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27,773 questions

1k
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1
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3
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Last activity 2014-09-24 13:21:51 +0200 by Stefan Birnir Sverrisson flag of Iceland

PWM analyzer / Pulse counter [closed]

Is it possible to count pulses with the 51822 from an external device in the range of 250-15.000 pulses pr. second, while the CPU is powered down (softdevice sleep)?

I've had a look at the pwm_analyzer sample, which ... (more)

1k
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7
votes
4
answers
Last activity 2014-09-24 11:55:48 +0200 by matija

nRF51822 and iOS8 [closed]

Hi, we've been using nRF51822 for developing application and iOS 7.x detect then just fine. Since I upgraded to iOS 8. Beacons are 'invisible' to our application. I was wondering is somebody else is experiencing the same problem ... (more)

958
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3
votes
1
answer
Last activity 2014-09-24 11:26:27 +0100 by Asbjørn flag of Norway

Protect bootloader from overwrite/erase [closed]

I am using Nordics sample bootloader and I really want to make sure that given a freak accident in sending it the firmware or in the firmware code itself that the bootloader is never erased or overwritten. In its current ... (more)

235
views
4
votes
2
answers
Last activity 2014-09-24 11:01:06 +0100 by Nicole

S110 serialization based on Linux [closed]

Please,

We want to develop our BLE related application on PC and we find that "GAP/GATT driver for windows" is a good way to achieve that. While our system is based on Linux (Ubuntu 12.04) and currently the ... (more)

35
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1
vote
1
answer
Last activity 2014-09-24 09:19:19 +0100 by Håkon Alseth

Is COB available on 51422?

Just exploring the lowest cost. I would think it is pretty hard to control the process on the RF side, but worth to ask :-)

281
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3
votes
1
answer
Last activity 2014-09-24 09:11:30 +0100 by Håkon Alseth

SPI NRF_ERROR_NOT_SUPPORTED [closed]

I want to use the pca10001 to communicate as a master to an accelerometer, but when i use the function spi_master_open i get a NRF_ERROR_NOT_SUPPORTED error. I get no clock on sclk when I measure with an oscilloscope.

I have ... (more)

503
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3
votes
1
answer
Last activity 2014-09-24 03:16:25 +0100 by Nguyen Hoan Hoang flag of Canada

How can I initialize System and PnP ID? [closed]

Hi,

I'd like to read PnP and the system ID from Device Information Service. How can I initialize system and PnP ID? Are there any examples how to do this for nrf51822. For example, for the manufacturer name, the ... (more)

99
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1
vote
1
answer
Last activity 2014-09-24 02:56:41 +0100 by Nguyen Hoan Hoang flag of Canada

Anyone using Imagecraft compiler for the nRF51822?

I just downloaded their iccv8cortex trial version and it includes the 51822 as a target. My 5 minute test drive not withstanding, it looks like this might be a good option for those of us who don't have the ... (more)

647
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2
votes
2
answers
Last activity 2014-09-24 00:33:43 +0200 by tim

NRF_ERROR_INTERNAL err code 3003 [closed]

Hi,

I'm trying to connect to BLE and send data on UART. I'm using nrf51422 with softdevice s310 and SDK v5.2.0.

The following code gives me error 3003 which I figured out it is NRF_ERROR_INTERNAL. Can ... (more)

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1
vote
3
answers
Last activity 2014-09-23 21:58:20 +0100 by scytulip

How accurate is die temperature using sd_temp_get()

Hi,

I am measuring die temperature of the nRF51822 using sd_temp_get() at the timeout handler of the RTC1 timer every 2 seconds.

I am using the battery service for a quick test.

After dividing the result by 4 I am ... (more)

393
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no
votes
1
answer
Last activity 2014-09-23 21:41:53 +0100 by John DeWitt flag of United States

disconnect reasion 0x8 [closed]

what is this mean?

How can I find disconnect reasion mean?

532
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1
vote
1
answer
Last activity 2014-09-23 17:49:26 +0200 by Petter Myhre flag of Norway

SPI Pin assignment problem [closed]

Hello,

I am trying to use SPI on a mbed nRF51822 and am following the documentation suggestion. We've deleted all code except the minimum to try and track down the problem.

#include "mbed.h"
int main() {
    SPI device(p5 ...
(more)

401
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no
votes
2
answers
Last activity 2014-09-23 16:43:19 +0100 by Vidar Berg

Question about gcc+eclipse+s130+osx [closed]

Hi,

i want to build an applicaiton with gcc and eclipse setup and S130. I use OSX. if i don't use the softdevice and run it with the blank linkerscript my blinky code works fine. i Use "make all ... (more)

867
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2
votes
1
answer
Last activity 2014-09-23 16:37:00 +0100 by Stefan Birnir Sverrisson flag of Iceland

how to handle NRF_ERROR_INVALID_STATE of sd_ble_gap_scan_start?

Hi all,

I develop a central application, which manages multiple peripheral connections. The application often has to stop and start scanning again. In rare cases the function sd_ble_gap_scan_start() returns with “NRF_ERROR_INVALID_STATE” so the following APP_ERROR_CHECK() causes a software reset. In ... (more)

1k
views
7
votes
2
answers
Last activity 2014-09-23 16:18:37 +0100 by jcdergan

nrF51822 gazelle enhanced shockburst [closed]

What is the difference between Gazelle and Enhanced Shockburst on the nRF51822? Is one faster or more energy efficient?

Thanks, Tom

192
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1
vote
2
answers
Last activity 2014-09-23 15:49:47 +0100 by Ignacio Lopez-Negrete flag of Spain

s110_nrf51822_7.0.0 not suitable for nRF51822 QFABB0 (128kb version) [closed]

I would like someone from Nordic to confirm that the new softdevice release s110_nrf51822_7.0.0 is not suitable for the 128kb versions of the chip (in my case nRF51822 QFABB0) because of the size of the stack.

The size ... (more)

138
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1
vote
1
answer
Last activity 2014-09-23 15:43:47 +0100 by Stefan Birnir Sverrisson flag of Iceland

General Info: Usage of SoftDevice [closed]

Hi! How is the functionality choosen, the nRF51822 has to offer? Is the SoftDevice (e.g. SD120) an API in C where a specific functionality (e.g. central role listening to iBeacons) is chosen via specific usage of API and ... (more)

141
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no
votes
2
answers
Last activity 2014-09-23 15:18:16 +0100 by Petter Myhre flag of Norway

Interesting sniffer behavior with a custom service

I was playing around with examples and decided to implement a custom service that sends the RSSI as a single-byte characteristic value. Here's the init function:

static uint32_t rssi_char_add(ble_rssis_t * p_rssis, const ble_rssis_init_t * p_rssis_init)
{
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t ...
(more)

288
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no
votes
1
answer
Last activity 2014-09-23 13:58:15 +0100 by Behnam

How to make proximity template works on Blend Micro?

Hi I want to run the ble_proximity template on micro blend (Readbear lab). But I can't make it to work. I have uploaded the code to the board and using the nRF Proximity app on iphone. But it cannot ... (more)

485
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1
vote
1
answer
Last activity 2014-09-23 13:40:55 +0100 by Petter Myhre flag of Norway

Write byte

Hi,

How can i write one byte to specific memory address with sd_flash_write()

Thanks

91
views
1
vote
1
answer
Last activity 2014-09-23 13:34:35 +0100 by Aashish Patel

Connection issues nrf51822 PCA10001 with android app [closed]

Hi All,

We have a PCA10001 running a ble_app_hid_mouse (modified according to our use case) which receives data from PC UART.

We are trying to connect to this device using custom android ble app and MCP app but sometimes it ... (more)

205
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4
votes
1
answer
Last activity 2014-09-23 12:57:58 +0100 by Hung Bui

How to not send 0x0A at the end of data in nrf Uart v2.0 app [closed]

Hi, I am using nrf51822(128k), SD 6.0, SDK 5.2.

I found that nrf uart v2.0 app will add a "0x0A" at the end of data that I want to send. How can I remove this?

Thank you

700
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1
vote
2
answers
Last activity 2014-09-23 12:33:41 +0100 by Stefan Birnir Sverrisson flag of Iceland

S120 & nRF51822: Stopping scan kills connections, sometimes

What I've been observing here is a curious issue under some very specific circumstances. First off, I am using a Xuntong Tech PTR9018 module (this is QFAAC0), the S120 1.0.0 softdevice, and SDK 6.0.0 (though ... (more)

129
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1
vote
1
answer
Last activity 2014-09-23 12:07:49 +0100 by Håkon Alseth

ESD grade of nordic [closed]

please help to confirm the ESD grade of nordic SOC. i can't find all the parameters(HBM, CDM,MM) in the datasheet, only HBM in 24LE1, and only HBM&CDM in nRF51822.

7k
views
8
votes
5
answers
Last activity 2014-09-23 11:07:20 +0200 by Petter Myhre flag of Norway

High Sample Rate with ADC and SoftDevice [closed]

I am trying to sample the ADC every 2ms. I notice lots of slowness with BLE advertising and typically can't connect to device over BLE when sampling. I am using PPI, configuring, and starting before the softdevice is enabled ... (more)

1k
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no
votes
1
answer
Last activity 2014-09-23 11:05:26 +0100 by Håkon Alseth

Programming the nrf51822 with Keil ULINK-ME [closed]

Hello,

I would like to know about the possibility of programming the nrf51822 with a Keil ULINK-ME Debug Adapter (or, if necessary, Keil ULINKpro) instead of the recommended Segger J-LINK. In particular, we are having trouble configuring the UICR registers ... (more)

175
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1
vote
2
answers
Last activity 2014-09-23 09:00:45 +0100 by Raffaele Trani

error installation driver [closed]

after installing nFR51 sdk , i got the error of driver installation failed.

image description

305
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1
vote
1
answer
Last activity 2014-09-23 08:42:38 +0100 by Stefan Birnir Sverrisson flag of Iceland

S110 EK demos not working after upgrades

I upgraded to: Keil V5.11.1.0 J-Link 4.90 nRFgo Studio 1.17 S110_nrf51822_6.0.0

The blinky demo works fine, but s110 demos like the ble_app_hrs won't advertise. LED 0 doesn't blink, and MCP 3 ... (more)

524
views
no
votes
1
answer
Last activity 2014-09-23 07:10:29 +0100 by Nikita

app_timer with scheduler event context

After:

APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);

and:

app_timer_create(&m_sysctl_timer_id, APP_TIMER_MODE_REPEATED, sysctl_timer_event);
app_timer_start(m_sysctl_timer_id, ticks, NULL);

Will sysctl_timer_event() execute under control of app_sched_execute() at MAIN user context level?

221
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no
votes
2
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Last activity 2014-09-23 01:49:46 +0100 by scytulip

Using pstroage with different data sizes.

In our application, we need to save a group of data objects, how many data objects in a group is dynamic. also each data object has different sizes, a few bytes up to 100+ bytes.

The size of data is ... (more)

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  • Resolved questions: 11252
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  • Total questions: 27773