# 2,669 questions

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## BLE GATT_INTERNAL_ERROR 129

Hi,

I am doing development on Android platform. I am using Marshmallow device to develop my BLE application. Many times I am getting status code 129 in onServicesDiscovered() method. After that connection gets disconnected. And it goes into infinite loop ... (more)

17
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## Data storing in flash based on timer.

Hello,

I am working on NRF52382 custom board, where I am running a timer of 30 sec to get a value every 30 sec.

I want to save this value in flash.I am well aware of flash data storage ... (more)

13
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## Testing coded PHY with UART?

I have two nRF52840-pdk's and two laptops. I was thinking to send test strings using the following Basic setup:

       laptop1 - usb1 - pdk1 ....(coded PHY transmission)....pdk2 - usb2 - laptop2


Can I use directly some existing example codes for making this ... (more)

18
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Hi, ti wanna

14
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1
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## How to create a whitelist on the Central device

I want to create a whitelist on the Central device. Because there is a lot of peripheral devices around and I just want to connect one peripheral device. First I register the address of the central device to the peripheral ... (more)

27
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## Is there a way to get more capacitive touch inputs?

Both the capacitive touch library and the driver (which is better ?) are using the analog inputs. There are only 8 of them , and we need 10 at least buttons.

Is there a way to "cheat" ? I need different buttons where ... (more)

6
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## Configuring LEDs for bootloader_secure-Example on custom-board

Hello,

I am using the bootloader_secure-Example on a custom-board and I want to configure a LED as status-indication.

Since I am on a custom-board I disabled the functions leds_init() and buttons_init(), that would provide some functionality when using a nRF52-DK ... (more)

13
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## How to read fifo in TWI?

Hello.

I use nRF52 & mpu9250. I want to use dmp. But now it's not going well. I think the cause is method of loading from fifo register.

static uint32_t mpu9250_read_fifo_register(uint8_t address, uint8_t reg, uint32_t length, uint8_t * p_data)
{

uint32_t ...
(more)

16
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Hello! I have a problem when scanning and advertising at the same time with a NRF51822 and S130 v.2.0.0. (SDK11).

I can start both scanning and advertising without any problem and they seem to work fine, but ... (more)

29
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## GATTS table size - inconsistant RAM start

Hello,

I am developing a profile which includes 39 characteristics spread over 4 services on nRF52840/SD140/SDK13. When I add one too many, sd_ble_gatts_characteristic_add() returns NRF_ERROR_NO_MEM. Reading upon this issue led me to believe that I could simply tweak ... (more)

26
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## nrf52840 antenna with DC path to ground

Hello,

I'm currently designing a board with nRF52840 and I'd like to use an antenna that is a DC short to ground. Do I need a DC blocking capacitor in such configuration or is it ok to connect ... (more)

16
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1
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## nRF8001 setup files generation

Hi,

I'm trying to configure custom local GATT server on nRF8001 device. I added a custom service with multiple characteristics, but I can't generate source files. It says error code: 0x03, but I can't find what does ... (more)

20
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## Second characteristic write wont be received (From Android)

Hello,

I am using an Android application to send data to a nRF52 board. The nRF52 board is the peripheral and the Android phone is the central. This is the link establishment process:

1. Connect
2. Negotiate MTU
3. Discover services
(more)

30
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## Problem logging into Nordic site

Is there a problem logging into Nordic site ?

I have tried resetting my password and it doesn't seem to work. Had posted a question in the this thread earlier

49
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## [nrf52832][S132 4.0.2] application can not start normally in merged hex (SD+APP+BL)

I am beginner of 52832. Current software is based S132 4.0.2 and SDK 13.0.0. Test platform is based on PCA10040.0

My problem is application can not start normally in merged hex. Merged hex means softdevice ... (more)

31
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## packets out of order nRF24L0+

Hi, I am wondering why, sometimes, I get an odd packet out of order on the receiver. It is very random, it can occur at anytime, though usually it takes a minute or two. Testing shows that it does not ... (more)

14
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Hello,

I have a nrf51DK board with the following setup in my Ubuntu14.04 machine:

\$ nrfjprog -v

nrfjprog version: 9.4.0

When trying to program through Segger, I keep getting the following error:

ERROR ...

(more)

25
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## pstorage erase and read and write with sofdevice issue

hi

here i have use block size 16 byte and block count 5096. this is my start address 0x27000

i have tried to clear 79 pages.

and read data from flash with specific block.

write data to flash memory.

it ... (more)

22
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## what does the 0x40000000 error of sd_app_evt_wait() mean?

I'm using FDS and define record_chunk.length_words 173. system waits for fds operation is finished and in the meanwhile, system sleeps using sd_app_wait(). Then, sd_app_evt_wait() returns 0x40000000. what does this mean?

void fstorage_upsert_data(user_data_t user_data, fds_record_desc_t * p_record_desc) {
NRF_LOG_RAW_INFO("fstorage_write_data ...
(more)

13
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## iOS Device show Peripheral Name as DFUTarg after Doing DFU ?

Hello,

I am able to get NRFtoolbox dfu code work for iOS 10.3. and now able to perform the DFU on BLE device.

But when I perform the DFU its GAP name changes from Beam to DFUTarg and it ... (more)

15
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1
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## saadc called inside app timer not started

Hi guys. I'm trying to measure my battery. I'm testing my function from main and it works. The procedure looks like this:

• sample data

But when i try to execute the same from app ... (more)

25
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## Got a broken NRF51822-BEACON?

I just got my NRF51822-BEACON. I didn't see any LED flashing when I insert the battery. Also I can't find this beacon on nRF Beacon android Application.

18
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## hrs example pair

Hi, I used the hrs example found some problems, the problem is described as follows: I use the Android phone pairing binding device, when I cancel the pairing on the phone, click again when the phone found that the phone ... (more)

28
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## On connecting the nRF52 dk board to the PC should two of its LED's glow?

The board which I have shows only 1 LED glowing on start up. LED 1 is not blinking. Should I have to change the board?

43
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## Is there a DeviceFamilyPack supporting the pca10056 that i can use for debugging in Eclipse?

From what i found out there isn't, but maybe i am blind..

12
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## Store data in flash with NRF52832 and MBED and GCC

Hi,

I'm trying to use an existing NRF51822 mbed codebase on a new NRF52832 product and am having some issues.

First of all, it seems that I can't use mbedlib, but need to update to mbed-os because BLE ... (more)

34
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## what is result err code 3 in app_twi_callback_t

I am getting result code 3 after app_twi_schedule in the call back. What does that mean? Thanks Paul

19
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## DFU Security. I do not know the BLE Event

Hi;

I do not know the BLE Event(DFU bootLoader/SDK Sample) so I will ask you a question.

The environment using is below.

SDK v10.0.0 (Sample code/dfu_transport_ble.c)

SoftDevice S110&S120(v8.0.0?&v2.1 ... (more)

38
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## How to prgram nRF beacon kit as peripheral with KEIL and nRF DK52. I cannot see the beacon kit to be programmed. KEIL says DLL error

How to prgram nRF beacon kit as peripheral with KEIL and nRF DK52. I cannot see the beacon kit to be programmed. KEIL says DLL error. Please let me know thw KEIL settings to see the beacon as a device

27
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## nRF5 SDK 12.3.0 Eddystone on nRF51822 beacon

Hi,

I've seen that SDK 12.3.0 contains a new version of the application sample using the Eddystone protocol for BLE. I would like to know if this version is compatible with nRF51 chips as it was said ... (more)

#### Statistics

• Total users: 20387
• Latest user: Debdasora
• Resolved questions: 9454
• Total questions: 22463

## Recent blog posts

• ### The complete tutorial for developing and debugging nRF52 applications on a Mac

Posted 2017-05-11 04:13:06 by Mohammad Afaneh
• ### Bluetooth 5 2Mbps Demo with nRF52 Series and Samsung Galaxy S8

Posted 2017-05-09 14:20:22 by John Leonard
• ### Setting up Segger on a mac or pc and debug - step by step for humans

Posted 2017-05-05 14:03:35 by Lola

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

## Recent questions

• ### BLE GATT_INTERNAL_ERROR 129

Posted 2017-05-30 14:53:16 by Mrunali
• ### Data storing in flash based on timer.

Posted 2017-05-30 13:54:41 by Prashant Singh
• ### Testing coded PHY with UART?

Posted 2017-05-30 13:45:39 by slowhand