https://devzone.nordicsemi.com/f/nordic-q-a/33567/sd_ble_gap_conn_param_update-abnormal-power-consumptionHI al I have a bicycle computer (A) host (SDK 12.1 51822QFAC S130-V2.0.1) and a slave device (B) for measuring bike speed and cadence (using 2032 batteries). 1. When the B device battery is running out of power, it can still work. a. I use the A deviceen-USTelligent Community 13Fri, 20 Apr 2018 11:38:49 GMThttps://devzone.nordicsemi.com/thread/129131?ContentTypeID=1Fri, 20 Apr 2018 11:38:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7b9619ed-15d4-43cf-a904-69c168e942fbFormerMember<p>I suspect that an assert occur upon sd_ble_gap_conn_param_update() since device B enter a non-operational state.</p> <p>Do you check all error codes? If you run the chip in debug mode, which error code does sd_ble_gap_conn_param_update() return?</p><div style="clear:both;"></div>