WIFI/BLE binary blobs

joolzg_svep — Sat, 22 Nov 2025 11:47:33 GMT

I was wondering if someone at NXP can explain why in mcuxsdk\components\conn_fwloader\fw_bin

rw61x_sb_ble_15d4_combo_a2.bin	218KB
rw61x_sb_ble_a2.bin	157KB
rw61x_sb_wifi_a2.bin	326KB

I would have expected the combo to have been the largest as it contains both WIFI and BLE.

Are the images named correctly?

Re: WIFI/BLE binary blobs

Christine_Li — Mon, 24 Nov 2025 02:40:06 GMT

Hi, @joolzg_svep

Thanks for creating case to us.

rw61x_sb_ble_15d4_combo_a2.bin is a BLE and 802.15.4 combo firmware(not include Wi-Fi), so its size is bigger than BLE only firmware: rw61x_sb_ble_a2.bin.

rw61x_sb_wifi_a2.bin is a Wi-Fi only firmware, not a Wi-Fi + BLE + 802.15.4 combo firmware.

As you know, Wi-Fi has more features and also more complex than BLE and 802.15.4, so its firmware is bigger than BLE only firmware, and even bigger than BLE + 802.15.4 combo firmware.

If you want to use Wi-Fi + BLE +802.15.4 together, then you need to flash rw61x_sb_wifi_a2.bin (for Wi-Fi) and also rw61x_sb_ble_15d4_combo_a2.bin(for BLE + 802.15.4.) because Wi-Fi and BLE has different CPUs in RW612. There is one Wi-Fi CPU and also one BLE CPU.

You can refer to below docs for details:

Getting Started with Wireless on RW61x Evaluation Board Running FreeRTOS

UM11799: NXP Wi-Fi and Bluetooth Demo Applications for RW61x

Is it clear for you?

Please let me know whether have any other concerns on this case, otherwise, please do not hesitate to mark my answer as a solution so that we can close this case.

Best regards,

Christine.

Other NXP Products中的主题 WIFI/BLE binary blobs

WIFI/BLE binary blobs

Re: WIFI/BLE binary blobs

Getting Started with Wireless on RW61x Evaluation Board Running FreeRTOS

UM11799: NXP Wi-Fi and Bluetooth Demo Applications for RW61x