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low power modes with zephyr and HCI

user8033

Hello,
I am looking into using zephyr with a host controller configuration on separate chips, where the controller is an nrf52832 chip.
I was wondering how would the power control work in that case.
are there any specific commands to turn off the ble module or does it automatically go to sleep in case of inactivity?

Thanks

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    Hi

    I see, thank you for explaining. The HCI power control is for changing the TX power dynamically, and not the actual power consumption of an HCI device. I think you need to set the nRF52832 to a low power mode somehow when it's done with BLE communication.

    You can check out the Bluetooth HCI low power UART sample that is based on the HCI UART sample you linked to, but using the Low power UART driver for HCI UART communication. This should result in lower power consumption as you can shut down the HF clock when the UART is in an idle state. When using the Low power UART driver, I guess you could tell the NRF52 to go to sleep whenever the UART goes idle, and wake up on activity on the UART line for example.

    Best regards,

    Simon

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  • 0

    Hi

    I see, thank you for explaining. The HCI power control is for changing the TX power dynamically, and not the actual power consumption of an HCI device. I think you need to set the nRF52832 to a low power mode somehow when it's done with BLE communication.

    You can check out the Bluetooth HCI low power UART sample that is based on the HCI UART sample you linked to, but using the Low power UART driver for HCI UART communication. This should result in lower power consumption as you can shut down the HF clock when the UART is in an idle state. When using the Low power UART driver, I guess you could tell the NRF52 to go to sleep whenever the UART goes idle, and wake up on activity on the UART line for example.

    Best regards,

    Simon

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