power consumption in nrf52840?

RE: power consumption in nrf52840?

Simonr — Tue, 28 May 2024 13:42:45 GMT

Feel free to share your solution as it may help future users with similar issues as well.

Best regards,

Simon

RE: power consumption in nrf52840?

RAGHAV_M — Tue, 28 May 2024 11:24:15 GMT

the issue got resolved. thanks for the help

RE: power consumption in nrf52840?

Simonr — Wed, 22 May 2024 12:32:19 GMT

Okay, can you please show me a picture of how the amp-meter is connected to the DK and/or custom board? Also, do you have the specs of the amp-meter? How accurate is it for example, and is there a few µA it could swing when measuring?

Best regards,

Simon

RE: power consumption in nrf52840?

RAGHAV_M — Tue, 21 May 2024 09:23:35 GMT

Hi simonr,

thanks for the reply,

I assume this means you tried with an nRF52840 DK, correct?

yes.

i am not using ppk2, i am using digital ammeter serial connection to check power consumption.

i am not using rtc so i dont think it could effect.

and i already Devicetree visual editor extension for VS code nothing is running.

RE: power consumption in nrf52840?

Simonr — Tue, 21 May 2024 06:39:50 GMT

Sorry about the late response, but there was a couple of bank holidays here in Norway, so we've not been available the last few days.

[quote user="RAGHAV_M"]but i tried in nrf52840 both showing same results[/quote]

I assume this means you tried with an nRF52840 DK, correct?

How exactly are you measuring current consumption on your end, are you using a PPK2 or some other way of measuring power? 35µA doesn't sound too bad, but it should be possible to lower the current further I believe. You can use the Devicetree visual editor extension for VS code to see if there are any peripherals or clocks still running. My guess would be that an RTC instance might be left running for some reason, but I'm not able to tell from the configs you've provided unfortunately.

The advertising and connection consumption seems about right, depending on what advertising and connection parameters are set in your application.

Best regards,

Simon

RE: power consumption in nrf52840?

RAGHAV_M — Fri, 17 May 2024 09:43:06 GMT

HI simonr,

can u provide any update regarding the query?

thank you

RE: power consumption in nrf52840?

RAGHAV_M — Thu, 16 May 2024 13:37:20 GMT

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

RE: power consumption in nrf52840?

RAGHAV_M — Thu, 16 May 2024 13:22:58 GMT

HI ,

Thanks for the reply i will check and confirm

RE: power consumption in nrf52840?

Simonr — Thu, 16 May 2024 13:20:56 GMT

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

RE: power consumption in nrf52840?

RAGHAV_M — Thu, 16 May 2024 12:24:15 GMT

Hi Simonr,

did u find any way to reduce power consumption

RE: power consumption in nrf52840?

RAGHAV_M — Wed, 15 May 2024 11:49:37 GMT

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

RE: power consumption in nrf52840?

Simonr — Wed, 15 May 2024 10:51:20 GMT

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