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21,591 questions

37
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no
votes
1
answer
Last activity 2017-04-20 16:22:25 +0200 by Stian flag of Norway

Errors Combining examples twi_sensor and ble_app_uart

Hello,

I am using SDK 11.0.0 and attempting to integrate the BNO055 IMU into twi_sensor example and then connecting the IMU data over BLE via ble_app_uart.

I successfully integrated the BNO055 IMU into the twi_sensor example by replacing ... (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)

14
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no
votes
no
answers
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)

39
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no
votes
no
answers
Last activity 2017-04-20 16:08:05 +0200 by telemedcar

best practice for using memory protection unit

Hello,

can you provide a best practice guide on how to use memory protection unit in nRF52832.

I am interested to know if MPU can protect user defined memory regions with access restrictions.

We are planning to use nRF52832 without ... (more)

110
views
no
votes
2
answers
Last activity 2017-04-20 15:31:45 +0200 by sofi_mukhtar

How to use NRF gostudio to flash the nrf51822 RBL dongle? and what is segger ? do i need it

i have RBL nrf51822 ble and i want to try it with BLE Sniffer. i flashed the nrf sniffer hex file by drag and drop to my dongle but it doesn't show anything. only it shows "sniffer ready on ... (more)

72
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1
vote
2
answers
Last activity 2017-04-20 15:29:43 +0200 by Matt

nRF52 unit testing

Dear,

is anyone of the Nordic customers here using unit testing in their nRF52 project and would be willing to share an example project/their setup? Would be awesome.

Many thanks, Josef

34
views
1
vote
1
answer
Last activity 2017-04-20 15:05:38 +0200 by Mikhail

How can I in code read advertising data in S130 nrf51? Mean read manuf data. [closed]

I have S130 nRf51. I advertise any data in the manuf field. And on the central side I want to extract it. How to do it?

38
views
no
votes
1
answer
Last activity 2017-04-20 14:40:32 +0200 by Nabil flag of Belgium

SAADC - NRF_DRV_SAADC_EVT_DONE

Hello,

I'm currently working with sdk 11 on nRF52832.

I'm trying to acquire 20 value from SAADC every 10ms during 300uS.

I think that the rate is too high because p_event->type == NRF_DRV_SAADC_EVT_DONE occur only once per 20 ... (more)

33
views
no
votes
1
answer
Last activity 2017-04-20 14:37:38 +0200 by Jørn flag of Norway

I2S timing

Hi,

I am currently testing a DAC with I2S input supplied by the nRF52832. But unfortunately no signal is coming out from the DAC, furthermore when reading the error registers on the DAC through i2c I get a clock error ... (more)

83
views
7
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)

62
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no
votes
1
answer
Last activity 2017-04-20 14:05:22 +0200 by nordicbeginner

use c++ for nrf51 in keil

hello there i want to use c++ library in nrf51dk project. i am using sdk12. i change main.c to main.cpp but i am getting error.uart_original.rar

i have uploaded code here. In abc.cpp file i declared ... (more)

1k
views
1
vote
5
answers
Last activity 2017-04-20 14:04:30 +0200 by frank1982

File name too long

Hello: When I try to open an example project from nordik, keil doesn't open some files and I get the following error: "no source": Error: #5: cannot open source input file "............\components\serialization\connectivity\codecs\s130\serializers\ble_gatts_evt_rw_authorize_request.c ... (more)

529
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no
votes
3
answers
Last activity 2017-04-20 13:54:55 +0200 by g.joshi

MQTT Example - Settings for publishing while subscribing?

Hi, I use the following.

  • Raspberry Pi 3 (RPi3 with Raspbian Jessie 4.4) as a router,

RPi3 is connected to a Wi-Fi router to access the Internet by using the built-in Wi-Fi BLE BCM43438 chip.

  • IoT SDK 0.9 ...

(more)

51
views
1
vote
1
answer
Last activity 2017-04-20 13:52:00 +0200 by Petter Myhre flag of Norway

PEER MANAGER ext eeprom data storage

hi dear Engineers, I am affraid to use FLASH to manage PEER data, it is wrong way because of Wr op. limitaion. Instead of that, EEPROM or FRAM must be used anyway. How to change PEER MANAGE the Module easy ... (more)

43
views
1
vote
1
answer
Last activity 2017-04-20 13:45:21 +0200 by Kristin flag of Norway

Read NDEF after tag write

Hi,

I am having trouble reading the contents of a record after the NFC tag in the microcontroller has been written by a smartphone.

I'm using the t4t emulator. When the tag has been written the callback gets called ... (more)

41
views
no
votes
1
answer
Last activity 2017-04-20 13:19:25 +0200 by Kristin flag of Norway

nrf52832 uart RX/TX

Hello im building a project for discovering infections through temperature sensors, so im modifying the heart monitor sensor examples (central and peripheral) in the sdk 12 to do that. i want to add a uart code to send data out ... (more)

46
views
no
votes
2
answers
Last activity 2017-04-20 13:16:17 +0200 by Torbjørn Øvrebekk

2 nRF devices connected via UART profile

Is it possible to have two nRF52 devices connected in such a way to send UART data in a bi-directional way.

Would device 1 be a BLE central and the other BLE peripheral? How about if both are peripheral & central ... (more)

38
views
no
votes
1
answer
Last activity 2017-04-20 13:06:07 +0200 by Petter Myhre flag of Norway

L2CAP support for S132

Hi

I am developing an applicaztion with SDK 13.0.0 and S132 for nrf52832 The version of the softdevice to be used with this SDK is 4.0.2, and I need access to L2CAP layer of the protocol ... (more)

97
views
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)

24
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no
votes
no
answers
Last activity 2017-04-20 12:57:04 +0200 by pikachu

Phone disconnect nrf51822 immediately

Hi guys

I want connect nrf51822 (Raytac MDBT40) by my phone(HTC battery one android 4.4.2).

I use softdevice 130(ver.2.0.0) and SDK 11 demo code under KEIL ARM 5. (Nordic Semiconductor\nRF5_SDK_11.0.0_89a8197 ... (more)

15
views
no
votes
no
answers
Last activity 2017-04-20 12:21:55 +0200 by weiqifa

Why can't I use nrf_drv_gpiote_in_init request two pin for irq.

Hi:

When I call nrf_drv_gpiote_in_init to request twice for the pin irq.

but the second irq is not work.

How Can I do ?

Thank you very much.

39
views
2
votes
1
answer
Last activity 2017-04-20 12:21:02 +0200 by RK flag of Singapore

OpenOCD and the NRF not flashing complete HEX file

I'm trying to flash a nRF518122 with a St-Link V2 programmer via Open OCD. The process seems to goes smooth, but comparing the number of written bytes to the actual HEX size are not the same (about a third ... (more)

61
views
no
votes
no
answers
Last activity 2017-04-20 11:50:13 +0200 by Vivek

Receiving onclientconnectionstate() - status=133 on custom Android BLE app that uses NUS service

Hello,

I am receiving the above error on Android BLE app while connecting to my pca10040 based board, and I developed this app with nRF Toolbox as a reference.

I am testing this on multiple Android versions and devices, out ... (more)

26
views
1
vote
1
answer
Last activity 2017-04-20 11:17:49 +0200 by run_ar

Bond information stored multiple times for same peer

Hi,

Peer A is bonded to the device. Now device has Peer A bond information. For some reason, Peer A has un-bonded the device. As device doesn't know this it still keeps the Peer A info.

Here is the ... (more)

83
views
no
votes
no
answers
Last activity 2017-04-20 11:09:37 +0200 by weiqifa

How can I disable the GPIO irq

hi how can i disable the gpio irq, can how can i enable it.

and if i disable one pin irq not effect the other one?

Thank you very much.

39
views
no
votes
1
answer
Last activity 2017-04-20 11:03:18 +0200 by run_ar

NRF_BLE_GATT_MAX_MTU_SIZE > 23 and backwards compatibility

Hello,

I didn't find much information about how different settings for the MTU size behaves with older versions of BLE devices. I'm using the softdevice s132 4.0.2.

/*  Configure the maximum ATT MTU. */
memset(&ble_cfg, 0x00, sizeof ...
(more)

42
views
no
votes
1
answer
Last activity 2017-04-20 10:54:19 +0200 by run_ar

Is it necessary to add inductors in DCC line of nrf in DCDC circuit

I'm designing custom board with nrf51822 SOC & using buck-boost converter for powering nrf chip, If I don't add inductors in DCC line how it will effect my custom board.

I'm attaching through inductors in below pic Pic

43
views
no
votes
1
answer
Last activity 2017-04-20 10:43:13 +0200 by Jørgen Holmefjord flag of Norway

increase Button batteries CR2450 life

hi,all
       my device use CR2450 button battery,advertise time 500ms

TX POWER:4dbm,the battery life is low if it still use this configuration (May be big current lead to the battery internal resistance,so the 17ma can not ... (more)

41
views
1
vote
1
answer
Last activity 2017-04-20 10:26:11 +0200 by Sigurd flag of Norway

Software Reset in nRF52 SDK12.2.0

Hello,

In previous version of SDK, I used to use "sd_nvic_systemreset()" function to reset nRF52, but this function disappeared in SDK12.2.0 .

The question is what the function that I can use to reset nRF52? Thanks.

Sara

74
views
no
votes
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)

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