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Last activity 2017-04-24 18:05:23 +0200 by Gordon

nRF52 IPv6 SDK/examples

Hi,

I'm looking at adding IPv6 connectivity to my nRF52-equipped product. When I last looked a year ago, things seemed to be moving along very quickly. However, looking again at how to get started, I only see this SDK ... (more)

71
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2
votes
2
answers
Last activity 2017-04-24 15:28:16 +0200 by akshaey

pwm hardware individual loading mode nrf52

Please can anyone help me on how to use(program) PWM hardware with individual loading mode? My goal is to control 12 LEDs individually with different duty cycles and playbacks using pwm hardware which has 12 outputs to make a ... (more)

175
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no
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1
answer
Last activity 2017-04-24 11:41:52 +0200 by Bjørn Spockeli flag of Norway

Time to write one word to flash on nRF52

I found in documentation that the time to write to flash is between 67.5 and 338 µs.

  • What conditions influence this time? -How to avoid long writing times?

22
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no
votes
1
answer
Last activity 2017-04-24 11:28:39 +0200 by Bjørn Spockeli flag of Norway

Two nrf52 modules close-by

We are planning to use two modules at the same time one for esb and one for standard btle, because the esb is time critical and timeslot api seems to be to low priority. Do you think it is a ... (more)

42
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1
vote
2
answers
Last activity 2017-04-24 03:53:47 +0200 by cswanson420

Debug why DFU start packet not starting DFU

Firstly, platform: Sparkfun 52832 breakout board, DFU using UART, flashing an application, using nrfutil.

The problem fundamentally is the nRF52832 is not sending an ack that it received the DFU start packet. The packet is formatted correctly as defined by ... (more)

34
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Last activity 2017-04-21 18:04:32 +0200 by Corey Bird

Does hardware control SPIS MISO Pin?

I've run into some interesting behaviour in my code and wanted to see if anyone can clarify for me. It seems as though the SPIS module doesn't set the MISO pin as high impedance when the CSN pin ... (more)

64
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1
answer
Last activity 2017-04-21 15:59:14 +0200 by Jørgen Holmefjord flag of Norway

Android app

Hi, i'm currently using two NRF52 (1 central and 1 peripheral) using the ble_app_blinky and the ble_app_multilink_central.

I would now like to connect my Android phone with the Central in ordrer to control several NRF devices.

How can I ... (more)

52
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1
vote
1
answer
Last activity 2017-04-21 15:02:32 +0200 by Bjørn Spockeli flag of Norway

HRM Example on Sparkfun nRF52 board

Hi

I have this board: https://www.sparkfun.com/products/13990 connected to a PCA10040 Nordic board. I am able to write and debug the Sparkfun board (the blinky LED example). I am now trying to get the ANT+ HRM ... (more)

38
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1
vote
1
answer
Last activity 2017-04-21 10:25:26 +0200 by g.joshi

Interfacing External Sound Sensor with nRF52832

I have made following connection between nordic device and external sound sensor:

  1. VCC--> 5V
  2. GND--> GND
  3. GATE --> Pin 04
  4. ENVELOPE --> A0

I would like to know how to proceed with the code in eclipse. i have a code but i ... (more)

40
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no
votes
1
answer
Last activity 2017-04-20 16:12:19 +0200 by Stian flag of Norway

Using I2C with two devices on App Timer gets Hardfault

Hello,

I have two devices sharing an I2C bus. These devices are the MAX86150 and the MLX90614. DMA is being used. I2C is running at 100 KHz.

After initializing both devices, the application timer is configured to interrupt every 10 ... (more)

18
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Last activity 2017-04-20 16:08:43 +0200 by Constantin

Unstable timeslot with esb and ble concurrently

Hi,

I've just got the example running with one DK as ble peripheral and ESB at the same time uing the timeslot API and one DK as only ESB receiver. I can communicate fine between all elements (ble master ... (more)

88
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9
votes
1
answer
Last activity 2017-04-20 14:17:34 +0200 by TY

SPI behaviour is random depending on the previous code

Dear Nordic Team, Meanwhile, I've burned through a week finding a solution for this problem. Now I am out of ideas where to check for problems.


My application: I'm using an nRF52832-QFAABO 1639DE via SPI I am communication ...

(more)

101
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no
votes
1
answer
Last activity 2017-04-20 12:59:43 +0200 by schef

Use C++ with Nordic SDK (nRF52 series)

Hi, i wrote a lot of firmwares for nRF51x22 using C language and they works fine. Now we passed to nRF52 series and we want to use C++ (preferibly C++11) that is more readable, ordered etc... but i got ... (more)

76
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no
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1
answer
Last activity 2017-04-20 10:24:28 +0200 by Bjørn Spockeli flag of Norway

Choosing Nrf51 vs Nrf52 for buttonless secure DFU and handling multiple connection

We have these Dev Kit Nrf52 and also Nrf51 Bluetooth Smart Beacon Kit. For our application and for the simplest user experience we would like to benefit from update via OTA. And for a design and Security point of view ... (more)

16
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no
votes
1
answer
Last activity 2017-04-20 07:46:11 +0200 by Kevin s

Secure Bootloader Downloads app but stays in Bootloader on Custom board

My DFU is staying in the bootloader, even after successful download of the application package.

I have modified the secure bootloader for my custom PCB (removed the GPIO for the button check), so that is not an issue.

I can ... (more)

44
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no
votes
1
answer
Last activity 2017-04-19 14:28:25 +0200 by Bjørn Spockeli flag of Norway

Temperature Range of the nRF52

Hello,

I am currently searching for BT and NFC Chips, which can deal with a bit more than the usual 85°C. The nRF51822 is specified to 105°C, is it possible to run devices of the nRF52 Series at ... (more)

25
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answers
Last activity 2017-04-19 11:48:59 +0200 by bloobird0

central discovery error

Hello,

I am currently working on a project involving the nRF52DK to be a central device.

The peripheral device is based on the Nordic Uart service with minor changes: UUID, access properties...

On the central side, I use ble_nus_c as ... (more)

54
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answers
Last activity 2017-04-19 08:44:27 +0200 by Shreyas

FDS Write problem

Hello, I am using SDK 12.01 with softdevice (BLE application) and I want to write large data over flash. I am stuck with various issues. 1. When I try to write the data, FDS returns success. But write_flag is ... (more)

44
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1
vote
1
answer
Last activity 2017-04-18 17:17:23 +0200 by Sigurd flag of Norway

programming nrf52832 using SWD interface

Hi, We are using NRF52832 in our application. Can you please suggest swd interface module for programming NRF52832?? or tell me any cheapest way to program NRF52832??

36
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no
votes
1
answer
Last activity 2017-04-18 16:32:03 +0200 by Sigurd flag of Norway

Using FPU of nrf 52

hello, I am using Keil's uVision 5 v 5.22. Please tell me how to enable FPU. thank you,

21
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no
votes
1
answer
Last activity 2017-04-18 14:25:28 +0200 by Petter Myhre flag of Norway

Whitelist: Maximum devices to add in a whitelist

Hi

According to previous answers (1 & 2), the limitation on the maximum number of devices that can be added to a whitelist is 8, and is due to softdevice timing limitations. However this value is modifiable in ble_gap.h, so ... (more)

95
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answers
Last activity 2017-04-14 16:24:10 +0200 by polalavik

Can't compile NRF52 examples

Following this tutorial : https://devzone.nordicsemi.com/tutori...

I type 'make' and it compiles for a bit and then I get a bunch of errors that say this:

[278]: *** [_build/nrf52840_xxaa.out] Error 2
make[277]: *** [_build/nrf52840_xxaa.out] Error ...
(more)

822
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no
votes
2
answers
Last activity 2017-04-14 11:56:57 +0200 by jean-marc

NFC example for nRF52

During the webcast earlier this week, we were shown a phone pairing with the nRF52 dev board using NFC.

Is the code used for that NFC demo available as an example project?

31
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no
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answers
Last activity 2017-04-13 21:07:03 +0200 by dustinface

nRF52832 : PWM Driver Clock lower then 125kHz

Hey,

just wondering if its possible to lower the pwm driver clock of the nRF52832 to around 500Hz? Im working on a LED dimming application and the LED spots i use have really bad on/off times. Im getting much ... (more)

24
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no
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no
answers
Last activity 2017-04-13 15:48:29 +0200 by Moritz

Best way to save sensor data with FDS?

Hi,

I want to collect sensor-data, save it to flash and access it later. I´m not quite familiar with ways to save data and get a little bit confused by the fds library (but already managed to save and ... (more)

12
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no
votes
1
answer
Last activity 2017-04-12 17:49:29 +0200 by Steve H

Using ESB and Serial together on nRF52 [closed]

Hi all,

I am using a nRF52-DK board to receive data from the USB port using Serial, and transmitting it using ESB to a second board. If I use either Serial or ESB individually, it works fine. I have a ... (more)

17
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no
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no
answers
Last activity 2017-04-12 17:38:31 +0200 by hathach

Last BLE_GATTC_EVT_WRITE_RSP does not contain handle

Hi,

I am working on with nrf52 with SD132 v2 SDK11 since we need serial bootloader.

I tried a gattc long write sequence to write 22 bytes. Everything works well, peer got data and response correctly. However, the last BLE_GATTC_EVT_WRITE_RSP ... (more)

14
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no
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no
answers
Last activity 2017-04-11 17:24:41 +0200 by Henri.D

Nrf52 stop after receive beacon data with several different adress

Hi all,

I work with a nrf52, my project send and receive Beacon data. when i work only with 2 card all works fine but when there are several transmitter and 1 receiver the nrf stop and doesn't do ... (more)

104
views
3
votes
1
answer
Last activity 2017-04-10 16:30:55 +0200 by Petter Myhre flag of Norway

nRF52840, MQTT, TLS1.2

Dear Nordic,

What I want to do:

  • Battery powered sensor network
  • One gateway (BLE --> WLAN) with a serial-to-wifi chip connected to nRF52
  • MQTT (IBM Bluemix --> CoAP is not supported)
  • TLS1.2 (IBM Bluemix)
  • Long range (Bluetooth 5), indoor and outdoor ...
(more)

32
views
1
vote
1
answer
Last activity 2017-04-09 12:23:45 +0200 by RK flag of Singapore

gpiote with FreeRTOS

Hi,

I migrate my code to FreeRTOS environment.

I use SDK12.2.0 ble_hrs_freertos code example as a startup project.

My question is how i need to init gpite?I receive error ,8

  err_code = nrf_drv_gpiote_init(); //!!! err_code  = 8
  APP_ERROR_CHECK(err_code);

And ... (more)

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  • Resolved questions: 9161
  • Unanswered questions: 2522
  • Total questions: 21630