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# 5,818 questions

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13
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## Alert notification on nrf51822

Hi,
I need help with alert notification service. I am working on alert notification example provided in the SDK 12.3.0 with S130. I tried this example on nrf51422 development board and it is working. After changing to RAM ...
(more)

15
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## How to generate random keypass ?

I want to communicate Central and peripheral devices with KeyPass. Also I want to generate keypass in Peripheral device. But keypass should to include symbols, low/upper case and random character like "sP25Scw!HU?". I tried this code;

char *randstring ...
(more)

19
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1
answer

## getting incorrect output using the timer_example_timer_mode example

My goal is to generate the clock signal of some particular frequency. I am using nrf51822 DK and used the timer example code from github: https://github.com/NordicSemiconducto.... With timer prescalar set to 0 , the output frequency should be ... (more)

16
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## NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

I am using SEGGER Studio on MacOSx.

When use the latest mesh SDK, I can run the light_control example and see the debug log in the Debug Terminal of SEGGER Studio.

However, when I use BLE SDK 12.3, I ... (more)

15
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## Unable to see NRF_LOG BLE SDK 12.3 [closed]

I am using SEGGER Studio on MacOSx.

When use the latest mesh SDK, I can run the light_control example and see the debug log in the Debug Terminal of SEGGER Studio.

However, when I use BLE SDK 12.3, I ... (more)

30
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1
vote
1
answer

## sdk14.0.0 NRF_LOG_INFO nothing output

hi，all
i got the nrf52832 dk and run the ble_app_uart example , but i found nothing output in jlink rtt viewer after called the NRF_LOG_INFO("UART Start!") , so could any body tell me how to get the right output, besides ...
(more)

42
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no
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1
answer

## nRF51822 how to save user data to UICR FLASH

nRF51822 how to save user data to UICR FLASH? I have some user data bytes wan to save to UICR ,I see the CUSTOMER[0]~[31] is can be used. how to save it ? think.

like UICR CUSTOMER[0]~CUSTONER[31]

16
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## SPI not working in infinite loop

Hi experts

I am trying to interface an external ADC to NRF51-DK i am presently reading SPI ADC code values on BUTTON press event. I am able to read the values from ADC properly on button press.

I want to ... (more)

65
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no
votes
1
answer

## How to wire I2C for NRF 51822 with MPU 9250.What SDK should I use?

I am trying to wire NRF 51822 over I2C with MPU 9250. If I should use the GPIO's where should I initialize the Pins . What SDK should I use?

42
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2
answers

## Restrict Range

hi,

Is it possible to restrict range / rssi value upto certain range.?

I want to connect ble within 2 meter only. No device should connect after 2 meter.

kindly support.

26
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## Restart encryption without slave supporting encryption best practice

Hello, My question is about the case when initiator device attempting to restart encryprion with previously bonded responding device that lost the bond context. As usual, after reconnection softdevice fires BLE_GAP_EVT_SEC_INFO_REQUEST callback to make application load bond context to restart ... (more)

23
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## Why does the hardfault "line_num=1436 , rem.c" occur?

Hello, dear Nordic employee,

MCU: 51822QFACA1 The using SDK is : SDK 7.2.0 The using SD is : s110_nrf51822_7.3.0_softdevice

There was one device (our product) runing into the hardfault state, and just only one device got the problem ... (more)

285
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no
votes
3
answers

## nRF5 SDK v13.0.0

Release Date: Week 11, 2017

Highlights: - Implemented a new license scheme for the SDK distribution. See the documentation folder for details. - Updated the Bluetooth and ANT examples to support the newest SoftDevices S132 v4.0 ... (more)

26
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no
votes
1
answer

## Half-Duplex 2-wire spi?

I'm working with a sensor that communicates over spi, but it uses a single wire for miso and miso. Is there any alternative to just bitbaning the protocol? Specific sensor (for reference) is the adns2620. Thanks!

50
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1
vote
2
answers

## Setting GPIO pin as output pin

I am using nrf51822 DK. How to set GPIO pins as output pins and access the pins to set or reset the output.For example if I want to use pin 20 as output, how to configure that.I need ... (more)

31
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2
answers

## ble as a scanning device

Dear Guys,

I wonder if there is any possibility to have my ble as a scanning device but for softdevice version s110, I'm asking because I found all the examples are with S120 and S130.

and of course if ... (more)

41
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1
vote
1
answer

## Problem with system off mode and stopping advertisement [closed]

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)

51
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no
votes
1
answer

## How to programme the nrf51822

i just purchased the http://www.xcluma.com/bluetooth-4-0-m... this xcluma nrf51822 module , so how can i progarmme it . which IDE i need to use , please help me ,am new in to nrf and Arm .

110
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## BLE connection problem

Hi,

I'm using sdk12.3.0 ble_app_uart.

My problem is BLE connection.

Sometimes(almost 50%)I tried to connect BLE but fail and I have to connect again.

I don't know why.

This image is messages that I ... (more)

32
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no
votes
1
answer

## What is the differences between "ble_nus" and "ble_nus_c"

In "ble_nus_c" file we can get nus_data with "ble_nus_c_evt_handler" function. We can do the same with "nus_data_handler" in "ble_nus" file. So why are there two separate ble_nus files? Also on a device I have defined as peripheral (sdk8.0.0 ... (more)

26
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answers

## TWI. RXDREADY event signaled, TXDSENT - not.

I am trying to communicate with DS1307 (RTC) using TWI on nRF51822. I have configured the pins, address (0x68 fixed for DS1307), frequency and enabled TWI.

Now I am about to read the register 0x00 of the slave (DS1307) I ... (more)

34
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1
vote
1
answer

## nRF51 pstorage during ble_radio_active_evt

I've been banging my head against this for a couple days now, and need some help. First the layout.

In our setup we have an accelerometer with a movement interrupt pin (high when movement detected) tied to a sense ... (more)

83
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5
votes
4
answers

## SDK and SoftDevice licenses

Hello,

Since this seems to be a very hard topic to find info about (its very contradictory and confuse) I'd like to ask a Nordic employee directly.

I'm planning to build a product that will use the NRF51822 ... (more)

34
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answers

## Can I change the Mona Lisa painting on the nRF Beacon App?

HI,

I am very new to this, I am looking to put a video or flash player or another image to to load into my nRF51822 beacon kit. I am thinking the straightaway method would be to replace the Mona ... (more)

28
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## bmd-200 - precompiled blinky works but self-compiled doesnt

Trying to get the BMD-200 board up and running and the blinky_pca10028.hex seems to work just fine but compiling it from source (blinky/pca10028/blank/armgcc)does not. There are no errors during compilation or uploading the application. Are ... (more)

63
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1
vote
2
answers

## PCA10040 problem with ble example program

First of all I want to say hello. I'm new in nRF52 devzone and I have problem with ble_app_uart and ble_app_hrs programs. I use pca10040 board and eclipse for flash and debug. When I flash blink and spi example ... (more)

72
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3
votes
3
answers

## Softdevice and SPI not Working Together

Hi.

I am working on a project which is using SPI and BLE together.

I wrote SPI code before without soft device. It has simple update function which is sending SPI data. And also i have an timer interrupt which ... (more)

21
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answers

## Including C++ libraries in bootloader

Hello Everyone,

I am new to keil and nrf51822 programming. Currently I am using softdevice s130 with hex file for bootloader from folder : nRF5_SDK_11.0.0_89a8197\examples\dfu\bootloader\hex to support over the air update.

I want to include ... (more)

83
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1
vote
2
answers

## Softdevice not working

Hello I'm a beginner using NRF51882, I do not have enough money to buy NDK51 Development or NRF Dongle, the solution I changed STLINK STM32 to JLINK by following tutorial on youtube https://www.youtube.com/watch?v=TkPWQ ... (more)

23
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answers

## make: *** [_build] Error 2

I have somewhat followed this guide for setting up Eclipse to program the nrf51822. I get this error message when trying build the project in eclipse:

12:35:35 **** Incremental Build of configuration realserver for project X ****
make nrf USE_TEST_SERVER ...
(more)

#### Statistics

• Total users: 23749
• Latest user: Joana Porto
• Resolved questions: 10098
• Unanswered questions: 3091
• Total questions: 24488

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