# 17,338 questions

29
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## How do I advertise and write to flash storage concurrently?

I have a BLE device that listens for a connection - upon opening a connection with a smartphone and switching advertising status to non-connectible - it receives some data, reads the battery, and writes to flash storage - the phone disconnects and depending ... (more)

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## Need NRF8001 to advertise while Microcontroller asleep.

I'm using an NRF8001 with an ATMEL ATMEGA 328P (the microcontroller from an Arduino). I need the microcontroller to go to sleep, but still allow the BLE chip to advertise and wake the microcontroller upon connection. It seems as ... (more)

7
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## nRF24L01+ Fake?

Hi,

I'm using a RF module with nRF24L01+. Sometimes the RF stop working, the module keep replying status of no rx data (all pipes).

The device is embedded into a device used along with valves and motors. I guess ...
(more)

4
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## Why when i compile a proyect the files .h not being created?

I use nRF51 DK and soft device s130.

I nedd to add a file ("app_uart_fifo.c") in the example of multilink central, after i add the file i build the proyect but the files .h never being created. I have ... (more)

34
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## Will Nordic Work For My Application?

I'm working on a project where I need to recognize whether or not a wireless tag is within 5-10' of a stationary reader. I would develop the reader system using a module, and the tag (hopefully) would be off ... (more)

56
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## How to use the default connection paramater as set by the central?

I'm using the nRF52 + SDK11.0.0 + s132 and the ble_hrs example. The function conn_params_init() is called to initialize the connection parameters that the peripheral will request, but where is the actual call to request the new connection parameter ... (more)

8
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## nRF51822 UART maximum speed without flow control

I am using the nRF51822 in an application where I want to run the UART as fast as possible to communicate with a host processor. I have been able to get reliable communication with the host processor up to 115 ... (more)

4
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## Using sd_ble_gattc_characteristics_discover

Hi,

I'm trying to use sd_ble_gattc_characteristics_discover to figure out which characteristics are in a service.

On the whole it seems pretty obvious (keep calling sd_ble_gattc_characteristics_discover and handling the BLE_GATTC_EVT_CHAR_DISC_RSP event for each characteristic within the range reported for the ... (more)

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## From development to mass production

Hi,

I'm developing a FW that is now validated. We are "almost ready" to go in mass production (6000 PCE for the first batch).

For the moment, I'm still using the debugger with the NRF51DK. The programmation is ... (more)

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## nRF51 to 24L01P ESB duplicate packet

Hello,

I am currently testing the nRF51 series as a possible upgrade to our products that use the 24L01P. For testing I have the nRF51 dev board setup as the PRX and a custom board with an 24L01P as the ... (more)

30
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## How to operate PWM and softdevice at the same time?

I`m trying to operate PWM and soft device at the same time. I have to make 4 Mhz using PWM block so I checked the PWM driver. There is no problem when using peripheral/pwmdriver.

However,when I applied ... (more)

47
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## Older DFU application valid issue

Hello,

There have been some questions on the forum regarding the DFU and it's zero value for the application CRC. However, none of them seem to address this question so I thought I would float it out here and ... (more)

68
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2

## nRF52 returning error code 7 when trying to set proprietary UUID in advertising data

I'm using the nRF52 + SDK11.0.0 + s132. I started with the ble_hrs example and modified it. I now want to make the service/characteristics use proprietary UUIDs and I'm following the ble_app_uart example. I set the uuid ... (more)

29
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1

## NRF51 SWD flashing

Hi everyone,

I implemented nrf51 flashing through SWD (external MCU is used). After first flashing and reset when we enter debug mode on SWD second time we have a busy state (NVMC_READY (0x4001E000 + 0x400) is set to zero) from NVMC ... (more)

60
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## Too high throughput?!

Hi,

I'm using an nRF52832 with the S132v2 and SDK 11 and wanted to test the ble throughput. The nRF52832 should send as many as it can to an "normal" BLE-USB-Stick.

The strange thing is, that my windows application ... (more)

37
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## Migrating nRF52832 layout from QFN to WLCSP

When designing the layout for my circuit using nRF52832 I've noticed that the values of CL connected to the ANT pin changed from L= 3.9nH and C=0.8pF to L=3.3nH and C=1pF.

The value ... (more)

32
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1
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1

## What is the gain (dBi) of the rubber duck antennas in nRF9E5 Evaluation Kit?

What is the gain of the antenna in dBi?

26
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## Fstorage read and write at SDK11

I want to use fstorage to write data to a file. The File with three records: 0x1111="Tablet1", 0x2222="data: abcdef", 0x3333="26". How to implement it? Can anyone guide me?

42
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## RADIO ramp-up - what registers (if any) are latched?

I am trying to send lots of data through radio (basing on old micro esb project from github, but heavily modified). I need to keep radio IDLE (not DISABLED) when not transmitting, because ramp-up time sometimes is too long and ... (more)

39
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1
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2

Hi - I have been unsuccessful using Master Control Panel 3.10.0.14 on win10 to send a new application to a pca10028 with running initial application that supports DFU. What am I doing wrong?

Here is what I am ... (more)

35
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1

## Error Writing Large Characteristics

I am working on a BLE peripheral. I have a large, variable length characteristic I need to set from the central.

When the central is the BTool, I can write up to the maximum size of my characteristic, which is ... (more)

36
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1

## nrf51822 send media key to android device

hey I have a nRF51822 eval board and I want to use it as hid keyboard to send some media key such as vol+/- play/pause, etc. I have used the example code ble_hid_keyboard and it works well to send ... (more)

50
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## nRF52832 SAADC error versus temperature

I'm using the SAADC of an nRF52832. I'd like to reduce the error of my measurements from the nominal +/-3%. I'm calling the NRF_SAADC_TASK_CALIBRATEOFFSET periodically to reduce errors, but I do still measure errors that are in ... (more)

15
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## nrfutil.exe, cannot generate keys

Hello, I'm trying to generate DFU keys with the nrfutil.exe tool from Master Control Panel 3.10.0. I always get errors....

C:\Program Files (x86)\Nordic Semiconductor\Master Control Panel\3.10.0.14\nrf>n rfutil ... (more)

24
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## NurApi Linking Problem in Raspberry Pi [closed]

Hello,

I am using Nordic Nur-10W develop kit, trying to compile NurApiExample in Raspberry Pi. I wrote a Makefile, and complie process was OK. However, undefined reference errors show as below:

Here is my Makefile:

I use libNurApiRasPi.so as ... (more)

22
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1

## Pause peripherals when hitting a breakpoint?

Is there a way to pause all peripherals when hitting a breakpoint? In particular, I would like to freeze the RTCs when I hit a breakpoint. My app wakes up once a second, and I pause the code for too ... (more)

50
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1

## S132 and custom application start address

Hello, I would like to use a custom flash memory layout for the flash memory of nrf52:

I thought that I should be able to use the UICR.NRFFW[0] - if I set to the start address of my application ... (more)

33
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## Passkey security for particular services.

Hi,

I am Working on a BLE application in which I do not want to expose certain services until I am securely paired/bonded to a valid device. The problem is that during discovery, it seems that all primary services ... (more)

33
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## why ble_Uart and Rtc code not work in at a same time...

main.chello sir.. i m place rtc example code inside of ble_uart code .. and i m using gcc tool chain setup for pca10028 bord... code complile sucsessfully... code not work .... as per my requirement...main.h(/attachment/b55e54fec95f15b43a441dc5dab261fb)

37
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1

## MTU Exchange and default BLE_EVT_BUFFER size

Hi,

In the BLE_UART example code posted here, I noticed a discrepancy with the SD 3.0 migration document, SDK12, and the example code.

In stock SDK 12.1.0, ble_stack_handler_types.h has BLE_EVT_BUFFER defined with a size of [(sizeof ... (more)

#### Statistics

• Total users: 14465
• Latest user: Tayla Outhwaite
• Resolved questions: 7519
• Total questions: 17338

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## Recent questions

• ### Need NRF8001 to advertise while Microcontroller asleep.

Posted 2016-10-25 22:43:15 by mattsEE
• ### nRF24L01+ Fake?

Posted 2016-10-25 21:06:19 by Raphael Motta
• ### Why when i compile a proyect the files .h not being created?

Posted 2016-10-25 21:06:03 by Pablo
• ### nRF51822 UART maximum speed without flow control

Posted 2016-10-25 18:50:39 by Mark Bianchi
• ### Using sd_ble_gattc_characteristics_discover

Posted 2016-10-25 18:30:21 by Gordon