# 25,465 questions

32
views
1
vote
1

## Possible bug in SDK14 - TWIM - nRF52840PDK

Hello,

I was having some trouble communicating with another slave device thru TWI, I was not receiving his ACKs. So I decided to try to turn off internal pull ups following instructions in this other thread.

It did not work ... (more)

41
views
no
no

## Use micro_ecc_lib_nrf52.lib with Segger Embedded Studio

Hi,

I am actually tring to migrate a project from Keil to Segger Embedded Studio (SES) and i have a problem with the build of my project when tring to build ecc.c.

The program works perfectly with keil and ... (more)

34
views
no
1

## nRF52 DFU using iPhone objective C

My current app is in objective-C and I want to implement dfu in my app. Is there any framework that can be used in my objective-C project.

41
views
no
1

## communication between two nrf51422

Hi All,

I am working printer project where i will be using two boards , one is nrf51 dongle which acts as client(sends/advertise the data) and another is nrf51422 soc on my printer board which acts as server which ... (more)

208
views
5
2

## Graphics library

Hi everyone,

May I know does the nRF51822 SDK support any graphics library, like emWin, uC/GUI, or others? Because I would like to present a colorful and graphical on the display (a small size OLED or LCD).

p.s ... (more)

46
views
no
1

## Unable to print BLE devices Complete local Name?

Hi, I am trying to print ble device names around my board by scanning and i am able to print some devices and i am unable to print other device names even though they are advertising but by printing through ... (more)

55
views
1
vote
2

## send the data from nRF52832 to phone

The last time, i could wireless communication by pressing a botton. The next time, i wanna send the data to phone if the communication is established. i modified the source code of "main.c" of "void uart_event_handle", but i couldn ... (more)

31
views
no
1

## NRF_BREAKPOINT causes hard fault with ARM-GCC

I'm building a project for the nRF52832 using the NRF5-SDK version 14.0.0. I'm compiling using GCC 6.3.1 (arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors 6-2017-q2-update) 6.3.1 20170620 (release) [ARM/embedded-6-branch revision 249437 ... (more)

44
views
no
1

## 51822 DTM in BQB RF test

I made a pulse oximeter product with nrf51822AC(base on SDK5.2.0 & S110 6.0.0), and implemented SIG GATT-based profile（PLXP+PLXS). Now we want to do BQB RF PHY testing to test the low energy phy layer ... (more)

181
views
1
vote
1

## device reset

hi,everyone,i use the nrf52832,sdk11.Every now and then my hardware has reset,and l use the "NRF_POWER->RESETREAS" to read the reset cause, and the NRF_POWER->RESETREAS value is 0x00,I want to know what 0x00 represents?

236
views
no
2

## IAR 8.11 - Issue when compiling ble_app_uart example

Hello,

I get two errors when compiling examples\ble_peripheral\ble_app_uart with IAR 8.11. I have ble_app_uart_pca10040_s132 - nrf52832_xxaa as the active project.

I get the following errors: Error[Pe235]: variable "__stdout" was declared with a never-completed type D:\Projects\Nordic ... (more)

37
views
no
1

## FDS - Running out of Flash even with regular GCs - SDK13

I have defined the number of pages as 100 and the size of each page as 1024, which should be providing approx 400k of flash storage. I have 5 separate records that are being 'updated' via fds_record_update() every log interval ... (more)

22
views
no
1

## A UICR write operation has been requested but UICR has not been erased

I want to use GPIO9 + 10 as .. well .. GPIO.

Here's what I did:

• added CFLAGS += -DCONFIG_NFCT_PINS_AS_GPIOS in Makefile

UICR_NFCPINS ...

(more)

39
views
no
1

## 52832 antenna and matching network chips

Hi all, Refer as the antenna whitepaper, The Zs = 50 Ohm pi network need to match. I saw a matched pass filter optimized for nrf52832 from Johanson (Part Number:2450FM07A0029).

Do We just put this BPF close to nRF52832 chips ... (more)

14
views
no
1

## ble_uart problem with dfu

Hardware (HW)

• BMD 350 evaluation board, equivalent to PCA10040

Software

• nRF5 SDK 12.0. Keil uVersion 5 IDE.

• SoftDevice: s132_nrf52_3.0.0_softdevice.hex

• Firmware application (FA): nRF5_SDK_12.0.0_3bcc1f7\examples\ble_peripheral\experimental_ble_app_buttonless_dfu

Modified dfu main.c:

1. Add uart service init ...
(more)

55
views
no
3

## is it different between production year in nrf24l01+???

I have used nrf24l01+(production year=2015) in my project and my board and my program are working well......but when I change nrf24l01+(production year=2016) my board doesn't work at all....please guide me....

72
views
11
1

## The packet division by setting of ATT_MTU and DLE？

Hello,

We try to use "ATT_MTU" and "Data length extension (DLE)" to expand a packet in S132 SDK 14.0.0. When we set "ATT_MTU" > "DLE", please tell me what happens?

We thought data was sent by 1 packet when ... (more)

45
views
no
no

## Simple Thingy52 Firmware Change

Hey everyone,

I'm new to the Nordic/Thingy/Embedded world and was hoping I could get some hand holding to achieve a simple change.

I would like to change the Thingy sample project to display as "MyThingy" instead of ... (more)

36
views
no
no

## Application Compiler Settings

Hi,

nRF52832 SDK 14.0

I am using the ble_blinky app. Currently when I compile the application and flash it to the board, it gets flashed to these pages: 0x23000 to 0x27000.

Let's say I want to compile it ... (more)

69
views
no
no

## Central device can not find 2 services(0x1001,0x0001)

Peripheral device has 2 services,but central can find only 1 service(0x1001）. I want to find other service(0x0001) According to the message seems to be looking for 0x1001,but ! want to looking for every services.

I don not ... (more)

35
views
no
no

## HardFault_Handler Loop

At edit a file compile Run DEBUG , But Program Usually lead to unexpectedly run this loop for a period of time,How can I look for the origins of this bug

62
views
2
1

Hello!

We are performing certification testing for our product. We have nRF52832 chip on the board. We used "radio test" example to perform the test and almost all worked well. Except the RX part of the testing. When we choose ... (more)

939
views
3
1

## Designing BLE Characteristic Layout

Hi All,

I'm currently designing my implementation of BLE Services/Characteristics and wanted a quick review to make sure I'm on the right path based on my implementation. For example, here are my product requirements: (Note that this ... (more)

73
views
1
vote
no

hai

i am using mbed to program my nrf51822. in my application i need to read two analog sensor values. i am using p5 and p6 pin for that.

 AnalogIn   analog_pin_1(p5);


now i have a periodic ... (more)

27
views
no
no

## FATFS example does not working on nrf52840 PDK

Hello every! I am testing FATFS example with nrf5284 PDK . CLK - P1.15 MISO - P1.14 MOSI - P1.13 CS - P1.12 My micro sd card module work correctly with STM32 MCU. I rebuild FATFS example and load it to ... (more)

35
views
3
1

## Can I use a newer softDevice(v5) on an old SDK(SDK12.2 SoftDevice v3)?

Hello

I was wondering whether is possible to use an updated version of the softDevice into an older SDK, my current hw is a nRF52832pca10040 DK

For example, I am currently working with the SoftDevicev3 since I use SDK12.2 ... (more)

25
views
3
1

## Link Layer ACK vs. Write_REQ

Hello,

can anybody tell me the exact differences between a Link Layer Acknowledgement and the Acknowledgement used by a write Request? Does anybody have some statistics about packet loss that might occur if one is only using WRITE_CMD instead of ... (more)

30
views
no
no

## Error: flash is not erased

Hi everyone,

I'm trying to compile my own bootloader. I had this error when trying to flash it into my module:

SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)

MEMORY
{
FLASH (rx) : ORIGIN = 0x0003c000 ...
(more)

21
views
no
no

Hi. I am trying to create a dfu zip file that contains the softdevice, bootloader, and application. I am DFU upgrading an NRF52 device from SDK v13 to SDK v14 via Nordic's Android nRF Toolbox DFU app. I can ... (more)

105
views
1
vote
1

## How to access LE discoverable flags on iOS?

Hello,

is it possible to access the LE Limited/General Discoverable flags on iOS?

Thanks!

#### Statistics

• Total users: 24450
• Latest user: Nelly Rackley
• Resolved questions: 10451
• Total questions: 25466

## Recent blog posts

• ### 6 Things to Know about Bluetooth Beacons

Posted 2017-09-22 08:27:00 by Rose Martin
• ### Creating a Keil project for a Bluetooth Mesh example

Posted 2017-09-19 12:08:11 by Kristian Skordal
• ### Using millis() like in Arduino.

Posted 2017-09-18 11:58:04 by schef
• ### Flashing nRF5x firmware using any dumb terminal program via standard serial COM port

Posted 2017-09-18 03:53:40 by Nguyen Hoan Hoang
• ### How to Debug the nRF52 Interrupts — Useful Tips

Posted 2017-09-13 15:15:22 by Yaniv Nis

## Recent questions

• ### Device crashes when debug flags are turned on

Posted 2017-09-24 04:09:33 by tyler
• ### nrf52832 of UART problem

Posted 2017-09-24 04:05:27 by lenli
• ### RTT Stability

Posted 2017-09-24 03:28:49 by Yatekii
• ### HardFault with GPIOTE & SD

Posted 2017-09-24 03:18:09 by Yatekii
• ### Adding a service to existing SDK example code

Posted 2017-09-24 02:45:24 by alikob