LAUNCHXL-CC26X2R1: How to increase Tx Power of AoA +LAUNCHXL-CC26X2R1 and Troubleshooting connectivity RTLS_UI to 595-LAUNCHXL CC26XR1+595-BOOSTXL-AOA.

Hi,

1- Tx Power can be changed in RTLS examples the same way like other BLE examples (here is a thread dealing with this)
In your specific case, I recommend to add the HCI_EXT_SetTxPowerCmd() in the application initialization:

  // Create an RTOS queue for message from profile to be sent to app.
  appMsgQueueHandle = Util_constructQueue(&appMsgQueue);

  HCI_EXT_SetTxPowerCmd(HCI_EXT_TX_POWER_5_DBM);

For connection AoA, this should be done both on the rtls_master and the rtls_slave (no need to do it for the rtls_passive).
For connectionless-AoA, this is only required on the rtls_slave side.

On the rtls_slave side, I recommend to modify the content of the scan response to keep it accurate:

static uint8_t scanRspData[] =
{
  //...

  // Tx power level
  2,   // length of this data
  GAP_ADTYPE_POWER_LEVEL,
  5       // 5dBm
};

2- Almost correct :) As you said Bluetooth Low Energy uses the 2.4 GHz frequency band. The Bluetooth LE protocol divides the band into 40 channels. The CTE will be sent on 37 of these channels. The exact frequency of the CTEs will not be 2 400 MHz but will depend on the channel used. Please refer to our documentation and/or the Bluetooth Core Specifications for additional details.

3- Make sure no other application is trying to access the same COM port. For example, make sure you have closed the programming tool, any other instance of the RTLS_UI, your IDE, etc.

I hope these will help,

Best regards,