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Last activity 2017-12-16 01:11:18 +0200 by Dave_couling

Accurate Time Capture

Hi guys, I'm using a HFCLK TIMER to time ADC sample capturing via PPI. This eliminates CPU+BLE usage from affecting my time keeping. I assume that each ADC sample arrives in my callback within usec variance from my ... (more)

16
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Last activity 2017-12-15 00:13:34 +0200 by Janis

nRF528xx Radio TX/RX port specification

Hi

I have a few questions I couldn't find about radio part of nRF528xx series.

  1. Does all 3 chips have same radio module inside with same characteristics?
  2. Can ANT pin have DC bias during TX/RX? Are there internal ...
(more)

25
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Last activity 2017-12-13 11:17:42 +0100 by paul_tanner

detecting memory issues at runtime

I am using nrf52 with s132 and armgcc As I add functionality to the code I get to a stage where it fails. Linker runs OK but the result fails to execute.

The observable phenomenon is that I see nothing ... (more)

36
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Last activity 2017-12-12 01:41:54 +0200 by ALE

AES CCM encryption by S132 timeslot API

Hi,

I have posted the same question in the following URL. https://devzone.nordicsemi.com/questi...

It will be very helpful if you tell me how to get a correct MIC result by AES CCM mode encryption of nRF52832.

I ... (more)

17
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Last activity 2017-12-07 23:56:59 +0200 by pmeilleur

How can I use Log4View to display the log output from RTT?

I wanted to share the most reliable and efficient method I found to collect and store my log outputs through segger RTT, which also allows using the excellent Log Viewer Log4View, in order to display the segger RTT output from ... (more)

24
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answers
Last activity 2017-12-07 13:17:25 +0200 by Fabian Frei

Thread cli example on nRF52840dk - USB not recognized

I try to run the thread cli example on the nRF52840dk with the SDK_for_Thread_v0.11.0_84a130f.

Windows 10 throws an error like "USB device not recognized / Error trying to get device description" (translated)

  • I tried several USB-Cable, dev kits and ...
(more)

60
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Last activity 2017-12-06 09:41:00 +0200 by ALE

AES CCM encryption by S132 timeslot API

Hi,

I have tested AES-CCM of nRF52832 with reference to the following answered questions.

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

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

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

I have confirmed that the NIST example would produce correct results ... (more)

48
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answers
Last activity 2017-12-05 18:41:10 +0200 by Keith Hammock

Nordic nRF52-DK disconnects from computer when I upload the BIN file

I am attempting to run my first bit of code on my Nordic nRF52-DK and every time I have attempted to upload the code to the board, the board disconnects in the middle of the upload process and then reconnects ... (more)

104
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answers
Last activity 2017-12-05 11:37:11 +0200 by boisi73

DFU Update OTA of an application with ble secure bootloader works only once

Hi, I try to use the dfu update OTA with ble secure bootloader. If the Flash is erased and only the SD v5.0.0 and the own Bootloader are programmed a update OTA is working fine (using nrf Connect ... (more)

29
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Last activity 2017-12-03 22:29:21 +0200 by Daniel Schuler

Running mbed BLE example without debugger attached?

I'm using the nRF52 DK with mbed, running the heart rate monitor demo app.

When I disconnect the board from the PC and attach a USB power supply instead, the nRF52 won't boot. Re-attaching to the PC and ... (more)

63
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1
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answers
Last activity 2017-12-03 21:13:45 +0100 by vladimir

How to change the entrypoint by binary file data in the C program

Hello.

There is an executable file built by setting the address of the entry point (RO_Base) to 0x00000000 with Keil's linker setting.

I converted this executable file into plain binary format data using "fromelf - bin" command.

This binary data ... (more)

33
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no
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answers
Last activity 2017-11-30 10:56:16 +0100 by HoangT

Cannot ping6 nRF52832 using ContikiOS

Hi,

I am implementing ContikiOS on my custom nRF52823 board. I have been following the instruction here: https://github.com/contiki-os/contiki...

I am running Debian 9 testing. I modified the header file pca10040.h to use different pins for ... (more)

51
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answers
Last activity 2017-11-29 23:14:47 +0200 by trigerion

SAADC with soft device and low-power mode

Hello,

yesterday I measured the current of our device and found out that it looks more as a square instead of spikes when no device was connected. Found out that when I established a BLE connection it looks as expected ... (more)

31
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answers
Last activity 2017-11-23 13:45:31 +0200 by m.wagner

Softdevice Assertion with active timeslot API: Infinite retransmission of received package

I'm currently working on an application using the timeslot API to be able to use the radio while it is idle. It is based on the nrf_esb shockburst implementation from SDK13, but somewhat modified. It is mostly running as ... (more)

69
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no
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no
answers
Last activity 2017-11-23 10:54:55 +0200 by Hung Bui

Secure Bootloader with DFU will not start Valid Application

I have been at this for a few days now so I need to ask for help.

Configuration:

  • SDK13

  • SD 4.0.2

  • NRF52832, custom board

  • Linux (Mint) dev system

Actions taken:

(more)

35
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no
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answers
Last activity 2017-11-22 20:42:06 +0200 by Dave_couling

Debugging Hardfault - Registers Not Consistent

I'm trying to debug a randomly occuring Hardfault. In trying to trace down the source I read the CPU registers use the Nordic hardfault_implementation.c which grabs the register values. These values are different then the CPU register values ... (more)

60
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answers
Last activity 2017-11-22 20:13:43 +0200 by jus

nrfjprog --recover fails

Hi all,

I use the nrfjprog 9.7.1 and unfortunately I was used the --rbp command on my nRF52832 and now it's impossible to execute --recover command. The nrfjprog log shows this :

Device "NRF52832_XXAA" selected.
FUNCTION: recover.
FUNCTION ...
(more)

49
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answers
Last activity 2017-11-21 06:57:32 +0200 by Nick

Running Timesync Example on Sparkfun Breakout

I would like to get the timesync example running on the Sparkfun nRF52832 Breakout board.

I can currently download it to the nRF52832 DK using Segger Studio (after making the changes suggested for the project to work with the Segger ... (more)

70
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answers
Last activity 2017-11-20 23:35:35 +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)

114
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no
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answers
Last activity 2017-11-20 21:20:21 +0200 by Mark Bianchi

Determine characteristic handle that caused BLE_GATTS_EVT_HVN_TX_COMPLETE

Our nRF52832 BLE application needs to be able to send large bulk data to a phone app. We have patterned the transfers after the ble_app_att_mtu_throughput example, with data transfer notifications queued up and then the transfer continued in the BLE_GATTS_EVT_HVN_TX_COMPLETE ... (more)

46
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1
vote
no
answers
Last activity 2017-11-18 16:49:34 +0200 by fab

DFU bootloader prevents to load app hex

Hi all,

I am on the DK-52 with the SDK 13.0.0.

After erasing the device, I follow this steps:

1) upload the softdevice

nrfjprog --reset --program s132_nrf52_4.0.2_softdevice.hex --family NRF52

2) upload the bootloader (bootloader_secure_ble)

nrfjprog ...
(more)

75
views
no
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no
answers
Last activity 2017-11-17 22:00:04 +0200 by jublin

FreeRTOS on thingy52

Has anyone tried porting over on of the FreeRTOS examples for the nrf52 sdk onto the Thingy?

I see that it has the port in external/sdk13/external/freertos, but don't see any references anywhere to it.

If it ... (more)

52
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no
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no
answers
Last activity 2017-11-12 11:42:59 +0200 by Constantin

TWI easy DMA with uneven RX buffer width

Hi,

I just tried the example from

https://github.com/Martinsbl/nrf5-mpu...

And they are working like a charm. Now I want to change the example to a version where I can read 4 times the gyro via DMA and ... (more)

33
views
no
votes
no
answers
Last activity 2017-11-10 17:48:40 +0200 by briz

MBR set GPIO pin

I'm using the SD (nrf52) MBR to update our custom bootloader, in a battery powered device.We have some custom hardware which is used to disable our LDO, to enter a "Ultra Low Power" Shipping Mode, this is controlled ... (more)

60
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no
answers
Last activity 2017-11-10 03:56:35 +0200 by Stas

Arduino libraries

What is the easiest way to use Arduino libraries into nrf52 projects in Keil on C? Arduino has a lot minus : bad ide, not support debug mode, not optimize code size. But it has one huge plus, you can use ... (more)

48
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no
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no
answers
Last activity 2017-11-07 18:10:30 +0200 by Mik

How to debug NFC APDUs

Hi, we have implemented the experimental_writeable_ndef_msg example from SDK12.2 with Nordic NRF52 on a custom board. Reading the NDEF Message works fine with smartphones (Android and IOS11 with Iphone 7). We have used NFC in previous Projects together with ... (more)

29
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no
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no
answers
Last activity 2017-11-07 02:54:42 +0200 by Haruki Kawakami

secure bootloader doesn't proceed once it get "Write request too long" error.

Hi,

I'm checking whether SDK 13.0.0 secure bootloader dfu can proceed correctly with iOS DFU library if the process is interrupted because smartphone application is restarted, or ble connection is lost, and so on.

I have tried ... (more)

79
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no
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no
answers
Last activity 2017-11-06 10:38:18 +0100 by Stas

esp32 + nrf52832

Can I consider esp32 (chip with BLE+WIFI) as bluetooth supported wifi router for connect nrf52 to the internet (as we do it with raspberry pi)?

33
views
no
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no
answers
Last activity 2017-10-30 16:21:43 +0200 by paul_tanner

Data transfer via DFU

My example has an in-flash-memory data file that needs to be updated much more often than the code. I thought of using DFU for this and like it says here..

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

.. implementing a new "filetype". Has ... (more)

73
views
no
votes
no
answers
Last activity 2017-10-30 14:28:19 +0100 by Dajgoro

nRF52832 watchdog issue

Hi

I'm trying to implement the watchdog to my project, but I'm having some odd issues. When I power cycle the device the watchdog works fine, but when I program the device through keils Load button (system reset ... (more)

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