# 195 questions

Tagged
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404
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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)

53
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1
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1

## Is it possible to know whether advertising packet is connectable or non connectable in Android?

Hi,

Is it possible to know which type of advertising packet is being advertised by the slave i.e whether it is a connectable or a non connectable advertising packet by the master device?

710
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## Device name too short?

When trying out the ble_app_hrs_freertos example in nRF5 SDK 11.0.0-2.alpha_bc3f6a0, I seem to only get 14-character long device name announcements.

This happens when using components/softdevice/s132/hex/s132_nrf52_2.0.0-7.alpha_softdevice.hex.

57
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1
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1

## Advertising Bluetooth LE 128-bit vendor specific UUID

I am wondering what is the logic and magic behind using sdk API's to advertise vendor specific 128-bit service UUIDs. In the "Nordic UART Service" example (nus, SDK12.2.0) there is:

static ble_uuid_t                       m_adv_uuids[] = {{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};  /**< Universally unique ...
(more)

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## Sometimes the android app(especially vivo phone)can not scan the device

The vivo phone sometimes cannot scan the device, There are two devices embedded same program. However,one of them can be scanned,the other one can not. The advertising packet shows as follows:

I can not find the wide difference ... (more)

53
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1
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Hello, I am using an nrf51822 but have no success in advertising. I tried so far to load the ble_app_template from the peripheral examples where I' ve only changed

 #define APP_ADV_INTERVAL                10


I tried to load another ... (more)

61
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Hi,

Similar questions have already been posted but they don't seem to fit to my problem...

Basically I want to advertise 3 primary services, starting from the 'experimental_ble_app_blinky' example: the already provided lbs service and two new ones. For ... (more)

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## Is the advertising module removed from docs?

I am programming a beacon, first I had some problems using sd_ble_gap_adv_start() so I changed to ble_advertising_start().

Now I have a problem when compiling:

_build/nrf52832_xxaa_main.c.o: In function advertising_start':
/Users/.../pca10040/s132/armgcc/../../../main.c:388: undefined reference ...
(more)

41
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1
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2

## Concurrent peripheral and advertising s110

Our nRF51822, S110 device uses concurrent advertising (iBeacons) when connected to the central. Our customer would like to have a variable tx power on the advertising packets only. Is there any way we could do this?

99
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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)

70
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no
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## nrf51822 advertising packet not detected

Hi,

I would like to ask your support for a very unusual problem that I'm facing with a project based on nrf51822.

The board under test is based on nrf51822, SDK12.1, softdevice S130. The nordic example used for ... (more)

53
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1
vote
1

## eddystone different advertising interval for each slot

Hi!

I am working with experimental_ble_app_eddystone in SDK 12.2.0 for nRF52. I have seen that the firmware does not support using different advertising inteval for each slot of advertised packets.

Is it right or am I misunderstanding something ... (more)

161
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1
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2

Simple question:

• I successfully use ble_advertising_init () with adv_data, scan_data and adv_opts.
• I include manufacturer data via scan_data.p_manuf_specific_data = &manuf_data. This also works well

Now I want to change my advertising packet by dynamically altering one byte only in my manuf_data ... (more)

180
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1
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1

## Advertise on one channel at a time - app_timer problem

Hi DevZone

I want to make a little beacon app, that advertises on channel 37 then waits 700 ms, advertises on channel 38, waits 700 and advertises on channel 39. The below is what i have implemented, yet it doesn ... (more)

101
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2
2

Hello, I've been trying to get directed advertising and auto-connection working on an NRF51822 peripheral.

I'm using SDK V11.0 with SD130 v2.0.1

This is the scenario I'd like to get working:

• Start normal (fast ...
(more)

79
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1
vote
1

## What are nRF52 advertisements exactly good for and what UUID do I have to put?

Hi!

So I managed to create my custom service with one characteristic (a struct with several attribs). I can see it in my app and everything's awesome. Yay.

But in some tutorial and in the sample app I altered ... (more)

477
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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)

71
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1
vote
1

## ble_peripheral/ble_app_beacon modification, error 0x12

Using Segger Embedded Studio 310i in Linux and SDK12.2.0, I imported the Beacon example project (ble_peripheral/ble_app_beacon) from Keil. Right now I'm trying to make it advertise rather than act as a beacon. I removed what I ... (more)

86
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1

## Disconnect from Peripheral and stop Advertising

Hello ,

I'm working on custom board, I'm trying to disconnect from the Central (Andriod app) when the battery is below certain level and stop re-advertising. Below is the piece of code i used:

/* Disconnect and then disable advertising ... (more)

33
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1
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1

## nRF UART v2.0 fails if advertising interval is bigger than ~100 ms

In my low-power application I need to use advertising interval of few seconds (two or more) in order to get lifetime of a year with CR2450 battery. However, the Android application nRF UART v2.0 fails to connect if the ... (more)

280
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I'm taking a look at the timeslot API example here, which was linked to in the answer to this question.

Very interesting! As I gather from the documentation for S110 and S130, it is still that case that a ... (more)

153
views
1
vote
1

## Can I change nRF5 bluetooth advertising interval dynamically?

I would like to dynamically change bluetooth LE advertising interval. I am using nRF51 and nRF52, with SDK's 8 and 12. Is that possible and how to do it?

Our application has kind of "interactive demo" mode needing short ... (more)

49
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1

Hi,

to be able to send more advertising data, i want to cyclical switch between different advertising packages. This already works so far. Do i need to include the AD flags in every advertising package or is it enough to ... (more)

26
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## Reinitialize BLE Stack [closed]

Hi everybody

I try to reinitialize the Advertising with new parameters after a finished advertising. For example use directed mode, change advertising data and so on. But all I get for the second advertisement is a BLE_GAP_EVT_TIMEOUT with the following ... (more)

115
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## how to Stop advertise when ble are connected

hello.

I want to toggle ble functions when received message from UART.

so when start message come, I start advertising and start services and stop message come, disconnect(if it connected) and stop advertising.

       if(stop)
{
if(m_conn_handle != BLE_CONN_HANDLE_INVALID) // ble ...`
(more)

71
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1
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1

Hello dear Nordic members,

I got a theoretical question: I want to connect two chips, one as central and the other as peripheral. Is it possible to stop advertising procedures, for both central and peripheral, directly after the connection is ... (more)

219
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## Timeout for directed slow advertising

In the BLE advertising library, in SDK 11, is the timeout for directed slow advertising specified in seconds, or in number of tries?

Seconds would be more consistent with the timeouts on the other modes (directed fast, fast, slow). But ... (more)

88
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## Directed (fast) advertising timeout and scanning at low power

We have an nRF51822 peripheral device that is bonded with one and only one central. The central is always an iOS or Android phone running our app, which is scanning at "low power", whatever that means for each mobile platform ... (more)

133
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61
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1

## Can I set peripheral nrf51 beacon as advertising for only specific masters

Hello,

First of all, I've read the entry below.

https://devzone.nordicsemi.com/questi...

My questions: 1 - If I cannot advertise for only specific masters, how can I provide the visibility privacy of beacons?

2 - In my use-case, I ... (more)

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