# 2,917 questions

8
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## Real UART TX transmit depth?

I was wondering if anyone has done any extremely high speed UART work on the nRF51 (or the non-EasyDMA module on the nRF52). I need to improve performance for an existing prototype that has to stream a large amount of ... (more)

8
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## app_timer_freertos.c/app_timer_stop bug?

nRF5_SDK_12.2.0. app_timer_freertos.c app_timer_stop() call xTimerStop/xTimerStopFromISR with timer_id parameter. It seem to must use hTimer parameter.

It's bug?

99
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## Are there any particular practices or instructions should i follow if I want to write a custom library

Are there any particular practices or instructions should i follow if I want to write a custom library

We are trying to write a library for LEACH protocol and it is a network algorithm and we can't find an ... (more)

6
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## fstorage in chosen area

Hello, I'd like to store a large amount of data in flash and in a chosen area. As a start, I've chosen the area starting from 0x77000 and ending at 0x78000 Iv'e written this

const tGlobalData romData ...
(more)

9
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## my remote 3 of the nrf52's kits doesn't appair on bluetooth with windows or ubuntu?

hello I am on 2 projects the nrf51 and the nrf52 , but I met some problems about the bluetooth on ubuntu and windows . Can you help me please ?

6
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## get app timer current count

Hi,

i set the app_timer to fire every 60 seconds app_timer_start(m_Timer_id, APP_TIMER_TICKS(60000, APP_TIMER_PRESCALER), NULL);

Is it possible to get the current couter,for example, after 30 seconds?

I need to have an RTC counter discretized to milli seconds ... (more)

14
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## Android device as IPv6 BLe Server sending UDP packages

Hi,

i'm currently try to figure out how to use an Android device as an IPv6 Server through BLe sending UDP packages. One of my collegues tried this example as it was discribed with an Rasberry Pi as edge-server ... (more)

14
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## PPK won't output over 2.2V on nRF52832 Preview DK

Hi, No matter what I adjust, I can't get the PPK to output over 2.2V. I happen to be using an older nRF52 preview DK (figured it'd be a good use for that board now that it ... (more)

30
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Hi,

I use the SDK12.3 and SD130 with secure_bootloader and my own application. I can flash SD and Bootloader and update my app over OTA with DFU from NRF Toolbox. My app works fine after updating. I implemented the ... (more)

22
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## Disable NFC Interrupt

Hi,

The NFC function is set to read only in my application. I don't want to wake up my system when someone tap on my device to read the NFC data. (assume this method can save more power)

Should ... (more)

20
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## Certification of a PCB with different pin-to-pin nRF52 chips

Hello! We use chip nrf52832(QFN-48) in our project and we wont to pass the PCB certification. But we also want to use chip nrf52810(QFN-48) in another project, but with a PCB from the first project. Should we again ... (more)

29
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## I am running MCP9808 on NRF52 EVB, i have this following program which is not giving the correct values on terminal display

I have this program running on KEIL 5, what could be the problem with the code and Do you guys have any sample code for mcp9808? Note- I am using the wired connection not a Bluetooth app to sense the ... (more)

23
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## how to achieve telec certification

how to achieve telec certification

17
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## connection without nrf toolbox

Hi, all.

I test using ble_app_uart in example folder.

Test result, I can't connect without nRF toolbox .

How can I connect without nRF toolbox?

41
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## CoAP IOT Cloud Example Server Requests

I have set up the Cloud Coap example in the Iot SDK using a nrf52 Dk. I have been successful in sending a serialized byte array from the nordic to my cloud server. I need to be able to communicate ... (more)

24
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## nRF52832_QFAA problem with NFC pins

Hello!

We designed and manufactured board with nRF52832_QFAA. The NFC pins was configured as IO and connected to sensors. The problem is that we see that those pins get 3.3V with power-up of Nordic. We tried to make different ... (more)

18
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## [FDS] Unable to free storage (garbage collector doesn't work)

No matter flash is full or not, calling fds_file_delete() and fds_gc() does not free storage. We checked the content in flash are not 0xFF. Moreover, after this issue, always fail to create files or records.

16
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## lfclk, rtc issue on SDK13

I am trying to set up RTC2 by following an example https://github.com/NordicSemiconducto... I ported it to my project which is running a softdevice on nRF52. It works perfectly fine on SDK11 but has problems on SDK13.0 ... (more)

64
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## NRF52832 - Monopole Antenna on 24mm Dia PCB

Hi,

I need to design a small nRF52 board On 24mm Dia 2-layer PCB, same like nRF51822 Bluetooth Smart Beacon Kit (nRF51822 Coin-Cell design). Please find the attached Schematics and layout files for your reference.

For mono-pole antenna,Layout Reference ... (more)

28
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1
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## Best way to update a 32-bit word in flash - SDK13.1

Hi,

I want to store the CRC of the current firmware in the flash, for DFU purposes. Almost all of the threads I've seen so far reference the pstorage API but it's no longer supported since SDK12. There ... (more)

34
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## The advertising interval changing to 2000ms?

Hi! Im trying to figure out the power consumption of two types of beacons that uses nRF51 and nRF52. I have connected a small resistor in between the supply and measuring the voltage drop. In the beginning I observed that ... (more)

22
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## Delete bonding/Whitelist clear

Hi All,

i need some helps. I need a device that can connect with one phone only, so i have created a whitelist wih size of 1.

During the life of device the device can be delete the bonding information ... (more)

79
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## nRF Toolbox couldn't do OTA using Bluetooth 5

Hi

We are using the nRF52840 and the application is OK now. Then I do the OTA using a Android phone which supports Bluetooth 5 and it's made in our country. I use the nRF Connect to connect the ... (more)

19
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## SAADC with 8 channels do not map correctly on PCA10040

I am trying to measure the ADC on all 8 ADC pins of the nRF52 on the PCA10040. I'm noticing quite large amount on noise on floating lines (up to 0.6V). However my biggest issue is how the ... (more)

29
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## Cannot receive UART on ble_app_uart with nRF52382

I am running the ble_app_uart example in SDK 13.0 with nRF52382.

• First issue

The app can receive data via UART only when I use "Termite" as a terminal emulator. If I use "TeraTerm", "Putty" and "RealTerm" to send data ... (more)

21
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## Unable to perform secure serial DFU with nrf52 DK

Hi, I'm having trouble performing a secure serial DFU with the nrf52 DK, I'm using the following components :

• SDK 13.0.0 : experimental_bootloader_secure_serial example
• softdevice v4.0.2
• nrfutil v3.2.0(standalone exe)

I've disabled flowcontrol ... (more)

27
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## "No source available" error after changing RAM start address

I've looked around and found similar questions, but nothing has really led me to an answer.

I'm working with the NR51 devkit, Eclipse, and SDK 12.3.0. I'm working on a system that should be able ... (more)

49
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## NRF_log output to nRF Connect

Is it possible to have nrf_log print to the log in nRF Connect? (Or to Eclipse/RTT Client while not in debug mode)

If this question is answered somewhere else and I didn't see it, feel free to point ... (more)

104
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## ANCS problem

I have some question about ANCS ,when we trun off the IPhone and turn on the IPHONE. The notifcation is disabled. I have to turn OFF the bluetooth and ON bluetooth form ISO setting. Then ANCS notifcation is working again ... (more)

29
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## NRF52: Is it possible to make NFC to Tx continuously ?

Hi,

We would like to pass radio certifications and our lab is asking for different tests modes (TX/RX continuous, waves etc ...) regarding BLE and NFC. Regarding BLE, we don't have any problems thanks to radio_test provided by Nordic ... (more)

#### Statistics

• Total users: 23023
• Latest user: Numbers Arnott
• Resolved questions: 9857
• Total questions: 23725

## Recent blog posts

• ### Introducing nRF5 SDK for Mesh

Posted 2017-07-20 09:42:44 by Pär H

Posted 2017-07-19 06:53:42 by Mohammad Afaneh
• ### Unique Thread/Bluetooth multiprotocol solution with nRF5 SDK for Thread and nRF52840 SoC by Nordic

Posted 2017-07-14 10:31:56 by Krzysztof Loska
• ### nRF Connect macros (currently Android only)

Posted 2017-07-14 13:29:14 by Aleksander Nowakowski
• ### Power Optimization — From 3 to 7 Months on a Single Charge

Posted 2017-07-10 14:34:39 by Yaniv Nis

## Recent questions

• ### Real UART TX transmit depth?

Posted 2017-07-22 01:21:21 by samsonc