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27,077 questions

31
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2
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Last activity 2017-11-19 09:03:34 +0200 by max

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?

1
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no
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no
answers
Last activity 2017-11-19 08:21:24 +0200 by Nick

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)

2
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no
votes
no
answers
Last activity 2017-11-19 08:13:39 +0200 by adityaj

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)

4
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no
answers
Last activity 2017-11-19 07:07:27 +0200 by Nick

Programming Sparkfun nRF52832 Breakout with Keil

I can successfully program the nRF52832 Sparkfun Breakout board with the nRF52832 Development Kit using Segger Embedded Studio.

However, when I try to use Keil uVision 5, the board is not being programmed.

I can program the DK with Keil ... (more)

7
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no
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no
answers
Last activity 2017-11-18 23:08:29 +0200 by Arepa

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)

23
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no
votes
1
answer
Last activity 2017-11-18 21:23:15 +0200 by AmbystomaLabs

PCB stackup for NRF52832 two layered board

Hello, I am designing a custom 2layered PCB board with NRF52832 IC. I have followed the reference design given in IC's datasheet as shown in the figure. Please provide the PCB stack up details for 2 layered board.

image description

12
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no
answers
Last activity 2017-11-18 20:34:29 +0200 by Roger flag of South Africa

Multi-tasking and event-handling

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)

14
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1
vote
1
answer
Last activity 2017-11-18 19:00:44 +0200 by endnode

J-Link EDU for nRF52840-PDK, nRF Connect

Can I use J-Link EDU for nRF52840-PDK, nRF Connect, please? Is it sufficient? What the J-Link PRO provides for nRF52840-PDK, nRF Connect that the J-Link EDU does not?

7
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no
answers
Last activity 2017-11-18 18:42:14 +0200 by Dennis German

nRFconnect: My firmwares : how to rename/delete/subfolder

I have many files in the My Firmware directory(?). How do I delete some? How do I rename one? Can a subfolder be created?

8
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no
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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)

27
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no
votes
1
answer
Last activity 2017-11-18 16:48:07 +0200 by AmbystomaLabs

Antenna design guidelines for NRF52832 based board

Hello, I am designing a 2 layer board with NRF52832 IC. I am following all design considerations and reference design mentioned in IC's datasheet provided by Nordic. I have a query regarding antenna. "Application Note AN043 pdf contains reference ... (more)

45
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answers
Last activity 2017-11-18 12:59:36 +0200 by Quest Jelinek flag of United States

nRF52840 Template Project for USB and BLE

With SD140 v6.0.0.6 having been released, will an accompanying example project that demonstrates simultaneous use of BLE and USB be released? Will this be included in the next SDK or if one already exists, could someone post ... (more)

13
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no
answers
Last activity 2017-11-18 11:29:37 +0200 by vikrant8051

PB-ADV & PB-GATT node development using nordic mesh SDK

https://blog.bluetooth.com/management...

The Provisioning Protocol

During provisioning, the Provisioner and the Device to be provisioned communicate using a Bluetooth mesh protocol called the Provisioning Protocol. The Provisioner may use the Provisioning Protocol over either of the PB-ADV ... (more)

18
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no
votes
1
answer
Last activity 2017-11-18 09:38:26 +0200 by endnode

How to know which physical device is disconnected in disconnect event?

Here the connect method is called

err_code = 
    sd_ble_gap_connect(
        peer_addr, 
        &m_scan_params, 
        &m_connection_param, 
        APP_BLE_CONN_CFG_TAG);

In the ble event handler there is the event BLE_GAP_EVT_DISCONNECTED

static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{

    // ... other events

    case BLE_GAP_EVT_DISCONNECTED:
    {
        NRF_LOG_INFO("LBS central link 0x%x ...
(more)

29
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no
votes
1
answer
Last activity 2017-11-18 09:33:11 +0200 by endnode

How to map a gap event to a physical device?

What unique information can I use to know which physical device disconnected for example? Say I have a MAC address or a name encoded into the advertising packet. Correct me if I'm wrong, but connection handles are created after ... (more)

16
views
no
votes
1
answer
Last activity 2017-11-18 09:27:49 +0200 by endnode

Using maximum values for Central and Pehripheral link counts.

Question preamble

I am writing a bluetooth application where two nRF5 devices will be in a master / slave configuration. However, I want to be able to flick a physical button, before powering on the device, that controls wether it starts ... (more)

12
views
no
votes
1
answer
Last activity 2017-11-18 05:58:07 +0200 by Jeff

Segge3 3.3 ble_app_blinky_c_pca10040

storage size of '__stdout' isn't known storage size of '__stdin' isn't known

in retarget.c

11
views
no
votes
no
answers
Last activity 2017-11-18 04:57:58 +0200 by Jeff

SES 3.3 nRF52DK Blinky - basic newbie issues

Installed SES, nRF Go, & SDK.
Programmed s132_nrf52_5.1.0_softdevice.hex

Imported the example. Compiles nrf52832_xxaa_s132 Internal. Launches and gets to memory check

... asked and answered many times. I understand what needs to be done, just not WHERE to do it ... (more)

10
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no
votes
no
answers
Last activity 2017-11-18 03:10:34 +0200 by KaiserYamate

Show a big array using nrf_log module

I use Hercules software to show debug string . Now I want to show an array which have 3000 element. How can I do that?

12
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no
votes
no
answers
Last activity 2017-11-18 00:58:53 +0200 by Aaron

nRF Connect iOS DFU fails for unbonded buttonless DFU service.

I had initially added ble_dfu buttonless DFU support (unbonded) to my app per instructions here: http://infocenter.nordicsemi.com/topi...

Long story short, based on that documentation, I added ble_dfu_buttonless_init() to my app but didn't add ble_dfu_buttonless_async_svci_init() which isn ... (more)

8
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no
votes
no
answers
Last activity 2017-11-17 22:12:43 +0200 by Jason Hendrix

Multiple DFU Transports

More of a suggestion than a question:

Using the info available on the infoCenter, especially here and here, I'm trying to implement a way to dynamically select the DFU transport to be used. I was able to build my ... (more)

18
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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)

15
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no
votes
no
answers
Last activity 2017-11-17 20:16:04 +0100 by Don Schoppe

Monitor mode debug w/ nRF52840, SES 3.3, SDK14.1.0, BLE S140

Hi,

Is anyone successfully using MMD with the nRF52840 PVK, SES 3.3, recent SDK (e.g., 14.1.0) and S140 softdevice?

I followed the steps in this blog post both on Win10x64 and under Ubuntu 16.04x64, but ... (more)

16
views
no
votes
1
answer
Last activity 2017-11-17 20:10:33 +0200 by Joshua

how to set mesh model publish address to a client model which is on other mesh node

I have three mesh nodes in a mesh network, a provisioner, a vendor server model, and a vendor client model.

I know that a provisioner can set client model publish address to a server model address via access_model_publish_address_set(...) if the ... (more)

36
views
no
votes
1
answer
Last activity 2017-11-17 19:59:46 +0200 by John DeWitt flag of United States

Recommandation to quickly test long range and RSSI with nRF52840

HI,

I got 2 nRF52840 dev kits and I'm interested in testing the long range layer (LE coded PHY ) between the 2 modules, also scan for the second module RSSI value.

I was thinking if you can recommend some ... (more)

12
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no
votes
no
answers
Last activity 2017-11-17 19:22:49 +0200 by Torsten Robitzki

Softdevice Update Procedure

Hello,

For the softdevice update, is it the responsibility of the bootloader to make sure, that the softdevice was copied correctly?

If for example the bootloader calls sd_mbr_command() and the device powers down during that copy operations. Is it's ... (more)

21
views
1
vote
1
answer
Last activity 2017-11-17 19:03:15 +0100 by AmbystomaLabs

nRF52840 SAADC real impedance 4,7K ? [closed]

Hi Engineers!

faced with a problem of SAADC impedance too small (4,7K)! We use SINGLE ENDING 8bit mode with following settings:

  • NRF_SAADC_REFERENCE_VDD4
  • NRF_SAADC_GAIN1_4
  • NRF_SAADC_RESISTOR_DISABLED
  • NRF_SAADC_ACQTIME_40US ( 40us)
  • Vdd = +3.3v

it means, INPUT RANGE = (VDD/4)/(1/4) = VDD = 3 ... (more)

12
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no
votes
no
answers
Last activity 2017-11-17 19:02:15 +0200 by stephens

Key Fob Beacon

Does anyone know of any nRF52832 devices designed for use as a key fob?

The Thingy52 looks great but it's a little big and I don't need all of those sensors. Also, I'd prefer not to develop ... (more)

15
views
no
votes
1
answer
Last activity 2017-11-17 18:46:00 +0200 by AmbystomaLabs

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)

23
views
no
votes
1
answer
Last activity 2017-11-17 17:01:42 +0200 by akash

Eclipse version

Hi, I recently purchased nrf52 development board for debugging nRF52832. I was following your tutorial "Development with GCC and Eclipse" and it is not working for me. Can you tell me the version of eclipse you used in the tutorial ... (more)

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  • Resolved questions: 10974
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  • Total questions: 27077