# 1,959 questions

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## AirFuel SDK 2.2.0 IROM and IRAM settings

I download "nRF5_AirFuel_SDK_2.2.0_7b89a57" and use "ptu_app_beacon" development, I am currently using "nrf51822-QFAA" and "nrf51822-QFAC", how do I set up IROM and IRAM?

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## nRF52 Development Kit Programming

How to setup a nRFDK52 as a central and nRF bluetooth kit as peripheral. Should I use nRF go studio? Do i need to load the soft device first before loading the app? What is the baud rate for communication ... (more)

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## Connection event position in time

Dear Nordicers,

I have an application where node based on s132 sofddevice 4.0.2 has multiple connections as a peripheral and as a central. The case is about non overlapping central and peripheral connection events. I can make all ... (more)

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## nRF52 DK - 20ms non connectable advertising interval

Hello, im experimenting around with the nRF52 DK (and nRF51 DK also)

Now I have following setup on nRF52 DK:

SoftDevice: s132 nRF52 v2.0.1

Applicatoin: Example Project from nRF SDK 11.0 (ble_app_beacon)

By the default the interval ... (more)

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## Best place to get started

Hello everyone.

I've got the nRF51822 Evaluation Kit and Dongle. The heartbeat demo is working, so I got the toolchain -- Nordic, Keil, Segger under Win7 -- set up correctly, as far as I can tell.

I need to interface with ... (more)

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## DK-52 Matching to external Dipole

Hi,

We are range testing BLE using the DK-52 with an external dipole antenna connected via the u.fl connector. We are using the DK-52 + packet sniffer software on a laptop to observe RSSI as we move a nRF51822 smart ... (more)

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## Disconnections between iOS 8-10 and RedBear BLE Nano V1.5

We're having troubles with BLE connection between iOS 8-10 devices (iPad Pro, iPad Air 2, iPad Mini 3, iPhone 7, iPhone 6) and RedBear BLE Nano V1.5 32KB boards (with Nordic nRF51822 SoC on board).

The devices connect ... (more)

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## Send out ADV packet in <100ms after power on the chip

I have download latest S130 SDK. And I try to send ADV in 100ms. Now it takes >= 250 ms. I use the scope and find SOFTDEVICE_HANDLER_INIT takes 248ms on PCA10028 board.

The softdevice I used is from: https://www.nordicsemi ... (more)

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## nRF52832 / nRF52840

Do you have a comparison table between nRF52832 and nRF52840?

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## RX on LE Coded PHY

Hi,

I noticed weird behaviour on nRF52840 when using LE Coded PHY.

Connection access address is configured as logical address 1 and it works fine when using 1M and 2M PHYs. As soon as I switch to Coded PHY the ... (more)

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## HowTo use S132 to for uart to Windows 10

I am currently using a CSR 4.0 dongle 8510 A10 chip on Windows 10 Creators update

I can get it to Pair with the nRF52832 in windows, according to windows.

I have a "Standard Serial over Bluetooth link (COM3 ... (more)

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## Timer not going off for 7-50 seconds

Hi,

We're working on the connection params negotiation. Therefore we need a timer to go off 2 seconds after connecting to send a conn params change request.

Most of the times this works as expected. We toggle some pins ... (more)

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## current consumption of nRF52832

Hi, I am testing the current comsumption of nRF52832 using the original code of "nRF5_SDK_13.0.0_04a0bfd\examples\ble_peripheral\ble_app_beacon ". The peak TX current I measured was about 12.5mA. It doesn't match the results in https://devzone.nordicsemi ... (more)

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## nRF51822 for real time BLE packet capturing

Hello, I would like to know if I can use nRF51822 chip to get partial BLE packet information like Access Address, PDU before the whole packet has arrived.

If yes how and if any other simple method exists that would ... (more)

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## Best way to locate a buttonless device in DFU mode

I'm using the experimental buttonless DFU app in SDK v13 to automatically change a device without buttons to run in DFU mode for an update.

I'd like to automatically reconnect o the device after the mode switch in ... (more)

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## I2C: How can I read and write data from my VL6180X sensor through nrf51 kit under nrf_drv_twi_tx() and rx() functions?

The default I2C address of my sensor is 0x29 (7-bit). If the least significant bit is low (0x52) the message is a master write to the slave. If the lsb is set (0x53) then the message is a master read ... (more)

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## nrf51822 DFU procedure nrf toolbox not working ?

Hello,

I am using nrftoolbox code available here:https://github.com/NordicSemiconductor/IOS-nRF-Toolbox to perform the DFU procedure.

I have taken the firmware zip file.

I have integrated the iOSDFULibrary in my ios application using POD. Currently I have manually ... (more)

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## nrf52840 Bluetooth and 802.15.4

Hi,

May I know if the nrf52840 supports running Bluetooth 4/5 and 802.15.4 on the same radio simultaneously?.

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## Want to send the start command to the BLE device iOS

I have BP device, It has start button. When we click the start button then it start monitoring the BP. Need to start/stop the device to monitoring the BP from the iOS App. Is there any way to achieve that?

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## BLE privacy: Should address change after disconnection happens?

My BLE peripheral is an advertising entity using BLE Privacy. The advertising address(RPA) is changing every in 15 minutes. But, when a connection is stopped and it resumes advertising, the address is not changing.

Should the address change when ... (more)

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## Keeping track of advertising status

Hello Nordic!

This question is a follow-up on this topic, where it is suggested to keep track of BLE_GAP_EVT_CONNECTED and BLE_GAP_EVT_TIMEOUT events in order to know when a peripheral device has stopped advertising.

My first though was to use the ... (more)

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## Issue in getting serial number of BLE device iOS

I am working on a project in which i have to get the readings from device (BLE device). I have two devices BP and BG. I can successfully get the data from the devices using your library.

I was trying ... (more)

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## question related to uicr [closed]

Hi, i am newbie to nrf51822 and want to know details of following stuffs:

1)what is use of uicr?

2)if i place some value in uicr and then change the image,then is there will be change in ... (more)

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## Bluetooth write problem

I started with the blu_app_template on a 52840. I have advertising working. I can see that from an iOS app. I can also see the details of the service. I see the characteristic on the iOS side. I am having ... (more)

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## stuck on sd_flash_write in with fstorage and fds libraries

Hi,

I tried to use fstorage to store some data in flash. From now, I was able to read and write data before advertising starts, but when I try to write data to flash after the ble_advertising_start(BLE_ADV_MODE_FAST) function, my ... (more)

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## How to define a variable whose value survives a reset? [closed]

I want to define a variable whose value can survives a reset. Is it possible?

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## How can I see the NFR_LOG_INFO [closed]

Hello to everyone in this community,

I am new with NordicSemi chips and I have the Development kit 52832. I opened the example folder from the SDK 13, SPI slave and i saw some code using NRF_LOG_INFO in order to ... (more)

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## NRF52 power consuption when receiving data

Is there any data about power consumption of NRF52 when it is receving data from other device ?

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In the data sheet of the NRF51 and 52 there is mention that sensitivity of NRF51 is -96 dBm and NRF52 -98.

But I read some where that when RSSI is -90 then that signal is unusable so what does ... (more)

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## using a cocoapod that is in a library that is in an app?

I am trying to use your swift iOSDFULibrary cocoapod. What I am doing is the following. I have a library written in swift. That library is where I have your iOSDFULibrary. I have a class object that imports your iOSDFULibrary ... (more)

#### Statistics

• Total users: 19674
• Latest user: Kenneth Lahey
• Resolved questions: 9408
• Total questions: 22333

## Recent blog posts

• ### The complete tutorial for developing and debugging nRF52 applications on a Mac

Posted 2017-05-11 04:13:06 by Mohammad Afaneh
• ### Bluetooth 5 2Mbps Demo with nRF52 Series and Samsung Galaxy S8

Posted 2017-05-09 14:20:22 by John Leonard
• ### Setting up Segger on a mac or pc and debug - step by step for humans

Posted 2017-05-05 14:03:35 by Lola

Posted 2017-04-11 11:49:17 by Radosław Koppel
• ### Taking a deeper dive into Bluetooth 5

Posted 2017-04-07 14:53:51 by John Leonard

## Recent questions

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Posted 2017-05-24 05:48:46 by sara
• ### How to expand the flash memory address?

Posted 2017-05-24 04:51:42 by tovax
• ### code of protocol stack which part of the Protocol I can modify?

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