The new Olimex 400MHz RISC-V open-source hardware board

Every so often, a development board comes along that refuses to stay in its lane. The ESP32-P4-PC is one of those boards. Built around Espressif’s powerful ESP32-P4, it doesn’t merely expand on the typical ESP32 formula — it stretches it, upgrades it, and casually adds HDMI while it’s at it. At its core is a dual-core 400 MHz RISC-V processor paired with 768 KB of internal RAM and a generous 32 MB of external PSRAM. That’s the kind of memory configuration that quietly whispers, “You could do something serious with this.” Graphics, camera processing, advanced UI work, industrial logic control — this isn’t your average blink-an-LED platform. And then you look at the connectors. HDMI output means the board can connect directly to a monitor. Not through adapters. Not through guesswork. Just plug it in and render. Add MIPI DSI for displays and CSI for cameras, and suddenly the hardware board world feels a lot more multimedia-friendly. It’s no longer just about sensors and Wi-Fi dashboards; it’s about full visual interfaces. Speaking of interfaces, the four USB 2.0 Type-A ports feel almost indulgent. Keyboards, mice, storage, experimental peripherals — it’s all fair game. You can build a control console, a tiny kiosk, a data terminal, or something wonderfully unnecessary but technically impressive. Sometimes the best projects start with “I wonder if this will work.”

Networking is handled through Ethernet — stable, deterministic, and refreshingly reliable. In industrial environments, that’s not just convenient; it’s essential. Optional Power-over-Ethernet support makes deployments even cleaner, letting a single cable handle both power and data. No clutter, no drama. Storage comes via a microSD slot. Audio is available through a 3.5 mm jack. Power can be delivered over USB-C, and there’s support for LiPo batteries with UPS functionality. Expansion options include UEXT and fully exposed GPIO headers, keeping the board flexible for custom hardware integrations. Yet perhaps the most compelling feature isn’t a connector at all — it’s philosophy. True to OLIMEX tradition, the hardware board is open-source hardware. Schematics and layout files are available, inviting developers not just to use the board, but to understand it, adapt it, and build upon it. That transparency is increasingly rare, and deeply appreciated. All of this arrives at a price that feels almost suspiciously reasonable. For a board that edges toward mini-PC territory while staying firmly in the microcontroller domain, it offers remarkable value. The ESP32 ecosystem has steadily evolved, and the ESP32-P4 marks a clear shift toward higher-performance, interface-rich applications. With the ESP32-P4-PC, OLIMEX demonstrates what happens when you stop asking what a microcontroller board should include and start asking what it could include. The result is a platform that feels ambitious without being inaccessible — powerful without being overcomplicated. It invites experimentation. It encourages bigger ideas. And it might just redefine what developers expect from an ESP32 board.

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