RELOC has published detailed specifications and carrier-compatibility results for SCINTIX P4, a 55 × 40 mm ESP32-P4PriceAliExpress price compute module designed to fit Raspberry Pi Compute Module 4 and Compute Module 5 carrier boards. The 28 October 2026 technical article on Espressif’s Developer Portal confirms an ESP32-C6PriceAliExpress price wireless companion, 32 MB of PSRAM, 32 MB of flash, 10/100 Ethernet and MIPI display and camera interfaces.
Quick summary
- SCINTIX P4 is an MCU module, not a Raspberry Pi Compute Module or Linux single-board computer.
- The ESP32-P4PriceAliExpress price handles the application while a separate ESP32-C6 provides 2.4 GHz Wi-Fi 6, Bluetooth 5 and IEEE 802.15.4.
- It can reuse several CM4/CM5 carriers, but HDMI, PCIe and some Raspberry Pi header functions are not supported.
- The Crowd Supply campaign remains in pre-launch; no public campaign price or shipping date has been announced.
A compute module built around two Espressif chips
The main device is the ESP32-P4NRW32X, combining two 400 MHz RISC-V application cores with a lower-power core for always-on tasks. The module adds 32 MB of PSRAM and 32 MB of NOR flash, plus the P4’s 2D pixel accelerator and H.264 and JPEG hardware. Developers considering the underlying processor can compare it with the S3 in our ESP32-P4 versus ESP32-S3 guide.
| Section | SCINTIX P4 implementation |
|---|---|
| Main MCU | ESP32-P4NRW32X; dual 400 MHz RISC-V application cores plus a low-power core |
| Wireless | ESP32-C6 over four-bit SDIO and UART; Wi-Fi 6, Bluetooth 5 and IEEE 802.15.4 hardware |
| Memory | 32 MB PSRAM and 32 MB NOR flash |
| Wired and multimedia | 10/100 Ethernet PHY, USB 2.0 OTG, two-lane MIPI-DSI and two-lane MIPI-CSI |
| Mechanical | 55 × 40 mm with two Hirose DF40C 100-pin connectors |
The ESP32-C6 is not a second application processor. It is the radio companion, linked to the P4 through SDIO and UART. RELOC’s Wi-Fi example uses ESP-Hosted, the same broad split between a powerful P4 application MCU and a separate Espressif radio seen on the recently covered Adafruit Metro ESP32-P4 Hydra.
What CM4 and CM5 compatibility actually means
The practical attraction is carrier reuse. RELOC reports hardware-tested power, USB device, Ethernet and microSD operation on the official Raspberry Pi CM4 and CM5 IO boards. USB host is tested on the CM4 IO Board, while the CM5 IO Board needs a documented change. Several Waveshare carriers have also been tested, although other entries in RELOC’s matrix are schematic checks rather than physical tests.
This does not make SCINTIX P4 a drop-in functional replacement for a Linux Compute Module. The ESP32-P4 has no PCIe or HDMI output, and carrier features built around those interfaces do not transfer. Camera support on the official Raspberry Pi IO boards is currently marked as schematic-checked rather than hardware-tested.
The carrier’s familiar 40-pin header also needs careful reading. RELOC exposes 23 ESP32-P4 GPIOs there, not 40 independently available P4 pins. Some positions share a GPIO, some are used for the ESP32-C6, fan control or camera/display I²C, and Raspberry Pi header positions 3 and 5 are not connected. A peripheral pulling the P4’s boot strapping pin low can also prevent flashing. Developers should use the SCINTIX mapping rather than assume Raspberry Pi HAT pin functions. Our ESP32-P4 Function-EV-Board pinout guide likewise illustrates why board-level routing matters beyond the chip specification.
Software, performance claims and availability
The public repository includes Hello World, Ethernet, Wi-Fi and USB mass-storage examples. RELOC’s current basic examples target ESP-IDF 6.0.1; its Ethernet documentation reports roughly 73 Mbit/s uplink and 79 Mbit/s downlink in a UDP iperf test on the CM4 IO Board. Those are vendor-supplied results, not esp32.co.uk benchmarks.
RELOC also lists Arduino and PlatformIO compatibility, but the published bring-up instructions and tested examples use ESP-IDF. Software support should therefore be checked against the exact framework and peripheral combination required by a project.
Availability remains limited. Crowd Supply labels the project “coming soon”, without a campaign price or shipping estimate. RELOC says engineering samples can be requested directly and lists the module as available by enquiry, so that should not be read as normal retail stock. This esp32.co.uk report reflects the information published on 30 October 2026.
