Continuous TX Carrier Mode & Channel Selection on Renesas BT Module (CodeLess / Custom Firmware)

We are working on RF measurements with a Bluetooth module from Renesas and need to configure the device for continuous TX carrier mode along with channel selection capabilities.

From our communication with Renesas, we understand:

  • There is no custom firmware developed for this purpose by Renesas.

  • The available firmware is CodeLess, which uses AT commands.

  • While transmission power can be adjusted using CodeLess, channel selection for TX carrier mode does not seem to be supported.

We would like to ask:

  1. Is there a developer version of the app or a dedicated PC software that can allow us to set the device into continuous TX carrier mode and select specific channels for testing?

  2. Is there any way to configure multiple channels or perform frequency hopping under a controlled test scenario?

  3. While we understand that transmission power can be adjusted using CodeLess, could someone please guide us on how exactly this is done?

We appreciate any insights or shared experiences on setting up the Renesas BT module for RF testing, especially continuous transmission and channel configuration.

Thanks in advance!

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  • Hi

    Thank you for your kind assistance. We are currently using the DA14531MOD-00F01002332 module, and we would like to establish UART communication with it.

    Could you please confirm which specific pins need to be soldered or connected for proper UART communication (TX, RX, GND, and VCC)? 

  • Hi Suprio,

    Thank you for the reply.

    Thank you for your kind assistance. We are currently using the DA14531MOD-00F01002332 module, and we would like to establish UART communication with it.

    The DA14531MOD has an integrated SPI Flash. For that reason some GPIOs are not exposed.
    On the DA14531MOD you cannot use 2-wire UART programming. And for 1-wire UART programming you cannot use P0_3 but only P0_5.
    So, for the prod_test firmware you should use the following:


    For CodeLess SDK in order to use UART you can use the default GPIOs:

    4-Wire UART is mandatory if you want to use Binary mode (datapump set) or AT+SLEEP command.

    Best Regards,
    OV_Renesas