KW45B41Z BLE Set Max Tx Power Failing — Any External Pin Required?

[Amarnath_473]

I am using the KW45B41Z EVK with the SDK example bluetooth/wireless_uart_freertos. In the initialization flow, the function PLATFORM_SetBleMaxTxPower() is failing to set the BLE Tx power.

Is there any external hardware requirement for this to work? Do I need to configure any specific pins (e.g., antenna path control or LDO trim) for proper Tx power configuration on this EVK?

Also, can this API be called immediately after PLATFORM_InitBle() or should it be called after full BLE stack initialization?

Any suggestions are appreciated.

[luis_maravilla]

Hello hope you are doing well,

Could you help us confirm if the code has any modifications from the original in the SDK? And give more description about your set up please?

For external hardware requirement; you will need the NXP IoT Toolbox app in your phone or another KW45 EVK board to interact with.

I would strongly recommend checking the Bluetooth Low Energy Demo Applications User’s Guide Chapter 5.12 Wireless UART to follow the steps to run this example.

Best Regards

Luis

[Amarnath_473]

Hi @luis_maravilla ,

Thank you for the response.

I haven’t made any modifications to the example code from the SDK; I’m using it as provided.

For the setup, I’m using a KW45 EVK with MCU-Link for flashing and debugging. I’m still checking if any additional fuse burning is required for NBU usage in EVK , specifically for wireless communication. I’ll go through the Bluetooth Low Energy Demo Applications User’s Guide, as you suggested, and confirm the fuse process accordingly.

Please let me know if there’s anything specific I should look for regarding fuse programming.

Best Regards,

Amar

[luis_maravilla · Accepted solution]

Hello,

Thank you for the response.

There is no need to perform fuse burning in order to use the NBU.

Could you help us confirm that you followed up the installation of the NBU as the instructions described in Chapter 3.3 in the Getting Started? IF not, I would recommend completing the guide first. Getting Started with the KW45B41Z Evaluation Kit | NXP Semiconductors

Also, could you help us confirm the following

What SDK version are you using? What version of MCUXpresso are you using?

Best Regards

Luis

[Amarnath_473]

Hello Luis,

Thank you for the support. After going through the Getting Started guide, I updated the NBU firmware as per the instructions. It is working fine now.

Thanks again for the help.

Best Regards,
Amar.