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Last activity 2018-01-12 15:00:19 +0200 by aircheese

Are TWI manager implemented low power features?

My environment is: SDK14.1 + SD132 V5.0 + NRF52832

2 sensors(MPU9250 + LPS22HB) 1 battery gas meter (LTC2942) are mounted on TWI ( +1mA)

SPI to spi flash. (+1mA) and UART for shell. (+1mA)

I used both manager. After putting all ... (more)

28
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no
votes
1
answer
Last activity 2018-01-04 09:21:45 +0100 by Jørgen Holmefjord flag of Norway

power profiler kit vs power analyzer

What is difference between power anaylzer and power prfiler kit? Power profiler kit gives same accuracy of power consumption as power analyzer?

65
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3
votes
1
answer
Last activity 2018-01-03 17:15:36 +0200 by Mason

Can't put Adafruit NRF52 Feather board into Low Power

I've been working with an Adafruit NRF52 Feather board for the last week, and have been struggling to get the board to go into a low power mode. At the moment, I am working within the Arduino IDE. Typically ... (more)

92
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no
votes
1
answer
Last activity 2017-12-30 02:29:06 +0200 by aguedob

Newbie question with iBeacon Station NRF51822. Power consumption

Hi all,

I've bought an iBeacon Station NRF51822 like this one (http://linksprite.com/wiki/index.php5...). My idea is using it as a temp sensor for my smart home installation. It works fine but the battery is drained ... (more)

61
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1
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no
answers
Last activity 2017-12-27 15:50:11 +0200 by vishal

Is it ok doubler circuit for powering nRF52832 custom board

Hello Everyone,

I have developed my application using BLE for connect android mobile. I have design complete PCB using your reference design. But i have littele confused in power supply schematic because i have use MCP1640 doubler IC, and use ... (more)

265
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2
votes
1
answer
Last activity 2017-12-24 17:27:23 +0200 by endnode

Is heart rate service the correct thing to use for power consumption efficiency?

I am developing some firmware using SDK 8.1 where power consumption is absolutely critical. The firmware will make a ble connection between the central and peripheral device and after that does almost nothing except for every couple months the ... (more)

116
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no
votes
1
answer
Last activity 2017-12-18 10:20:26 +0200 by adrisecmotic

Low power problem with GPIO, I2C and SPI in nrf52

Hi all, we have a problem with a project based in nrf52832 and a custom board. The project is based in "ble_app_uart" example, and also we have the following sensors:

Accelerometer gyroscope and magnetometer (BMX055 from Bosch: datasheet) Ultraviolet sensor ... (more)

69
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no
votes
1
answer
Last activity 2017-11-01 23:24:12 +0200 by Kishan Patel

Longer Connection Interval VS Slave Latency [closed]

My question is related to peripheral device only. I have implemented an auto connection interval negotiation algorithm which works as expected and negotiates connection interval with central device (usually android phone) based on packet queue counter. But as expected, it ... (more)

122
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no
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1
answer
Last activity 2017-10-26 15:15:23 +0200 by Sigurd flag of Norway

nRF 51822 Low power mode

Hi All,

I'm new to nrf51822. I'm developing a battery powered device using the Nordic ble_app_uart_s110_pca10028 peripheral example program. I'm glad to inform you my core program is working successfully. But now i'm facing a problem ... (more)

174
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no
votes
1
answer
Last activity 2017-10-16 17:03:10 +0200 by Jørgen Holmefjord flag of Norway

Low Power SAADC

Hi everyone,

I am having problems in getting the low power mode in SAADC to work. If I enable it in the config file then the ADC doesn't run anymore.( Blank in the RTT viewer) I have four channels ... (more)

194
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1
vote
1
answer
Last activity 2017-09-27 10:01:26 +0100 by JoseSecmotic2

Low power with peripherals, I2C and SPI in nrf52

Hi everybody, We are using a custom board based in nrf52832, BLE and a custom antenna, and we are finding some issues trying to use the device in low power mode. We are using I2C and SPI communications and we ... (more)

65
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1
vote
1
answer
Last activity 2017-09-19 02:37:41 +0100 by RK flag of Singapore

New to NRF51422

I am developing a product where I need to read a signal from an SPI ADC and send remotely to a receiver. This will be powered of a coin cell. I see that the NRF51422 is low power, but I ... (more)

234
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1
vote
1
answer
Last activity 2017-09-05 09:22:52 +0200 by Jørgen Holmefjord flag of Norway

Using ADC with Sleep Mode

I'm relatively new to development on the nRF52832 and I'm trying to find information on how to use the sleep mode with the SAADC.

Goal: The micro should be in sleep mode until an event is triggered - this ... (more)

49
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no
votes
1
answer
Last activity 2017-08-22 08:43:15 +0200 by Bjørn Spockeli flag of Norway

Disable enhanced power control

Hello,

Is there any way to disable the "Enhanced Power Control" feature of the BLE standard? I am working with nRF51-DK in the connection mode and I need fixed transmit power regardless of the distance between my Bluetooth devices. If ... (more)

89
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no
votes
2
answers
Last activity 2017-08-01 15:53:56 +0200 by Sigurd flag of Norway

RTC0 AND RTC1

hi , I have a question about rtc.In my project ,I use rtc1 for app timer and rct0 for low_power_pwm.The problem is that I dont't have any idear to enable rtc0 instead of rtc1 in the low_power_pwm .Thank ... (more)

312
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no
votes
1
answer
Last activity 2017-07-18 10:23:54 +0200 by endnode

Wakeup and Sleep modes internal interrupt

Hello Guys,

I'm working in a project and I wanna turn off the radio "ble" and go to sleep, deep sleep to save the power, the current consumption while it's connected is 0.4mA which is too much ... (more)

28
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no
votes
1
answer
Last activity 2017-07-03 11:15:08 +0100 by Sigurd flag of Norway

low power in sdk9.0

hello everyone,in my code, SDK9.0 uart ,please tell me the reson if you the book of knowledge

static void timers_init(void)
{
    uint32_t err_code;

    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
}

int main(void)
{
    SEGGER_RTT_printf(0,"init\r\n");
    timers_init();
    ble_stack_init ...
(more)

273
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1
vote
1
answer
Last activity 2017-05-16 09:44:55 +0200 by Sigurd flag of Norway

current consumption of nRF52832

Hi, I am testing the current comsumption of nRF52832 using the original code of "nRF5_SDK_13.0.0_04a0bfd\examples\ble_peripheral\ble_app_beacon ". The peak TX current I measured was about 12.5mA. It doesn't match the results in https://devzone.nordicsemi ... (more)

163
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no
votes
2
answers
Last activity 2017-05-15 14:25:28 +0200 by Hung Bui

Power consumption around 2.2mA even in idle state

I am using proximity profile using NRF52 DK.When i started measuring power consumption it is not at all coming less than 2mA.

In order to make as low power ,is there any settings i need to adjust.I am ... (more)

573
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1
vote
2
answers
Last activity 2017-04-03 11:32:44 +0200 by PrithviRaj Narendra flag of India

SAADC low power scan mode

Greetings,

I have a setup where I have a periodic single channel low power SAADC implementation. In this the configuration is

  • A single SAADC channel is initialized (10 us acquisition time, differential, gain 4, 12 bit, internal reference)
  • RESULT.MAXCNT ...
(more)

74
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1
vote
2
answers
Last activity 2017-03-31 12:52:00 +0200 by aras flag of Canada

Concurrent peripheral and advertising s110

Our nRF51822, S110 device uses concurrent advertising (iBeacons) when connected to the central. Our customer would like to have a variable tx power on the advertising packets only. Is there any way we could do this?

64
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no
votes
1
answer
Last activity 2017-03-21 17:14:23 +0100 by Stian flag of Norway

about detailed description for 9 states of peripheral connection event

image description

dear friends , within a peripheral connection event, 9 states is identified, as it is shown in the pic above(from s132 document). Can i get a detailed description about what work is done during each state ? for example,a detailed ... (more)

1k
views
1
vote
1
answer
Last activity 2017-02-23 20:39:13 +0200 by Tamás

NRF52 Sleep Mode and BLE Advertising MBED

Hi all,

first of all I'm new to NRF and BLE applications so I'm truly sorry if some of my questions are very basic and if answer to some of them is already posted somewhere. I probably should ... (more)

94
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4
votes
2
answers
Last activity 2017-02-02 11:29:13 +0200 by Stian flag of Norway

Current consumption on different BLE configurations.

Hi,

I have my 2 nRF51 running with S130 v2.0.1, one is the central and the other peripheral. I am transmitting audio data between both and want to reduce the current consumption to the maximum of my ability ... (more)

161
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no
votes
3
answers
Last activity 2017-01-30 15:07:13 +0200 by artis

Low power problem

Hi,

I am having some trouble getting my design into low power.

I have a BLE central application using an nRF51822. I am using the power on sleep mode by calling sd_app_evt_wait() from an eternal loop in main(). I am ... (more)

222
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no
votes
no
answers
Last activity 2017-01-08 17:14:02 +0200 by maibi

nrf51822 power consumption problem

Dear Everyone.

Hi, I develop nrf51822 with DK PCA10028. I have been optimizing the power consumption to some extent. But now I am very confused.

I use S110 softdevice 8.0.0 and have a single uart which usually leave ... (more)

70
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no
votes
no
answers
Last activity 2017-01-07 04:37:12 +0200 by maibi

Is power consumption normal? I'm confused. [closed]

Dear Everyone.

Hi, I develop nrf51822 with DK PCA10028. I have been optimizing the power consumption to some extent. But now I am very confused.

I use S110 softdevice 8.0.0 and have a single uart, but usually leave ... (more)

247
views
1
vote
1
answer
Last activity 2016-11-24 16:48:50 +0200 by Sigurd flag of Norway

Power Consumption of a Central & Peripheral device

I would like to ask how to calculate the current consumption of a device with both Central and Peripheral role?

292
views
2
votes
1
answer
Last activity 2016-10-28 13:49:46 +0200 by Stian flag of Norway

is spi in nrf52832 consume large current ?

i measured the current of nrf52 dk board with the spi example (examples\peripheral\spi\pca10040). the result shows that it consumed about 6 mA !!! i read the nrf52 datasheet, spi consumes up to 50 uA. below is the example ... (more)

1k
views
no
votes
1
answer
Last activity 2016-10-14 11:14:14 +0100 by Stefan Birnir Sverrisson flag of Iceland

how to enter the low power mode and continue to advertise?

Hello,everyone. Now i have the board nrf52832 and i want it to enter the low-power mode but keep the the advertising. Now the measured current is 160uA, I think there should be a problem, here is the code. How ... (more)

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