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16,752 questions

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Last activity 2016-09-29 10:04:39 +0200 by kvrb

Reading LIS2DH accelerometer sensor data to nRF51822 MUC

HI,

I am reading LIS2DH accelerometer sensor data to nRF51822 MCU and displaying on hyper terminal. The LIS2DH sensor gives output in the form of digital through SPI or I2c. I am configuring through SPI. The problem is whenever accelerometer ... (more)

26
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1
answer
Last activity 2016-09-29 10:00:17 +0200 by Jørgen Holmefjord flag of Norway

What do the MDK Installers Change?

Can someone please explain what the MDK installers that come with the SDK change or add?

Thanks

40
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1
answer
Last activity 2016-09-29 09:44:18 +0200 by Bjørn Spockeli flag of Norway

DALI on nRF5x

Does anyone have experience with implementing a DALI slave and/or master on the nRF5x? I can find several starting points on the internet, but was wondering about your experience.

13
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1
vote
1
answer
Last activity 2016-09-29 09:39:13 +0200 by Sigurd flag of Norway

limit packet number per connection interval

Hi, I knew I can send multi packets per connection interval. Can I limit 51822 only send "one" packet per connection interval?

20
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1
answer
Last activity 2016-09-29 09:37:25 +0200 by Jørgen Holmefjord flag of Norway

nRF51 GPIO interrupt

Hello,

I am having interface nRF51 with RF receiver. Output of RF receiver connected with GPIO pin of nRF51.

How can I detect interrupt on gpio pin?

Thanks & Regards, Rajneesh

20
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1
answer
Last activity 2016-09-29 09:37:15 +0200 by Jørgen Holmefjord flag of Norway

How to use Interrupt in BLE Central

Hi all Nordic Developer,

Currently I am working on nrf51-dk(as a BLE central) and I wish to connect one of its pin to a power supply(as a input). If the power breakdown, it should send out a warning ... (more)

34
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votes
1
answer
Last activity 2016-09-29 08:34:29 +0200 by Jørgen Holmefjord flag of Norway

Error: Flash Download failed - "Cortex-M4" with SDK 12 & ANT s212

Hi

Today I have recieved the new nRF52 Development kit PCA10040. I have downloaded the latest version of SDK nRF5_SDK_12.0.0_12f24da working with ANT_s212_nrf52_2.0.0.

I was able to successfully compile the Blinky example, but when I flash ... (more)

10
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answers
Last activity 2016-09-29 08:23:57 +0200 by oneguy

S132 Attribute Table Size

Hi,

referring to the SoftDevice Specification, S132 Softdevice vx.0, paragraph 15.2 (Attribute table size) I wonder how one does work out the size of the attribute table.

The reference given at the bottom of the paragraph refers to ... (more)

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Last activity 2016-09-29 08:15:09 +0200 by oneguy

nRF52 antenna design review

Hi,

we are now in the second round of prototyping - we'd like to move away from the chip-antenna based design to a PCB antenna. We have come up with two different ideas (see images enclosed).

Would anyone at Nordic ... (more)

16
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Last activity 2016-09-29 05:22:29 +0200 by hengyongchao

Does nRF51-ble-broadcast-mesh can be used in SDK10?

Github said it works in sdk8.1, But I place it under *nRF51_SDK_10.0.0_dc26b5e\examples* It works well in the demo board. Question,Can it be used in sdk10? What I want to do this in sdk10 because I ... (more)

12
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answers
Last activity 2016-09-29 03:01:55 +0200 by jinjee

Can I read rssi info on nRF2460?

We need to know the RSSI info when devices are on going pairing sequence...

23
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1
answer
Last activity 2016-09-29 02:22:45 +0200 by RK flag of Singapore

nRF52832: UART buffers, PHY interface questions

Hi,

Context

The chip will be a slave of a powerful CPU which is responsible for many coordinating tasks. The chip will connect the CPU via UART. I am interested in BLE.

It is important to minimise the interrupt rate ... (more)

33
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answers
Last activity 2016-09-28 23:20:13 +0200 by Stefan Birnir Sverrisson flag of Iceland

COMP Shortcuts

I have difficulties understanding the COMP APIs, this function below starts after initializing the COMP the peripheral.

nrf_drv_comp_start(NRF_DRV_COMP_EVT_EN_CROSS_MASK,NRF_DRV_COMP_SHORT_STOP_AFTER_CROSS_EVT);

It expects a secoend argument which set the the shortcut register.

It is no where mentioned in the documentation that ... (more)

35
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votes
1
answer
Last activity 2016-09-28 21:44:57 +0200 by Sebastian Bøe

Erase only N first kB of flash memory before reprogramming.

Hello,

Is it possible to erase only first N kB of internal flash memory before reprogramming nRF51 with JLink?

Lets say that I just want to erase first 64 kB of flash, how can I achieve that with Segger and JLinkExe?

29
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answers
Last activity 2016-09-28 21:14:26 +0200 by John M

anyone is developing a long-range bluetooth pendant or wearable using nRF51822?

We love the radio range of the Nordic bluetooth chips. I am looking to see if anyone is developing a long-range bluetooth pendant or wearable? if so, I interested in perhaps adding it to the safety solution we offer. Happy ... (more)

7
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answers
Last activity 2016-09-28 19:06:14 +0200 by chtsai

fail flash bootloader by ST-link

Here My device (chip nrf51822_xxAA) exist softdevice 8.0.3 and BLE uart application work fine which flash by the ST-link in Keil MDK(5.20). Now I try to add bootloader to my device from the example project of ... (more)

35
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no
votes
1
answer
Last activity 2016-09-28 18:49:10 +0200 by Stefan Birnir Sverrisson flag of Iceland

Specifications about Low Power PWM with NRF52 SDK12

Hi,

We search some technical informations about Low Power mode PWM. What is the Max Frequency ? What is the current consommation ? Someone knows these informations or a technical document with the answer ?

Sincerely yours

34
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Last activity 2016-09-28 17:56:49 +0200 by Stagmation

nrf905: When using the auto-retransmit function, does the nrf905 also check the CD (carrier detect line) before sending?

The nrf905 has a CD (carrier detect) pin that is pulled high if the nrf905 detects another device communicating on the same channel. This can be used on the MCU for collision avoidance. But what happens if you use the ... (more)

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answers
Last activity 2016-09-28 17:50:56 +0200 by VoidGreen

Nrf 51 BLE HID with Feature and Output reports example?

Hi,

Is there an example available for Nrf51822 BLE HID (nrf5 SDK v11) with Feature and Output reports? I've added an output HID report to HID mouse example from SDK and Windows recognize it. But when I try to ... (more)

8
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answers
Last activity 2016-09-28 17:34:17 +0200 by fungame

change peer_manager to device_manager for ble_app_proximity

I can't build ble_app_proximity_pca10040 example due to uv5 core size limit. One user suggested that I port the old device_manager to SDK 12 proximity example to reduce core size.

I replaced peer_manager.h with device_manager.h and corresponding function ... (more)

23
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answers
Last activity 2016-09-28 17:30:48 +0200 by CurtisHx

Future nRF5x chip with better RF power output control steps?

Are there plans to create a nRF5x micro that has finer control over the RF power output? I'm currently using an nRF52, and the 4dBm steps are pushing the limits of our intended application. Ideally, I would love to ... (more)

17
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answers
Last activity 2016-09-28 17:29:43 +0200 by Philipp Mahr

CE R&TTE testing of different packet types with nRF52

Hi All,

we currently move our custom design to CE testing and already did some successful EMC pretesting. However, our testing house asked us to prepare a firmware for fixed frequency testing with different packet types (DH1,DH3,DH5).

Looking ... (more)

28
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answers
Last activity 2016-09-28 16:58:34 +0200 by Ole Bauck flag of Norway

Nrf52 with softdevice doesn't exit system off

Hi

I am trying to put nrf52 device to system off mode, and wake up by button press.

If I do not enable the softdevice everything works fine, and button press wakes up the device. But if I enable the ... (more)

45
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no
votes
1
answer
Last activity 2016-09-28 16:52:45 +0200 by Eirik Midttun

how to build a nrf52832 mbed demo in keil ide?

i am confused how to build a nrf52832 demo that use mbed os and other mbed things. and i tried link text download the demo from github, but do not know how to put in it in a keil project ... (more)

34
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votes
2
answers
Last activity 2016-09-28 16:34:28 +0200 by Jørgen Holmefjord flag of Norway

Connection and Advertising in Beacon [closed]

Hi All,

I have enabled the UART service in my beacon application.I Configured write access and write permission to characteristic UUID. I got connected to the device and after disconnecting the beacon is not coming back to advertising mode ... (more)

17
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no
votes
1
answer
Last activity 2016-09-28 16:33:22 +0200 by Ole Bauck flag of Norway

understanding app_timer functionality

I am using app_timer to measure the time taken to execute a function. I am using ble_app_template code. As mentioned in the documentation, app_timer needs to initialize the LFCLK. It doesn't need to initialize a LFCLK if softdevice is ... (more)

21
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votes
1
answer
Last activity 2016-09-28 16:23:42 +0200 by Sigurd flag of Norway

NRF52 + MPU 6050 + I2C

Hi!

I am new to the embedded world and am trying to interface a NRF52 DK with a MPU 6050 accelerator/gyroscope. Right now, I have been able to interface the MPU 6050 with an arduino. Now, I want to ... (more)

17
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no
answers
Last activity 2016-09-28 15:40:11 +0200 by mukesh

Combining two applications

I want to combine two applications, both of them having two services. One application resides at 0x16000 and other one resides at 0x249f0. I am using softdevice 7.3 and sdk 6. What I wanted to do is that, when ... (more)

44
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no
votes
1
answer
Last activity 2016-09-28 15:31:21 +0200 by Stefan Birnir Sverrisson flag of Iceland

Flash Storage problem nRF52

I'm having no success getting the FDS (Flash storage) to work on my nRF52 PCA10040 board with SD130 2.0.0 and SDK11. I am using the Nordic example on Github here: https://github.com/hubuhubu/nRF52-fds...

My system ... (more)

20
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answers
Last activity 2016-09-28 15:10:49 +0200 by patrick

PCA10040 UART problem

Hi,

I'm using a PCA10040 board with the UART example provided with the v12 SDK, and the data seems to get corrupted somewhere along the way between my Ubuntu machine and the nrf52.

When I do:

 pr@pr:~/nRF5 ...
(more)

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