# 21,765 questions

116
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2
2

## freertos not working in nRF5_SDK_13.0.0_04a0bfd

Just opened the new sdk and tried it out. Keil stated I needed to update packs so I did

I have 2 DK boards both are versions V1.1.0 dated 2016 32

Using nRFGo I erase all and load ... (more)

20
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no
no

## Speedup upload procedure via BLE

Hi, I'm trying to find a way to speedup the upload procedure of an application, via BLE on a Arduino Primo with the DFU service.

Here you can find my code: https://github.com/astronomer80/ota-dfu-python/blob/master/dfu ... (more)

288
views
3
1

## On SDK 13.x.0 only

Please Do not judge the quality of SDK based on number of entries here. This thread should be considered as part of Nordic effort to find issues and possibly give a workaround to maintain ... (more)

38
views
no
1

## Is it possible to use Nordic SDK with Arduino?

Using the nrf52 DK, I was trying for hours to setup Segger IDE on a mac, and the software doesn't feel good to me, its not clear where is your code, it has too many libraries, it feels cumbersome ... (more)

15
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2

Hi I read somewhere that when using internel ref for analog measurements the Vin changing does not influences the analog reading. Is that true?

https://devzone.nordicsemi.com/questi...

13
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no
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## bluetooth disconnect callback is called only one.

Preferences: nRF52832 chip, s132_nrf52_4.0.2_softdevice

Two or more nRF52832 chip are connected to iOS and Android. And do bluetooth off in smart phone. this case, bluetooth disconnect callback function is called only one. but, if do that in TI ... (more)

16
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## nRf52840 ext. pin Counter / Capture input

hi Dear Engineers!

Have a question about external TIMER counter input hw PIN. as Known, all the MCUs have a timer with external pin as a counter / capturer ability. how about nRf52840 ? have any int. timers this kind of feature ... (more)

12
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no
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## PWM outputs in nRF51822

Hi, I need 6 PWM channels for a BLE project. Is there any solution to add 2 other pwm channels to nRF51822? If not, Which other Nordic ICs might be helpful instead? Thank you

18
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no
1

## DFU buttonless entry method fails to erase flash

Hello,

This is a DFU custom project...the core problem is that I cannot erase the bootloader settings page from the chip.

While trying to use a slightly modified version of the BLE DFU buttonless code, I am running into ... (more)

30
views
1
vote
3

## C implementation for writing to NVMC

Hello,

I am looking through the data sheet for the NRF52 and do not see anything for writing to NVMC.

I see you can erase and configure the NVMC using:

NRF_NVMC -> CONFIG = 0x2; NRF_NVMC -> ERASEPAGE = 0x0150;

I was expecting see ... (more)

47
views
no
1

## Undefined symbol nrf_ecb_init()

Hi

I am working with mbed targetting for ReadbearLab Ble Nano. I am trying to encrypt payload before sendind it with:

include "nrf_ecb.h" ...

int main(void) { ... nrf_ecb_init(); nrf_ecb_set_key(key);

But I see:

Undefined symbol nrf_ecb_init() (referred from main.RBLAB_BLENANO ... (more)

18
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## ble_mesh flag

Hi,

I want to ask a few question for ble_mesh.

What do these functions do: rbc_mesh_persistence_set(..), rbc_mesh_tx_event_set(..)

Who should do the set operation? Sender or receiver?

I read the document. But will you explain by example?

Thank you

11
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## nRF52840 input circuit question

Dear Engineers! have a questions about the Input circuit of nRF52.

I have to monitor the signal LEVEL from some sensor. The signal can be Positive or Negative current, so , the input of nRF52 should be internally pulled to (+) or ... (more)

12
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no
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## How to debug open-thread on nrf52840 using Segger-RTT

Hi May i know what would be the debugging procedure using segger-RTT for nrf52840 and what is the debugging Hardware Required ?

14
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## nrf52832 advertise battery strength in beacon application

I am working on RTLS project using nrf52832 SOC. In beacon mode i want to advertise temperature and battery strength . but i am not sure if what method should i use to measure battery ofcourse power source during advertising in ... (more)

54
views
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1

## unable to find source of issue

hi i am unable to find cause of issue i am working on BLE and PWM driver when i get data in nus_data_handler i am calling pwm init function. and then it is going to ble_advertising_on_ble_evt(p_ble_evt); in ble dispatch ... (more)

41
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no
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## 52832 master, through the I2S interface to transmit voice data to the DAC player

Hi,

Currently I have a problem with the use of 52832 I2S interface to transmit voice, the transmission is not coherent.

Here is my initialization code

    // Enable reception
NRF_I2S->CONFIG.RXEN = (I2S_CONFIG_RXEN_RXEN_Enabled << I2S_CONFIG_RXEN_RXEN_Pos);
// Enable transmission
NRF_I2S->CONFIG.TXEN = (I2S_CONFIG_TXEN_TXEN_Enabled << I2S_CONFIG_TXEN_TXEN_Pos ...
(more)

66
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1

## I am getting -1 on the screen when I save an unint32 and read it back? I am using BLEnano

uint32_t value = 99999;

lcd.clear(); lcd.setPosition(0,1); lcd.printf("Writing bytes 0-16\n");

i2c.start();

data[0] = 0; data[1] = 0;
data[2] = ((value >> 24) & 0xFF); i2c.write(0xA0, data, 3); wait (0.1);

data[0] = 0; data ... (more)

16
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no
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## How to undefined LEDs and Buttons in custom code?

Hi,

In my application, using BMD301 i have made one custom PCB. I am using SDK 12.0.0. In my PCB I have not used all the four LEDs. I have assigned p0.19 to the BSP_LED_0 which is ... (more)

12
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no
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## Supervision timeout issue

I'm having a strange problem where the Supervision timeout does not seem to work right at the point the connection is initiated (sd_ble_gap_connect() was called but BLE_GAP_EVT_CONNECTED is not yet received). At any other point during the connection, it ... (more)

61
views
no
1

Hi guys,

I am experimeting using the experimental_bootloader_secure_serial example, but I am not having luck with the example code. I tried using the BLE secure bootloader and all worksfine over BLE.I tried the same steps that I used for ... (more)

14
views
no
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## RTC issue in port_cmsis_systick.c

Hello,

Ported my FreeRTOS application on NRF52 from SDK 12.2.0 to SDK 13.0.0 .My application is using freertos apptimer for timestamping and waking up of device which was working without any issues on SDK 12.2 ... (more)

45
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## Do the examples for PCA10028 or PCA10040 work the same for PCA10031? If no what chnages are required for the examples to work for PCA10031

I am trying to run the examples given by Nordic on my nRF51 dongle. Most the examples are for PCA10028 or PCA10040 where as my dongle is PCA10031. I tried running them but i am not able to get the ... (more)

18
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## How to connect and program the nRF 51 dongle for ant

I am trying to find examples for nRF51 dongle P10031. I would appreciate some guidance and help regarding the same. Its my first time using the device.A link to a sample example or question would prove helpful too. Thank you

18
views
no
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## 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)

188
views
no
1

## nRF Connect bonding

I am trying to get nRF Connect 1.0.0 to bond with my sensor (which uses a nRF52832). This works from several other programs (CySmart on Windows, LightBlue on iPhone), but not with nRF Connect. This is the log ... (more)

35
views
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## nRF Connect for iOS crashes when advertising 5+ bytes of Manufacturer Data

I've been using the nRF connect app to evaluate and test custom services that I'm building on the nRF52832 (Raytech module). Everything has been working great and the manufacturer data in the advertising worked just fine until we ... (more)

24
views
1
vote
1

## Can a peripheral read a CCCD value?

Hi,

I am wondering if it is possible for a peripheral device to interpret and react to a specific value written to it's CCCD by a central device. In all of the examples I looked at, it appears that ... (more)

56
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no
1

## RAM related issue / What are the best practices (armgcc, linker) > nRF51 16 kB vs 32 kB

Hello Nordic Team,

I have a question about RAM Related Issue for our program or rather more generally in relation to a board test that we just received and for which, with my astonishment a fairly simple program does not ... (more)

28
views
1
vote
2

## openmesh on simblee range problems

I have created a build system that will install openmesh on simblee chips, and it appears to be mostly working. However, range is very poor, like max 2ft. I have tried adjusting tx_power, and channel to see if interference was ... (more)

#### Statistics

• Total users: 18589
• Latest user: Roseann Seale
• Resolved questions: 9213
• Total questions: 21765

## Recent blog posts

Posted 2017-04-11 11:49:17 by Radosław Koppel
• ### Taking a deeper dive into Bluetooth 5

Posted 2017-04-07 14:53:51 by John Leonard
• ### Logging enabled by default in SDK Bluetooth examples

Posted 2017-03-29 11:27:02 by Håvard
• ### Monitor Mode Debugging with J-Link and GDB/Eclipse

Posted 2017-03-29 05:56:12 by Daniel Veilleux
• ### Getting started with Nordic's Secure DFU bootloader, a step by step guide

Posted 2017-03-20 17:13:52 by Hung Bui

## Recent questions

• ### Is it possible to use Nordic SDK with Arduino?

Posted 2017-04-30 13:33:28 by Lola