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22,463 questions

69
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no
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1
answer
Last activity 2017-05-30 08:36:26 +0200 by Kristin flag of Norway

Which are different memory storage option?

Hello, I am using pca10028 and sdk 12.2. I have interfaced temp sensor with nrf51 and now I want to store that data continuously in memory of nrf51. I want to store min 4k sample consisting of 2 bytes ... (more)

32
views
1
vote
1
answer
Last activity 2017-05-30 07:07:18 +0200 by myjtag

Unable to program the NRF51422 using J-link

Hi The j-link detects the chip, but for not obvious reason the j-link and keil will trough an error when I want to program the chip, here is the j-link out put. do you have any idea?

Load "C:\Users ...

(more)

122
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1
vote
2
answers
Last activity 2017-05-29 22:12:15 +0200 by Roger flag of South Africa

nRF52840 development kit Li-Po battery

Dear All,

I would like to order Li-Po batteries for my nRF52840 development kits and need some information. From the battery, what type of female battery connector is needed to plug into the board?

Kind regards,

Roger

29
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no
votes
no
answers
Last activity 2017-05-29 18:29:50 +0200 by Nathan Morsa

GATTS table size - inconsistant RAM start

Hello,

I am developing a profile which includes 39 characteristics spread over 4 services on nRF52840/SD140/SDK13. When I add one too many, sd_ble_gatts_characteristic_add() returns NRF_ERROR_NO_MEM. Reading upon this issue led me to believe that I could simply tweak ... (more)

57
views
2
votes
2
answers
Last activity 2017-05-29 18:29:04 +0200 by DerPMO

peer manager database : N_WRITE_BUFFERS = number of connected peers?

I didn't find any documentation in the peer manager for the need of this write buffers. I do understand, that peer device data is stored there before written to flash. But how big has this buffer to be? I ... (more)

220
views
2
votes
1
answer
Last activity 2017-05-29 17:59:18 +0200 by angel

Apparently two channels are colliding?

Dear Nordic,

Device: nRF51422. Protocol: ANT+. Softdevice: S210 v5.0.0

I have 3 devices: two masters (No. 1 and 2) and one slave (No. 3). In my application, I pair the slave to the two masters, store both channels ... (more)

34
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2
votes
1
answer
Last activity 2017-05-29 16:41:38 +0200 by Sigurd flag of Norway

nRF Toolbox app for Android and service tutorials

Hi guys

I am programming nrf51822 demo board with sdk11 and try to finish service tutorials.

I finish all step in service tutorials and try to get service information by nRF Toolbox.

I expect getting "Scan Response Data" service in ... (more)

39
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no
votes
1
answer
Last activity 2017-05-29 16:41:24 +0200 by Jørn flag of Norway

Delay time bewteen two transfer

Hi guys

I am using SPI example code in SDK11 (./nRF5_SDK_11.0.0_89a8197\examples\peripheral\spi) with nRF51 DK.

It works fine when send first data.

But it get in trouble when I send data(nrf_drv_spi_transfer) continuously.

I find it ... (more)

34
views
2
votes
1
answer
Last activity 2017-05-29 16:38:19 +0200 by Sigurd flag of Norway

Sniffer device compatibility

Hi guys

I have one nrf 51822 demo board.

And I want to buy one more board as BLE sniffer.

Can I use a nrf52832 demo board as sniffer to grab packet between phone and nrf 51822 demo board.

Is ... (more)

61
views
no
votes
1
answer
Last activity 2017-05-29 16:30:04 +0200 by Francesca

Let the nrf51822 wake up after 3 hours

Hi, I beginning now to program nrf51822. I would like to let the nrf51822 wake up after 3 hours by using a software timer interrupt. Should I use power_manage()? Before each power_manage() call, I stop all timer running. Current consumption ... (more)

26
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no
votes
no
answers
Last activity 2017-05-29 14:24:40 +0200 by Ievgenii Meshcheriakov

nrf52840 antenna with DC path to ground

Hello,

I'm currently designing a board with nRF52840 and I'd like to use an antenna that is a DC short to ground. Do I need a DC blocking capacitor in such configuration or is it ok to connect ... (more)

96
views
3
votes
1
answer
Last activity 2017-05-29 13:35:41 +0200 by Sigurd flag of Norway

PDM working example

hi, Is there any working PDM example for nRF52832? or can anyone give a sample initialization code for PDM with easyDMA using the inbuilt nrf_pdm_drv functions?

Regardss, Vishnu

50
views
no
votes
1
answer
Last activity 2017-05-29 13:26:47 +0200 by Kristin flag of Norway

NRF52 S123 QDEC sample period - SDK 12.2.0

I am developing an application which involves control of a brushed DC motor with a quadrature encoder. According to this post, in SDK 12.2.0 - which I am using - it is possible to set the sample period to 128 ... (more)

25
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no
votes
1
answer
Last activity 2017-05-29 12:23:16 +0200 by Kristin flag of Norway

nRF52840 & ble_app_att_mtu_throughput

Hi, I am trying test nRF52840-pdk throughput.

-I loaded softdevice s140_nrf52840_5.0.0-3.alpha_softdevice.hex into nRF52840-pdk using nRFgo

-Then I build (using uVision) the file ...\nRF5_SDK_13.0.0_04a0bfd\examples\ble_central_and_peripheral\experimental\ble_app_att_mtu_throughput\pca10056\s140\arm5_no_packs\ble_app_att_mtu_throughput_pca10056_s140.uvprojx

-Finally, I ... (more)

16
views
1
vote
no
answers
Last activity 2017-05-29 12:13:15 +0200 by Milos Lovric flag of Serbia

nRF8001 setup files generation

Hi,

I'm trying to configure custom local GATT server on nRF8001 device. I added a custom service with multiple characteristics, but I can't generate source files. It says error code: 0x03, but I can't find what does ... (more)

29
views
no
votes
1
answer
Last activity 2017-05-29 11:24:37 +0200 by Torbjørn Øvrebekk

nRF24L0+ CRC

Hi, the datasheet for the nRF24L0+ says that the CRC is the mandatory error detection mechanism in the packet (page 28). Being that CRC can be enabled or disabled via EN_CRC in the CONFIG register, what does 'mandatory' mean?

There ... (more)

38
views
no
votes
1
answer
Last activity 2017-05-29 10:47:54 +0200 by Kristin flag of Norway

gpiote handler - disable momentarily to run critical section

With calls to these functions: nrf_drv_gpiote_init() nrf_drv_gpiote_in_init() nrf_drv_gpiote_in_event_enable() I have a handler (interrupt) routine that services a CAN bus chip on SPI bus. The handler runs when the chip's interrupt output, connected to a nRF52 GPIO input, goes from ... (more)

106
views
6
votes
2
answers
Last activity 2017-05-29 10:18:43 +0200 by Olivier

Best way to send data from many sensors

Hi,

For an application I have a nRF51 at my disposal and I need to transfer about 3'000Bytes. I found in the documentation that the nRF51 can use the S130 SoftDevice which support BLE 4.2. The data I ... (more)

47
views
no
votes
1
answer
Last activity 2017-05-29 10:17:39 +0200 by Jørgen Holmefjord flag of Norway

Flashing Interface MCU for nRF52PDK

Hi,

May I know, How to flash the firmware for ATSAM4 which is used for flashing and debugging nRF52840. And also how to get the firmware?

20
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no
votes
no
answers
Last activity 2017-05-29 09:59:34 +0200 by sijohans

Second characteristic write wont be received (From Android)

Hello,

I am using an Android application to send data to a nRF52 board. The nRF52 board is the peripheral and the Android phone is the central. This is the link establishment process:

  1. Connect
  2. Negotiate MTU
  3. Discover services
  4. Enable notifications ...
(more)

35
views
no
votes
1
answer
Last activity 2017-05-29 09:50:45 +0200 by Hung Bui

How can I transfer "useful data" by throughput example( nRF52840).

I just test nRF52840 DK with ble_app_att_mtu_throughput_pca10040_s132 example. I know BOARD_TESTER transmits 1024 dummy kbytes to BOARD_DUMMY. I want to replace dummy byte by my data. How can I do this? Thanks for your help!!!

23
views
no
votes
1
answer
Last activity 2017-05-29 09:40:49 +0200 by Kristin flag of Norway

Hang on BLE connect - custom service SDK13 migration

I'm migrating from SDK11 to SDK13. My custom service is based off Heart Rate Service, so I started from the new SDK13 example of HRS, and updated all the initialization code following the new example.

Changed: ble_cg.common_cg.vs_uuid__cfg ... (more)

178
views
no
votes
1
answer
Last activity 2017-05-29 09:29:38 +0200 by Kristin flag of Norway

PCB antenna

Hello,

I want to design PCB antenna for nRF52832 chip. I took reference from nRF51 dongle hardware layout. I wanted to spread antenna upto 18mm width so I reduced the height of antenna increasing the width of it, but the ... (more)

32
views
1
vote
1
answer
Last activity 2017-05-29 08:51:36 +0200 by Jørgen Holmefjord flag of Norway

Is Zephyr I2c Master Supported pca10040

Just want to confirm I can be i2c master with zephyr rtos for nrf52 pca10040.

In link (https://devzone.nordicsemi.com/blogs/...) titled "nRF5x support within the Zephyr Project RTOS"

Device Drivers

"Broad range of external sensor drivers for common ... (more)

47
views
1
vote
1
answer
Last activity 2017-05-29 08:37:05 +0200 by Kristin flag of Norway

nrf52840 DK transfer speed!

Hello everybody! I have one nrf52840 DK and nrf528323 DK. I was flashed and test throughput example. I reach 450kbps. ( transfer 1Mbyte in 18s). Can I enhance this speed? and how?

135
views
1
vote
1
answer
Last activity 2017-05-29 08:05:05 +0200 by Maxim flag of Russian Federation

Run BLE & Thread on nRF52840

Hi,

We are interested in nRF52840 and we know that nRF52840 supports both on IEEE 802.15.4(Thread, ZigBee) and IEEE 802.15.1(BLE).

However, does nRF52840 can run BLE and Thread/ZigBee at the same time?

What ... (more)

40
views
no
votes
1
answer
Last activity 2017-05-28 21:12:20 +0200 by endnode

Antenna for the beacon

Hi,

Is it possible to add additional antenna on the beacon ( NRF51) in order to increase the range ?

If yes kindly let me know the list of available or recommended antenna for this purpose.

36
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no
votes
2
answers
Last activity 2017-05-28 18:02:28 +0200 by endnode

BLE Relay concurrently issue

Hello i am using BLE Relay example with softdevices 132 and sdk version 13. i make this example simple, no more connection. just adverting and scanning continuously. here is scan parameters.with these parameters i am losing packet.

#define SCAN_INTERVAL ...
(more)

54
views
no
votes
1
answer
Last activity 2017-05-28 07:42:54 +0200 by Carsten Wulff

Battery_level_error

Hello ,I work with the sdk 12, I have a program to contoler the level of battery, it works, except that I recode 3870 mV (with USB) and when I measure the pin VDD I find 2.88. I do ... (more)

26
views
no
votes
1
answer
Last activity 2017-05-28 02:32:00 +0200 by endnode

Gazell nRF51822

Does the s210 softdevice not function on the nRF51822? I see it available for the nRF51422 here but it is listed under the 51422 only.

I have a v1.1.0 PCA10031 (nrf51422) and have written an LED blink example ... (more)

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