# 5,555 questions

Tagged
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6
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## How to expand the flash memory address?

Hi, all!

nRF51822 had been used in my project, because of dual bank bootloader and softdevice, the internal flash memory was not enough for the application. I want to know how to expand the flash memory.

I think a external ... (more)

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## AirFuel SDK 2.2.0 IROM and IRAM settings

I download "nRF5_AirFuel_SDK_2.2.0_7b89a57" and use "ptu_app_beacon" development, I am currently using "nrf51822-QFAA" and "nrf51822-QFAC", how do I set up IROM and IRAM?

6
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## I clicked 'fill with zero' in Jflash. Bricked the chip?

Hi,

By mistake, I clicked 'fill with zero' button in Jflash, may I ask, is my chip bricked because of this? Thanks.

The following lists my steps:

1) program the softdevice 4.0.2 in jflash

2) compile heart sample ... (more)

8
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## registers MMA7660

how i can write to MMA7660 registers in twi_master_using_app_twi example SDK?

51
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Our project uses a Raspberry Pi compute module 3 connected via UART to 2 nRF51822. I'll go through what is working and than describe the issues I'm having

What's going on without issues:

• The 2 nRF51822 are ...
(more)

34
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## nRF52 Development Kit Programming

How to setup a nRFDK52 as a central and nRF bluetooth kit as peripheral. Should I use nRF go studio? Do i need to load the soft device first before loading the app? What is the baud rate for communication ... (more)

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## Capacitance reading circuit for nRF51

Currently, we are trying to have the nRF51 chip working with a type of capacitive pressure sensor. We did quite a lot of work on searching proper circuits of reading the capacitance of the sensor, including capacitance voltage divider, charging ... (more)

29
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## Is there any advantage of using SPI interface over UART while connecting nBLE51822 to any MCU?

I have the option to connect nBLE51822 to MCU via SPI, UART or I2C. But is there any advantage of using SPI/ I2C interface over UART interface while connecting nBLE51822 to any MCU?

396
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## nRF52 DK - 20ms non connectable advertising interval

Hello, im experimenting around with the nRF52 DK (and nRF51 DK also)

Now I have following setup on nRF52 DK:

SoftDevice: s132 nRF52 v2.0.1

Applicatoin: Example Project from nRF SDK 11.0 (ble_app_beacon)

By the default the interval ... (more)

31
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## Ble Nano v1.5 schematic

Hi,

I am working with a nRF51822 chip placed on a Ble Nano v1.5 board and I would like the schematic of Ble Nano v1.5. Could anyone tell me where I can find the schematic of Ble Nano?

Thank you!

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## nRF51822 Tx power not able to set

Hello iam using softdevice 110 and SDK 10.0.0, Iam trying set tx power of nrf51822 using function sd_ble_tx_power_set(), i have tried 0dBm and 4dBm both are giving same RSSI and range, is it really configured or not how ... (more)

4k
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## Best place to get started

Hello everyone.

I've got the nRF51822 Evaluation Kit and Dongle. The heartbeat demo is working, so I got the toolchain -- Nordic, Keil, Segger under Win7 -- set up correctly, as far as I can tell.

I need to interface with ... (more)

25
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## Bond and change dev name

Hi: I want to bond and change dev name and storage. This is my storage dev name init code:

void my_flash_init(void)
{

uint32_t err_code;

pstorage_module_param_t param;

param.block_count = 1;
param.block_size = NAME_SIZE;
param.cb = my_cb;

err_code = pstorage_init();
err_code = pstorage_register(&param ...
(more)

62
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## Can nRF51422 or nRF51822 can be used as bluetooth device for Raspberry pi?

Can nRF51422 or nRF51822 can be used as bluetooth device for Raspberry pi?

As I can see on the terminal Linux, the hciconfig log says, raspberry pi 3's Bluetooth device is connected to board with UART Connection.

I'm ... (more)

102
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1
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## Certification/Qualification for Selling product

Hi all,

I want to sell a device that I have made that uses the nrf51822 and the app inside the chip is derived from the ble_app_uart. It uses two chips that communicate using a proprietary service.

What do I ... (more)

20
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1
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## Disconnections between iOS 8-10 and RedBear BLE Nano V1.5

We're having troubles with BLE connection between iOS 8-10 devices (iPad Pro, iPad Air 2, iPad Mini 3, iPhone 7, iPhone 6) and RedBear BLE Nano V1.5 32KB boards (with Nordic nRF51822 SoC on board).

The devices connect ... (more)

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## Using the SDK 11 with NRF6310

Hello, I'm working with the NRF6310 Motherboard and play with it a little with SDK 6.1, but i want to create profiles with the Bluetooth Developer Studio, so I started using the SDK 11.0 and test with ... (more)

25
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1
vote
1

## 51822+uart framing+break issues [closed]

Hi

for some reason I cannot connect any PC terminal to my custom board: I would get consistent NRF_UART0->ERRORSRC = 0x000c or 0x0004 indicating break and/or framing issue. I hope someone has any hints to help me out ...

Here ... (more)

49
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3
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## choosing soft device

Hi,

I have a question about choosing "correct" soft device. I need only peripheral connection, but I'm bit in doubt for choosing SD110, because compatible sdk ver 10.0.0 (compatibility matrix) is already two years old. https://developer ... (more)

34
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## Bond and data storage

Hi, I bonded is ok .But I want to store some data on nrf51822 flash memory using pstorage. What should I do?

Register new or change it :

param.block_size  = ALL_CONTEXT_SIZE;
param.block_count = DEVICE_MANAGER_MAX_BONDS;
param.cb          = dm_pstorage_cb_handler;

err_code = pstorage_register(&param, &m_storage_handle);


50
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2
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## Background ble operations with ios

HI, i'm trying to perform the following operations with the Core Bluetooth Framework of iOS:

1) Connection to peripheral

2) Services Discovery

3) Characteristics Discovery

4) Start Notify on a particular characteristic

These operations have to be triggered in ... (more)

30
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## nrf51822 ADC enable means what?

Is enable required before configuration? Does toggling NRF_ADC->ENABLE reset the configuration (like it does for the radio?) Is the power to the ADC automatic, so that even if enabled, it might be quiescent current?

The product spec, register description ... (more)

39
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1
vote
1

## Unit testing and emulating hardware

Hello,

We are trying to set up unit testing for our project however had trouble running it on the nrf51 board and decided to run it natively on a windows platform.

My question is what is the best unit testing ... (more)

14
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## Pstorage question for storage different size

hi : I want storage different size in flash.How can i do it? I can write like this?

param.block_size  = 16;                   //Select block size of 16 bytes
param.block_count = 1;                   //Select 1 blocks, total of 16 bytes
param.cb          = example_cb_handler ...
(more)

17
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1

## pstorage read and write time for one page

i need to know the read and write time in (ms). for one page

41
views
1
vote
1

## How to Close SWD

Hi there, We are developing bluetooth bracelet using 51xx and 52xx Bluetooth chip and the hard hardware part has been done.However, for safety considerations,we need to disable SWD after the program is downloaded. We want to disable SWD ... (more)

16
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1
vote
1

## Send out ADV packet in <100ms after power on the chip

I have download latest S130 SDK. And I try to send ADV in 100ms. Now it takes >= 250 ms. I use the scope and find SOFTDEVICE_HANDLER_INIT takes 248ms on PCA10028 board.

The softdevice I used is from: https://www.nordicsemi ... (more)

38
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## App stuck on "DfuTarg" when trying buttonless DFU

Hi everyone,

I'm using SDK 12.2 on nRF51822. Trying to get the buttonless dfu app example to work. Here's what I do:

Compile buttonless dfu app.

Generate settings:

nrfutil settings generate --family NRF51 --application nrf51422_xxac.hex --application-version ... (more)

29
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## LC filter on nRF51822

Hi,

I am using a nRF51822 board and I wanted to know if the LC filter is necessary if I don't need to use any analog entrance or exit. I just need the BLE and a digital input.

17
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## Unable to use Pstorage in my code

To @Hung Bui. Hello sir. I am new to NRF51 microcontrolers and I am trying to use Pstorage in my written code. I have noticed this post of your's:

I am using nrf51422 and and edited ble_app_uart example as ... (more)

#### Statistics

• Total users: 19674
• Latest user: Kenneth Lahey
• Resolved questions: 9408
• Total questions: 22333

## Recent blog posts

• ### The complete tutorial for developing and debugging nRF52 applications on a Mac

Posted 2017-05-11 04:13:06 by Mohammad Afaneh
• ### Bluetooth 5 2Mbps Demo with nRF52 Series and Samsung Galaxy S8

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• ### Setting up Segger on a mac or pc and debug - step by step for humans

Posted 2017-05-05 14:03:35 by Lola

Posted 2017-04-11 11:49:17 by Radosław Koppel
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## Recent questions

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• ### spi master example code

Posted 2017-05-24 06:15:44 by pavanvulichi
• ### Pairing and Bonding Question

Posted 2017-05-24 05:48:46 by sara
• ### How to expand the flash memory address?

Posted 2017-05-24 04:51:42 by tovax
• ### code of protocol stack which part of the Protocol I can modify?

Posted 2017-05-24 04:37:17 by desongli