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28,668 questions

36
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Last activity 2015-05-05 12:26:19 +0100 by asdasdasdasdasd

When programed bootloader,my own 51822 module can't work without Development Board [closed]

When not programed bootloader,my own 51822 module can work without Development Board,i supply the power through the button cell to my module. But when programed bootloader,my 51822 module can't work,it works only when it is ... (more)

709
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no
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no
answers
Last activity 2015-05-05 12:17:11 +0100 by Anthony

Cannot connect to nRF51 device by nRF Toolbox (HTS app)

Should be noted that i'm using nRF51822 breakout board and i have a lot of problems with its programming. And i'd just begun to write own topic about my problems with connection and programming when it started to ... (more)

129
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no
votes
1
answer
Last activity 2015-05-05 11:52:27 +0100 by Aryan flag of Norway

Does experimental_ble_app_uart not work without Flow Control?

I am trying to make the experimental_ble_app_uart for s110 work using SDK 7.2. It works fine without any modifications, but when i turn off Hardware Flow Control in the UART_init() i am not able to send anything. Does anyone ... (more)

552
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no
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no
answers
Last activity 2015-05-05 11:15:09 +0100 by Clem Taylor

breakpoints stopped working with nrf51-dk, gdb and JLinkGDBServer

At some point in the past I had nrf51+gdb+breakpoints working just fine. I even have a bunch of __BKPT() calls in my various error handlers to trap into the debugger.

At some point in the past I noticed ... (more)

648
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6
votes
2
answers
Last activity 2015-05-05 11:10:51 +0100 by ImQ009

Timers not working when using C++? [closed]

So. After countless hours of messing around, reading SDK, examples and stuff I'm begginning to feel kind of frustrated. I want a microsecond timer. For that I tried a number of different approaches: app_timer, timer driver API and accessing ... (more)

714
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1
vote
2
answers
Last activity 2015-05-05 11:03:08 +0100 by endnode

Sending data over ble module

hi guys, im developing a program to interface accelerometer MMA8452 with nrf51822.so if accelerometer is in peripheral device,how do i send the x,y,z co-ordinates from peripheral to my central device??

36
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no
votes
1
answer
Last activity 2015-05-05 10:33:29 +0100 by Aryan flag of Norway

spi_master_evt.evt_type

Hello, I am new to Nordic NRF51dk and I'm working on the SPICommunication_module c.

For the switch case statement, I am trying to understand what the spi_master_evt.evt_type is, which is located inside the switch statement argument. Can anyone ... (more)

170
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answers
Last activity 2015-05-05 10:08:24 +0100 by Aryan flag of Norway

nRF51822 pairing problem [closed]

Hi every one,

How can i pair the nRF51822 with another bluetooth module such as CC2541 or pc normal bluetooth.

Thanks for helping me

96
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no
votes
1
answer
Last activity 2015-05-05 09:45:16 +0100 by Aryan flag of Norway

Why I can't program my nRF51 DK through Keil "Download" button? [closed]

Now, I'm using "nRF51\peripheral\temperature" example to test something for my nRF51 DK board. I have upgraded sofeDevice s110 v8.0.0 in DK and I can use Keil "Download" button to flash "ble_app_uart" application into it. But ... (more)

129
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no
votes
1
answer
Last activity 2015-05-05 09:39:14 +0100 by Aryan flag of Norway

GPIO not working with SD

Hello,

I have configured a 1 ms timer (Timer 2) interrupt. I am just updating some static variables for reference in the 1 ms interrupt. Everything seems to be working fine here (SD enabled). However I tried to toggle one ... (more)

738
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no
votes
2
answers
Last activity 2015-05-05 09:07:52 +0100 by Martin Børs-Lind flag of Norway

original nRF51822 beacon firmware backup

Gentlemen: Do you have posted a copy of the original firmware that comes installed on the nRF51822 beacon? I have been experimenting writing my own app on that beacon, and so replaced that firmware with my own. But now, I ... (more)

778
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2
votes
1
answer
Last activity 2015-05-05 06:03:00 +0100 by RK flag of Singapore

Setting advertising interval in nRF51822 Beacon Kit

Hi,

I would like to change the the advertising interval of the beacon kit in the sample ble_app_beacon app; however, I could not figure out where this parameter is. I see the APP_CONFIG_ADV_INTERVAL variable in main.c, but apparently this ... (more)

225
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2
votes
1
answer
Last activity 2015-05-05 05:55:31 +0100 by RK flag of Singapore

BSP driven buttons don't work with a bootloader [closed]

Situation

  1. I have an app, that use a BSP to detect pressing of the buttons. It works.

  2. I have a bootloader. It also works.

Problem

When I flash bootloader AND app simultaneously, BSP cannot handle button pressing. No errors during ... (more)

181
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no
votes
1
answer
Last activity 2015-05-05 03:58:38 +0100 by RK flag of Singapore

nrf51 dongle programming [closed]

Hi,

I want to get this dongle to 'see' the data being transmitted to and from the nrf51 dk. I saw a note hereadafruit saying

The sniffer firmware cannot be used with the Nordic DFU bootloader firmware, which means ...

(more)

105
views
no
votes
2
answers
Last activity 2015-05-05 00:38:23 +0100 by Gustav

Enhanced Shockburst mode with out pre-loaded reply

I am using the nRF24le1 in Enhanced Shockburst mode.

The datasheet describes how it is possible to upload acknowledge packets, W_ACK_PAYLOAD, to the TX FIFO. And then the PRX will send the acknowledge as soon as it receives a packet ... (more)

110
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no
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no
answers
Last activity 2015-05-04 23:51:13 +0100 by Meh05

multilink central update problem [closed]

Hi, I want to use ble_app_multilink_central example for my own application. Here are my problems:

  1. Setting MIN and MAX CONN_INTERVAL to more-less 20ms or lower (both on peripheral and central) causes that central goes of when peripherial is trying to ...
(more)

517
views
no
votes
1
answer
Last activity 2015-05-04 22:05:02 +0100 by Nikolaj flag of Denmark

Copying the PCA10028 antenna design

Hi,

Is it possible for me to completely copy the antenna design from PCA10028 unto my custom board? I don't need a very long range, but I need to make a design fairly quickly.

My problem is that I ... (more)

628
views
1
vote
no
answers
Last activity 2015-05-04 20:13:10 +0100 by Vivian

nRF51822 sniffer Decryption incorrectly

We've been using the nRF51822 sniffer to listen to packets. One of our developers used to be able to use it decrypting packets without a problem (He uses 32-bit system, firmware version special built provided by you guys - 096_alpha_739_766fw ... (more)

182
views
no
votes
2
answers
Last activity 2015-05-04 17:25:38 +0100 by ppatierno

Why nRF51822 DK running HTM APP can't be paired with any windows 8.1 NB?

We tried to pair with and connect to nRF51822 DK running HTM app with SONY VAIO fit15e NB and always fail as we did the following steps. We also tried some devices like ASUS VIVO Smart Tablet and Window phone ... (more)

299
views
no
votes
1
answer
Last activity 2015-05-04 16:59:48 +0100 by ppatierno

s110 v8.0.0 ble_app_uart pairing Issue

Hello.

I use SDK 8.0.0 and PCA10028 board. I try connect board to the Windows 8.1 PC ( i have Tablet PC and Desktop PC with BLE dongle). For connect board to Windows i must perform pairing procedure ... (more)

393
views
1
vote
1
answer
Last activity 2015-05-04 16:29:21 +0100 by Torbjørn Øvrebekk

nRF24L01+ as TX and nRF51822 as RX

I have a nRF24L01+ connecting to an Arduino board using the RF24 library code. It is a print of the registers:

http://i.imgur.com/Y3krORD.png

On the nRF51822 I have the following code:

    int main()
{
    // Initialize ESB
    (void)nrf_esb_init(NRF_ESB_MODE_PRX);

        nrf_esb_set_base_address_length(NRF_ESB_BASE_ADDRESS_LENGTH_4B);
        nrf_esb_set_datarate(NRF_ESB_DATARATE_250_KBPS ...
(more)

213
views
no
votes
2
answers
Last activity 2015-05-04 16:15:19 +0100 by Torbjørn Øvrebekk

Gazell Availabel Channels

What are the allowed channel numbers for gazell?

In the gazell user manual it states, a possible 80 channels. While the nrf_gzll_set_channel_table () API reference says channels can be "0 <= channel <= 125, where the actual centre frequency is (2400 + channel)*".

But ... (more)

125
views
no
votes
1
answer
Last activity 2015-05-04 16:04:25 +0100 by Martin Børs-Lind flag of Norway

How can I set PCA10001 work with 32MHz?

For PCA10001 have 16MHz crystal, and I use the NOP to test the cycle. And found the device work in 16MHz. How to set this board as 32MHz?

This is my current setting in S120: SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false);

Thanks!

55
views
no
votes
1
answer
Last activity 2015-05-04 15:54:13 +0100 by Hung Bui

DRGN-4626, DRGN-4743, DRN-4744 [closed]

What is the meaning of these abbreviations?

87
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no
votes
1
answer
Last activity 2015-05-04 15:53:52 +0100 by Hung Bui

what is DRGN

HI,

I went through the forums and while searching for help, I came across the word DRGN.

Can anybody elaborate the word.

Thanks,

2k
views
no
votes
1
answer
Last activity 2015-05-04 15:49:38 +0100 by Martin Børs-Lind flag of Norway

Bluetooth Developer Studio (Beta) Plugin? [closed]

Based on the announcement for upcoming training (https://www.nordicsemi.com/eng/Events...) it sounds like Nordic will support the Bluetooth SIG's Bluetooth Developer Studio (http://www.bluetooth.com/SiteCollecti...). When/where will a plugin be available?

800
views
no
votes
2
answers
Last activity 2015-05-04 15:46:14 +0200 by Stefan Birnir Sverrisson flag of Iceland

Android 5.01 (Nexus 4) multiple packets per connection interval

Dear community,

I would like to know how to send as much data as possilbe from a Nexus 4 to an NRF51822 based device. For that I think I need to send multiple packets per connection interval.

What I did ... (more)

308
views
no
votes
1
answer
Last activity 2015-05-04 15:36:53 +0100 by Kristin flag of Norway

NRF51422 differential antenna port impedance?

I am trying to use a differential antenna with the NRF51422 and I do not want to misunderstand the datasheet. It says that the optimum differential impedance at 2.4 GHz seen into the matching network from pin ANT1 and ... (more)

420
views
no
votes
1
answer
Last activity 2015-05-04 15:29:03 +0100 by Hung Bui

UART bootloader

Hi, Is there a UART bootloader built in to the factory firmaware similar to others like NXP LPC series where a specific pin is held low at reset. If so what pins are used? Thanks

48
views
no
votes
1
answer
Last activity 2015-05-04 15:17:59 +0100 by Petter Myhre flag of Norway

Two app on a mobile phone connectted with a device [closed]

Hi, Nordic Engineers:

Pls give your hand, new question: Could i run two app on one mobile-phone that connceted with only one device? also, they can operate the device by their turn.

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