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2,273 questions

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Last activity 2017-02-25 08:33:42 +0100 by Daniel T. Lee

How Can I sniff GATT Service or Characteristic Attributes by PCA10031 (NRF51 Dongle)?

By using ble-sniffer, I success to catch BLE Advertising packet with my NRF51 Dongle in CMD and WIRESHARK either.
But, I can't sniff any other packet except type of ADV_IND, ADV_SCAN_IND, SCAN_REQ.SCAN_RSP and some of Unknown (CRC Incorrect ...
(more)

5
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Last activity 2017-02-25 06:00:55 +0100 by shuhe

After the host calls "sd_ble_gap_connect_cancel", the slave is not disconnected.

Hi.I have a qusetion!Thanks!

After the host calls "sd_ble_gap_connect_cancel", the slave is not disconnected.

What causes this phenomenon?

8
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Last activity 2017-02-25 04:38:38 +0100 by QDI

How to get device details of BLE devices seen by NRF52?

My setup is a Android phone, Nordic NRF52, and random BLE devices in the area. What I want is, the Android NRF-UART app connects to the NRF52 and the NRF52 sends information about the BLE devices it sees around the ... (more)

22
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Last activity 2017-02-24 23:31:41 +0100 by Konrad Traczyk flag of Poland

[Hardware] nRF52 - NFC antenna design

Hi,

I'm developing a project based on nRF52 and utilizing NFC for my master's degree. One part of the project will be a beacon with as small PCB layout as possible. That's why I'm considering designing ... (more)

7
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Last activity 2017-02-24 22:25:24 +0100 by Keton

NRF_LOG_FLOAT doesn't display negative numbers properly

Platform: nRF52832 using SDK12.2 and Keil 5.20a

I've encountered strange corner case when displaying negative floats using NRF_LOG_DEBUG.

My test code looks like this:

float test_float=-0.99701f;

//use sprintf as reference point
char buff[50];
sprintf ...
(more)

6
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answers
Last activity 2017-02-24 21:59:01 +0100 by Eliot Stock flag of United Kingdom

pc-ble-driver: "Failed to open nRF BLE Driver. Error code: 0x0D"

Hi.

I'm getting an nRF Dongle (PCA10031) set up on a Windows machine to be the BLE central that we'll use for our production line testing. To that end, I've built the pc-ble-driver code following the instructions ... (more)

7
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answers
Last activity 2017-02-24 17:41:25 +0100 by annapalu

Indication enable MCP lost the indication

hi all,

I have this problem:

After enable the indication i send one, with a snuffer ble i see it and recieve it. But the master control panel lost it?

Why?

Thanks, Anna

19
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Last activity 2017-02-24 16:41:55 +0100 by Romain

Serialization S132 strange behavior

Hi,

I am currently using the NRF52 in a serialized application, with the SPI bus. I am using the SDK 12.1.0 and the softdevice S132 V3.0.0

My application is running well, as expected : We perform scanning ... (more)

11
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Last activity 2017-02-24 15:56:37 +0100 by John

Receiving internal error on securing BLE link

At the moment I am working on a project that uses the nRF52328 acting as both a peripheral and central to connect 3 separate devices intermittently. I am storing their bonding information. A current problem I have now is that ... (more)

15
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Last activity 2017-02-24 14:16:19 +0100 by Sheikh_Khaled_Dubai

Are there any libraries for the connection microphone / audio codec / Nrf52dk ?

I would like to pick up audio signal with a microphone for ex. AKU340, then use audio codec to digitize it, then save the output in a SD card connected to the nrf52, reading that out and analyze at the end

6
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Last activity 2017-02-24 13:16:04 +0100 by Valer_I

SDK13 nfc_t2t_payload_raw_set() not work properly.

Hello, I use SDK example nfc_text_record for pca10040 DK. With aim to check memory area of the emulated tag I've modified example with next:

 /* Set up NFC */
    err_code = nfc_t2t_setup(nfc_callback, NULL);
    APP_ERROR_CHECK(err_code);

    static const uint8_t key[16]={0x01 ...
(more)

30
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Last activity 2017-02-24 12:21:54 +0100 by Jim

Power Profiler "Cannot find calibration values"

Hi, I have set up the Power Profiler as per the directions now on the step connecting the board to the Wiindows Python app it says "Cannot find calibration values" and the app quits. I cannot get beyond this step ... (more)

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answers
Last activity 2017-02-24 11:55:25 +0100 by AmiguelS

DTM or Radio Test

Hello! I need to perform some radio tests on a board that contains an nRF52 SoC. The nRF5 SDK provides two ways of performing such tests, either using DTM, as specified by Bluetooth SIG, or using the Radio Test example ... (more)

9
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answers
Last activity 2017-02-24 10:04:31 +0100 by Srikar

DFU app data and FDS

Hi, I have initial flashed boot loader and application based on SD version 3.1 and SDK 12.2.0 with

DFU_APP_DATA_RESERVED CODE_PAGE_SIZE * 3

FDS_VIRTUAL_PAGES 3

later updated both boot loader and Application with below change

DFU_APP_DATA_RESERVED CODE_PAGE_SIZE * 6
FDS_VIRTUAL_PAGES ...

(more)

11
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answers
Last activity 2017-02-24 09:17:21 +0100 by Yogesh

Jump to another application through bootloader

I am using nrf52832 with sdk 13.0.0.-alpha.I only want to boot the application and jump to blinky project address.For that i am using secure dfu example code.I am using IAR embeed workbench Sequence for ... (more)

11
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answers
Last activity 2017-02-24 08:36:50 +0100 by design10

Gazell does not work with nrf 52832

Nice to meet you.

The chip uses nRF 52832. MDK keil μVision V 5.22.0.0 is used as the development environment.

Since I confirmed the operation with the sample project using the nRF 52 Development Kit, I am ... (more)

13
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Last activity 2017-02-24 08:19:39 +0100 by Mario

NRF24l01+ broad-spectrum issue

Hi!

We are trying a new module with NRF24l01+. We find a troublesome thing. On this video you can see the RF communication starts and stops with a broad-spectrum signal. This module has CE FCC and IC approval.

https://www ... (more)

12
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answers
Last activity 2017-02-24 08:06:47 +0100 by phaldecoa

Bluetooth MIC <==> Bluetooth Speaker

I am trying to develop a BT Microphone that can pair directly with a BT speaker.

The Mic will act as a server for the speaker (client).

I have some nRF52 EVB.

Do you have a reference design to achieve ... (more)

19
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answers
Last activity 2017-02-24 04:41:40 +0100 by MW100

can't find CDC UART PORT

As the website of nordic shows, I download all the softwares and drivers to build a bluetooth network based on mesh nodes. However, when I open the nRF Connect, I can't select serial port and can't find the ... (more)

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Last activity 2017-02-24 03:17:22 +0100 by MW100

nRF Connect can't select serial port and start scan

Hi there! I am a beginner of bluetooth technology.

We try to build a kind of IoT based on bluetooth mesh nodes with nRF51822. According to the instruction of nRF Connect 1.1, we download all the software and drive ... (more)

24
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Last activity 2017-02-23 19:25:59 +0100 by User1321

nRF Connect PC tool Log File and Maximum Time Interval

I am using the nRF Connect Tool, everything is working fine (Y) My question is related with the Log file, is there any way to get in the Log File only the data sent through BLE, for example the value ... (more)

34
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Last activity 2017-02-23 19:06:17 +0100 by User1321

Receive BLE transmission on any Bluetooth Module connected to the PC

I am using a nrf52 development kit as a peripheral to send data . It is working fine if I use the nrf Toolbox app on my phone, but is there anyway that I can see the 'raw' data on my ... (more)

27
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Last activity 2017-02-23 15:15:29 +0100 by Erlend

LSByte first in radio payload field?

Reading the nRF51 RM. On page 82 there is this:

a

But it doesn't make sense to me to talk about the LSByte of the PAYLOAD field, as it's just arbitrary data, and the Radio specs are agnostic of ... (more)

16
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Last activity 2017-02-23 14:40:48 +0100 by PawelM

nRF52 DK UARTE with EasyDMA TX and RX

Hi!

Does anyone run UARTE with EasyDMA enabled? I don't want to use interrupts and simply copy every received UARTE bytes to global tx_buffer....and pooling with amount of data / parsing data or workaround timer related with RX_pin activity ... (more)

44
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Last activity 2017-02-23 14:24:54 +0100 by Paddy

What could make nRF52840 radio hang in TXDISABLE state?

I have a very simple test program to run the radio through the transmit sequence, each task is called from the radio interrupt handler according to each event. The process works correctly through the sequence (disabled>txru>txidle>tx>txidle ... (more)

77
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Last activity 2017-02-23 12:07:12 +0100 by Fiske

BLE disconnect

I use below code to disconnect the BLE device from mobile phone. But it return err_code =7. Please comments.

            if(m_conn_handle!=BLE_CONN_HANDLE_INVALID)
                 {
                   LocalInitiateddDisconnect = true;
                    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                    APP_ERROR_CHECK(err_code);
                 }

31
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Last activity 2017-02-23 11:04:21 +0100 by johnofleek

nrf51822 PIXIT RF-PHY:P9:1 RF-PHY:P9:2 RF-PHY:P10:1 values

Hi

We are about to submit our system for BLE testing. We have been asked for RF-PHY:P9:1 RF-PHY:P9:2 RF-PHY:P10:1 values

RF-PHY:P9:1 Maximum TX packet length (MAX_TX_LENGTH)

RF-PHY:P9:2 Maximum RX packet ... (more)

31
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Last activity 2017-02-23 04:13:00 +0100 by DK

nrf51822 R&S file for calibrate RSSI

hello

In proprietary model of nrf51822,I doubt that the RSSI is not accurate in my testing environment,so i want to calibrate the RSSI info by using R&S®SMU200A,can anybody support me the R&S wave file ... (more)

8
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Last activity 2017-02-23 03:30:14 +0100 by alex

how to use WDT when it going to memory retention ,timer on model(nRF24LE1))

the application need the nRF24LE1 to go to memory retention sleep model for more than 2s,and we know that RTC can only timer for 2s.i used WDT to do this job , but there is a problem ,that is ... (more)

42
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Last activity 2017-02-22 23:23:15 +0100 by SUK

Humidity Temperature value displayed wrongly

Hi, I am interfacing a temperature and humidity sensor (si7021) to Nordic nRF52 development kit board. The sensor works fine and I can read accurate temperature (23 degree Celcius) and RH (44%) values. But when I transfer those values over ... (more)

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