When performing Bluetooth LE RF testing on KW47 and MCXW72 devices, it may be necessary to configure the transmitter output power through a vendor-specific HCI command. NXP's Test Tool provides a convenient way to send HCI commands during Direct Test Mode (DTM) validation and characterization.
Although the Test Tool is still commonly referenced in documentation and application workflows, it is no longer actively maintained. As a result, the default HCI command XML definitions included with the tool do not correctly support the vendor-specific Tx power command required by KW47 and MCXW72 devices.
The default Test Tool XML does not correctly define the vendor-specific HCI_VENDOR_CONFIG_TX_POWER command for KW47 and MCXW72 devices. As a result, the command is not available in the GUI.
Edit BLE HCI 5.0 1.6.1.xml (typically located in C:\nxp\Test Tool 12.9.2.2\Xml) and replace the command definition with the XML snippet provided in this article. Alternatively, replace the original XML file with the updated file attached to this article.
Vendor_Commands
HCI_VENDOR_CONFIG_TX_POWER
HCI_VENDOR_CONFIG_TX_POWER Desc. OgB: FD OcB: 2D
01
3F 012D
tx_power
tx_power Desc
1
tInt
00
00
Channel
type Desc
1
tInt
00
00
NotUsed
Not Used
2
tInt
00
00
After updating the XML file and restarting Test Tool, HCI_VENDOR_CONFIG_TX_POWER should appear in the GUI.
HCI_VENDOR_CONFIG_TX_POWER command parameters:
- tx_power[1]: Supported values are 0x00 (0 dBm), 0x07 (7 dBm), and 0x0A (10 dBm).
- Channel[1]: Supported values are 0x00 (applies to advertising channels) and 0x01 (applies to non-advertising channels).
- NotUsed[2]: Reserved parameter. Always set this field to 0x0000.