# 27,773 questions

4
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## app_timer / softdevice S132 / sd_app_evt_wait

Hi there,

hope you are doing fine.

I am using SDK 14.1 with SoftDevice 132 as well as a state machine framework which needs a have a function called periodically to manage events, timers, etc. I am NOT using ... (more)

17
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1
vote
1

## thingy: is there someone who used polyfill web bluetooth ?

Hi

Is there someone who used polyfill under windows to run the thingy html5 example ? ( chrome and Bluetooth work around to have the application running)

Br

Christophe

57
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1
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1

## Is nRF52840 IC Revision Engineering B 100% pin compatible to Engineering A?

Hi,

it seems there was lately a new IC revision release of the nRF52840.

Is the nRF52840 IC Revision Engineering B 100% pin compatible to Engineering A, i.e. pinning given in nRF52840 datasheet v.0.5.1 still valid ... (more)

12
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## nRF52832 Power on Reset and nRESET

in my circuit, it takes 17ms for VCC_NRF to go up from 0 to 1.7V and reach 3.0V, but nRESET PIN does NOT to go up to VCC_NRF. what is the potential cause of this problem?

here is ... (more)

13
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## Behavior when a single PPI channel triggers 2 timer tasks

nRF52832 / SDK 14.2 / SD5.1.0

There might be two configurations to setup a PPI channel to assign some peripheral event to both timer capture & clear task:

1.

nrf_drv_ppi_channel_assign(event, (uint32_t)&NRF_TIMERX->TASKS_CAPTURE[Y]);
nrf_drv_ppi_channel_fork_assign(event, (uint32_t)&NRF_TIMERX->TASKS_CLEAR ...
(more)

13
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## Where to put APP_TIMER_DEF without error or warning?

I am working on a project in Nordic SDK 8.1 that requires using a timer. I am confused where I need to define the timer though (using APP_TIMER_DEF). If I put it right after my #include statements I get ... (more)

9
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Hi,all.

I made observer with using ble_app_uart(central).

And, I transmit UUID with using uart.

Test result, I confirmed that the previous value of p_adv_report-> data was not erased.

캡처.PNG

As above, Some part don't erase.

Below ... (more)

18
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## Why ble_app_uart_c stops scanning after some time?

Hello, I am running ble_app_uart_c example on nrf52832 IC. It is connecting to its corresponding peripheral and I achieved bidirectional communication.

The problem is, if peripheral is not available for long time(4 to 5 hours), my central device stops ... (more)

9
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## Error run multi NUS

Hi all, I encountered a problem , when I connect 1 board central to 2 board peripheral via NUS . It connected and discovery success . But at

static void db_disc_handler(ble_db_discovery_evt_t * p_evt)

{

ble_nus_c_on_db_disc_evt(&m_ble_nus_c[p_evt->conn_handle], p_evt);

printf("db_disc_handler [0x%x]\r ...

(more)

52
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## Why is my service cccd_handle number wrong [closed]

Hello.

Nordic Team.

I add for ble Service and i select my service notify enable

I want receive my service number, but service number is different.

Add for my source code and I looking for example PCA10040 HRS service.

The ... (more)

64
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2

## Why is my service cccd_handle number difference. [closed]

Hello,

Nordic Team.

I don't understand 'ecg cccd_handle number ' 'p_evt_write->handle number' difference.

I add for ECG Service on my bluetooth profile.

ECG Service in ecg data char 'notification on' but on_write in function cccd_handle number is difference.

But ... (more)

7
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## Regarding MAX30101

I want to access max30101 through nrf51422. Is their any library available for that? if you provide that then it will be a great help.

28
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## Why not control spi nrf_drv_spi_transfer ?

Hello

Nordic Team.

I controling nrf spi.

testing for example nrfSDK14.0.0\example\peripheral\spi\pca10040\blank\arm5_no_packs\spi_pca10040

/**
* Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
*
*
* Redistribution and use in source and binary forms, with or ...
(more)

15
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## gyroscope services

hi team, i am using nrf52840. is there any hidden services placed in nrf connect app android for gyroscope or we want to create our own services. and also one doubt wat is the twi_scl and twi_sda pin for pca ... (more)

31
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2

## When ble_app_uart_c example enters sleep mode?

Hello, In ble_app_uart_c example, I can see sleep_mode_enter() function. I would like to know when this function is called and what it does. I don't want my IC to get into sleep mode. So, removing this function will do ... (more)

8
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## nrf_drv_pwm_sequence_update

when i use nrf_drv_pwm_sequence_update/nrf_drv_pwm_simple_playback multiple ,it dont work well

85
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1

## Use arduino primo to measure battery voltage level

Hi,

I'm develope some sensor with arduino primo, which use nrf52832 as a primary mcu. I want to measure battery voltage level,and i find some example like: https://devzone.nordicsemi.com/questi...

but i confused with which SDK ... (more)

99
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1

## nRF52832 P0.10 GPIO Voltage drop

Hi all,

I try to control IC by nRF52832.

[My Application]
・Supply 2.5V to nRF52832 and IC.
・Connect P0.10 to IRQ(IC)

[I did these setting]
・Define "CONFIG_NFCT_PINS_AS_GPIOS"
・P0.10 : INPUT, PULL DOWN

But, the IC's IRQ ... (more)

79
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2

## Eclipse build failed for Blinky w/ SDK 14 - Make Error 2

Hello!

I experienced the same errors as here and here when following the Eclipse gcc tutorial (7), but the solutions did not solve my problem.

I suspect this is related to my using SDK 14 instead of 13, as the ... (more)

41
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## ble_uart example with custom uart ISR

while the ble_uart example is a great resource of information, i have a need to completely separate the ble nus data in / out from the hw uart code

using sdk 14.2.0

i was able to put my own ... (more)

152
views
9
2

## SEGGER Embedded Studio can't find softdevice binary

When I try to build and run any example from the nRF5 SDK, it can compile successfully. But when loading to the eval kit, it can't find the 's140_nrf52840_5.0.0-2_alpha_softdevice.hex'.

(more)

17
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## nrf52840 availability USA 12-12-17

Hello, we would like to consider this chip for a product, but I have been waiting for this to be on sale for purchase since February 2017. It's still 12 weeks out and it's nearly the end of ... (more)

13
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## Board is not defined

Hello everyone, I want to run project ble_uart on NRF52832 in Keil. At the beginning of the main.c I add

# define BOARD_NRF6310

But get error C:\Keil_v5\ARM\PACK\NordicSemiconductor\nRF_Examples\11.0.0-2.alpha\bsp\boards.h(44 ... (more)

20
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## S132 5.1.0 excessive RAM usage

From the S132 5.1.0 specification, I expect that its RAM usage should be only 0x1228 bytes plus ATTR_TAB_SIZE. However, when I compile two of the example projects using IAR, I'm seeing an APP_RAM_BASE higher than expected, in ... (more)

10
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## SDK 12.3.0 - connection parameter config got fatal error

Hi there,

Based on apple recommendation, I've chosen the next connection parameter set (and tested the parameter set works on other platform such as TI and Dialogue chip):

140 #define MIN_CONN_INTERVAL MSEC_TO_UNITS(1979, UNIT_1_25_MS) /**< Minimum acceptable connection interval (1 ... (more)

32
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1
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2

## What is the precision on timers?

We have built and run the code in examples->peripherals->timer in nRF5_SDK_12.3.0_d7731ad on 4 different Nordic DK nRF51 development boards. The timer period is 5 msec. We commented out the LED initialization and toggling. In the ISR ... (more)

15
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## inner and outer application timers, is it a problem?

Hi everyone,

I have one problem with the application timer. When I change the state of characteristic to the value of 1, the following code is executed:

   err_code = app_timer_stop(m_mass_timer_id);
err_code = app_timer_start(m_mass_timer_id, MASS_MEAS_100MS_INTERVAL ,NULL);
APP_ERROR_CHECK ...
(more)

52
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2
2

## Secure DFU Bootloader debugging for nRF51822_xxAA

I am using example DFU project (bootloader_secure) from SDK (12.3). Chip 51822QFAA. My problem is that I cannot start to debug session in Keil5. Use JLink. I can program target(through J-Link interface) and start the application, but I ... (more)

19
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## NRFUtil, Python3 support?

Are there any plans to support python3 for nrfutil? Python 2 will no longer recieve updates after 2020, and many packages are moving to python3 only.

29
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## SPIS communication corrupted

Hey,

I'm using nRF as a SPI slave with a Raspberry Pi. I'm seeing that even at ~3MHz SPI frequency, my first byte transferred gets corrupted. I have a test setup where I'm sending 10 bytes (data ... (more)

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## Recent questions

• ### app_timer / softdevice S132 / sd_app_evt_wait

Posted 2017-12-13 10:01:18 by Mark.Thielen
• ### nRF52832 Power on Reset and nRESET

Posted 2017-12-13 09:03:45 by ogura
• ### Behavior when a single PPI channel triggers 2 timer tasks

Posted 2017-12-13 08:30:21 by XavierYin
• ### Where to put APP_TIMER_DEF without error or warning?

Posted 2017-12-13 08:29:12 by tyler