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49
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2
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1
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Last activity 2017-09-13 13:06:18 +0200 by Petter Myhre flag of Norway

Problem with ble_advertising_restart_without_whitelist

I have a problem using ble_advertising_restart_without_whitelist(). According to the documentation (as I understood) it should start advertising without whitelist even if a whitelist exists (hence it skips BLE_ADV_EVT_WHITELIST_REQUEST). In the next call of ble_advertising_start() advertising should use the whitelist again ... (more)

79
views
2
votes
1
answer
Last activity 2017-09-05 21:03:27 +0200 by Cole

why does nrf52832 ble peripheral device reset after advertising timeout?

after the advertising timeout occurs the board goes into sleep mode and then immediately runs from the top of the main function. I know that a pin state change can wake up the device. Is there any other way that ... (more)

46
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no
votes
no
answers
Last activity 2017-09-05 11:32:03 +0200 by Torfinn Berset flag of Norway

Samsung Galaxy S8 cannot find nRF52 after Directed Advertisement

We have a discovery issue that seemingly only happens with the Samsung Galaxy S8.

We are using the nRF52832 with SoftDevice S132 v2.0.1, and do directed advertisements to the last connected peer when disconnecting. We do not use ... (more)

103
views
no
votes
2
answers
Last activity 2017-08-21 15:07:14 +0200 by run_ar

BLE advertising data flags field and discovery

For the BLE GAP advertising flags byte in the advertising data, we have the following options:

/**@defgroup BLE_GAP_ADV_FLAGS GAP Advertisement Flags
 * @{ */
#define BLE_GAP_ADV_FLAG_LE_LIMITED_DISC_MODE         (0x01)   /**< LE Limited Discoverable Mode. */
#define BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE         (0x02)   /**< LE General Discoverable Mode. */
#define BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED         (0x04)   /**< BR/EDR ...
(more)

80
views
no
votes
1
answer
Last activity 2017-08-21 13:11:05 +0200 by endnode

SCAN_RSP and SCAN_REQ

The scan request consists of two device addresses, without any host data. What is the effect of the scan request and the scan response?

53
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no
votes
1
answer
Last activity 2017-08-21 11:33:44 +0200 by Bjørn Spockeli flag of Norway

Advertising on secondary frequency channels

Hello,

I'm looking at BLE 5 advertising packets and the new feature allows to redirect the adv packets from primary frequency channels to secondary ones with an option to switch the PHY (for example for "LE Coded") as described ... (more)

51
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no
votes
1
answer
Last activity 2017-08-15 17:14:56 +0200 by stepik

BLE5 advData length

Hi,

I'm working with nRF52832 chip following the example "ble_app_beacon". I see the advertising packet is limited to 31 bytes only. However, I'd like to take an advantage of BLE 5 spec and increase the size to 255 ... (more)

54
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1
vote
1
answer
Last activity 2017-08-14 07:58:46 +0200 by RohanKadam

Problem with system off mode and stopping advertisement [closed]

Hi,

Most of the sections of my application are functioning as I want it to, except these two (step 3 and step 4).

Application:

  1. Connect device (with Auto connect enabled)
  2. Transfer data using nus service from peripheral to central device ...
(more)

28
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no
votes
no
answers
Last activity 2017-07-27 17:13:36 +0200 by Nivetha flag of Netherlands

nRF52840 no longer advertising or flashing led

I have been testing out with NRF52840 and verifying the data transmission using the NRFConnect app on my mobile. I am not sure what went wrong! It's no longer advertising and I get to see the device under the ... (more)

40
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no
votes
1
answer
Last activity 2017-07-24 16:33:06 +0200 by bayram

DEVNAME maximum length

Hello,

I am working on a project with STM32 master and nRF51822 slave connecting to Android/iOS mobile apps.

I send the advertising parameters from STM32 to my nRF51822 (the name is one of the parameters and I am sure ... (more)

62
views
no
votes
1
answer
Last activity 2017-07-22 07:01:18 +0200 by RK flag of Singapore

connection request to a known address

Hi guys, I want to ask if it is possible for a nrf51822 to connect to a Central ( my cell phone) without advertising. Let assume that my cell phone has nrf51822's MAC address from the first connection and it ... (more)

169
views
10
votes
1
answer
Last activity 2017-07-19 22:56:53 +0200 by endnode

How can I measure the advertising intervals of a peripheral?

I would like to know how frequently my peripheral is sending advertising and data packets. I've tried using ble-sniffer-osx but it doesn't actually reveal any device names for some reason, so it's not trivial to use. Is ... (more)

48
views
2
votes
1
answer
Last activity 2017-07-19 11:11:16 +0200 by endnode

What is typical data rate during sending advertisements?

I found out answers for calculating data rate during connections, which depends upon connection interval, no of packets allowed in each connection and no of bytes in a single packet.

However, how can I calculate data rate applicable during sending ... (more)

119
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no
votes
no
answers
Last activity 2017-07-18 16:31:13 +0200 by paula

setBeaconLayout on Android-Beacon Library

Has anyone successfully used the Android-Beacon Library to detect the nRF51822 Beacon on and Android application? I tried several different layouts but I just can't detect it.

public class MainActivity extends AppCompatActivity implements BeaconConsumer {

protected static final String TAG ...
(more)

1k
views
2
votes
2
answers
Last activity 2017-07-18 15:54:58 +0200 by joao pimenta

nRF51822 - Connect without advertising

In short:

  • Is it possible to connect a nRF51822 s110 peripheral from a central without the need for sending advertising packets (by peripheral)?
  • If (hopefully) yes, what's the required steps (shure, the central must know the MAC)?

A stupid ... (more)

82
views
no
votes
1
answer
Last activity 2017-07-17 13:29:37 +0200 by Petter Myhre flag of Norway

Is it possible to advertise more than 31 bytes of data using S140 SoftDevice version 5.0.0-3.alpha?

I'm using the with SDK version 13.1.0 along with S140 SoftDevice v 5.0.0-3.alpha and trying to utilize the Bluetooth 5 Extended Advertising feature.

The function ble_advdata_set() limits the data size to BLE_GAP_ADV_SR_MAX_LEN_DEFAULT which is ... (more)

78
views
2
votes
1
answer
Last activity 2017-07-13 07:29:34 +0200 by RK flag of Singapore

Receiving Scan Requests without Making Advertisements

Can a BLE peripheral listen for scan requests or any commands from BLE central without making any advertisements? If this is possible, then it would save on the transmission power required for sending advertisements.

Also, can a BLE central send ... (more)

143
views
no
votes
1
answer
Last activity 2017-06-29 13:22:58 +0200 by Gordon

High power consumption after disconnect

Hi,

I've just hit a strange issue with SDK 12.1 on nRF52832.

Usually on BLE_GAP_EVT_DISCONNECTED, sd_ble_gap_adv_start gets called to start advertising and everything's great.

However, if I don't call sd_ble_gap_adv_start, advertising stops (as you'd expect ... (more)

90
views
no
votes
1
answer
Last activity 2017-06-26 16:13:23 +0200 by Kristin flag of Norway

Advertising with device_name Vs whitelisting

I am confused with whitelisting and advertising/scanning with device name

I have a peripheral and a central device, peripheral device is advertising with device name set as 'PERIPHERAL_DEVICE' and my central device is scanning for the name 'PERIPHERAL_DEVICE' (m_target_periph_name ... (more)

79
views
1
vote
1
answer
Last activity 2017-06-21 15:48:19 +0200 by Rajat flag of India

MPU data in dynamic advertising packet

Hi friends...!

I want to put dynamically changing MPU data into the advertising packet. I am putting my accelerometer data into manufacturer specific data field of ble_advdata_t structure. but the problem is that the data is not changing with every ... (more)

45
views
no
votes
2
answers
Last activity 2017-06-20 11:28:05 +0200 by Guillaume Levant

DFU Service in scan response advertising data

Hi,

I am designing a BLE Device based on nRF51822, which broadcast three services : one home made service, the Battery Service, and the DFU service for the OTA update.

When the device is advertising, it is supposed to broacast the ... (more)

83
views
no
votes
1
answer
Last activity 2017-06-06 14:47:30 +0200 by Kristin flag of Norway

Beacon disconnects and stops transmitting after a period of time

Good Afternoon,

I hope someone can point me in the right direction.

We've customised an NRF51822 beacon and made it into a sensor but there seems to be an strange error, I'm a bit lost as to where ... (more)

86
views
no
votes
1
answer
Last activity 2017-06-06 06:06:16 +0200 by Roger Clark

How to make nrf51822 generate advertising one time(just one time) and then disable the advertising?

Hi dear all: The question as the title says, Thanks in advance !

159
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no
votes
2
answers
Last activity 2017-06-01 09:17:01 +0200 by endnode

how to set the advertising intervals to 30 seconds?

Hi,

I am using the nRF52-DK as a device like beacon encodded with the original code of "nRF5_SDK_13.0.0_04a0bfd\examples\ble_peripheral\ble_app_beacon. I want to change the advertising intervals to 30 seconds. However, the maximum advertising intervals is limited ... (more)

115
views
no
votes
1
answer
Last activity 2017-05-30 11:26:32 +0200 by Petter Myhre flag of Norway

S140 - Non connectable advertising interval

Hi everyone!

My question is for engineers of Nordic. I need to apply NRF52840 as a "beacon". As there is no ready templates of beacons in nRF5_SDK_13.0.0-1alpha_055eef3, I took as a basis the template "ble_app_beacon_pca10040_S132" (NRF52832) and ported ... (more)

565
views
5
votes
2
answers
Last activity 2017-05-23 07:04:02 +0200 by Igor

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)

84
views
1
vote
1
answer
Last activity 2017-05-22 12:53:31 +0200 by Kristin flag of Norway

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?

953
views
3
votes
3
answers
Last activity 2017-05-17 08:40:38 +0200 by jwx

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.

I haven't had ... (more)

190
views
1
vote
1
answer
Last activity 2017-05-04 12:07:28 +0200 by Petter Myhre flag of Norway

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)

148
views
no
votes
no
answers
Last activity 2017-04-28 08:23:45 +0200 by Milk

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: image description

image description

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

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