BLE power consumption spikes

RE: BLE power consumption spikes

user115252 — Thu, 12 May 2022 12:46:12 GMT

Hello. I tried updating the parameters in the prj.conf file as suggested in the guide you linked(the part about peripheral):

However it throws this error when building:

RE: BLE power consumption spikes

user2111 — Thu, 12 May 2022 11:56:37 GMT

Check out:
https://devzone.nordicsemi.com/guides/nrf-connect-sdk-guides/b/software/posts/building-a-bluetooth-application-on-nrf-connect-sdk-part-3-optimizing-the-connection

Slave latency is the "magic" parameter here.

Kenneth

RE: BLE power consumption spikes

user2111 — Thu, 12 May 2022 11:50:32 GMT

Can you try to run for instance: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/peripheral_lbs/README.html

Possible with CONFIG_SERIAL=n in prj.conf (and in child_image/hci_rpmsg.conf).

Kenneth

RE: BLE power consumption spikes

user115252 — Thu, 12 May 2022 11:37:05 GMT

Update: I figured out that they are probably from the peripheral sending empty packets to keep the connection alive

The question then becomes how to increase the length between these. The maximum value is supposed to be 4s which would be sufficient. I tried changing the default values of the connection parameters in gap.h and conn.h but to no effect.

I also tried using the bt_conn_le_param_update in the zephyr API but was not able to make it work (https://docs.zephyrproject.org/latest/doxygen/html/group__bt__conn.html#gab44a964725f54ed2d37de17c6e2fd3eb)

The central I'm using is an iPhone so the iOS parameter requirements need to be fulfilled aswell