PCIe¶

The Quectel Pi M2 board exposes a single PCIe interface (RK3576 PCIe0, at 2a200000.pcie) via an M.2 slot, which is multiplexed between two use cases: a 5G module and an M.2 NVMe SSD. PCIe0 is configured by default for the 5G HAT use case (with modem power/reset/wake timing). When switching between the two, power off the board first, swap the M.2 device, then power on again. The M.2 slot accepts only one device at a time — the 5G module and NVMe SSD are mutually exclusive and cannot be used simultaneously.

This section assumes commands are executed from an SSH or Debug Uart terminal session; most commands can also be run from the Debian GNOME desktop terminal.