# 14,176 questions

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## Find pinout LIS3DH

I've a board with the nRF51 inside and a LIS3DH as accelerometer.

I already reflashed and I want to read the accelerometer values from the LIS3DH but I don't know where it is attached (it is an smd ... (more)

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## State diagrams for BLE and Nordic services?

I started looking at the alert notification example. I just can't see how people understand the complex state sequences the peripheral (or central for that matter) go through just from the example code and the inadequate SDK documentation. Did ... (more)

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## Setting DFU_APP_DATA_RESERVED

I am struggling with the correct value to use for DFU_APP_DATA_RESERVED in the bootloader. My application uses the Device Manager and has one block allocated for to pstorage. I know i need to account for my pstorage block but do ... (more)

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## Response for 'Start DFU' received - Status: Data Size Exceeds Limit

Hi, Guys,

I am integrating the proximity app with dfu, everything else goes well. However, when I try to update bootloader through dfu, it failed. I check the MCP log, found that the issue is when MCP initial the update ... (more)

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## Error with multiple UART

Hi, I am trying to connect a GPS through UART to nRF52 and get the reading and write it to the serial USB of my PC. I am using app_uart_init() and app_uart_close(). My idea is to init the GPS UART ... (more)

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## Problem with simultaneous transmission and reception

Hi all again guys! I am experiencing a problem with my application: i have a beacon that is sending ADC converted values to a nrf51 DK (via notification), which is connected to the pc to receive these values via USB ... (more)

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## Question about using NFC to pair example

Hi, I am about to purchase PCA10040 V1.1.0.

I heard that one has the latest chip revision nRF52. (ref. link)

I'm very excited to start with the new feature in nRF52; the NFC feature.

However, it is ... (more)

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## FreeRTOS RTC Prescaler Produces Incorrect Time

In SDK 11 the FreeRTOS port has the following line is declared in portmacro_cmsis.h

#define portNRF_RTC_PRESCALER  ( (uint32_t) (ROUNDED_DIV(configSYSTICK_CLOCK_HZ, configTICK_RATE_HZ) - 1) )
In the above example configSYSTICK_CLOCK_HZ is 32.768kHZ and configTICK_RATE_HZ is 1.0kHz.


According to the nRF52 datasheet ... (more)

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## nRF51-DK to program nRF52

Quick question: Can I use the nRF51-DK to program a nRF52 device like NRF52832?

Thank you

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## NRF_ERROR_INTERNAL from a pstorage_store() call?

I received a NRF_ERROR_INTERNAL error from a pstorage_store() function. As far as I can tell this error should not result from this function. It occurs fairly randomly. This function is called regularly successfully. I'm not sure how I should ... (more)

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## CMSIS DAP build for Ble Nano MK20D Board

I want to use the CMSIS-DAP provided here https://github.com/NordicSemiconducto... with the ble nano MK20D board. I don't need to make any changes to the bootloader. Just the firmware that reads the hex and flashes it to ... (more)

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## What is the difference between the DEVICEID and DEVICEADDR?

I've looked at the reference manual and the several forum questions asking the same question and do not understand the answers as they all seem to point to the same docs/original posts that just confuse me further. My ... (more)

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## Debugging a Hardfualt

My app is generating hardfualts. Based on this post I looked at memory location SP + 0x14, which points to the address that generated the fault.

Memory at SP+0x14: 8F 31 02 00, which is address 0x0002318F. Which points to ... (more)

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## nRF51822 with 3.6V lithium batteries

Hi there,

I know 3V lithium batteries (Lithium Manganese Dioxide) batteries would be perfect for the nRF51822, but we're wondering if Lithium Thionyl Chloride (Li-SOCl2) 3.6V batteries would work as well. The datasheet for the nRF51822 says the ... (more)

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## How to update DFU from SDK 6.1 using nRF Toolbox

There are a couple of threads in the Developer Zone which mention backwards compatibility issues for nRF51822 BLE with DFU. Some of these are focussed around MCP (Master Control Panel), and suggest using nRF Toolbox (our preference, anyway), and another ... (more)

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## RTT logging: no output in SDK 11?

Hi there,

I'm in the middle of migrating an application from SDK 10 to SDK 11. In the SDK 10 version, I had RTT logging working just fine. I'm developing on a Mac so I had to start ... (more)

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## Migration guide from SDK 10 to SDK 11

Folks,

Is there a migration guide from SDK 10 to SDK 11? I am using s110 v8.

Thanks,

-ujwal

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## DFU OTA for Custom Application

Hi,

I have implemented a custom application(Lets name that file app.hex) which works and sends the data to phone via BLE on my nrf51822 DK. I am using the s110 v8 softdevice(Lets name it sd.hex). I ... (more)

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## Print data to eclipse console/terminal for nrf52 on OSX

Hi,

I am using eclipse IDE and gdb to debug and flash applications onto nrf52 dk. I wish to be able to print data and messages to the eclipse console. I work on mac OSX. How can i achieve this ... (more)

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## Configurating BLE on NRF52

Hi,

I`m a newbie user of nrf52, i want to know what are the neccesary libs to configure the BLE on nrf52 and what are the steps from the scratch.

Thanks

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## peer manager and iPhone encryption key

I'm testing pairing and bonding with an iPhone running iOS 9.3.1 and nRF52832. I'm running into trouble when reconnecting to a previously paired device.

The first time I pair and enable encryption, everything works perfectly. The ... (more)

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## SPI DMA transfer Fails for large buffer

HI All, We are using NRF52, S132 Softdevice , SDK 11.0.0.

In SPI DMA transfer, when we try to increase size of the m_tx_data greater than 254 bytes, it failed. It is working when the size is less than ... (more)

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## How to minimize current consumption for BLE application on nRF51822 [closed]

How to minimize current consumption for BLE application on nRF51822

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## Start a TWI transfer again

Hi, I would like to handle in the twi_event_handler the case when the p_event->type == NRF_DRV_TWI_EVT_EVT_DATA_NACK differently and not treat it as an internal error.

If there's a error with the TWI transfer that result from a DATA NACK ... (more)

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## Two way communication in BLE Heart Rate Sample App

Hi,

I am using nRF5_SDK_11.0.0 to learn how to use BLE stack to communicate. For the BLE HRS app, I want to achieve sth. like this: Central node can configure the sending rate of peripheral node; not only ... (more)

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## BLE UART +ANT

ble_ant_app_hrm.rarHi!! I want to design dual mode(BLE UART +ANT) but unfortunately I can not built it well. Can anyone tell me what kind of function or parameter? I based on example of ble_ant_app_hrm in nRF51_SDK_10.0.0_dc26b5e.

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## Ble nano Arm gcc hex format

I am using em::blocks and arm gcc with ble nano from readbear labs. I built the template example but it is not working. The output hex is the same as if i had built it with eclipse and used ... (more)

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I didn't manage to find a solution to my problem here but I fixed it myself so I'm posting it just in case it helps someone else.

I installed JLink 5.12.6 and nRF5x Command Line Tools ... (more)

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## Direct nRF518 - windows PC / laptop communication tool for dummies?

Hi.

Is there a (lazy) (dummy) comfortable way to make an nRF518 chip (in my case, nRF51822) communicate with the built-in bluetooth adapter of a laptop with windows 7 or 8.1 (or 10)?

As far as I know, there ... (more)

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## S130 ble_app_uart missing data

When I use the example of ble_app_uart(SDK : nRF5_SDK_11.0.0_89a8197) to measure data througput ,I find that i cannot get the complete packet of 20 bytes. The operation is that : I send 20 bytes at one time to my ... (more)

#### Statistics

• Total users: 11977
• Latest user: Clarice Forman
• Resolved questions: 6289
• Total questions: 14176

## Recent blog posts

• ### Measuring Lithium battery voltage with nRF52

Posted 2016-05-23 13:57:21 by Ole Bauck
• ### Hexapod using nRF52 DK - Part 1: Intro and hardware

Posted 2016-05-19 16:52:25 by Ole Bauck
• ### Enjoy a simple Android game using BLE

Posted 2016-05-13 10:09:58 by Brian Kim
• ### nRF Connect v1.0 Release Candidate

Posted 2016-05-09 15:34:15 by Bjørn Inge

Posted 2016-05-09 12:27:07 by Brian Kim

## Recent questions

• ### Find pinout LIS3DH

Posted 2016-05-28 17:54:32 by Pascal
• ### State diagrams for BLE and Nordic services?

Posted 2016-05-28 17:41:43 by Henry Choi
• ### Response for 'Start DFU' received - Status: Data Size Exceeds Limit

Posted 2016-05-28 10:49:03 by nimalhuang
• ### Error with multiple UART

Posted 2016-05-28 10:17:19 by Tony
• ### Question about using NFC to pair example

Posted 2016-05-28 08:33:00 by Mango922