# 15,435 questions

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## How to get APP_ERROR_CHECK(err_code) to print out error msg instead of reset?

I am using SDK_11 s130 on nrf51-dk. When err_code is any value other than NRF_SUCCESS, APP_ERROR_CHECK(err_code) will cause nRF51-dk board to reset. How can one get APP_ERROR_CHECK(err_code) to fail gracefully without causing reset and print out the error ... (more)

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## How to know which line cause APP_ERROR_CHECK(err_code) to fail?

I am using SDK_11 s130. I see APP_ERROR_CHECK(err_code) being used throughout the SDK examples. When err_code is any value other than NRF_SUCCESS, the nRF51-dk board will reset. However, I do not have any idea which line of code caused ... (more)

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## Problem with UART DFU

Hi,

I'm trying to test the DFU over HCI included in the SDK examples but I can't make it work. This is all the information of the environment I'm using:

• SDK: 10.0.0
• Board: nRF51-DK
• Softdevice ...
(more)

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## Men's Sunglasses For Fashion And Function

Oakley shades are one of several most popular and most highly regarded eyewear brandnames. It had been founded within 1975 also, since after that spent a money and amount your own time in their own research. And what's the ... (more)

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## windows 7 activator 2015

<a href="http://Www.Windows7Loaderdaz.Weebly.com/">windows 7 activator crack</a><br><br>Hey there guys windows 7 activator just released and we want to show it with you. With it it is possible to activate windows several without ... (more)

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## GPIOTE manual clear

Hello,

I am working with the GPIOTE library to get a GPIOTE_IRQ from a peripheral.

I have several questions regarding the library and how IRQ works.

1.How do I clear the event for the gpiote input. I know that ... (more)

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## Best scanning rate to avoid phone's battery drain in background mode.

Hi guys

I am planning to develop a beacon app, but I am not sure what would be the minimum scanning interval in order to keep the phone's battery drain on a fairly good level. The app must keep ... (more)

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## TX_COMPLETE on s110

Hello Nordic! So I need to know whena packet has finished being transmitted, and to do so I am trying to use the BLE event callback, as shown bellow.

APP_ERROR_CHECK(softdevice_ble_evt_handler_set(ble_on_evt));

...

static void ble_on_evt(ble_evt_t * p_ble_evt){
log_rtt_printf(0, "ble_on_evt ...
(more)

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## Error: BTLE_CONN_FAILED_TO_BE_ESTABLISHED

I have been following the advertising tutorial and decided to start my own application using nordics git repo as a reference. After a few debug sessions I found that I needed to update my RAM settings. Everything is up and ... (more)

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## Connecting nRF52 with NXP 7120

I am trying to connect nRF52 with 7120 and create a NFC card reader , is this a solution and power efficient solution . I will interface through I2C , is there a example which i can reference . I have both the dev ... (more)

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## sysclk not showing up on GPIO pin

I am trying to probe sysclk signal on one of the unused GPIO pins on a nRF52 board. I modified the ble_app_template example provided in SDK 11.0.0 and added a sysclk function to see the sysclk signal on ... (more)

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## nRF52: Write/erase flash cycles confusion

Hi,

I have a small question regarding flash write/erase cycles and I was unable to find a clear answer.

I can see in NRF52 specs:

• Flash write/erase cycles: 10 000.
• Amount of writes allowed in a block between ...
(more)

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## Current Measurement methods nrf52

Hello everyone, I want to measure Low power mode current consumption in nRF52 DK,but I dont have accurate CRO to measure in micro Amperes, therefore I would like to know if there are any other alternative method to measure ... (more)

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## app_timer and nrf_esb

Hi

there I'm having a problem in compiling an application using nrf_esb and app_timer.

./nRF5_SDK/components/properitary_rf/esb/nrf_esb.c:900: multiple definition of SWI0_IRQHandler'
_build/app_timer.o: ./nRF5_SDK/components/libraries/timer/app_timer.c:947: first defined here


Any ... (more)

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## UART Communication error hangs RX/TX nRF52

Hi, I'am having an issue with UART using app_uart_fifo.c (SDK 0.9.2). At times I get communication error (usually at attaching and detaching uart connector) and my error handler:

  switch(app_uart_evt_p->evt_type){

case APP_UART_COMMUNICATION_ERROR:
{
TRACE("UART_COMM_ERROR\r ...`
(more)

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## register beacon return 403, permission_denied error

I taken the Android-nRF-Beacon-for-Eddystone app code from github.

From my account I configured my Google Dev console:

1) enabled proximity API

2) added credentials for OAuth2.0 and Client ID. Based on the SHA1 code of my machine.

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## ARM GCC compiles but bin file is very small and download but does not work

I am using the sdk version 11 and arm-none-eabi-gcc version 5.4 on linux mint to compile the blinky test application. I have pointed the Makefile-posix at the location of the compiler gone into the folder for the pca10028 board ... (more)

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## SWO and nrf52

Hi, If I understand correctly the debugger on PCA10040 can operate in 6MHz/n as SWO frequency. the nrf52 can operate at 4,8,16,32MHz swo frequency. How are we to use SWO?

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Hi, there! nRf Toolbox drove me crazy!! can anyone help me?

1. I flash "s130_nrf51_2.0.0_softdevice.hex" to the pca10028 board.
2. I compile the bootloader example "nRF5_SDK_11.0.0_89a8197\examples\dfu\bootloader\pca10028\dual_bank_ble_s130",and flash it to pca10028 board ...
(more)

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## How to implement max sampling with SAADC

I would like to implement a simple code to use SAADC on NRF52 to sample one channel at maximum sample rate (theoretical 200KHz). All the examples I have found use limiting factors such as using function "nrf_drv_timer_ms_to_ticks", slow clocks or ... (more)

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## nrf51822 memory exception

Hi.

Could I detect memory exception? Dose nRF51822 (Cortex-M0) has function of IACCVIOL "Instruction access violation"?

Thank you. Best and regards.

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## OBSERVER use timeslot cannot work

I am doing the test about timeslot with the project link text but it cannot scaninng and i found the timeslot is work because i get event NRF_EVT_RADIO_BLOCKED and it call the function btle_scan_enable_set (scan_enable);

So the timeslot is work ... (more)

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## nRF52DK ble_uart and DFU does not work

Hello All,

At a time either ble nus or dfu can work.

I have an problem with the services ble nus for uart and dfu does not work simultaneously means if i am adding both the services in my profile ... (more)

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Hi,

I've a custom board which has NRF51822 SOC and STM32 SOC. These two are connected over UART. In past I've successfully performed DFU OTA (BLE) for nrf51822 MCU, and now I'd like to use the nrf51 ... (more)

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## HVX indication works only once

Hey, I got 2 beacons which I have connected via BLE successfully however I have some problems with BLE_GATTC_EVT_HVX event. Every time I get only one BLE_GATTC_EVT_HVX event on client side. I am sure that server side changes characteristic more ... (more)

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## Ending up in WDT_IRQHandler() without knowingly using the watchdog timer

Hi.

I have a custom board based on the nRF51822. Application uses s130, SDK 11.0.0. It's a peripheral. Using gcc.

I'm finding that when field testing my device, it will often stop running. If I then ... (more)

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## Device manager: How to identify between already bonded phones with new phones?

Hi, I am developing a firmware using nrf51822xxaa s130 SDK 10.0. I am using device manager to exchange the security keys and storing the bond information. For my project, I need the firmware to connect to the phone that ... (more)

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## Why does using P0.0 as uart RX cause BLE stack to hang?

I have a custom board that doesn't use the external 32Khz crystal. The engineer that designed it chose to use P0.0 as UART RX. (I know, poor choice.) I have set up a custom_board.h file with the ... (more)

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## nrf52832 clock source

Can someone please provide some guidance about changing clock source I use s132 softdevice and the examples available in SDK

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## nRF52 Dk Low power mode, constant latency

Hello, I am working on low power modes and I got trouble finding the code to switch from NRF_POWER_MODE_CONSTLAT and NRF_POWER_MODE_LOWPWR. Can anyone please guide me to better understanding of programming these devices? THANK YOU

#### Statistics

• Total users: 12872
• Latest user: GrandGogo
• Resolved questions: 6723
• Total questions: 15435

## Recent blog posts

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## Recent questions

• ### How to get APP_ERROR_CHECK(err_code) to print out error msg instead of reset?

Posted 2016-07-29 04:00:21 by helpme
• ### How to know which line cause APP_ERROR_CHECK(err_code) to fail?

Posted 2016-07-29 03:56:16 by helpme
• ### Men's Sunglasses For Fashion And Function

Posted 2016-07-29 03:00:52 by Maple Tolley
• ### windows 7 activator 2015

Posted 2016-07-29 01:31:23 by Bernadine Roche
• ### GPIOTE manual clear

Posted 2016-07-29 00:27:05 by John Lee