Is Better for Video Streaming?

ESP32-P4.

The dedicated:

is the decisive hardware feature.

Which Is Better for Simple Wireless IoT?

GIGA is simpler because wireless is already part of the board.

P4 needs:

to become a connected system.

Which Is Better for Wi-Fi 6?

The P4 itself has no Wi-Fi.

But a current P4 board paired with:

can provide dual-band Wi-Fi 6.

That board-level combination has more advanced wireless hardware than GIGA’s 2.4 GHz Wi-Fi 4 module.

Which Is Better for CAN FD?

GIGA.

Its STM32H747 includes FDCAN hardware.

P4’s TWAI peripheral is aimed at classic CAN-compatible operation.

Which Is Better for True Analogue Output?

GIGA.

It includes two true DAC outputs.

Which Is Better for High-Speed USB?

ESP32-P4.

Its:

is a major advantage over typical Full-Speed-class microcontroller USB.

Which Is Better for Ethernet?

P4-based Function-EV-Boards.

The P4 includes an Ethernet MAC and reference boards commonly provide an onboard PHY/RJ45 implementation.

Which Is Better for Prototyping with Jumper Wires?

GIGA.

Its large 2.54 mm header layout is easier to use on the bench.

Function-EV-Boards also break out GPIO, but the overall platform is more multimedia-oriented.

Which Is Better for an Edge-Vision Product?

ESP32-P4.

That is one of the workloads it was explicitly designed to handle.

Decision Table

Requirement	Better fit
Large Arduino-style headers	GIGA R1 WiFi
76 accessible GPIO	GIGA R1 WiFi
Built-in wireless on the board	GIGA R1 WiFi
Dual true DAC	GIGA R1 WiFi
CAN FD controller	GIGA R1 WiFi
Wide 6-24 V VIN	GIGA R1 WiFi
Simple Arduino workflow	GIGA R1 WiFi
MIPI CSI camera	ESP32-P4
MIPI DSI display	ESP32-P4
Hardware H.264 encode	ESP32-P4
Image Signal Processor	ESP32-P4
Large PSRAM options	ESP32-P4
USB 2.0 High-Speed	ESP32-P4
I3C	ESP32-P4
More UART controllers	ESP32-P4
Capacitive touch	ESP32-P4
Edge vision / video	ESP32-P4

Quick Reference

Final Thoughts

GIGA R1 WiFi and ESP32-P4 overlap at the high-performance end of microcontroller development, but they are not aimed at exactly the same system.

Choose GIGA R1 WiFi when you want:

• a complete Arduino board;
• large accessible GPIO headers;
• built-in Wi-Fi/Bluetooth;
• dual DAC;
• FDCAN;
• simple Arduino development;
• wide-input control-system integration.

Choose an ESP32-P4 platform when the application is dominated by:

• large HMI;
• MIPI displays;
• MIPI cameras;
• image processing;
• H.264 video;
• high-speed USB;
• edge vision;
• large PSRAM workloads.

The simplest distinction is:

For the GIGA hardware mapping, see our Arduino GIGA R1 WiFi pinout guide. For the P4 board itself, see our ESP32-P4 Function-EV-Board pinout guide.