power consumption in nrf52840?

[RAGHAV_M]

i need information on power consumption during advertising and connection in my case its taking too much high current around 1 ma in advertising and 1.5 ma during connection . i tried enabling dcdc convertor i tried disabling serial but not much improvement and in idle state its taking around 30 micro amps can u please help me to resolve this issue? i am using sdk 2.6.0 and zephyr application.

[Simonr]

Hi

Please check out this blog post on nRF52 series power optimization. If you don't have any luck, are you working on an nRF52840 DK or a custom board? Please upload the prj.conf file of your application so we can take a look.

Best regards,

Simon

[RAGHAV_M]

Hi Simonr,

thanks for the reply,

CONFIG_BT=y

CONFIG_BT_CENTRAL=y

CONFIG_BT_AUTO_PHY_UPDATE=n

CONFIG_BT_SCAN=y

CONFIG_BT_SCAN_FILTER_ENABLE=n

CONFIG_BT_MAX_CONN=5

# Allow to read RSSI for the connected peripheral

CONFIG_BT_CTLR_CONN_RSSI=y

CONFIG_NEWLIB_LIBC_MIN_REQUIRED_HEAP_SIZE=1024

# Use external clock source

CONFIG_CLOCK_CONTROL_NRF=y

CONFIG_CLOCK_CONTROL=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC_CALIBRATION=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y

# PERIPHERAL

CONFIG_BT_PERIPHERAL=y

CONFIG_SETTINGS=y

CONFIG_BT_SETTINGS=y

CONFIG_BT_GATT_CACHING=n

CONFIG_SETTINGS_NONE=y

# Distance Measurement

CONFIG_DM_MODULE=y

CONFIG_NEWLIB_LIBC=y

CONFIG_MPSL=y

CONFIG_MPSL_TIMESLOT_SESSION_COUNT=5

CONFIG_MPSL_WORK_STACK_SIZE=8192

CONFIG_DM_GPIO_DEBUG=n

CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_BT_DEVICE_NAME="Notify"

CONFIG_DM_INITIATOR_DELAY_US=2000

CONFIG_BT_GATT_CACHING=n

CONFIG_SETTINGS_NONE=y

CONFIG_BT_GATT_CLIENT=y

CONFIG_BT_DEBUG_LOG=y

CONFIG_LOG_MAX_LEVEL=4

CONFIG_DM_HIGH_PRECISION_CALC=y

# Enable PWM buzzer module

CONFIG_PRINTK=n

CONFIG_PWM=y

CONFIG_NRFX_GPIOTE0=y

CONFIG_NRFX_PDM=y

CONFIG_NRFX_PWM0=y

CONFIG_NRFX_PWM1=y

CONFIG_NRFX_PWM2=y

CONFIG_DEBUG=y

CONFIG_DEBUG_OPTIMIZATIONS=y

CONFIG_DEBUG_THREAD_INFO=y

# Enable ADC

CONFIG_ADC=y

# Enable NVS

CONFIG_NVS=y

CONFIG_FLASH=y

CONFIG_FLASH_PAGE_LAYOUT=y

CONFIG_MPU_ALLOW_FLASH_WRITE=y

CONFIG_DM_RANGING_OFFSET_US=100000

CONFIG_BT_PERIPHERAL_PREF_MIN_INT=120

CONFIG_BT_PERIPHERAL_PREF_MAX_INT=160

CONFIG_BT_CTLR_TX_PWR_PLUS_8=y

CONFIG_REBOOT=y

# Below configurations to enable DFU

# Enable mcumgr.

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_SIGN_IMAGES=y

CONFIG_SECURE_BOOT=y

CONFIG_SB_SIGNING_KEY_FILE="priv_key.pem"

CONFIG_BT_L2CAP_TX_MTU=252

CONFIG_BT_BUF_ACL_RX_SIZE=256

# Some command handlers require a large stack.

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

# TESTING features

CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y

CONFIG_PM_DEVICE=y

CONFIG_PM_DEVICE_POWER_DOMAIN=y

CONFIG_BOARD_ENABLE_DCDC=y

CONFIG_BOARD_ENABLE_DCDC_HV=y

this is my configurations

[RAGHAV_M]

Hi Simonr,

did u find any way to reduce power consumption

[Simonr]

Nothing specific yet. Try comparing this to the prj_minimal.conf file we have in ...\v2.6.0\nrf\samples\bluetooth\peripheral_uart\prj_minimal.conf.

Also please specify if you are working on an nRF52840 DK or a custom board.

Best regards,

Simon

[RAGHAV_M]

HI ,

Thanks for the reply i will check  and confirm

[RAGHAV_M]

Hi simonr,

i tried it but there is no reduction in current consumption

in idle state it is 35 micro amps

in advertising its ~1 ma

in connection it is ~1ma

and i am working on custom board but i tried in nrf52840 both showing same results