ARK Just A Pi is a compact, same-form-factor carrier board built for the Raspberry Pi Compute Module 5 and is designed for plug-and-play connection to an autopilot. It includes a built-in Ethernet switch and JST-GH connectors, with support for PCIe, USB 3.0, USB 2.0, Micro HDMI, I2C, UART, SPI, PWM, GPIO, and two MIPI CSI interfaces. Two 100 Mbps Ethernet connections link to the onboard switch.
The board requires a 5 V supply providing at least 2 A, although actual demand depends on use and connected peripherals. It offers limited Raspberry Pi Compute Module 4 support, and its Micro SD slot works only with CM4 Lite or CM5 Lite modules without eMMC. ARK Just A Pi weighs 19.5 g, measures 4.0 × 5.5 × 1.31 cm, is built in the USA, and is NDAA compliant.
| Product type: | Carrier board |
| Primary module compatibility: | Raspberry Pi Compute Module 5 |
| Additional module compatibility: | Limited Raspberry Pi Compute Module 4 support |
| Power input: | 5 V |
| Minimum current: | 2 A; actual requirement depends on usage and connected peripherals |
| Power connector: | 6-pin Molex CLIK-Mate |
| Power module compatibility: | Matches ARK PAB power modules |
| I2C: | Supported |
| PCIe: | PCIe x2 via 16-pin FFC connector |
| PCIe connector layout: | Matches the Raspberry Pi 5 PCIe pinout |
| Display output: | Micro HDMI |
| Storage: | Micro SD slot; functional only with CM4 Lite or CM5 Lite modules without eMMC |
| UART0 (Debug / GPIO): | 6-pin JST-GH |
| UART2 / SPI3 / GPIO: | 6-pin JST-GH |
| UART3 / SPI4 / GPIO: | 6-pin JST-GH |
| UART4 / PWM / GPIO: | 6-pin JST-GH |
| Fan: | 4-pin JST-SH; matches Raspberry Pi 5 fan pinout |
| USB-C: | Dual-role USB 3.0 |
| USB: | USB 2.0 via 4-pin JST-GH |
| Ethernet: | Two 100 Mbps ports via 4-pin JST-GH connectors |
| Ethernet switching: | Both Ethernet ports connect to the built-in switch |
| MIPI CSI: | Two 22-pin, 0.5 mm FFC connectors |
| CSI connector layout: | Matches the Raspberry Pi 5 CSI pinout |
| Weight: | 19.5 g |
| Dimensions: | 4.0 × 5.5 × 1.31 cm |
