# 924 questions

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• x
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## Problems with BLE Mesh Example

Good day, I tried the BLE Mesh Example located: https://devzone.nordicsemi.com/blogs/...

... and for some reason it is not working for me. I posted a comment where the example is posted, but I have not heard back after ... (more)

37
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## Windows BLE Compatibilty

I made a BLE peripheral (nRF52 + SDK11.0.0 + s132) and have so far been using Android devices (that supports 7.5ms connection events) to connect to it. I want to connect to a PC now and support various Windows ... (more)

19
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1
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## Reject when whitelist empty

Is there a way to reject requests when the whitelist is empty? I support clearing out the whitelist, but after clearing out the whitelist I would still like to reject connection requests. Is there a way I can do this ... (more)

51
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1

## daisy-chain mesh for 6lowpan over ble using nRF52840

Hello,

I really like the new nRF52840, especially it's Bluetooth 5 capabilities. The thing is that i cannot figure out if i would be able to make nRF52840 based devices to communicate (6lowpan over ble) one with each other ... (more)

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## sd_flash_write inside BLE event [closed]

Hello, i have read if not all posts about writing to FLASH while using BLE. But could not find the desirable method.

What i would like to do is to write to flash from characteristic write as it comes. The ... (more)

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## Write to FLASH inside BLE event

Hello, i have read if not all posts about writing to FLASH while using BLE. But could not find the desirable method.

What i would like to do is to write to flash from characteristic write as it comes. The ... (more)

15
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## sd_flash_write in BLE event [closed]

Hello, i have read all posts about writing to FLASH when using BLE. But could not find the desirable method.

What i would like to do is to write to flash from characteristic write as it comes. The problem: sd_flash_write ... (more)

53
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## IPv6 over BLE packets struck and question

hello everyone:

I work IPv6 over BLE example on both Raspberry pi ,this pic is 6LN (CoAP Server)sending IPv6 over BLE packets to 6LBR(CoAP client) and I use tcpdump to sniffer coap port on 6LN。In this BLE ... (more)

46
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## sd_ble_gatts_hvx() failed: 0x8

Trying the ATT_MTU Thourughput Example with SoftDevice:

nRF5_SDK_13.0.0-1.alpha_055eef3/components/softdevice/s140/hex/s140_nrf52840_5.0.0-1.alpha_softdevice.hex

on two nRF52840 devices, when I get to the 6th step of sending '1' to the tester I get this ... (more)

23
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## BLE HR C Example - Repeated BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION

Hi,

I am attempting to run the examples of BLE HRS C and BLE HRS Peripherals from the SDK. Getting to the connected state works (discovery and notifications as well) just fine. But the two seem to always disconnect after ... (more)

38
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1
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1

## BLE Nano: Which pins are capable of PWM

I am developing on a BLE Nano 1.5 and need to use PWM to make a beeping sound from a piezo buzzer. I am wondering which pins are capable of PWM. Here is the pinout diagram:

90
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## How can I change the peripheral type? Don't need "Keyboard"

Hey guys, I work with a partner who makes the hardware for me and uses the nordic chips. I want my device to pair over the android and iOS system settings.

image description

This works fine, but my hardware seller ... (more)

42
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1
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1

## Eclipse Managed Make Project for nRF52

I'm using nRF52 + SDK11.0.0 + s132 and following this tutorial and this blog to make a Managed Make project using the ble_hrs esample.

As I was going through the directory structure, I noticed that ble_app_hrs_gcc_nrf52.ld in the ... (more)

40
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## Bluetooth + long timeslot

Hi,

I want to use Timeslot API in order to gain uninterruptible period of time (1 second~) along with running Softdevice - just single one, not periodical.

I've changed connection parameters to include longer connection supervision timeout and slave latency ... (more)

32
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## What might cause HardFault on sd_nvic_critical_region_enter

I have an nrf51822AC chip connected to another ARM based processor which provides a CAN interface. The two are connected via the UART and we are using the ble_connectivity software in connection with the S120 softdevice on the nrf51.

So ... (more)

59
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1
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1

## iOS/iPhone BLE service discovery timeout with ant shared channel demo

Hi!

Using the out of the box ANT shared channel demo with a NRF52-DK board and the iOS demo app everything compiles and installs nicely, using the Android-based app nRF Connect for Mobile I can successfully connect and control the ... (more)

72
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2
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## NRF sniffer UART baud rate

Hi, I'm trying to use an MDBT40 based board as a sniffer using the NRF sniffer firmware. I'm guessing I just need UART -> USB to talk to the chip, so I've hooked it up to an Arduino ... (more)

53
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## power consumption nrf52

Hi,

I am trying to figure out the best way to save power on the nrf52. I need to connect with ble about two times per day. The ble should 'woken up' by an accelerator (probably ADXL362), connect, send a ... (more)

49
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1
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1

## nrfutil dfu ble fail [closed]

Hi, Nordic

When I use nrfutil dfu ble, it shows:

  File "D:\Program Files\Python27\lib\site-packages\nordicsemi\dfu\dfu_transport_ble.py", line 226, in open
File "D:\Program Files\Python27\lib\site-packages\nordicsemi\dfu\dfu_transport_ble.py", line ...
(more)

50
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1

## unresolved inclusions in Eclipse

I'm using nRF52 + SDK11.0.0 + s132. I'm following this tutorial. I am able to build from the command line and from Eclipse just successfully. However, Eclipse is unable to properly decode the include paths. It is properly ... (more)

36
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## How can I update my passkey using sd_ble_opt_set() on runtime

Hello everyone, I successfully implemented the static key to access a characteristic now I want the user to udpate the passkey through another characteristic (which is also protected).

I successfully read the value of the passkey entered by the user ... (more)

34
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1

Hi,

I'm trespassing some code of nRF51 to nRF52 (s132, SDK 12.2.0) and I get an error when I try to call sd_ble_gatts_rw_authorize_reply. This is the code

case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST:
if ( p_ble_evt->evt.gatts_evt.params.authorize_request.type == BLE_GATTS_AUTHORIZE_TYPE_READ ...
(more)

43
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1

## Central role with high Bandwidth problem

Hi,

I am using a custom board with a nrf51422, SDK11, S130 v2.0.1 with central role.

I have made changes on the code to change from MID bandwidth to High. I added the following code to the ble_stack_init ... (more)

20
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## Temporarily Disable Bonding

Hello,

Is there a way to temporarily disable bonding and just allow any connection? I want to generally use bonding, but there are certain corner cases where I need to allow just any device to connect.

70
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2

## Need help with writing to Charateristics to turn motor on and off

I have a 32u4 Feather but don't get the right support from Adafruit to create my own Profile. I have downloaded Nordic's android app and can see all the characteristics on the board. But I have no clue ... (more)

102
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1
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1

## NRF52 Sleep Mode and BLE Advertising MBED

Hi all,

first of all I'm new to NRF and BLE applications so I'm truly sorry if some of my questions are very basic and if answer to some of them is already posted somewhere. I probably should ... (more)

50
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2

## Current consumption on different BLE configurations.

Hi,

I have my 2 nRF51 running with S130 v2.0.1, one is the central and the other peripheral. I am transmitting audio data between both and want to reduce the current consumption to the maximum of my ability ... (more)

32
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1
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1

## Master Emulator - DiscoverDevices() vs StartDeviceDiscovery()

What is the difference between DiscoverDevices() and StartDeviceDiscovery()?

168
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2
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## BT SIG - using nrF52832 with S132 v3.0.0 - how should we determine we need qualification certification or just declaration and listing

We are using nrF52 series in combination with v3.0.0 of the S132 SoftDevice stack. And I want to understand if we have to go through any of the qualification certification phase even if we refer its end product ... (more)

106
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1
vote
2

## Why use BLE without GATT?

I've come across a couple of products that shows up as both classic and BLE. But when connecting to these products via nRF Connect or inspecting the traffic, I can't seem to find any GATT services. One example ... (more)

#### Statistics

• Total users: 16311
• Latest user: tristanubnt
• Resolved questions: 8512
• Total questions: 19842

## Recent blog posts

• ### nRF52840 long range demo

Posted 2017-02-14 12:46:03 by Ole Bauck
• ### Setup and Running the OpenMesh DFU on the nRF52 DK v2.0

Posted 2017-02-06 22:33:25 by martindavidb
• ### New NFC feature on nRF52 Series: Read/write capable Type 4 Tag NFC library in nRF5 SDK.

Posted 2017-02-02 10:31:31 by Pär H
• ### Simple Application-level Authentication

Posted 2017-01-30 12:34:01 by Daniel Veilleux
• ### WIZnet's BLE to TCP Gateway

Posted 2017-02-01 01:12:03 by Mason Lee

## Recent questions

• ### nrf connect indicate subscribe

Posted 2017-02-20 03:43:55 by Jackson
• ### Buttonless DFU - Transfer Succeeds, but no BLE device available after

Posted 2017-02-20 02:53:04 by TFETT
• ### can i program nrf51822 bt module using uart

Posted 2017-02-19 12:15:29 by phob
• ### Radio can not work inside timeslot handler

Posted 2017-02-19 11:48:10 by JiachengWang
• ### nRF52840 USB power ???

Posted 2017-02-19 11:20:18 by Roger Clark