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Last activity 2017-08-16 10:51:03 +0200 by oneguy

Sleep / Wakeup tutorial

Hi,

We would like to use the nRF52 in the following way:

  • BLE communication via S132
  • button / IRQ to wakeup nRF52 application
  • put nRF52 to sleep after BLE communication AND application have completed their respective tasks.

Is there a tutorial ... (more)

24
views
no
votes
no
answers
Last activity 2017-08-12 12:14:31 +0200 by Ravi Upadhyaya

328P does not wakeup when PRX IRQ is asserted by NRF24L01

Has any-one been successful waking up a sleeping 328P via a NRF24L01 PRX IRQ interrupt?? My scenario is as below. Establishing a two way communication between two arduino boards. One is a central-panel and the other is a node with ... (more)

117
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no
votes
1
answer
Last activity 2017-06-29 13:22:58 +0200 by Gordon

High power consumption after disconnect

Hi,

I've just hit a strange issue with SDK 12.1 on nRF52832.

Usually on BLE_GAP_EVT_DISCONNECTED, sd_ble_gap_adv_start gets called to start advertising and everything's great.

However, if I don't call sd_ble_gap_adv_start, advertising stops (as you'd expect ... (more)

65
views
1
vote
1
answer
Last activity 2017-06-23 13:58:18 +0200 by endnode

Putting the nRF51-DK to sleep periodically

Hi,

I am using the capacitive sensing driver example given in the SDK(version 12.3) and it works fine. I want to extend the code to ensure that the SoC goes to sleep for 60 seconds and then wakes ... (more)

143
views
no
votes
1
answer
Last activity 2017-06-19 15:55:44 +0200 by Stian flag of Norway

nrf52840 Power Consumption

Hi There,

I am doing current measurements on the nrf52840 in sleep mode with no RAM retention and I am getting different values based on how I take the measurements. Please see the various methods and resulted below.

  1. Using an ...

(more)

13k
views
6
votes
6
answers
Last activity 2017-06-11 00:16:25 +0200 by Gabor Paller

Why does my nRF51822 consume > 1 mA in sleep?

No matter what sleep mode I put my nRF51822 in (system on, idle, system-off), it seems that the base current is above 1 mA. Is this how it's supposed to be?

92
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no
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no
answers
Last activity 2017-05-09 13:50:17 +0200 by tomkawal flag of United Kingdom

Low power ESB Tx nRF52832 nrf_pwr_mgmt_run

Using existing examples in SDK13, I prepared ADC sampling app which works fine in ESB TX mode. Works well sending frames at 10ksps, and I can also put it to 'standby mode' by remote command from RX, when it wakes ... (more)

169
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1
vote
1
answer
Last activity 2017-04-28 23:25:39 +0200 by Sal

button interrupt with long push

Hello, I am using nrf52832 custom board, with SDK 11.0.0 and s132_nrf52_2.0.0, and trying to create an interrupt event on wake up from system off by pressing BSP_BUTTON_0 (only one button available). Following the nrf51-powerdown examples ... (more)

92
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no
votes
2
answers
Last activity 2017-04-21 14:36:30 +0200 by Constantin

sleep mode during multiprotocol timeslot API

Hi,

I've just started to implement the example

https://github.com/NordicSemiconducto...

for the nrf52. And it is now running so I can send and receive stuff via BLE and at the same time send something via ESB to ... (more)

50
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no
votes
no
answers
Last activity 2017-04-14 23:12:54 +0200 by Fabien Comte flag of France

SD card and sleep

Hello,

I use SDK 13 on nRF52832 with a SD card (nRF port of fatfs lib).

I have a long sleep and i want to minimise current.

With SD card, it's okay i switch off SD card power, set ... (more)

372
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no
votes
no
answers
Last activity 2017-03-30 04:25:30 +0200 by Stanley

nRF52832 current consumption in sleep mode

Hi,

I am using the PCA10040 DK (v1.1.1) to measure the current consumption in sleep mode and the current is about 200 uA. (3V, DCDC Enable)

Following is the code, it's really simple. For current leakage, I ... (more)

242
views
4
votes
1
answer
Last activity 2017-02-28 23:14:11 +0200 by Roger Clark

How to wake up from sleep mode from a phone via BLE

Hello

I want to know if we can wake up nrf52832 in sleep mode , from a command through an application on a phone via BLE. If its possible can someone please guide me to the steps or the link where ... (more)

838
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)

242
views
1
vote
1
answer
Last activity 2017-02-23 10:00:23 +0200 by Sigurd flag of Norway

GPIO state during deepest sleep mode

Hi, Do the nRF52 GPIOs retain their pullup/down or drive characteristics when in its deepest sleep mode? VCC is still applied, but otherwise, the chip is to consume a minimum of power, waiting for a wakeup on another GPIO ... (more)

143
views
1
vote
1
answer
Last activity 2017-01-30 09:30:18 +0200 by Aryan flag of Norway

PORT event not waking up with interrupts disabled

Hi,

I'm building a low power application utilizing a MEMS accelerometer providing a data ready signal with configurable intervals. The intent is to use this signal as a wakeup from system_on sleep. The low power execution is in a ... (more)

533
views
1
vote
1
answer
Last activity 2017-01-27 10:52:26 +0200 by _Dejan_

Deep Sleep with RTC Wakeup

Hi, Im new here and microcontroller programming... I curently waiting nrf52840 PDK so Im only quick read SDK and documentation... Before Im program only devices with .NET Micro Framework and make a lot of applications for computers, but this is ... (more)

180
views
no
votes
1
answer
Last activity 2017-01-26 14:58:30 +0200 by Jørgen Holmefjord flag of Norway

nrf51822 mbed Low Power, How to achieve?

Hi,

I hope you are doing well. I am working on nrf51822 project. I want the nrf51822 to advertise for 5 secs and then sleep for say 30 mins or an hour and then wake up and advertise for 5 ... (more)

228
views
no
votes
1
answer
Last activity 2017-01-05 15:07:16 +0200 by Stian flag of Norway

40uA on Power OFF nrf52832 s223

Hello, My problem is to much current c.a. 40uA in POWER OFF mode. Below attach code:

void power_down()
{
    nrf_gpio_pin_clear(22);         // Wylacz mostek tensometryczny
    nrf_delay_ms(10);
    nrf_gpio_pin_clear(20);         // Wylacz LDO 2V5
    nrf_delay_ms(10);

    timer_disable();
    saadc_sampling_event_disable();
    sd_clock_hfclk_release();

    // Disable TWI ready for ...
(more)

413
views
1
vote
1
answer
Last activity 2016-11-07 16:25:51 +0200 by Petter Myhre flag of Norway

nRF51822 Sleep modes

Hi All,

My question is about available sleep modes in nRF51822.

As I can find in nRF51 Series Reference Manual, and Product Specification documents, nRF51822 chip has two essential sleep modes, System-ON and System-OFF. Where the System-OFF is the deepest ... (more)

85
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no
votes
1
answer
Last activity 2016-10-26 13:27:42 +0200 by awneil

Need NRF8001 to advertise while Microcontroller asleep.

I'm using an NRF8001 with an ATMEL ATMEGA 328P (the microcontroller from an Arduino). I need the microcontroller to go to sleep, but still allow the BLE chip to advertise and wake the microcontroller upon connection. It seems as ... (more)

346
views
no
votes
1
answer
Last activity 2016-10-24 19:25:18 +0200 by Dave_Avatech

waking from sleep

Hi,

I am having some trouble getting the nrf51422 (running the s130 soft device) to wake up after entering sleep mode. I have successfully entered sleep mode using NRF_POWER->SYSTEMOFF = 1, and sd_power_system_off() (both seem to be effective). However, when ... (more)

125
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no
votes
no
answers
Last activity 2016-10-17 02:52:54 +0200 by uba

from system on to system off

I am using the nRF5_SDK_11.0.0.

I want to state of the system off sleep after entering system on sleep.

For example, from the state of system on sleep, it becomes system off sleep after 5 seconds.

However, it ... (more)

238
views
no
votes
1
answer
Last activity 2016-10-04 15:40:52 +0200 by Stefan Birnir Sverrisson flag of Iceland

System On Wakeup on Gpio High Current Consumption

Hi,

I loaded the code available at github for system on wakeup on gpio current and measured the current in low power mode by connecting a multimeter to a nrf51 dk.

The value i am getting is 25 ua. Can ... (more)

79
views
no
votes
no
answers
Last activity 2016-09-14 12:52:11 +0200 by 1_andi

Don't stay in sleep mode after switch off voltage [closed]

Hi,

for our prototyp we use a NRF52. When i flash the device, it will always be go in sleep mode after a duration of time and stay in there.

Is there an interrupt which wake it up?

The workaround ... (more)

1k
views
3
votes
1
answer
Last activity 2016-09-02 10:33:28 +0200 by Bjørn Spockeli flag of Norway

how much current consumption nRF52 in sleep mode and RTC on?

how much current consumption nRF52 in sleep mode and RTC on?

228
views
no
votes
1
answer
Last activity 2016-08-08 14:20:21 +0200 by Øyvind Karlsen flag of Norway

System power off current consumption in nrf51422

Hi,

We have built a BLE product using nordic nrf51422. When system power off mode is enabled, the current consumption is coming to be around 16 uA. In our application, we expect leakage current from different IC's to be ... (more)

110
views
no
votes
no
answers
Last activity 2016-08-04 14:03:57 +0200 by Martin Peters

sleep after disconnect

Hi

what is the best way to implement a sleep after disconnect? We are using a custom board and I implemented it this way:

on connect : turn advertisement off on disconnect : event set WDT interval to longer interval, go to ... (more)

795
views
no
votes
1
answer
Last activity 2016-07-06 16:14:06 +0200 by Stefan Birnir Sverrisson flag of Iceland

RTC interrupt does not wake up nRF52

I am having issues waking up nRF52 with s132 using the RTC interrupt. The same code is used on nRF51 with s130 and does not show this behavior.

The RTC is configured and the interrupts are fired and handled as ... (more)

1k
views
1
vote
no
answers
Last activity 2016-07-02 08:35:29 +0200 by Ankush

large current consumption in nrf52 in sleep mode

Hi,

I am using BMD300 rigado board having nrf52. In my application i am tracking the ADXL362 accelerometer's motion.For this, I am combining SPI, UART(for displaying data in terminal) and some GPIO pins(Buttons and LEDs).

After ... (more)

72
views
no
votes
no
answers
Last activity 2016-06-06 17:40:36 +0200 by Luca122131 flag of Italy

nRF51422 can not sleep after flash erasing (s310)

I'm using the softdevice S310 on nRF51422 and when the softdevice is enable and I erase flash, the device won't go to sleep.

My code implementation is like as below:

int main(void)
{
  ANT_init(); //into this function softdevice ...
(more)

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