14,376 questions

no
views
no
no

nRF51822 - S130 : how do I check timer2 is running or stop

1. How do I check timer2 is running or stop ?
2. I try to measure timer current after I program nrf_drv_timer_pause () or nrf_drv_timer_disable(), The two conditions current is same. But I look for specification that timer2 is setted stop still high current ...
(more)

2
views
no
no

HardFault_Handler when I use WDT

Hi,

I'm using SDK 13.1 and SD 4.0.5 and I add to my code the WDT example of the SDK, but the code doesn't work, and when I debug, the code is stucked in HardFault_Handler ... (more)

4
views
no
no

Communication between pca10040 and another device using UART

Hello,

I would like to establish communication between my pca10040 and my cellular modem. Currently I am using ble_app_uart on the peripheral example and I can put messages and get messages via UART manually (opening tera term with pca10040's ... (more)

8
views
no
no

How to access the RAM of nrf52832

Now I want to access the RAM of nrf52832 with pdm digital microphone, I need to put the RAM data to the RF data buffer,is there any good way to slove the problem? Accroding to the datasheet,the PCM ... (more)

13
views
no
no

Job Offer: nRF / Embedded Developer in Stuttgart, Germany

Hello,

not sure if this is allowed here, but I thought I'd try at least :-)

We are currently looking for an Embedded / nRF Developer in Stuttgart that will help us to further develop FruityMesh (https://github.com/mwaylabs/fruitymesh ... (more)

19
views
no
1

nrf5x eclipse in linux again

this issue might also be one of others than myself

my main development environment is based on linux ... firmware, QT, android and whatever comes along ... i used to write firmware starting with the 8085, z80, 68k and for the last ... (more)

36
views
no
1

PCB antenna and J1 connector

Hi all,

I'm trying to measure the transmit power of nRF51 development kit with a spectrum analyzer and I am facing the following issue:

It is specified in the user guide of nRF51 that "When connecting the test probe ... (more)

14
views
no
1

Central Scan Continuously and Peripheral/Beacon Broadcast

Hi all,

I have a use case where I have about 40 buttons that can be pressed anytime. I need know when these buttons are pressed on multiple receivers devices. So every receiver device needs to know the status of ... (more)

25
views
no
1

Nordic Bluetooth 5 (nRF52832)

Hi , I would like to know about Bluetooth 5 compatibility with smart phones having Bluetooth 4.x The observation is- a)the android application scanning for BLE device finds the device with Bluetooth 4.2 faster where as app is ... (more)

12
views
no
no

IS BLE MESH SUPPORT ARDUINO PRIMO CORE?

Hi All,

I new to BLE, Currently working on Arduino Primo Core. I wonder is there any support or any SDK available for PRIMO CORE to use BLE MESH.

17
views
no
no

change MAC address in ble_app_beacon example

Greetings,

For my application,I need to change the nrf51's mac address. Previously I have changed the MAC id using the following code,

11
views
no
no

High PER at 2Mbps

Hi,

Scenario:

Two nRF52832DK boards on a table, approx 20 cm from each other, +4dBm output power.

Running at 1Mbps gives me less than 0.1% PER, running at 2Mbps gives about 25% PER. (everything else ... (more)

58
views
no
1

fds_record_update sometimes always returns FDS_ERR_NO_SPACE_IN_FLASH

Hi,

I'm using FDS instead of pstorage. FDS version is SDK13.0.0. fds_record_update sometimes always returns FDS_ERR_NO_SPACE_IN_FLASH though I call fds_gc after it gets FDS_ERR_NO_SPACE_IN_FLASH every time.

static void fds_evt_handler(fds_evt_t const * const p_fds_evt)
{
if (p_fds_evt->result != FDS_SUCCESS ...
(more)

8
views
no
no

Hello! I am using application that support ANT+ and BLE, so i am using s332 softdevice. now I want to add BLE bootloader feature. (send .bin via BLE). but in SDK v13.0.0-1, BLE Secure DFU Bootloader support only ... (more)

9
views
no
no

[Bug Report] Memery Manager Library XXLARGE Blocks doesn't work

When I only used XXLARGE block, I got bellow error:

..\..\..\..\..\..\components\libraries\mem_manager\mem_manager.c(484): error:  #94-D: the size of an array must be greater than zero
static uint32_t m_mem_pool[
LOCK_BITMAP_ARRAY_SIZE];                                                /**< Bitmap used for book-keeping availability of all blocks ...
(more)

10
views
no
no

feed line width for NRF52832 custom board

Hello, I am designing a PCB with NRf52832 IC. I have a query regarding the width of the feed line. In reference design files, the width of the feed line is 30mil. I have calculated the feed line with to ... (more)

59
views
no
2

HI,

We connect our own board with nrf51 via UART. From the host board, I call sd_ble_gap_rssi_start() first. I can see BLE_GAP_EVT_RSSI_CHANGED happens. Then I call sd_ble_gap_rssi_get(), but nothing happens. It seems the program blocks.

The following is my code ... (more)

12
views
no
no

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)

20
views
no
no

Hi,

I am trying to use the SAADC via ble when noridc is connecting with other device and adding value to advartasing. This is my code but i've got some problems.

AFTER EDIT

void saadc_callback(nrf_drv_saadc_evt_t const ...
(more)

21
views
no
no

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)

27
views
no
1

What is the meaning of "application processing" ?

Hello, I use sdk 8.0.0 and s110. I read this blog

And I did not understand some terms;

1. Application processing(for example 2ms each adv interval)
2. Number of packets to send in each connection interval(for example 1 ...
(more)

19
views
no
no

Is there a way to increade data rate from BLE device ?

Hi,

I'm retreiving data from my Running Speed and Cadence BLE device to my Android smartphone. The BLE device is the Polar Stride.

The problem I have is that the data I receive is only sent every seconds. Is ... (more)

12
views
no
no

How to delete specific peer?

I met a problem when delete bonding information on android central, i actually can't connect to the nrf52832 peripheral again, until i totally clear it's peer list and bond again. If i don't do this and try ... (more)

16
views
no
no

nRF51822 ，cannot find headers which were involved in imported into keil5

as this screenshots show, i add some headers to nRF_Libraries, and add the directory of the folder nRF_Libraries to Options for targets /c++/include paths,but after building project,I cannot open the header , e.g. boards.h by rightClicking ... (more)

1k
views
1
vote
1

GATT error 133 (0x85)

Hi All, Am using SDK 11.0.0.89a8197 Device Manager, I get this error very randomly .. My case is I allow only one device to bond with me , After bond I always advertise with Whitelist .. If the user need ... (more)

17
views
no
no

I2C Write issue

I am facing some issue while writing to i2c. On first i2c write , device is working but after that when i tries to write anything, code is stucking in loop.

void sensor_sleep_mode(void)
{
ret_code_t err_code;
uint8_t buff[2]={0x06, 0x01 ...
(more)

49
views
1
vote
2

Can the device reset without going through NVIC_SystemReset()?

Some situations like heavy ble activity causes the nrf52832 to restart without hitting breakpoints in the NVIC_SystemReset.

Assuming there aren't any hardware issues, is it possible for a device soft-reset without going through the core_cm4.h NVIC_SystemReset call?

20
views
1
vote
no

Issues running imported Keil project in Segger Studio

I tried importing the Keil 5 SDK 13 project from https://github.com/nordic-auko/nRF5-b... into Segger.

I followed all the directions from https://devzone.nordicsemi.com/blogs/... However, I did have to reverse the thumb_crt0.s modifications of adding ... (more)

14
views
no
no

BLE_GAP_SEC_STATUS_DHKEY_FAILURE numeric comparison

Hi I, moved from a two nrf52 sdk13 central and peripheral with not display or I/O caps, to two connected to a PC and using UART for the I/O like the multi_role_lesc example.

When my two devices are ... (more)

21
views
no
no

Hello Everyone,

It is unclear to me how a soft-device operates regarding multi-tasking and event-handling. I'm assuming Nordic engineers have their own real-time operating system in place for their soft-devices whereby tasks and events are executed based on some ... (more)

Statistics

• Total users: 25344
• Latest user: Max Wrenn
• Resolved questions: 10981
• Total questions: 27095

Recent blog posts

• Estudando Projetos do SDK 10 para nRF5x com Eclipse Oxygen (Portuguese)

Posted 2017-11-12 00:08:55 by Carlos Delfino
• Configurando o Eclipse Oxygen para Desenvolvimento com nRF5x (Portuguese)

Posted 2017-11-10 21:15:47 by Carlos Delfino
• How to use Git for embedded software development

Posted 2017-11-06 13:21:55 by Yaniv Nis
• Thingy:52 based Weather Station

Posted 2017-10-29 22:31:15 by Krzysztof Szewczyk
• How to build continuous integration and delivery process for embedded SW development

Posted 2017-10-03 11:01:29 by Yaniv Nis

Recent questions

• nRF51822 - S130 : how do I check timer2 is running or stop

Posted 2017-11-20 10:18:36 by CFF.K
• HardFault_Handler when I use WDT

Posted 2017-11-20 10:00:57 by abosch
• Communication between pca10040 and another device using UART

Posted 2017-11-20 09:55:59 by lirank
• How to access the RAM of nrf52832

Posted 2017-11-20 09:42:04 by 执剑写春秋
• Job Offer: nRF / Embedded Developer in Stuttgart, Germany

Posted 2017-11-20 09:40:23 by Marius Heil