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27,067 questions

19
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Last activity 2017-11-17 03:37:49 +0100 by dlip

Best place to add watchdog reset or system reset

We are using the NRF8001 in a product that is potted in epoxy with wireless charging and so completely inaccessible to any outside inputs except through bluetooth. We have seen on a few occasions that communication gets fouled up and ... (more)

25
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1
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Last activity 2017-11-17 03:37:09 +0200 by Ricky

how to use serial example in mesh SDK?

I get nrf mesh SDK form: http://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF5-SDK-for-Mesh/(language)/eng-GB

I want to use the serial example to control a mesh network, but there are 2 problem for me:

  1. how to use the python ...

(more)

41
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1
answer
Last activity 2017-11-17 03:36:53 +0200 by Thomas

Minor annoyance: SDK webpage links are broken

Hello Nordic Team,

A quick one to let you know the links on the frontpage of the NRF SDK are either broken or completely cyclical.

if you click on a link to a particular sdk, say nRF5 SDK v14.2 ... (more)

14
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Last activity 2017-11-17 03:32:12 +0200 by goldwake

PM_EVT_STORAGE_FULL event spammed

I am currently doing some stress testing to ensure that I am correctly removing peers when the peer manager storage is full.

In this regard, my device is acting as a peripheral, being connected to by Android 7 phones. I ... (more)

21
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Last activity 2017-11-17 02:03:32 +0200 by abhipray

UART HW flow control bugs

I have an nrf52832 connected to a UART-USB driver with RTS/CTS. CLI manages the UART connection. Using SDK 14.0.

When HWFC is enabled, if a serial connection is NOT established immediately, the scheduler library overflows with tasks causing ... (more)

19
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1
answer
Last activity 2017-11-17 01:40:57 +0200 by RK flag of Singapore

Can a characteristic have more than two permissions and properties?

There is only one constructor for type BluetoothGattCharacteristic in Android SDK

BluetoothGattCharacteristic(UUID uuid, int properties, int permissions)

Does the constructor take exactly one property and one permission?

For example, I want a characteristic to be both readable and writable ... (more)

89
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no
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2
answers
Last activity 2017-11-17 01:26:55 +0200 by ianm

Win 10 BLE stacks, acting as a central, problems accepting BLE connection parameter changes.

Background: In a previous posting I had asked if anyone knew of BLE connection parameter guidelines for Windows 10. The general response was, yeah ios has BLE connection parameter guidelines, but it doesn't appear that Windows 10 (or Android ... (more)

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Last activity 2017-11-16 23:57:07 +0100 by MichaelNordicUser

Why status code BLE_HCI_CONN_FAILED_TO_BE_ESTABLISHED ?

I'm tring to connect my phone to the multi-connect example client app

I'm tracing the ble events in the ble_evt_handler.

When I open the server app on my phone, I see this in my RTT

BLE_GAP_EVT_CONNECTED
BLE_GAP_EVT_DISCONNECTED
BLE_GAP_EVT_CONNECTED ...
(more)

22
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Last activity 2017-11-16 23:24:35 +0100 by Matthias L. Jugel

NRF52832 power usage after flashing

I am having a strange problem. After I flash the program to the NRF52 and do a reset (does not matter whether it is a soft reset or pin reset) the system (DK and my own board) will consume 3mA ... (more)

25
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1
answer
Last activity 2017-11-16 21:55:15 +0100 by RK flag of Singapore

ble_gatts_service_add error code 0x0000000c

Hello, I am trying to set my own BLE service, and on the adverstisement initialization I get an error 0x0000000c when calling to ble_advertising_init().

Why does it mean and happen? How can I fix it?

Thanks in advance

My uuids ... (more)

15
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1
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answers
Last activity 2017-11-16 20:24:30 +0200 by DuyLionTran

pb remote client doesn't work

Hello,

I used 3 nRF52-DKs to run the pb_remote and it ran well with the Mesh SDK v0.10.1. Then I created my own project and copied the code from the pb_remote client and server and put in my ... (more)

14
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Last activity 2017-11-16 19:25:49 +0100 by zolotiyeruki

nrf_dfu_flash_* callbacks don't get called

I am modifying the bootloader_secure_ble code to receive a serial number via BLE and store it in flash. However, whenever I call nrf_dfu_flash_store or nrf_dfu_flash_erase, the callback is never called. Here is my code (stripped of other functions and comments ... (more)

10
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Last activity 2017-11-16 18:48:32 +0100 by jlarsen

I am having a problem on the second connect after bonding to a bluez 5.43 central

I can connect/pair/bond to the nrfConnect app and disconnect then reconnect just fine. When I try to do the same to a central running on arm bluez 5.43, the second and subsequent connections timeout after about 30 ... (more)

16
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Last activity 2017-11-16 18:23:27 +0100 by Ricco

connecting DCC and DEC4 on nrf52832 for remote programming

I want to use the nrf52dk PCA10040 to remote program a BC832 chip from Fastel.

They say: "BC832 V1 pin B3 C3 (DCC, DEC4) needs to be connected to the program can be burned"

I don't understand why this ... (more)

31
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2
answers
Last activity 2017-11-16 18:06:02 +0200 by Ben

nRF52832, STM32 Central w/ Serialization not scanning [closed]

I'm trying to implement a BLE Central device on an STM32 using Serialization to connect with an nRF52-DK board; I've previously gotten a BLE Peripheral working on the same setup (in this case I'm not trying to ... (more)

20
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Last activity 2017-11-16 17:55:16 +0200 by chaitz

Programming external board using SES and nrfjprog

Hi,

I am able to program a SparkFun nRF52 breakout board via nrf52 Dev Kit using Segger Embedded Studio. However, I am not able to achieve the same results using nrfjprog. All the dev tools are OSX.

A simple erase ... (more)

24
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Last activity 2017-11-16 17:04:54 +0200 by Brendan PG Ambayan

Eddystone beacon using nrf51822/waveshare ble400 and blackmagic probe in Arduino IDE

Hi! I am currently doing my project on BLE beacons. I am using nordic's nrf51822 and waveshare ble400. I am using a blackmagic probe instead of jlink to program it using Arduino IDE. I want to use sandeep's ... (more)

30
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3
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Last activity 2017-11-16 16:46:41 +0200 by huaminhtuan

nRF52 with BLE and freertos

Hi everyone,

I am developing a remote control using nRF52832 chip. My prototype is currently developed in PC10040 board. The IDE is Eclipse Oxygen, and the SDK is S132 v5.0.0.

I am trying to create an application using ... (more)

121
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2
votes
1
answer
Last activity 2017-11-16 16:20:44 +0200 by ToasTer86

thingy52 (&nRF52840) writing my own software

Hey Nordic Devzone,

I am really new to Nordic and am still a student in embedded software engineering. So first some background information.

I have 6x nRF52840 and 5x Thingy52. My goal is to create a mesh network using 5 ... (more)

22
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Last activity 2017-11-16 16:17:26 +0200 by engelter

Direct Advertising with Arduino IDE

Hello,

i would like to connect two Redbearlabs Nano v2 just with eachother. The central one connects just to the peripheral, but the peripheral is still open for every device. So i want to use direct advertising and give the ... (more)

23
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1
answer
Last activity 2017-11-16 16:00:34 +0200 by Jørgen Holmefjord flag of Norway

How to write to a custom 128 UUID service using pc-ble-driver-py

I am using pc-ble-driver-py to configure an nRF52832 demo board as a BLE central device. I currently have the heart_rate_collector.py example working. However, what I would like to do now is scan for all BLE peripheral devices, collect to ... (more)

31
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2
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Last activity 2017-11-16 15:25:46 +0200 by 无线射频

nrf24L01+ EVKIT

image description I have a 24L01 + evkit in my hand and I want to burn my own program on this board, but I do not know how to burn it in. I have the following 3 questions: Question 1: Where is the ... (more)

19
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Last activity 2017-11-16 15:20:15 +0200 by Newbie

Extra scan response data field

Hello,

I am using sdk12.2.2 and nrf52. I am including scan response data in my packet. But every time I am getting extra fields in my raw data as seen in nrf connect app. Screen shot is Screenshot_20171116-194022 ... (more)

74
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1
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2
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Last activity 2017-11-16 14:38:26 +0200 by Petter Myhre flag of Norway

How large is the size peer manager uses?

I'm trying to determine DFU_APP_DATA_RESERVED and FDS_VIRTUAL_PAGES. According to this Q&A, DFU_APP_DATA_RESERVED must be the same FDS_VIRTUAL_PAGES, if FDS_VIRTUAL_PAGE_SIZE is 1024.

My application uses 11 pages, so 11+the size peer manager uses must be FDS_VIRTUAL_PAGES( and DFU_APP_DATA_RESERVED ... (more)

27
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4
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Last activity 2017-11-16 14:33:10 +0200 by Võ Thanh Hiếu flag of Viet Nam

Differences in nRF51 chip versions

We are moving from a PCB using a nRF51822 QFAB module to a newer PCB using an nRF51822 QFAC module.

We observed that with the new QFAC PCB we have a significant connection drop rate, >20 times an hour. Logging ... (more)

53
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1
answer
Last activity 2017-11-16 14:20:18 +0100 by Joakim Jakobsen flag of Norway

What is the input impedance of nrf52840 in different modes

Hello,

Can you please provide the input impedance or the S-parameter file of the impedance for the nrf52840 for receive mode, and also at tx power levels of -40dBm, 0dBm, and 5dBm?

We request this data the Ant port of ... (more)

30
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1
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1
answer
Last activity 2017-11-16 14:06:06 +0200 by Petter Myhre flag of Norway

central and peripheral communication

hi support team, my nrf52840 is acting as peripheral and my mobile with nrf connect is acting as central. after the connection i am able to read and write my device name, link loss alert, battery notification alerts, immediate alert ... (more)

25
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votes
1
answer
Last activity 2017-11-16 14:02:06 +0200 by Hung Bui

NRF_ERROR_INVALID_STATE in Mesh

Hi Nordic Devzone,

I want to send a packet using send_reliable_message periodically every 3 seconds(using nrf_delay_ms for that) but i get NRF_ERROR_INVALID_STATE (in client side) and in the server side i get the same packet 6 times which i ... (more)

35
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1
answer
Last activity 2017-11-16 13:55:59 +0100 by Bjørn Spockeli flag of Norway

Is the extended advertising feature of Bluetooth 5 supported by any released softdevice yet?

I'm wondering if the extended advertisement feature of Bluetooth 5.0 is supported in any softdevice. If not, when can we expect it to be supported? Still within 2017 (as I read in several posts) or we are looking at 2018?

36
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1
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1
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Last activity 2017-11-16 13:35:27 +0200 by Hung Bui

Bluetooth sig on different versions of device

Hi, we are working on device that will have Bluetooth in it. It uses 3rd party Bluetooth module, that is qualified from manufacturer of module. We are making all CE, FCC and other regional certification process, only thing remaining is ... (more)

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  • Resolved questions: 10973
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  • Total questions: 27067