What is it?

The CM4-WRT-A is a Raspberry Pi CM4 carrier board that can be used to create a Gigabit router capable of supporting WiFi 6/6E as well as a 4G/5G connection.

Specifications

• Two PCIe M.2 Key M slots for NVME SSDs

• One PCIe M.2 Key E connector for a WIFI 6/6E adapter

• Two 1GBit Ethernet connectors: ETH0 the default LAN interface, and ETH1 typically used as the WAN interface.

• 5V PWM fan connectors: J17 and J18 (next to the CM4). The other two connectors are reserved for special GPIO functions, such as CM4 reset switch and CM4 Boot to USB Mass Storage mode.

• One Raspberry Pi Pico RP2040 micro-controller performs PWM fan control, board temperature sensor monitoring and watchdog functions.

• A six-pin header (J12) provides access to the CM4's UART0 and I2C bus. An OLED screen can be connected to this header and mounted into an updated version of the case.

• One USB 2.0 port connected to the CM4, can be used in both device and host mode.

• One USB1.1 port connected the RPi Pico, can be used in both device and host mode.

• Power Input: 12V DC. A power supply with a 5.5 X 2.1mm female barrel connector (center positive) and enough power for all the attached peripherals (36W minimum). A good power supply with sufficient power is critical.

• Support for power switch to power down CM4, ETH1 and PCIe peripherals.
• Dimensions: 147.4 x 91.0 mm

There is a 3D printed case available for the CM4-WRT-A baseboard. Select the KIT option when ordering, to get the board in a black 3D printed case. The STL files for which, are available in the CM4-WRT-A GitHub repo: https://github.com/MyTechCatalog/cm4-wrt-a/tree/main/case/ So that you can print your own if you prefer.

This is a true Gigabit router, that can route Gigabit traffic without breaking a sweat. You also get 2 PCIe M.2 Key M slots for NVME SSDs, or use an dapter to convert the middle one into a 4G/5G backup connection, and still have one NVME socket available, so that you can reduce the risk of losing data when the eMMC or microSD card fails.