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ModusToolbox Bluetooth SDK

KoFo_4760836
New Contributor II

We're using CYW920706WCDEVAL and ModusToolbox 2.3. We set BR/EDR Tx Power either by modifying 'max_pwr_db_val' in 'hci_ag_cfg_settings' or by calling 'wiced_bt_dev_set_tx_power()' API.

Does the Tx Power we set remains constant all the time the service-layer connection exists? If not, can we influence it, for example, disable automatic power adjustment?

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1 Solution
SheetalJ
Moderator
Moderator

Yes the Tx power set after connection should remain constant for the whole connection time. 

View solution in original post

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6 Replies
SheetalJ
Moderator
Moderator

Hi @KoFo_4760836 ,

If you set the Tx power using wiced_bt_dev_set_tx_power() after a connection, the Tx power will be maintained throughout the connection time with that device. Otherwise the Tx power in the firmware will be considered. 

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KoFo_4760836
New Contributor II

Hi @SheetalJ ,

Thank you for the answer! But my question is actually: does the Tx Power we set remains constant all the time the service-layer connection exists? If not, can we influence it, for example, disable automatic power adjustment?

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SheetalJ
Moderator
Moderator

Yes the Tx power set after connection should remain constant for the whole connection time. 

View solution in original post

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KoFo_4760836
New Contributor II

So, you mean, if we set Tx power to 4 dBm and do not see in our air traces LMP_POWER_CONTROL_REQ or similar requests from the peer device to change the power, we can assume the Tx power of our CYW920706WCDEVAL is always 4 dBm, right?

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KoFo_4760836
New Contributor II

@SheetalJ Thank you very much!

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