# 18 questions

Tagged
• x
41
views
1
vote
1

Hi,

Most of the sections of my application are functioning as I want it to, except these two (step 3 and step 4).

Application:

1. Connect device (with Auto connect enabled)
2. Transfer data using nus service from peripheral to central device ...
(more)

143
views
no
1

## 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)

76
views
1
vote
1

## Minimum pulse length to detect low level with GPIO SENSE for nRF52

Hi all

What is the minimum required length of a LOW pulse to be detected by the nRF52832 via GPIO SENSE mechanism? I couldn't find it in the product specification.

I want to wakeup the nRF with a LOW ... (more)

583
views
no
2

## Configuration of GPIO to wake up from System Off

Hi,

I am working with a nrf51822 and I have seen that the way to wake up from System Off mode is by a GPIO interrupt. I wanted to know if it is needed to configure previously the GPIO pin ... (more)

413
views
1
vote
1

## 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)

384
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2
1

## Set 2 pins to wakeup from System ON and OFF, and know which pin was pressed

I want to configure two pins to be able to wake up both from System ON and OFF and know which pin was pressed

is it possible?

125
views
no
no

## 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)

365
views
1
vote
1

## Problem with emulated System OFF mode with NRF52

Hi all

I have two questions/problems regarding the emulated System OFF mode with the NRF52832 and the SoftDevice S132 V2.0.1:

1. According to this thread, an infinite loop should be placed after the function call sd_power_system_off() when debugging ...
(more)

114
views
no
1

## "Switching off" nRF51 beacon

I'm using a nRF51 beacon as a receiver that produces a pulse when it receives a byte from the transmitter. The code is based on the ble_app_uart example. And I set the connection interval to minimum to minimise the ... (more)

151
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no
1

## do not enter the system off mode in hrs

I'm using [nRF52_SDK_0.9.2] and original module. As a tool, I use the keil.

"NRF_POWER-> SYSTEMOFF = 1;" in the SDK example hrs also written, does not enter the system off mode (current value does not decrease).Written location ... (more)

476
views
1
vote
1

## Why GPIO can be used as power supply pin?

Hi all,

I am new in nRF51822. Today I am doing experiment using GPIO and radio transmission. I wrote a very simple code as below:

int main(void) {

init_clock();
transmit();
nrf_gpio_cfg_sense_input(8, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_SENSE_HIGH);
NRF_POWER->SYSTEMOFF = 1;


}

The first ... (more)

622
views
no
1

## nRF51822 with 32MHz crystal in system OFF mode

Hi all

We use an external 32MHz crystal for the nRF51822 and set the register NRF_CLOCK->XTALFREQ to 0xFFFFFF00 according the reference manual V3.0, chapter 13.3. Afterwards the HFCLK is started and we wait for the corresponding event ... (more)

693
views
2
1

## No GPIO wakeup from SYSTEM OFF state

We have an nRF51822-based product that goes the SYSTEM OFF in certain situations. We wake up with the DETECT signal from a pin which we set to sensing just before calling sd_power_system_off() The code is really trivial:

...
nrf_gpio_cfg_sense_input(WAKEUP_PIN, NRF_GPIO_PIN_PULLUP ...
(more)

1k
views
1
vote
1

## Configure wake up behavior from system off with app_button

I'm using the APP_BUTTON_INIT-Function to register a button at the GPIOTE-System. This works great while running normally, e.g. I can react on debounced button_down or button_release events.

Magically this also works for waking from sd_power_system_off() with a rising ... (more)

451
views
1
vote
1

## how to wake up from system off without reseting a variable

Hi,

On my ble application, I want to keep after wake up reset the previous value of a variable, I tried using sd_power_ramon_set(0x000f000f) to keep on all ram partitions when in system off mode but it didn't worked ... (more)

787
views
1
vote
1

## Wakeup system after sd_system_power_off

I used sd_system_power_off to enter to system off mode, now I want to wake up my system and reset it when a button is pressed, how should I do that

Thank you

1k
views
7
4

## System Off [closed]

Hi,

Can you please tell me how can I put the nRF51822 in System Off mode?

Thank you.

Edit: Format

904
views
5
1

## Can I maintain a timer active during off (sleep) state in nRF51822? [closed]

Hi all,

I'm using the nRF51822-EK (PCA10001) and I'm going to develop a bluetooth cadence (and speed) sensor for MTBs. I desire low power consumption and i though to put the nRF in "system off mode" during inactivity ... (more)

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