Hi, On Wed, Oct 12, 2016, Hieu Le wrote: > In my opinion, the only way I can find to increase the tx_power is to > recompile the linux kernel. There may be a better way > > It seems that bluetooth stack within kernel separated into two classes: > 1. Inquiry Tx_power. > 2. Advertise Tx_power. > > And the default value is 0. > > You can take a look at: > *hci_alloc_dev(void) function within net/bluetooth/hci_core.c file > hdev->inq_tx_power = HCI_TX_POWER_INVALID; > hdev->adv_tx_power = HCI_TX_POWER_INVALID; The adv_tx_power is not used for changing the controller advertising TX power. It's only used for reading the current controller setting and storing it in this variable. The reason for all this is that currently (as of Bluetooth 4.2) there is no standard HCI command for changing the advertising TX power. Johan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
