# 193 questions

Tagged
• x
12
views
no
no

## changing include path of an example

Hello, I would like to copy ble_app_uart_c example to a seperate folder and work with that independently. I looked into the following thread and changed my include paths. https://devzone.nordicsemi.com/questi...

But I am unable to locate config ... (more)

31
views
no
no

## Cannot compile NRF51 Samples

I was compiling a project(ble_app_uart and I am using PCA10028), it was not successful and KEIL5 display this: it looks like I didn't install NordicSemiconductor.nRF_DeviceFamilyPack.8.11.1.pack according to the message (in fact, I already ... (more)

25
views
no
no

## nRF51822 beacon example on custom board

Hi there,

I'm trying to run the beacon s130 pca20006 example on a custom board. There are 2 main differences between the pca20006 and my board:

• There is a 32 Mhz oscillator on my board
• There is no LF ...
(more)

22
views
no
no

## Connect via external MCu

Hey, I am using WT51822-S4AT module and want the nrf51822 to connect to phone. I don't have nrf51-dk. I am using stm32f0-discovery kit. Can it be done using that kit? I searched for examples but coudn't find anything.

33
views
no
no

## Issue with MPU9250 and nrf52

Hi,

I have been working on MPU9250 examples given in here.Though the program runs fine in KeilUvision 5, the output in tera term shows only 0,0,0 for Accelerometer values in X,Y and Z. I connected the ... (more)

35
views
no
no

## NRF51822 UART hangs and requires power cycle

Hi,

I am making a GPS tracking system using NRF51822-QFAC. I am using 2 UARTs, one of the (external) GPRS IC and one for (external) RS485 communication.

The UART peripheral hangs after some time. I don't know if it ... (more)

34
views
no
no

## Cannot step past second instruction in disassembly window

When I run the UART app nRF5_SDK_12.3.0_d7731ad\examples\peripheral\uart in debug mode, the disassembly window opens, and I seem to get stuck on the second instruction. Step over doesn't step past the second instruction. Why is ... (more)

46
views
no
no

## PWM control using accelerometer

hello friends,

i need to control 4 LED brightness using PWM according to accelerometer values. how can i do that

i am using SDK11, nrf52832, KEIL MDK5

i going to attach main file what i am doing wrong please check ... (more)

102
views
no
no

## keil flash nrf52 problem

Hi! I try to flash nrf52 from keil and message appear: The firmware of the connected J-link (S/N: xxxxxxxx) does not support the following memory access: Read @ 0x02000004 Flags: via AHB-AP ???

Via nrf go studio I can flash SD ... (more)

100
views
no
no

## Is there a Completed Code BLE Characteristics, from the beginner's tutorial ported for SDK version 12.3?

Hi,

I'm a beginner of BLE and I did everything from the three BLE tutorials, that uses sdk 11. However when I try to do it in sdk 12.3 it doesn't work, because there are some changes ... (more)

46
views
no
no

## Why is the function "gpiote_init()" conflicting with the bluetooth code?

Hello, I tried to add the code of the bluetooth tutorial called "Bluetooth low energy Characteristics, a beginner's tutorial", with a code that measures the delay of two forms of waves, but when debuging them together there is a ... (more)

48
views
no
no

## Simulated I2C

HI! The use of simulation software I2C and the sensor module communication in my program, without the use of the protocol stack, the normal running of the program, but after entering the protocol stack, when I want to read the ... (more)

68
views
no
no

## the device does not have required service

hello i am working with simple ble mpu example it is working fine but when i am trying to connect nrf52 DK with my android phone over bluetooth it is showing

the device does not have required service.

32
views
no
no

## NRF52832 erase_bonds = 0x01

When I change ATT_MTU size and add the following code: #define CONN_CFG_TAG 1

// Configure the maximum ATT MTU.
memset(&ble_cfg, 0x00, sizeof(ble_cfg));
ble_cfg.conn_cfg.conn_cfg_tag                 = CONN_CFG_TAG;
ble_cfg.conn_cfg.params.gatt_conn_cfg.att_mtu = NRF_BLE_GATT_MAX_MTU_SIZE;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GATT, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code ...
(more)

45
views
no
no

## can't program nrf52832ciaa

can't program nrf52832ciaa

I can connect the core through segger commander

I can erase the chip after push the download bottom in the keil 5 ,and erase the chip

but I can't program , what's wrong ?

143
views
no
no

## how to write a functions(program) for transmitting and receiving data over uart using nrf 51822?

Hi, there i am using nrf51822 to communicate with quectel ec25 .i want to send AT commands over uart and receive some response from quectel.for eg. i am sending a "AT" command i should get "ok" response in return ... (more)

99
views
no
no

## MPU9250 is not showing output

i am working with mpu xx example given in nordic website. it seems code is working fine i.e. compiling and dumping into nrf52 DK, But not showing any output values.

i was trying to run nrf5-mpu-simple example but not ... (more)

50
views
no
no

## iot stack compile for nrf52822

Hi,

I get following error when i try to compile nRF5_IoT_SDK_v0.9.x for target nrf52822

compiling x509_csr.c... assembling arm_startup_nrf51.s... <command line>(13): error: A1517E: Unexpected operator equal to or equivalent to < compiling x509_crt.c... compiling system_nrf51.c ... (more)

33
views
no
no

## How to turn on Leds only for advertising time?

Hi, i am using SDK v8.0 and in main function, initialization like this err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), button_event_handler);  and

in advertising_start function, calling function is err_code = bsp_indication_set(BSP_INDICATION_ADVERTISING); this is working. but i want like this ... (more)

41
views
no
no

## Parsing Device_name

I have a number of nRF52832 beacons that advertise at a set interval. All the beacons have a "device_name" set as "ECO". My application scans for these beacons with the device_name == "ECO". When the application reads a beacon device_name of ... (more)

75
views
no
no

## Battery Power problem

I am using nRF52840 board. And I used keil and nrfjprog, both successfully flashed the hex file onto the board with USB connected. The example I used is ble_app_uart_c.

My program runs fine, but once I disconnected the USB cable ... (more)

60
views
no
no

## Any one can help me with source code of mpu9250 and nrf52 DK

As i am new i don't know from where i have to start if anyone help me with this it would be a great help to me

22
views
no
no

## Cannot open Source input file

I am a newbie to Nordic thingy and Keil. So please help me with this. I downloaded SDK and opened it in Keil. It asked for updating software packs update and it was done. When I tried to build the ... (more)

28
views
no
no

## NRF51 Custom Board - Keil Works but Makefile Does Not

Hello,

I have an NRF51822 custom board. I am trying to flash the code under

C:\Users\Home\Desktop\nrf51\nRF5_SDK_12.3.0_d7731ad\examples\ble_peripheral\ble_app_uart\pca10028\s130


I am trying to flash it with KEIL and it works. I ... (more)

34
views
no
no

## Register RPD in NRF24LE1

Im try to read the RPD register, but always get the same value RPD=0

uint8_t channel=0;
int index;
hal_nrf_set_operation_mode(HAL_NRF_PRX);
hal_nrf_set_power_mode(HAL_NRF_PWR_UP);
CE_HIGH();
for( index = 0; index<126; index++)´
{
hal_nrf_set_rf_channel(channel);
if(hal_nrf_get_carrier_detect())
{putstring("Channel Busy");}
else { putstring ...
(more)

96
views
2
no

## Timer Example Issue

I'm building a new application based on the no softdevice template example. I pulled in the code from the UART BLE example to redirect printf to the serial interface and that works. Next I wanted to add a timer ... (more)

40
views
no
no

## USB disconnected and program fail

I am using nRF 52840 board. I used Keil 5 to load one of the examples in SDK successfully, but when I unplug the USB cable and used the battery. My program doesn't run properly.

The phenomenon is that ... (more)

37
views
no
no

## system halted when disconnect the bluetooth

The device use SDK9.0,during the using of device,when disconnect the bluetooth of phone system sometimes,the system halted.

So I make an experiment about the probability of the situation happened,generated a android app: connect the device ... (more)

101
views
no
no

## Micro-ecc library won't compile

Hi,

I'm trying to get BLE pairing example to work. I downloaded the missing micro-ecc library and I encountered this problem: https://github.com/kmackay/micro-ecc/...

So I've compiled this library with Bash on Ubuntu on Windows and ... (more)

32
views
no
no

## Failing in build when changing directory structure

I'm building wih Keil MDK-Lite Version 5.24.1 and I just copied the examples for gpiote into my own folder, everything was kept the same (ie copying from C:\Nordic\nRF5_SDK_14.0.0\examples\peripheral\gpiote to C ... (more)

#### Statistics

• Total users: 25645
• Resolved questions: 11252
• Total questions: 27774

## Recent blog posts

• ### The KEY POINT of example "ble_app_uart"

Posted 2017-12-12 18:07:28 by QQ645116977
• ### Introduce smart motion controller - ELIO

Posted 2017-12-12 05:09:05 by caram5555
• ### The world's smallest breakout board compatible BTLE module: Automate your curtains for less than \$90 with BluChip!

Posted 2017-12-07 09:10:36 by Jeevan Anga
• ### Join Jumper's free beta for a Virtual nRF52832 device to streamline your R&D process

Posted 2017-11-27 12:53:04 by Yaniv Nis
• ### PSG-NORDIC Channel in YouTube

Posted 2017-11-27 11:08:04 by Mugelan

## Recent questions

• ### disconnect time

Posted 2017-12-13 10:26:24 by roger.k
• ### app_timer / softdevice S132 / sd_app_evt_wait

Posted 2017-12-13 10:01:18 by Mark.Thielen
• ### nRF52832 Power on Reset and nRESET

Posted 2017-12-13 09:03:45 by ogura
• ### Behavior when a single PPI channel triggers 2 timer tasks

Posted 2017-12-13 08:30:21 by XavierYin
• ### Where to put APP_TIMER_DEF without error or warning?

Posted 2017-12-13 08:29:12 by tyler