# 2,341 questions

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## Notify to all connections

Hi.

I'm testing multiperipheral function, and have established multiple connections (1 single Peripheral with multiple Centrals). But it seems that the Peripheral can just notify values to the last connected Central.

Could you tell me how to notify values ... (more)

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## Undefined symbol ble_nus_c_on_ble_evt

Trying to port over code from UART example to muti-connect example.

Made sure include paths are correct, and made sure the following C files are in project.

ble_nus_c.c
nrf_pwr_mgmt.c


Also added following code to sdk_config.h

#define APP_UART_ENABLED ...
(more)

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## nRF52 Constantly Waking From WFE()

I'm trying to put the nRF52 into sleep by using the following code in a loop:

      __WFE();
__SEV();
__WFE();


But I see current consumption at around 5mA still, and when I debug I notice it the processor is constantly ... (more)

45
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1
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## ble_uart example with custom uart ISR

while the ble_uart example is a great resource of information, i have a need to completely separate the ble nus data in / out from the hw uart code

using sdk 14.2.0

i was able to put my own ... (more)

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## [bugreport] app_timer_stop() resets RTC1 counter when APP_TIMER_KEEPS_RTC_ACTIVE is set

My setup is as follows: nRF5 SDK 13.1 with s132 5.1.0 nRF52832_AA Keil 5.25pre

I use RTC1 counter for timestamping along with app_timer timers. My get_timestamp() function retrieves it's time value by calling app_timer_cnt_get() and ... (more)

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Hello there. I just recently started programming using the nRF52832 DK, SDK14.1.0 and SoftDevice 132 v5.0 . I tried to follow this tutorial on Github: https://github.com/bjornspockeli/cust...

Right after implementing my own custom service, the ... (more)

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## Could not find AHB-AP to communicate with Cortex-M core

Hi to everyone!

I have been testing and programming a nRF52832DK board (Bluetooth, SPI, NFC, ...) with, at the beginning problems and learning how to fix them, and in the end everything works successfully.

I am been programming in Keil uVision ... (more)

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## BLE mesh and Routing for high frequency Bridge sensors

I recently got involved in a project where I am deploying a ble based mesh to understand and monitor bridge vibration patterns. I have been through nRF's mesh capabilities, but they aren't enough high frequency and efficient for ... (more)

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## nrf52832 SDK13 PWM cant change duty cycle at first period

hello ,everyone

I was confused by a PWM problem for a long time , on nrf52832 SDK13 ,i wanna change the PWM duty cycle every period ,but now i find can not change it at first period but is correct operate ... (more)

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## disconnect time [closed]

Hi. I'm using nRF52832, SDK13.0.0 as peripheral.

When I want to disconnect central, I'm using sd_ble_gap_disconnect function as below.

    err_code = sd_ble_gap_disconnect(conn_handle_val, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);


I can get disconnected event immediately from "BLE_GAP_EVT_DISCONNECTED" case.

But somtimes ... (more)

24
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## nRF52832 Power on Reset and nRESET

in my circuit, it takes 17ms for VCC_NRF to go up from 0 to 1.7V and reach 3.0V, but nRESET PIN does NOT to go up to VCC_NRF. what is the potential cause of this problem?

here is ... (more)

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## Error run multi NUS

Hi all, I encountered a problem , when I connect 1 board central to 2 board peripheral via NUS . It connected and discovery success . But at

static void db_disc_handler(ble_db_discovery_evt_t * p_evt)

{

ble_nus_c_on_db_disc_evt(&m_ble_nus_c[p_evt->conn_handle], p_evt);

printf("db_disc_handler [0x%x]\r ...

(more)

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## Why is my service cccd_handle number wrong [closed]

Hello.

Nordic Team.

I add for ble Service and i select my service notify enable

I want receive my service number, but service number is different.

Add for my source code and I looking for example PCA10040 HRS service.

The ... (more)

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## Why is my service cccd_handle number difference. [closed]

Hello,

Nordic Team.

I don't understand 'ecg cccd_handle number ' 'p_evt_write->handle number' difference.

I add for ECG Service on my bluetooth profile.

ECG Service in ecg data char 'notification on' but on_write in function cccd_handle number is difference.

But ... (more)

31
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## Why not control spi nrf_drv_spi_transfer ?

Hello

Nordic Team.

I controling nrf spi.

testing for example nrfSDK14.0.0\example\peripheral\spi\pca10040\blank\arm5_no_packs\spi_pca10040

/**
* Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
*
*
* Redistribution and use in source and binary forms, with or ...
(more)

87
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## Use arduino primo to measure battery voltage level

Hi,

I'm develope some sensor with arduino primo, which use nrf52832 as a primary mcu. I want to measure battery voltage level,and i find some example like: https://devzone.nordicsemi.com/questi...

but i confused with which SDK ... (more)

25
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## S132 5.1.0 excessive RAM usage

From the S132 5.1.0 specification, I expect that its RAM usage should be only 0x1228 bytes plus ATTR_TAB_SIZE. However, when I compile two of the example projects using IAR, I'm seeing an APP_RAM_BASE higher than expected, in ... (more)

19
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## Softdevice wake-up and ble_app_beacon

Hi.

I got the ble_app_beacon example to enter System On low-power mode (and operate in the 1 to 2 microamp range except when broadcasting). And I also got that example to send out a GAP advertisement every 10.24 seconds ... (more)

32
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1
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1

I've added a custom service for transferring data. It shall contain one characteristic that will notify when data is available, and the other should be a long read characteristic (no notify). sd_ble_gatts_characteristic_add is failing (return 0x7) when I add ... (more)

51
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## DFU signature error while updating application

Hi, I can't manage with error in secure bootloder (from secure_dfu_ble_s132_pca10040_debug example) on custom board with nRF52832xxaa chip. I got a signature validation error trying to update aplication.

I created zip files by command: nrfutil pkg generate --hw-version 52 ... (more)

18
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## Include app_config definitions in Makefile

I'm developing firmware for the nRF52832 in eclipse, and since I'm using the NFC pins as GPIOs I need to include the "CONFIG_NFCT_PINS_AS_GPIOS" cflag in my Makefile. However, I don't want to make this change on the ... (more)

53
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## nrf52 development kit programming

Hello nordic dev community,

I am completely new to nordic products. I attended one of the conference and got more information regarding developer zone and info center. I followed tutorials on BLE advertising but all the tutorials are based on ... (more)

17
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## 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)

27
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## Do I need to define an Analog input as such in NRF52?

Hello,

I was wondering whether or not the standard analog pins on the nrf52832 have to be defined as analog inputs with the gpio methods.

I ask this because I am trying to sample some of those pins (NRF_SAADC_INPUT_AIN4,P0 ... (more)

35
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1
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1

This is the Energy Profile that is shown for the nRF82832 and I am wondering about the RX/ switch parts. I assume these RX phases are for receiving scan requests? What happens if I set advertising mode to ADV_DIRECT_IND or ... (more)

47
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Hi. I'm using nRF52832, SDK13.0.0 as peripheral.

I set the values as below to advertise every 400msec.

......

......

30
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## Is it possible to know the channel state information (CSI) from nRF chips?

Hi,

I'm wondering if CSI is available on nRF chips. It can be used for advanced sensing purpose. There have been tons of works on WiFi sensing through CSI. Is it by any chance stored in some registers or ... (more)

20
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## Example for Scan and Advertise at the same time during connection

Hi,

I'm wondering if there is an example for scanning and advertising at the same time during a connection as peripheral? Or is there an example where I can start from? What's the suggestion for intervals and windows ... (more)

26
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## Issues building nRF5 Mesh with CMake

I'm having issues building nRF5 SDK for Mesh v0.10.1-Alpha examples. On an Ubuntu 16.04 VM, I have installed the toolchain per the Debian/Ubuntu instructions and was able to build/run the unit tests (although I ... (more)

24
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2

## How do I add 2nd base UUID for Service and Characteristic?

Hello, i try to get a service with base_uuid1 and to this service a characteristic with the base_uuid2. I am trying to implement BLE MIDI, the BLE_MIDI Specs:

1. BLE Service and Characteristics Definitions The following service and characteristic are defined ...
(more)

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• ### Notify to all connections

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• ### Undefined symbol ble_nus_c_on_ble_evt

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