RSS
Sort by » date activity answers views ▼ votes

6,205 questions

Tagged
  • x
50k
views
28
votes
1
answer
Last activity 2014-09-18 13:04:55 +0200 by Petter Myhre flag of Norway

Why do I get “Error: Flash download failed – Cortex-M0” when downloading a project from Keil? [closed]

When I try to download code to my nRF51822 from Keil, I get this error: “Error: Flash download failed – Cortex-M0”

What can I do about it?

50k
views
53
votes
2
answers
Last activity 2015-07-01 03:17:15 +0200 by Pratyush Dave

What is connection parameters?

What are the connection parameters for a Bluetooth low energy link, and how do they affect performance?

30k
views
3
votes
2
answers
Last activity 2017-06-28 13:54:00 +0200 by Stian flag of Norway

BLE SIG Certification, Reference design to be used to obtain EPL

Hi, does anyone know if there is a document in which is explained, by Nordic, how to obtain a bluetooth certification using nRF51822 and S110 Stack ?

I know if a reference design is strictly followed the customer do not need ... (more)

19k
views
47
votes
2
answers
Last activity 2014-10-16 10:33:31 +0200 by Stefan Birnir Sverrisson flag of Iceland

What low-frequency clock sources can I use?

When initializing the S110 softdevice, I can choose between the different clock sources as defined by the nrf_clock_lfclksrc_t enum:

/**@brief Possible lfclk oscillator sources. */
enum NRF_CLOCK_LFCLKSRCS
{
  NRF_CLOCK_LFCLKSRC_SYNTH_250_PPM,                       /**< LFCLK Synthesized from HFCLK.                    */
  NRF_CLOCK_LFCLKSRC_XTAL_500_PPM,                        /**< LFCLK crystal oscillator 500 PPM accuracy.       */
  NRF_CLOCK_LFCLKSRC_XTAL_250_PPM,                        /**< LFCLK ...
(more)

26k
views
32
votes
11
answers
Last activity 2015-11-07 14:17:19 +0200 by Tony

License for KEIL MDK is EXPENSIVE. Any way around??

I am starting my development work with Nordic Semiconductor nRF51822 Device and already purchased the Development kit. What i wanted to ask is do i need to purchase KEIL MDK 500 License to write my code/application? Because the Low ... (more)

16k
views
36
votes
6
answers
Last activity 2015-01-02 08:35:08 +0200 by Stefan Birnir Sverrisson flag of Iceland

What is the power and clock model of peripheral in NRF51? [closed]

Hello,

I was puzzled by RM.

I notice POWER control register in peripheral(UART,SPI,TWI) module.

Please answer following questions about the relation between system power and the peripheral power register value.

  1. Will UART be powered when system power ...
(more)

17k
views
19
votes
4
answers
Last activity 2016-02-11 14:53:59 +0200 by Stefan Birnir Sverrisson flag of Iceland

LDO vs DCDC (nRF51822)

I am not quite certain what the advantages/disadvantages are of using LDV vs DCDC if you are using an external regulator. In my case i use a LiPo battery outputting ~4.2V so i need to drop the voltage ... (more)

16k
views
26
votes
2
answers
Last activity 2016-05-20 16:28:53 +0200 by melchior

What does CCCD mean?

Dear Nordic Developer Zone,

I have a silly question. After searching in the Nordic and Bluetooth documentation, I didn't find what CCCD and SCCD mean. Theses metadata are parts of the characteristics.

Can you explain me what these acronyms ... (more)

16k
views
8
votes
4
answers
Last activity 2016-08-30 09:12:57 +0200 by Martin Børs-Lind flag of Norway

Hardware TWI/I2C Example

The latest TWI example I can find is from 4 SDK revisions ago and uses old libraries. Is there a sample using the nrf_drv_twi library that is recommended for current development?

15k
views
29
votes
6
answers
Last activity 2013-06-27 18:37:40 +0200 by Alex Lynchosky

How do I create my own service on the BLE stack? [closed]

I've sifted through the examples given to me, and none of them seem to explain how to create your own service and add it to the stack. All of the services that are registered in the ble examples (nRF51 ... (more)

16k
views
no
votes
2
answers
Last activity 2013-10-26 15:50:40 +0200 by cocoa

S110 version 5.2 splitting using gcc objcopy. Programming failed at 0x10001010 [closed]

Hi 'Nordic' guys,

splitting the original S110 hex file provided by Nordic , version 5.2, there is an error extracting uicr section.

Now is only 20 bytes and not 32 as old version.

Jlink reports an error occurring at address ... (more)

14k
views
3
votes
1
answer
Last activity 2017-05-08 10:57:41 +0100 by Stian flag of Norway

question related to uicr [closed]

Hi, i am newbie to nrf51822 and want to know details of following stuffs:

1)what is use of uicr?

2)if i place some value in uicr and then change the image,then is there will be change in ... (more)

13k
views
7
votes
6
answers
Last activity 2017-06-11 00:16:25 +0200 by Gabor Paller

Why does my nRF51822 consume > 1 mA in sleep?

No matter what sleep mode I put my nRF51822 in (system on, idle, system-off), it seems that the base current is above 1 mA. Is this how it's supposed to be?

14k
views
9
votes
2
answers
Last activity 2013-10-02 08:25:46 +0200 by Guest

What's the maximum size for an advertisement package?

How large can an advertising package in BLE be?

13k
views
16
votes
2
answers
Last activity 2016-11-01 15:16:31 +0200 by Thanh Duong

How can i write 10kB of data to internal flash?

Hi,

I use nRF51822 with 256k flash and external sensor, and i want to write the data i receive from it via SPI to internal flash?

After the data received i want to send it to iOS application with s110 ... (more)

13k
views
1
vote
1
answer
Last activity 2013-09-02 10:04:38 +0100 by Igor Ishchenko

Analog input pins on motherboard

Hello!

I have a very simple setup with Arduino board (see attachment)

I wish to move to the nRF51822. I have the development kit and the nRF Go motherboard.

As I understood from the docs I should connect to P5 ... (more)

16k
views
6
votes
4
answers
Last activity 2015-04-20 14:13:21 +0200 by Martin Børs-Lind flag of Norway

Compiling github projects

Hi,

After downloading any of the projects from nordic github, how does one compile the project successfully? Where should i extract the files to and what paths should i include? I have not been able to get a single project ... (more)

13k
views
14
votes
12
answers
Last activity 2014-08-19 07:59:29 +0200 by bforutan

Is there an example code for using PWM on the nRF51822 with a SoftDevice? [closed]

I'm looking to add PWM functionality to my design to drive an LED. Examples exist for other devices, and those don't use the SoftDevice. Is there an example or some reference design for making the PWM module work ... (more)

12k
views
38
votes
9
answers
Last activity 2015-04-20 08:52:35 +0200 by Joe Merten

nRF51822 over the air bootloader with gcc

For my current project, I need to compile the »over the air bootloader« with gcc (because our buildserver runs on linux, developers using Mac … no Windows and no Keil so far).

But unfortunaly, the bootloader example from the sdk (5 ... (more)

15k
views
9
votes
6
answers
Last activity 2016-09-23 09:00:45 +0200 by duckduck

PINCODE

Hi everyone,

Somebody knows if its possible and how to configure a Pin code to establish the connection between the nRF51 peripheral and a phone as a central? Something like 4 or 5 digit pass code.

Thanks!

10k
views
4
votes
2
answers
Last activity 2015-11-19 12:03:30 +0100 by Stefan Birnir Sverrisson flag of Iceland

How to change the data length of BLE notification [closed]

The maximum data length of a characteristic is 9, and I use the follow function to send the notification to a client

uint32_t dxs_send(dr_ble_dxs_t * p_dxs, uint8_t * p_data, uint16_t length)
{
    uint32_t ret_code;

    ble_gatts_hvx_params_t hvx_params;

    if (p_dxs == NULL)
    {
            return NRF_ERROR_NULL;
    }

    if ...
(more)

10k
views
23
votes
5
answers
Last activity 2014-09-11 12:08:07 +0200 by Tim

How do you put the nrf51822 chip to sleep? [closed]

I am wondering how you put the nrf51822 chip to sleep. I've determined that the way to do this with the soft device is sd_app_event_wait() in the while loop. What about non-softdevice?

I am wanting to have it sleep ... (more)

11k
views
20
votes
3
answers
Last activity 2016-05-06 18:57:30 +0200 by Stefan Birnir Sverrisson flag of Iceland

Combining SD, DFU and Application .hex and Programming

Hi guys,

First issue: is that the mergehex.exe fails everytime when trying to Write the merged file. The Error is ERROR: An error occured while writing the file. this has occurred on every attempted combination of SD, DFU and ... (more)

14k
views
10
votes
4
answers
Last activity 2014-08-14 04:19:30 +0200 by michurin

User/custom data in advertising packets?

The BTLE specification does allow user/custom data to be added to the advertising packets. Which field in the advertising data structure is the right place for adding such data? I'd like to avoid hacks, so prefer to do ... (more)

9k
views
39
votes
6
answers
Last activity 2016-09-14 18:35:45 +0200 by Stefan Birnir Sverrisson flag of Iceland

How to measure Lithium battery voltage [closed]

How to measure Lithium battery voltage with the nRF51 ADC

9k
views
5
votes
3
answers
Last activity 2016-01-05 10:50:47 +0200 by David Edwin

BLE settings for max data transfer speed to iOS

Hello

I'm trying to send a dataset from the nRF51-DK over BLE to an iOS device. The total data to be sent is around 500 kB. What is the best method for transmitting this data quickly and what are ... (more)

9k
views
13
votes
4
answers
Last activity 2016-07-20 17:57:00 +0200 by Christopher

Are you looking for a book on BLE? A new one was just published

Hi all,

I'm Carles from Nordic and I'm happy to announce that O'Reilly has recently published a new book "Getting Started with Bluetooth Low Energy" of which I am a co-author.

For those of you that are ... (more)

9k
views
15
votes
7
answers
Last activity 2016-08-02 22:22:47 +0200 by Kristin flag of Norway

How are you going about Production Programming for nRF51 parts? [closed]

Howdy,

We're gearing up to program about 4,000 nRF51822s. They'll get the BLE version of DFU plus a stable version of our own code. For future production runs, we'll likely have our partner in Japan program ... (more)

8k
views
12
votes
18
answers
Last activity 2014-04-02 09:21:41 +0200 by bayi255

nRF UART App [closed]

where is "nRF UART App" nRF51822 code ?

8k
views
10
votes
6
answers
Last activity 2014-07-02 10:14:54 +0100 by Pål Håland

nRF51822 Peripheral with Passkey [closed]

Hi, like many others, I'm confused with Peripheral Passkey Connection.

I'm playing with the ble_app_hrs, in order to be able to setup a Connection Passkey (for the moment I would like to have a static hard-coded passkey). The ... (more)

Statistics

  • Total users: 26364
  • Latest user: Roseanna Steffen
  • Resolved questions: 11565
  • Unanswered questions: 4031
  • Total questions: 28761