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52
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2
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Last activity 2017-12-12 13:10:36 +0200 by Torbjørn Øvrebekk

Do the GPIO pins on the nrf52840 float during sleep? Or are they high/low?

Like it says in the title. I'm working on an embedded application where lifetime is pretty important, so I'm trying to get power consumption down as low as possible. I don't want current leaking through my GPIO ... (more)

103
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no
votes
1
answer
Last activity 2017-11-21 14:38:10 +0200 by Martin Børs-Lind flag of Norway

Shall i use Doubler circuit using MCP1640 with single AA battery power supply for nRF52832?

Hello Sir,

I have developed small and compact product using nRF52832 Soc. Due to size limitation and device is portable. I have attached snap shot of power supply circuit as per this circuit this switch is use only for ON ... (more)

486
views
no
votes
4
answers
Last activity 2017-11-14 09:39:53 +0200 by zp

In sleep mode,How much is the power consumption of nrf51802?

no interrupt,minimum value,nrf1802,

92
views
no
votes
1
answer
Last activity 2017-11-10 11:26:14 +0200 by Jørgen Holmefjord flag of Norway

nrf52832 sleep mode power large [closed]

Hi: I am using SDK14.0 S132 for nrf52832 , i found it's sleep mode power comsumption large than 5mA . I am using internal LDO and external power is 3.7V li-battery cross a diode to reduce Vottage to 3 ... (more)

48
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2
votes
1
answer
Last activity 2017-10-27 10:58:01 +0200 by Hung Bui

[SDK Mesh 0.9.2 Alpha] [nRF52832] Is it possible to sleep/reconnect without repeated provisioning?

I want to use several sensors that makes a measurement send the data to server (same as provisioner) and fall asleep. Wake up after 20 minutes and process repeats. Does all sensors need to be provisioned again by provisioner after ... (more)

117
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no
votes
1
answer
Last activity 2017-10-12 08:16:16 +0200 by endnode

RTC function using sleep mode

Im working on 14.0 and s132 and work inside ble_uart code...i was add rtc inside that code sucsessfully but now.. when device goes to sleep so rtc interrupt handler function not calling stop... so, can i use rtc ... (more)

47
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1
vote
1
answer
Last activity 2017-10-11 22:25:59 +0200 by endnode

where is the "nRF5 Series User Specification" document?

I have been trying to find a document referenced here 1.

The reference reads as follows:

For more information on both modes, see sd_app_evt_wait and the nRF5 Series User Specification (Section: POWER - Power control).

Does anyone have a link to ... (more)

111
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1
vote
1
answer
Last activity 2017-10-05 09:40:17 +0200 by Bjørn Kvaale

How to bring micro controller out of sleep mode after a certain amount of ticks on a crystal?

I am writing code that runs on a NRF51822 (to be less specific it runs on a Red Bear Lab BLE Nano). The board has a 32.768khz crystal on it that I want to use to wake up the ... (more)

145
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2
votes
1
answer
Last activity 2017-09-05 21:03:27 +0200 by Cole

why does nrf52832 ble peripheral device reset after advertising timeout?

after the advertising timeout occurs the board goes into sleep mode and then immediately runs from the top of the main function. I know that a pin state change can wake up the device. Is there any other way that ... (more)

183
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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)

506
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no
votes
2
answers
Last activity 2017-08-23 14:42:41 +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)

341
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no
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no
answers
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)

51
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no
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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)

196
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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)

89
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)

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?

161
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no
votes
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)

311
views
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)

123
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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)

109
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no
votes
no
answers
Last activity 2017-04-14 23:12:54 +0100 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)

825
views
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)

443
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)

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)

287
views
1
vote
1
answer
Last activity 2017-02-23 10:00:23 +0100 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)

210
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)

1k
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)

241
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)

309
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)

664
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)

103
views
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)

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