# 992 questions

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## How can I connect two nRF52840 to transfer large data files?

Hello, Would you have application that can support two nRF52840 pairing and transfer arbitrary large data files?

Thanks, Gerry

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https://devzone.nordicsemi.com/blogs/...

In this blog this is written:

how much is the overhead and where can i look this up?

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## What is the correct way to set device pairable / not pairable?

I'm building something based on ble_app_gls. However, I only want it to be pairable when I say so (user presses a button to put it into that mode). Is there a "correct" way to do this? Should I intercept ... (more)

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## Need solution to reduce the effect of Metal surface on BLE signal.

I would like to know how to dampen the effect of metal surface on BLE signal . Let me give you an instance, i am installing a wireless sensor inside a metal box and this sensor network using nRF52832 sends the ... (more)

39
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2

I would like to hide BLE advertising from normal BLE scanner software. And only be able to see such advertising with dedicated scanner.

I was thinking of changing access address from 0x8E89BED6 to something else which would hopefully cause normal ... (more)

106
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1
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1

## -----------------------------EDIT--------------------------------------

I've changed topic name, because not buffer overwrite is the problem.

I need some mechanism for checking if my data packet can fit into FIFO buffer. If not, it should be just lost. It has to be all ... (more)

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## S332 BLE CONNECT IOS DEVICE

i used SoftDevice s332,and download the example:<InstallFolder>\examples\multiprotocol\ble_ant_app_hrm i find that using android device can connect pca10040 ble well,but use ipad or iphone(lightblue) both can't connect. i want to know how to solve ... (more)

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## gzll + ble example for nrf52

Hi,

I found this example here for nrf51. https://github.com/NordicSemiconducto... And this is more or less what I would need for my application. Is there a way that you make a version for nrf52?

thanks,

Constantin

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## (solved) Bootloader crash (s132 softdevice 2.0.0, DFU-Example)

Hello :) I'm trying to run the DFU example (dfu_dual_bank_ble_s132_pca10040) for the nrf52832 chip on a custom board. The Bootloader crashes/resets at the SOFTDEVICE_HANDLER_INIT(CLOCK_SOURCE,EVT_HANDLER) macro. I adjusted the pin configuration for my board, so what else could ... (more)

26
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3
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## How can I enable gatt_cccd notification automatically?

I've searched for enabling notification, but there are some points that I can't understand.

GATT characteristic attributes and characteristic cccd values are dedicated to GATT_S.

Q1. To Enable my GATT_S characteristic notification, which device is responsible for enabling ... (more)

22
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1
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1

## Add new service base on SDK13 is failed

Hi Sir,

I add NUS service into CSCS project base on nRF5_SDK_13 follow the steps below, there was no error occurred after build the project, but it didn't work. Please correct me if there is anything I missed or ... (more)

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## What is the MIN_CONN_INTERVAL accepted for connection to Android 6+

Hello,

I am using nRF UART v2.0 android app and I have added my custom logic above it. I am using this phone as the central device and nrf52 with sdk 12 as the peripheral device. All my code ... (more)

44
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## nRF5 SDK v13.0.0 ble_app_att_mtu_throughput example

Hi,

what is the default tx_power value in new v13.0.0 SDK in the ble_app_att_mtu_throughput example?

I can't find the use of the sd_ble_gap_tx_power_set() function which was present in the 13.0.0-1.alpha SDK with the default ... (more)

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## sparkfun breakout board - constant current offset

Hi guys,

I bought the sparkfun breakkout board (https://www.sparkfun.com/products/13990). I also have the NRF52 DK from Nordic. I programmed the breakout board via the DK over SWD. And I cut the power LED. My code ... (more)

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Hi, I'm have a question : If i download s120 or s130 softdevice, which SDK version i need to download ? Which version is compatible with my nrf51822xaa ? The reason is when i use some newer SDK , my program can not ... (more)

48
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1
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1

## "device doesn't support UART"

ERROR OCCURS WHEN TESTING UART nus service on a nrf52832 custom board UART APP SHOWS LIKE THIS device doesn't support UART WHEN I TRYING TO CONNECT WITH MY DEVICE. PLZZ HELP

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## Restarted Timer is not executed for long time(S132)

Hey,

SHORT VERSION: Timer (every Second) gets started when connecting (BLE with nRF Connect) to my DK (SDK12.2, Softdevice S132). Timer gets stopped when disconnecting. After reconnecting it takes more than 15Sec for the Timer to call the handler ... (more)

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## HW platforms for BLE Sniffer

Hello,

According to the nRF Sniffer Guide 1.2, the sniffer is supported on a number of platforms (nRF51822/nRF51422 Evaluation Kits and others). All of them (as far as I could see) are marked as 'not recommended' on the ... (more)

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## BLE 4.2 sniffer

I am hoping to get solid verification that nordic offers a solution for sniffing BLE 4.2 packets.

The application I need to sniff is maxing out the MTU (250B payload) so I need support for long packets.

The blogs ... (more)

28
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## how to OTA a ble master ?

Hi, I know how to OTA a ble device, but how do this on a ble master? Is there any nrf tool can OTA a ble master ?

dev environment: SoftDevices:S130 v2.0.1 sdk: nRF5_SDK_12.2.0 ble master ... (more)

95
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2

## Problem with Secure DFU Bootloader on nRF51822_xxAA

Hi,

I have a problem using Secure DFU Bootloader available in SDK 12.1 on nRF51822_xxAA SoC.

Initilaly i was using nRF51 DK board and Secure Bootloader example in SDK 12.1. I fallowed instruction on Nordic InfoCenter. I compiled ... (more)

16
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## NRF HRS peripheral to NRF HRS central

I am trying to get a NRF HRS central (ble_app_hrs_c) to make a connection to a NRF HRS peripheral (ble_app_hrs). However, the peripheral does not show up whenever the central scans for HRS device(s). Meanwhile, the HRS peripheral appears ... (more)

43
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## about detailed description for 9 states of peripheral connection event

dear friends , within a peripheral connection event, 9 states is identified, as it is shown in the pic above(from s132 document). Can i get a detailed description about what work is done during each state ? for example,a detailed ... (more)

63
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## Can I use master control panel with a non offical usb dongle board ?

I have an after market breakout board for nrf51822 with a usb-to-serial chip (cp2102) that I bought from Amazon. It should act as an NRF51 USB dongle (pca10031-like) but with half the price.

I managed to flash the MEFW on ... (more)

124
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## More than 1 packet per CI with S132 V3.0.0

Hello! I am using a nRF52832 device, along with SDK 12.1.0 and S132 v3.0.0. Data is being sent data through BLE and received on an Android phone.

After some tests I noticed that I was not ... (more)

14
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## ble central transmit data to ble peripheral interval?

I download the example of multilink central (S130) into nrf51822 .The central transmit 20 bytes to peripheral interval 50ms sometimes will reset.Anybody know the bluetooth to send and receive the largest interval?

51
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1
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1

## How can I found out my NRF51's device Address? (with Softdevice using Random static address?)

How can I found out my NRF51's device Address? (with Softdevice using Random static address?)

Does Softdevice has any API for fetching my device's BLE Address?

As I Know, default Softdevice address has Random static address, and It ... (more)

97
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1
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1

## In pc-ble-driver: which file you need to edit to add some custom logic

I have successfully manged to achieve serial communication between my PC (Windows) and nRF52 board by using the pc-ble-library and the pc-ble-library-js .

I can run without problems, npm test or node examples/heart_rate_monitor.js.

Let's say I want to ... (more)

64
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## How to get Bluetooth mac address of connected device?

I have tried extracting Bluetooth address of connected device by using "ble_gap_addr_t" , by this i am able to get some address but that address is being changed after re-connection,why is it? I am using nRF51 DK.

19
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1
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1

Hey,

I`m experimenting with the blinky ble example in SDK 12. Everything works fine with the Android nRF Blinky app. But I noticed a weird behavior when using nRF Connect. When using nRF Connect and connecting to the nRF52 ... (more)

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• ### How can I connect two nRF52840 to transfer large data files?

Posted 2017-03-30 22:51:20 by Gerry
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