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# 6,197 questions

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947
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1
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1

## I want to pause the radio in a short time，because i want the uart receive data without error。

Hi，

I want to use the BLE SoftDevice without any flow control and the baud rate higher than 9600. In this question say this could lead to lost bytes from the UART peer to the nRF51822.

but ,can i pause ... (more)

321
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no
1

## can't get nothing to work, at a loss here. Errors everywhere, versions not correct

Hello developers,

I've got an nrf51822 EVA kit with on it the QFAACA chip. KEIL v5.0.5, J-link V4.78, nRFGo Studio V1.16 and nrfGo SDK (zip) V4.4.2. The Softdevice on the Dongel and the ... (more)

756
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no
1

## Did I brick my board ?

I have nRF51822-EK I am not sure whats going on with it.

I can run LED blinky example nicely ( no surprise :D )

But when I try to run softdevice examples like heart rate, proximity etc its not working.

I programmed ... (more)

8k
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1
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2

## How to start with nrfStudio, Keil Uvision, IAR embeddworkbench [only windows 8]

Hi All, I am a beginner with nordic nrf 51822. I am confused between so many code development tools.I have a usb based nrf 51822 development board. I prefer to use microsoft WINDOWS 8 as development environment. Kindly help ... (more)

1k
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2

## BLE advertising using softdevice and heart rate sensor example [closed]

My question is regarding the adertising with the softdevice on the heart rate sensor example.

My starting point is the following: 1. I connect PCA10001 / PCA10000 from Evaluation Kit to usb 2. Using nRFgo Studio 1.15.1.2691 a ... (more)

5k
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2
1

## ADC Reference Selection nRF51822 [closed]

I am completing a schematic using the nRF51822 part. I will be supplying the part with a 3.3V supply. I will use one of the ADC inputs to sense battery voltage (up to 10v max and 4v min). A ... (more)

310
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1

## No discovery with sample heart rate app

Hi,

I am using the nRF51822 evaluation kit, and have been unable to get it working. I compiled the sample BLE Heart Rate sensor program and uploaded it to the evaluation kit board, but the provided dongle (accessed through the ... (more)

719
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1

## nRF51 Flexible GPIO Feature

Hi,

I'm trying to make the nRF module work with an older IO demo board. Does the flexible GPIO system via pin crossbar allow you to modify the pin assignments of the SWDIO or SWDCLK pins? In the description ... (more)

1k
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6

## Proximity profile on nRF51822 with iOS app. Failed to connect.

I've just flashed the softdevice 5.2.1 and BLE Proximity sample app to my nRF51822. I presume any previous bond state on the device should have been wiped by doing this.

If I now start the nRF Proximity ... (more)

660
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1
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4

## _build directory missing in blinky_example in SDK v5.0.0.34603

Hi all,

I am currently working on a BLE project based on the PCA10001 evaluation board. I am trying to follow the nRF51 application note. I have done everything that the application note describes, although based on Kepler instead of ... (more)

2k
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2
3

## app_uart getting started

I've modified the simple_uart example to use app_uart instead but I cannot get any data transmitting. I know the connections are correct because it works fine under normal simple_uart testing.

Here is my init code which also sends a ... (more)

681
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no
1

## iOS Low Power limitation !

Hello,

I developed a BLE based application using nRF51822 softdevice S110.

This application is very low consumption. The device connects every 60 seconds, and can send an alert if you press a button.

# Define MIN_CONN_INTERVAL MSEC_TO_UNITS (200 UNIT_1_25_MS)
# Define MAX_CONN_INTERVAL ...
(more)

497
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2
1

## Request: Update nAN-29 with Mac OS X instructions / paths

It would be nice if you could update Application Note 29 ("Development with GCC and Eclipse") for the nRF51822 to include instructions for Mac OS X.

I don't think it's hard to get it to work, but it ... (more)

895
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1
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6

## AN36 modifications

I want to add to lbs service battery service(bas) as well. One of the changes is in the advertising_init() function:


{
uint32_t      err_code;
uint8_t       flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

{
{BLE_UUID_BATTERY_SERVICE, m_lbs.uuid_type},
{LBS_UUID_SERVICE, m_lbs.uuid_type ...
(more)

191
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no
1

## is there anyone help me tocheck the antenna?

ask for some help with antenna. antenna used on nrf51822DK board, thickness and demention. i have an eagle file, but i can't upload it here.

1k
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1
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3

## CURRENT CONSUMPTION OF NRF51822 DEVKIT - PCA10001 v1.0

Hi,

I am using the PCA10001 v1.0 from the development kit and am having trouble measuring the same current as the one from the specification. I am using the ble_app_proximity example and measure 25-30uA between advertising peaks whereas around ... (more)

1k
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2
1

## Problem with writing value to gatt attribute in connection.

Hi. I have a problem with writing value to gatts attribute when device is in connection mode. In my application I want to check if the parameter writing by the client to server's attribute has a proper value and ... (more)

1k
views
no
2

## Is it possible to use SDK tools without evaluation/development kit?

Hello, i would like to know if its possible to use your SDK tools (S110 Soft Device, nRF51 SDK) without your evaluation/development kit. Since RFduino has a RF51822 chip, i would like to know if I can use your ... (more)

311
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no
1

## What do LEDs 0 and 1 indicate in the ble_proximity sample app?

Here are some constants from main.c for the other LEDs, but what do LEDs 0 and 1 indicate? 0 seems to be on when advertising. 1 when connected? What about pairing/bonding state?

#define ALERT_LEVEL_MILD_LED_PIN_NO NRF6310_LED_2 /< Is on when ... (more)

848
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6

## Problem Loading Bonding Info From Flash

Unless manually set the value of bond_init_data.bonds_delete to true in the function bond_manager_init to clear bonded masters, I end up in the HardFault_handler. The last call I can trace is line 641 in pstorage.c,memcpy (p_dest, (((uint8_t *)p_src- ... (more)

1k
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no
1

## max GPIO sink current on nrf51822

How much current can the nrf51822 sink per pin? In the datasheet, I can see that it is at least 5mA. I also see that the chip can drive 3 pins at 5mA, but can it handle more as a ... (more)

480
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1

## NRF Utility source code

Hi there

This app is able to detect the nrf51822 chip even with android 4.1, which is great, so I could test my firmware on my samung.

Thank you Cheers OL

1k
views
1
vote
2

## How to react in __WFI ( )?

Hi,

i need to meassure Digital ports when i am in __WFI (); I noticed that WFi will hold the CPU so how would it bee possible to to react on digital Pins? Is it possible to measure with GPIOTE the ... (more)

567
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1

## How to send the VIRTUAL_CABLE_UNPLUG request ?

Hi: chip:nRF51822 code:ble keyboard

How to send the VIRTUAL_CABLE_UNPLUG request by Bluetooth HID devices?
If Virtual Cable Unplug is received by a Bluetooth HID device ,how can i know?

HID_SPCE_V11.pdf (HUMAN INTERFACE DEVICE PROFILE 1.1)
3 ...
(more)

1k
views
2
5

## Any more information on the ble_app_ancs project?

I've downloaded the latest SDK and soft device. I've been able to compile the ble_app_ancs project, run it on my dev board and even connect to my iPhone. Although I'm getting assertions when I try to connect ... (more)

550
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no
1

## Building a BLE USB dongle

Are there any information about how to build a BLE USB dongle with nRF51822? Cheers,

505
views
1
vote
1

## Is the S110 softdevice v6.0.0 conpatible with all hardware revisions?

We have some hardware versions of the Nrf51822: build BA, CA. Is the new S110 v6.0.0 softdevice compatible with these hardware versions?

If it is not compatible, wich softdevice version have the best compatibility for these hardware versions?

1k
views
1
vote
3

## nRF51822 HID example - delay between characters

Hi,

I'm using SDK 4.4.2 and softdevice 5.2.1 to try the HID example. Although it is provided for the nRF6350 kit, I ported (buttons and LEDs) the example to the EV kit (PC1001) and I ... (more)

1k
views
no
5

## DEADBEEF in my Code but from where?

Hi,

i have a big Problem, if i debug my code i get in some cases in register 3 the value 0xDEADBEEF and after that the device doesn't work any longer in a correct way. No i had debugged ... (more)

686
views
no
1

## Setting up ARM GCC and Nordic SDK

I am beginner on this platform. I was hoping for KEIl IDE to aid my development, but since license fee is more, i wanted to try GCC platform. But unable to set it up. In nAN-29 pdf, chapter 2 document ... (more)

#### Statistics

• Total users: 26301
• Latest user: Thalia Despeissis
• Resolved questions: 11537
• Unanswered questions: 4027
• Total questions: 28684

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