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# 855 questions

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9
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no
answers

## Sniffer cannot follow device

I'm using the 1.0.1 nRF Sniffer and 1.10.10 Wireshark on Windows 10 64bit. The firmware 1.0.1 is programmed to nRF51822 dongle using Jlink 6.12a. The exe works fine when no device is ... (more)

15
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no
votes
1
answer

## ble_app_hrs link in Eclipse tutorial is broken

Where can I download the example project that can be imported into Eclipse?

Broken link: ble_app_hrs

When I follow the link, I get this message: "The current document displayed does not exist in the ... (more)

35
views
1
vote
1
answer

## Wrong board in nRF5 SDK for Mesh v0.10.0

Hello,

I am having troubles to run the light_switch example from the nrf5_SDK_for_Mesh_v0.10.0.

I am using PCA10028 boards with nRF51822. I didn't modify anything in the SDK.

I did erase the content on the board, program the ... (more)

19
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answers

## can not disable Rx or TX

i need to disable RX when data was transmit and enable RX again when data transmit complete. i tried :

NRF_UART0->TASKS_STOPRX = 1;
NRF_UART0->TASKS_STARTRX=1;
NRF_UART0->TASKS_STOPTX=1;
NRF_UART0->TASKS_STARTX=1;


( i use SDK11 pca10028) but nothing happend,i still ... (more)

51
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no
votes
2
answers

## NRF51, SDK 12, FDS Issue(s)

Hello,

I am not able to make the FDS work. Here is my setup

• NRF51
• SDK 12.3
• S130 (2.0.1), i.e. s130_nrf51_2.0.1_softdevice.hex
• Using peer manager as well

sdk_config.h:

// <e> FDS_ENABLED - fds - Flash data ...
(more)

40
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no
votes
1
answer

## sd_ble_gap_adv_stop()

I have a beacon type running firmware. My system should start advertising when I press button A. and then stop when I press button B. So here is the scenerio:

Scene 1:Press button A(ok), press button B(error ... (more)

42
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no
votes
1
answer

## nrf51 dongle as sniffer works only few seconds after reset. Is it a known issue

I work with last sniffer version on Windows 10 pc. Also with last jlink dlls (6.20.e). It seems like problem with com. Any suggestions? ??

21
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no
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no
answers

## Why are discoverable modes not permitted with Whitelisting?

On this question it is said: "Error code 0x3201 means BLE_ERROR_GAP_DISCOVERABLE_WITH_WHITELIST: Use of Whitelist not permitted with discoverable advertising."

Why does example ble_app_hids_mouse (SDK v12.3.0) advertise with

    adv_flags                       = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;


and has Whitelist

    options.ble_adv_whitelist_enabled      = true;


enabled?

22
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answers

## NRF51 Custom Board - Keil Works but Makefile Does Not

Hello,

I have an NRF51822 custom board. I am trying to flash the code under

C:\Users\Home\Desktop\nrf51\nRF5_SDK_12.3.0_d7731ad\examples\ble_peripheral\ble_app_uart\pca10028\s130


I am trying to flash it with KEIL and it works. I ... (more)

38
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no
votes
2
answers

## Can we have multiply services in the program for BLE applicaiton? [closed]

Hi everyone, I have one question shown in the title. I try to add a second service in "ble_app_uart" project (the project is in the SDK for nRF51, SD130 v2), I did not change any code in the original project ... (more)

32
views
1
vote
1
answer

## How to configure NRF51-DK to flash firmware to a different nrf51 module

Hi all, I have here NRF51-DK, I am a bit familiar with the kit for a while. Now I want to make a system using NRF518422 chip. I manage to find a module - "Taiyo Yuden EYAGJNZXX".

My question is, Is ... (more)

32
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no
votes
1
answer

## NRF51 DK - X2 Oscillator

Hello, I'm using NRF51-DK (PCA10028) and I want to be sure if I'm using the external 32KHz oscillator (X2).

I'm using SDK12.3.0. I'm running the beacon example.

In example, I'm looking at decleration ... (more)

61
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no
votes
2
answers

## From Discoverable to Non-discoverable (but still connectable!) using the Advertising Library

1) Is it possible to configure the parameters of the advertising library (eg. SDK v12.3.0 using SD130 v2.0.1) so that my peripheral device (eg. nRF51) changes after a limited time -say 2 minutes- from limited discoverable ... (more)

97
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no
votes
1
answer

## light control mesh example not working

I'm trying to set up a ble mesh with 3 servers and 1 client on an nrf52 PCA10040 dev kit. Upon debugging, I'm getting an error that says: '64, APP_ERROR: C:\Users\sesa463145\Desktop\BLE\nrf5_SDK_for_Mesh_v0.9.2-Alpha ... (more)

67
views
4
votes
1
answer

## Cannot compile softdevice files

I am trying to set up a project for the nRF51 by hand and by looking at the example code provided by Nordic.

I am using Softdevice 130 on a nRF51422 and the 12.0.1 SDK.

Right now i ... (more)

98
views
no
votes
1
answer

## Where can i use Ble mesh

Hello,

I need to implement mesh networking capability in the beacons which are ble5. Can anyone explain me how do we achieve that?

I want send specific data via one beacon, that has to be transmitted to the second beacon ... (more)

103
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no
votes
1
answer

## [iOS] Reconnecting during full ota update, connect to wrong device

Hi,

we are developing and application on iOS which can among others, update our hardware over the air, and we found out that e.g. after bootloader update is done, then 'iOSDFULibrary' disconnect to the peripheral and connect again to ... (more)

43
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no
votes
1
answer

## How to restore to factory nRF51 dongle firmware

I can no longer use the BLESniffer software with nRF51 dongle because it won't reprogram with Ctrl-R getting an error suggesting using nRFgo Studio to reprogram it. Which I've done.

I've used nrfjprog -- recover. I've reprogrammed ... (more)

429
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no
votes
1
answer

## POF warning question

Hello,

This is a quick question regarding the behavior of the Power Supervisor POF warning. We implemented a fairly naive use of the POF warning where we would log an POF event whenever we received a POF warning. We set ... (more)

571
views
3
votes
2
answers

## nRF51 and nRF52 audio

Hello,

Is there any audio application example for the nRF51 and/or nRF52?

Thanks,

Fred

96
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no
votes
no
answers

## Notification feature

Hi

I have a project use nrf52 to have a purpose below.

Maybe after some pairing process with smartphone.

The user can trigger the device(nrf52, may press a button).

The smartphone can have a notification that the button has ... (more)

31
views
1
vote
1
answer

## USB connection issue with nrf51-dongle

nrf51-Dongle keeps on connecting and disconnecting (to the PC) when inserted into the usb port of the PC.

Also it is getting heated up upon keeping it in the usb port for a long time.

Any comments?

65
views
1
vote
1
answer

## BLE custom service transferring file

Hello there, I am a beginner, i want to know what changes should i make in the already existing example "ble_app_uart" so as to make my nrf51 development kit able to transfer and receive ".txt files" over ble.

Thanks in advance. Regards

645
views
4
votes
2
answers

## IPv6 Compatible BLE dongle

I just started trying to get an IOT IPv6 application up and running. On the nrf51882 end, I have flashed the IPv6 COAP server. The LED on the device is happily flashing away, so it could be working. The next ... (more)

55
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no
votes
no
answers

## BLE HID with android on google pixel

HI experts

I have a nRF51-DK board. I have flashed it with S130 softdevice. I have also flashed it with BLE_APP_HIDS_KEYBOARD application example. I have made little change in source code.

I see that

hello string is defined in

static ...
(more)

35
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no
votes
1
answer

## Persist Heap Memory in System Off Mode?

I'm writing an application that requires dynamic memory allocation, and also needs to sleep in the lowest power mode for a majority of it's lifetime. I'm currently persisting memory banks in system off mode like so:

NRF_POWER- ...
(more)

31
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no
votes
no
answers

## NRF51822 got odd behavior when calling app_timer_start before mainloop

Hi,

• I am using SDK 12.02 with softdevice 130 and having a odd issue here.

• In my application, I want to advertise ADC value via beacon and to report the ADC value via serial. In this design, I intend ...

(more)

39
views
no
votes
no
answers

## ble HID device with output and feature report

Hi nordic guys,

I have built a project based on ble_app_hids_keyboard demo in SDK12.3.0.This is a new hid deive which is microsoft defined in win10.The sample report is defined by microsoft in this link: link text ... (more)

71
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no
votes
1
answer

## Why the nRFgo Studio failed to program HEX file while the "Lock entire chip from readback" has been checked?

Hi all,

I programed hex file (blinky example) to nRF51DK via nRFgo Studio, and the board could work fine (keep blinky). However, the nRF51DK will work FAIL (LEDs are not blinky) while the "Lock entire chip from readback" has been ... (more)

45
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no
votes
1
answer

## Fail to program the read back HEX file via nRFgo studio

Hi there,

I could program the HEX file to nRF51DK via nRFgo studio successfully and the board seems to work fine as well. And then, I try to read back the HEX file from the same nRF51DK, the tool shows ... (more)

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## Recent blog posts

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