WiFi6 / BT5.2

Lichee-Jack supports WiFi 6 and Bluetooth 5.2 via the AIC8800 module used on the LicheeRV-Nano W.

The Wi‑Fi interface uses SDIO, while Bluetooth (BLE) uses a UART over USB transport.

WiFi driver

Lichee-Jack uses a patched AIC8800 driver based on the source from radxa-pkg/aic8800.

In the original driver Makefile, monitor mode and frame injection are disabled by default via the following macros:


# Enable Monitor+Data interface support (need FW support)
CONFIG_RWNX_MON_DATA = n
CONFIG_RWNX_MON_XMIT = n
CONFIG_RWNX_MON_RXFILTER = n

To enable active monitor mode (frame injection), modify them as follows:


# Enable Monitor+Data interface support (need FW support)
CONFIG_RWNX_MON_DATA = y
CONFIG_RWNX_MON_XMIT = y
CONFIG_RWNX_MON_RXFILTER = n

Important

CONFIG_RWNX_MON_RXFILTER must remain disabled. Enabling it will cause the kernel to fail capturing packets correctly.

With the above configuration, Lichee-Jack can reliably operate in monitor mode while retaining normal data interfaces.

Bluetooth (BLE)

On the LicheeRV-Nano W PCB, Bluetooth is gated by a footprint for an RN4-4020 (0Ω) resistor.

If you purchase a standard LicheeRV-Nano W, simply install this 0Ω resistor to enable BLE hardware routing.
No additional PCB modification is required.

Transport details

WiFi: SDIO (dedicated to WiFi 6)
Bluetooth / BLE: USB UART (RX / TX / CTS / RTS)

Bluetooth is not routed over SDIO because:

SDIO is already occupied by WiFi
Running BLE over SDIO on AIC8800 is unstable
UART-based transport provides significantly better stability and reliability

For this reason, Lichee-Jack uses USB UART for BLE exclusively.

This design ensures stable WiFi 6 operation, functional monitor mode with frame injection, and reliable Bluetooth 5.2 support without SDIO contention.