RSS
Sort by » date activity ▼ answers views votes

3,803 questions

38
views
no
votes
no
answers
Last activity 2017-11-30 10:58:32 +0100 by Stayhungry

RTT viewer & interrupt

Will uarte interrupt call NRF_LOG_INFO, will run away the possibility of the processor? backend uses RTT

I set uarte receive dma buffer to 10, then the sender to use the 1M baud rate, continue to send data, I log in ... (more)

33
views
no
votes
no
answers
Last activity 2017-11-30 10:56:16 +0200 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)

25
views
no
votes
no
answers
Last activity 2017-11-30 08:16:42 +0100 by toru148

ble_app_att_mtu_throughput, there is no write characteristic

Hi, I am working with ble_app_att_mtu_throughput sample for finding out max transfer speed on BLE4.2. I also need to write central part of this sample on iOS.

I try to find write characteristic on this sample. But I only ... (more)

36
views
no
votes
no
answers
Last activity 2017-11-30 07:55:34 +0100 by Sourabh Barve

Changing UART pins for nRFSniffer

We have certain boards having nRF51 onboard. We want to use them as sniffer. Unfortunately, pins that are used for UART on nrf51DK board are not accessible on our boards. This makes the .hex file provided in the nRFSniffer package ... (more)

41
views
no
votes
no
answers
Last activity 2017-11-30 04:40:33 +0200 by siivv

thingy:52 temp fluctuation

I am seeing some significant temp fluctuation for the temp sensor on the thingy to the tune of +-1 to 2 deg celsius. This is when placing the device in a closed, sealed container. Is this to be expected? Do ... (more)

44
views
no
votes
no
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)

42
views
no
votes
no
answers
Last activity 2017-11-29 22:56:54 +0100 by SRose

Unable to get FatFs example working nRF52840 SDK14.2

I am unable to get the FatFs example working for my nRF52840 dev kit board using the latest SDK14.2. I have determined this is related to the type of SD Card that is inserted. Only 1 out of the ... (more)

39
views
no
votes
no
answers
Last activity 2017-11-29 22:54:12 +0100 by sami_cala

nRF52832: How to Include the "arm_math.h" library

Hello,

I'm attempting to include the "arm_math.h" library so that I can use the requisite DSP functions, etc. I'm getting a linker error so I'm not sure what else needs to be done to resolve the ... (more)

22
views
no
votes
no
answers
Last activity 2017-11-29 15:47:57 +0100 by Jonathan

DFU, init packet and protocol buffer

I generated a package with the following command:

nrfutil pkg generate --hw-version 51 --application-version 1 --application nrf51822_xxac.hex --sd-req 0x87 --key-file private.key app_dfu_package.zip

I want to read its .dat file using Java.

I've compiled the .proto file ... (more)

26
views
no
votes
no
answers
Last activity 2017-11-29 14:25:21 +0200 by Hrushi

How to change the peripheral depends on battery level?

Hello All,

We have One central device and four peripheral devices. From every peripheral device we are transmitting battery level.

I want to change the peripheral or want to connect to other peripheral when the battery level of connected peripheral ... (more)

27
views
no
votes
no
answers
Last activity 2017-11-29 14:01:00 +0200 by fares elec

error: #59: function call is not allowed in a constant expression

any one can help me to fix this erreor please image description

............\components\ble\ble_services\ble_nus\ble_nus.c(41): error: #59: function call is not allowed in a constant expression

24
views
no
votes
no
answers
Last activity 2017-11-29 10:29:13 +0100 by yuyixuantai

why my nrf51822-board current in sd_app_evt_wait() is up to 9uA?

  1. In sd_power_system_off(),the nrf51822-board current is 2uA;And I think the current in sd_app_evt_wait() will be ~4uA(Is it correct)?
  2. In sd_app_evt_wait(), the code is same as to in sd_power_system_off(). And I sure I close uart and there is no ...
(more)

31
views
no
votes
no
answers
Last activity 2017-11-29 10:28:18 +0200 by Sivaguru Ravi

ble_app_hrs given in sdk nrf51822 not working.

Hi, I am working on the nrf51822 board and i am only the PAC20006 board version seems to be working on it. I am using sdk 11 and soft device version s130_nrf51_2.0.1 s suggested in the compatibility matrix ... (more)

33
views
no
votes
no
answers
Last activity 2017-11-29 02:22:47 +0200 by vam5104

Issue with MPU9250 and nrf52

Hi,

I have been working on MPU9250 examples given in here.Though the program runs fine in KeilUvision 5, the output in tera term shows only 0,0,0 for Accelerometer values in X,Y and Z. I connected the ... (more)

38
views
2
votes
no
answers
Last activity 2017-11-28 22:21:12 +0200 by MichaelNordicUser

App crashes in ble_stack_init()

I am trying to execute code that broadcasts (uses the Soft Device Ble stack) on target nrf52832 boards connected to the PCA10040.

I am successful uploading a program (that does not use Soft Device) and have it execute on three ... (more)

51
views
no
votes
no
answers
Last activity 2017-11-28 17:11:48 +0200 by ToasTer86

"nrf_mesh_on_ble_evt"

Dear devzone,

I am currently merging the Mesh SDK into the normal SDK to run BLE & BL mesh concurrently. Followed multiple guides to get it working, at this moment I am able to receive BL mesh packets and messages until ... (more)

42
views
2
votes
no
answers
Last activity 2017-11-28 16:04:54 +0200 by Andy

How to enable notifications on a characteristic with nRF Connect iOS app?

Hello,

I don't know how to enable the notifications for a characteristic in the nRF Connect app for iOS. I have the latest version and I tried all the buttons but none of them seem to enable them.

I ... (more)

171
views
no
votes
no
answers
Last activity 2017-11-28 14:14:40 +0200 by Looongcat flag of Ukraine

NRF52832 and NRF52840 Software compatibility

Hi guys!

I want to select NRF52840 as my target platform. Is it possible to start software developing on 52832 (for which I have devkit) and then seamlessly move my code to 52840 when I'll have proper devkit or ... (more)

33
views
no
votes
no
answers
Last activity 2017-11-28 11:17:40 +0200 by nikunj8086 flag of India

how to receive multiple services data from NRF thingy52 to a nrf52840 central device ?

hi,

i doing a program to receive multiple service data from nrf thingy 52 to nrf52840 central device.

as of now i have implemented weather service, motion service and battery service, but i am only able to receive data of ... (more)

30
views
no
votes
no
answers
Last activity 2017-11-28 09:18:54 +0200 by Constantin

TWI Switch between easyDMA and normal read

Hi,

I am reading a BMX055 via I2C which consists of three sensors with three addresses. I got the easyDMA running to read 10 times the gyro using the PPI and the data ready interrupt. Now after 10 readings I ... (more)

27
views
no
votes
no
answers
Last activity 2017-11-28 05:46:21 +0100 by abhinav

how to implement nrf52840 serial and open thread together

Hi, I am getting data over thread and BLE network. I want to send the received data over uart. Is it possible to use serial example to merge with thread server example? If yes please let me know the changes ... (more)

60
views
no
votes
no
answers
Last activity 2017-11-27 16:40:39 +0100 by spizzak

Eclipse Registers Missing

I'm trying to debug a project I recently migrated to eclipse but my Peripheral Registers are empty with the error message "There are no peripherals descriptions available, install the required packs". Can someone guide me as to how to ... (more)

35
views
no
votes
no
answers
Last activity 2017-11-27 15:07:44 +0200 by Martin Børs-Lind flag of Norway

NRF51822 UART hangs and requires power cycle

Hi,

I am making a GPS tracking system using NRF51822-QFAC. I am using 2 UARTs, one of the (external) GPRS IC and one for (external) RS485 communication.

The UART peripheral hangs after some time. I don't know if it ... (more)

48
views
no
votes
no
answers
Last activity 2017-11-27 10:59:09 +0200 by Aylik

nRF52840 SDK14.x nrf usb driver problem

Hi Engineers!

We used SDK13 for our Project (multilink BLE with 1xServer & 4x PeerS) and now move to SDK14.2, almost done except only USBD.

  1. if we use SDK13 driver , our PC aplication (HID EP1) works very stable (we use ...

(more)

17
views
no
votes
no
answers
Last activity 2017-11-27 09:28:48 +0100 by konstantin

Problems with nfc_t2t_lib_iar.a library

Hi.

Windows10x64 + IAR 8.20 + nRF5_SDK_14.2.0_17b948a

I have problems with building examples for PCA10040 (nRF52832 DK).

Linking Error[Lt009]: Inconsistent wchar_t size nfc_t2t_lib.o(nfc_t2t_lib_iar.a) has wchar_t size 16 bits app_error.o and 36 other objects, some ... (more)

36
views
no
votes
no
answers
Last activity 2017-11-27 09:16:35 +0200 by Olivier

nRF52832 not starting after successful transfer using secure_dfu_ble_s132_pca10040 example

Hi,

I tried to make a software update (I tried application, bootloader, SoftDevice and any combinations) over BLE using the secure_dfu_ble_s132_pca10040 example but after the successful transfer the nRF52832 does not start any more.

In order to debug the error ... (more)

57
views
no
votes
no
answers
Last activity 2017-11-27 05:23:51 +0100 by zkt-1400

app_timer_stop()でNRF_ERROR_NO_MEM発生

on_ble_evt関数内でapp_timer_stop()を複数実行するとapp_error_handler_bareが発生しリセットされる。 APP_TIMER_USER_OP_SIZEの値を変えても解決しませんでした。 なぜだかわかりますか?

36
views
no
votes
no
answers
Last activity 2017-11-25 22:56:42 +0100 by Anesh

Erased J-link firmware from interface MCU

I was trying to update J-link firmware (using link [https://devzone.nordicsemi.com/questi...] ) into interface MCU (MCU between PC and nRF52 uC responsible for downloading code into nRF52 uC) but accidentally erased bootloader firmware. Now, nRFGo Studio is not ... (more)

48
views
no
votes
no
answers
Last activity 2017-11-24 16:35:28 +0100 by Jakub J.

pca10056 usb device

Hello

Recently I bought two PCA10056 boards in order to explore USB capabilities of new nordic chips. I've tried usb device examples supplied with SDK v14.1 and v13.1 on both of them and unfortunately only one board ... (more)

108
views
1
vote
no
answers
Last activity 2017-11-24 16:12:03 +0100 by ndarkness

pm_init hides real cause of error

Hi Nordic,

I have recently received an error from pm_init that I have never seen before, NRF_ERROR_INTERNAL. After some debugging, I found it was really due to NRF_ERROR_STORAGE_FULL (I'm not sure how it got to this state).

Why does ... (more)

Statistics

  • Total users: 25645
  • Latest user: wisadsud
  • Resolved questions: 11252
  • Unanswered questions: 3810
  • Total questions: 27773