Reyax RYWDB51_M2 Industrial Wi-Fi 6 & BLE 5.4 M.2 Card

The module is designed for embedded systems running Linux distributions (with standard SDIO host controllers) and various Real-Time Operating Systems (RTOS). Reyax provides or recommends using Texas Instruments' driver stack for the CC3351 chipset, which includes Linux kernel drivers and RTOS SDKs. Integration typically involves configuring the SDIO bus in your device tree (for Linux) and loading the appropriate firmware binaries for Wi-Fi and Bluetooth functionality.

The RYWDB51_M2 uses the standard M.2 Key E form factor, which relies on antenna leads integrated into the M.2 socket on your host board. You do not connect an external antenna directly to the card. Instead, ensure your carrier board or system has an M.2 slot with the correct Key E mechanical footprint and integrated u.FL/IPEX antenna connectors or PCB trace antennas routed to the socket's antenna contact pads. Proper impedance matching (50-ohm) is critical for optimal RF performance.

Power consumption varies by state: active transmit peaks at 450mA, receive is 62mA, deep sleep (with context retention) is 332µA, and shutdown is 12µA. Manage power using Wi-Fi 6's Target Wake Time (TWT) feature to schedule sleep intervals and the Bluetooth 5.4 low-power modes. In Linux, use `iw` and `hciconfig` commands to configure power save settings. Ensure your 3.3V power supply can deliver brief current spikes during transmission for stable operation.

No, the host interface is configured as either 4-bit SDIO or SPI, selected via hardware strapping pins on the module (consult the Reyax datasheet for pin definitions). SDIO is the primary, high-throughput interface for Wi-Fi data, while SPI is an alternative for hosts lacking SDIO controllers. The Bluetooth interface typically shares the SDIO lines or uses a separate UART, as defined in the host driver configuration and firmware.

Firmware updates are performed through the host system via the SDIO or UART interface, using vendor-specific tools provided by Texas Instruments for the CC3351 platform. This often involves placing the module in a bootloader mode by holding a specific GPIO pin during reset, then transferring the new firmware image (.bin file) using a serial protocol. Always refer to the latest Reyax or TI documentation for the correct procedure and files to avoid bricking the device.