# 491 questions

Tagged
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20
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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)

24
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1
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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)

44
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## Recommend me reverse voltage protection component.

Hello Sir, I am designing PCB using nRF52832 SoC it is very small and operated on AA battery source. So please recommend me for reverse battery voltage protection diode or MOSFET. I am confuse which components is best and not ... (more)

17
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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)

31
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1

## nRF52832 lost bond but Android phone did not

Hi. I am connecting to and establishing a bond between my Android phone and the nRF52832 board using the s132 SoftDevice. I'm in a situation where the Android phone has a bond for the board, but the board does ... (more)

41
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1
vote
1

## UART switching in nRF52832

Hello,

We plan to switch between two sets of UART pins for factory testing. One set will talk to an IC in our design and the other to a USB port through FTDI. Since simultaneous communication is not needed we ... (more)

39
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## Problem with Wi-Fi communication and BLE communication?

Hi,

I am trying to send data to server using ESP8266 WiFi module interface with nRF52832 DK board via UART interface. My problem is when i sent AT command to ESP8266 it get respond but i want to set SSID ... (more)

31
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1
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no

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)

26
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1

## Error invalid parameter on charateristic add

Hello !

I'm struggling with my Bluetooth configuration on the NRF52832. I'm running with the latest SDK (14) and the S132 SoftDevice.

When I'm trying to add a characteristic to my service, I'm getting an error 7 ... (more)

20
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## Start advertising after connection's hard fault

Hello all:

I have faced a problem that my device will report hard fault when I try to start advertising after force disconnect the device.

My EV board is nRF52832 and develop with SDK12.2.First I connect device with ... (more)

42
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1

## How to print the RSSI values after successful connection?

Hello All,

I am working with the HRS example. Currently I have one central device and one peripheral device is there.

From central code I want to print the updated RSSI values continuously . For that I added the below code ... (more)

31
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1

## When does sd_ble_gatts_characteristic_add() return NRF_ERROR_NO_MEM?

Hello,

I would like to understand the reason behind getting a error,(0x04) NRF_ERROR_NO_MEM, when calling the function

sd_ble_gatts_characteristic_add(p_service->service_handle,&char_md,&attr_char_value, &p_service->bsl_handles);


As far as I knew, the softdevice checks the memory available while calling to softdevice_enable_get_default_config ... (more)

47
views
1
vote
1

## Peer Manager Init returns NRF_ERROR_STORAGE_FULL at boot time, why? [closed]

Hello,

I am using nrf52832 pca10040 with softdevice v3 of SDK v12.2, when booting my device tries to initialize the peer manager with pm_init() and this function is returning error code 0x3.

I have traced it a bit and ... (more)

56
views
3
1

## BLE Mesh Time Synchronization

My goal is to synchronize the clocks of several nodes in a mesh network. I would like the client node to distribute the current time to all the server nodes in the network. Would broadcasting a time-stamp from the client ... (more)

36
views
1
vote
1

## How to back up common source libraries

Every time I change a common source file within Kiel, the source file is changed for every project because (obviously) is a file common to all example projects.

Is there a way, without manually copying over the libraries and change ... (more)

37
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1

## Rain gauge and nrf52(pca10040)

Hi developer, I'm a beginner using Nordic. This happens because I assigned made connection rain gauge and nrf52 as custom programming using a rain gauge and nrf52. Can someone show some example code connect to rain gauge?

19
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## How to whitelist the peripheral devices from central?

Hello All,

I am using the HRS example as reference from Nordic SDK14.1. I have one central and 4 peripheral devices.

I have the MAC ID's for all the four peripherals. Now, my question how can I add ... (more)

61
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1

## Why is my service cccd_handle number difference.

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)

50
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## Why is my service cccd_handle number wrong

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)

275
views
2
1

## error during buildinf DFU_debug application, SDK12,segger embedded studio

Building ‘secure_dfu_secure_dfu_ble_s132_pca10040_debug’ from solution ‘secure_dfu_secure_dfu_ble_s132_pca10040_debug’ in configuration ‘nrf52832_xxaa_s132’
Output/nrf52832_xxaa_s132/Exe/secure_dfu_secure_dfu_ble_s132_pca10040_debug.elf section .bootloaderSettings' will not fit in region UNPLACED_SECTIONS'
region UNPLACED_SECTIONS' overflowed by 4096 bytes
Output/secure_dfu_secure_dfu_ble_s132_pca10040_debug nrf52832_xxaa_s132/Obj/nrf_dfu_transport.o: In function nrf_dfu_transports_init':
undefined ...
(more)

47
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3
2

## Wake up from sleep mode using hardware interrupt

Hello All,

I am working on nRF52-DK, nRF52832 PCA10040, and i want to know on how i can wake up my device from sleep mode using hardware interrupt. I am using interrupt from a PIR sensor.

Regards.

46
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1

## HCSR04 with nRF52 (PCA10040)

Hi developer, sorry to interrupt and ask. How to use an ultrasonic sensor with nRF52? Since I search a code for nRF52 are not exist and see ultrasonic sensor can connect with nRF51. Hope that is some solution to use ... (more)

31
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1

## nRF_Libraries not a component class

I'm following the tutorial for how to use SEGGER_RTT_printf() function.

The screen shot shows the nRF_Libraries as a software component class (green icon)

However, nRF_Libraries in my IDE is a group (a folder icon)

The problem is that in ... (more)

33
views
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1

## What have changed on multiprotocol/ble_app_gzll example between SDK14.0 and SDK14.2?

Hello, I use the pca10040 and the problem is in 14.0 eaxmple,when I push the button switch the protocol mode like : ble->gzll->ble and then I find the example loop into this function:

static void expired_timers_handler(uint32_t ...
(more)

26
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## How to change the peripheral depends on battery level?

Hello All,

We have One central device and four peripheral devices. From every peripheral device we are transmitting battery level.

I want to change the peripheral or want to connect to other peripheral when the battery level of connected peripheral ... (more)

29
views
no
1

## How can i handling [Service]_on_ble_evt?

Hello.

The development environment is as follows :

       OS : Windows 7 Pro 64bit
IDE : Keil uVision V5.24.1
Python : 2.7
SDK Version : nRF5_SDK_14.0.0
DK : PCA10040 2EA


I have 1 question.

I added the Bluetooth service and the ... (more)

32
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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)

37
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no
1

## nRF52832 doesn't start after exec. nrfjprog-script-file but after the first connection to nRFGo Studio

Environment

nRF52832, nRF5x-Command-Line-Tools_9_7_1_Linux-x86_64,

Problem:

Programming of Softdevice, Application and Bootloader with nRFGo Studio works.

Programming of the same *.hex files with a scipt - file like:

nrfjprog -f NRF52 --eraseall

nrfjprog -f NRF52 --program softdevice.hex --verify

nrfjprog -f NRF52 --program ... (more)

74
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no
1

## Recommend Wi-Fi SoC with Very Low power Consumption?

Hello Sir,

I have developed my application using nRF52832 chip with BLE connectivity. My device is battery operated and hence i am looking for WiFi chip with small size and very low power consumption also low cost. Is it have ... (more)

29
views
no
1

## NRF52DK antenna pattern orientation has nulls to side?

Since the antenna on the NRF52DK is oriented horizontally, and the theoretical 3D antenna pattern is a torus (donut) whose hole is pointed in the horizontal axis of the strip antenna, does the NRF52DK have nulls (weak signal strength areas ... (more)

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