# 24,486 questions

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## Unusual behaviour with specific model host (SM-T580) with nRF52

Hello there,

I am working with a peripheral device that we are testing with many different devices, and have run into a very unusual issue. With a brand new Android tablet (SM-T580) we are unable to connect to our prototype ... (more)

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## buttonless DFU SDK v14.0 problems

Hello,

I am having difficulty downloading an application using the sample images provided. It looks like the application boots into the bootloader, there is a brief message that it is downloading but then the name changes to DFUTEST and LEDs ... (more)

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## SDK 14: issue with secure buttonless DFU

I was trying to verify the DFU functionality on SDK 14 on nRF52832. Here is what I did. 1. Using nRFgo to erase all 2. Program bootloader/soft device with C:\svn\nordic\nRF5_SDK_14.0.0_3bcc1f7\trunk\examples\dfu\secure_dfu_test_images ... (more)

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## Cannot program WT51822-S4AT

I'm trying use an nRF51 PDK to upload firmware (or, rather, just confirm that I canupload firmware) to one of these modules: http://www.wireless-tag.com/wireless_...

The target is externally powered, so I've connected it like ... (more)

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## advertising manufacturing specific data without company id?

Hello, we would like to release our product to the market.

Our device is a (BLE) beacon based on nrf52 which is advertising some data encoded as manufacturing specific data but with a company id of 0xFFFF which is for ... (more)

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## LE Secure Connection Pairing, not encrypted

I am using the ble_app_multirole_lesc example to test out LE Secure Connection Pairing. I can pair and bond and see on the sniffer that it is actually doing LE Secure Connection Pairing. I can see the key exchange process and ... (more)

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## HCI command sequence for BLE

Hi,

I am new in BLE and working on existing product. i am adding BLE functionality in the existing product hence having one host MCU on my board. My product will be in central mode and will communicate with the ... (more)

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## BLE characteristic array/set

i know that it's not up to you guys to tell me this but maybe you can give me a hint: right now i'm using the bluetooth developer studio together with the nordic plugin for code generation to ... (more)

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## Build option not available on Blinky

I have installed and un-installed all the required components to run the dev kit with eclipse. As everyone knows this is complicated because there are multiple sources of instructions of different ages that sometimes conflict with each other or assume ... (more)

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Hello, I'm having latest nRF connect for Android v4.13.1. I'm running it on Samsung S6 (model SM-G920F) Android 7.0 nougat; build version (NRD90M.G920FXXS5EQG); Kernel from Jul 4 2017. I'm using phone as GAP ... (more)

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## TWI blocks after send receive sequences

Hello

I am using a custom board, based on nRF52832 CIAAB0. I have also S132 installed, and I am using SDK 13.1.0. TWI pins are P0.16 - SCL & P0.18 - SDA. The code is based on twi_sensor example ... (more)

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## Can I use same handler for two different SPI's interfaces?

HEllo,

I was wondering whether or not is advisable to use the same handler to handle transmission/reception of data over SPI0 and SPI1 interfaces.

I have two sensors connected each one to each SPI, let's say sensorA to ... (more)

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## BLE Scanning not working

Hi

I am trying BLE multirole application ble_app_multirole_lesc from the SDK 13.0.0. I am using nRf52832 DK along with GCC toolchain. For debugging I am using Segger RTT and have added some of my own debug string to ... (more)

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## Why was a malloc with heap_size = 0 successful?

We started with the default project that have no heap. Added mallocs to the system and they seemed to succeed, without realizing heap was set to 0. They did not return NULL.

I would have expected the mallocs to fail ... (more)

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Hi,
I need help with alert notification service. I am working on alert notification example provided in the SDK 12.3.0 with S130. I tried this example on nrf51422 development board and it is working. After changing to RAM ...
(more)

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## Bluetooth Development Studio with Nordic plugin for SDK 14

In an earlier post ( https://devzone.nordicsemi.com/questi... ), Nordic indicated that a new version of the BDS plugin would probably be available when SDK 14 was released.

Do you have any news on this?

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## Why Additional features of nRF Connect for Android only not for iOS?

I'm talking about these following features:

1. Parses values of most of known
2. characteristics GATT server
3. configuration Listing paired devices
5. (peripheral role) Simultaneous
6. scanning, advertising and maintaining multiple connections

7. Full support for Eddystone beacons and iBeacons ...

(more)

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## Uart on custom Board.

hello we have custom board with Nrf52840.

i already test the uart code on nrf52840 dk..every thing is working great. my custom board is connect to the nrf52840 dk with debug connector. debugging is working great on custom board ... (more)

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## ble_app_uart_c on PTR5518 ble chip

Hi, I am working on ble_app_uart_c example provided in SDK12.3.0 with S130. I tried this example on PTR5518 ble chip but suddenly device goes resetted every time.I am printing some text from uart in real terminal using ... (more)

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## How to generate random keypass ?

I want to communicate Central and peripheral devices with KeyPass. Also I want to generate keypass in Peripheral device. But keypass should to include symbols, low/upper case and random character like "sP25Scw!HU?". I tried this code;

char *randstring ...
(more)

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I am using SEGGER Studio on MacOSx.

When use the latest mesh SDK, I can run the light_control example and see the debug log in the Debug Terminal of SEGGER Studio.

However, when I use BLE SDK 12.3, I ... (more)

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## Unable to see NRF_LOG BLE SDK 12.3 [closed]

I am using SEGGER Studio on MacOSx.

When use the latest mesh SDK, I can run the light_control example and see the debug log in the Debug Terminal of SEGGER Studio.

However, when I use BLE SDK 12.3, I ... (more)

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## How can I use the FDS module?

In fact,there is a demo on internet, and I test it ,but I found that the event is not reliable! my code is : static void my_fds_evt_handler(fds_evt_t const * const p_fds_evt) { switch (p_fds_evt->id) { case FDS_EVT_INIT: if (p_fds_evt->result == FDS_SUCCESS ... (more)

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## Battery consumption using twi pheripheral

Hello,

I am using a custom board with nrf52382 chip and mma8652 accelerometer, This accelerometer has only i2c peripherals to communicate with. I am using twi_software and SDK 11 with s132v2.0 soft device to make the communication done.

bool ...
(more)

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## Is it possible to set the nRF51822 to only advertise the device_name?

I wish to set the nRF51822 to only advertise the Device_Name that I have set.

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## Is there any spis event generated when the slave is selected?

Currently I am using the spis driver to send data through the SPI peripheral. On the event handler I want to capture the time in which the chip is selected, which in the case of my application, is when the ... (more)

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## DFU buttonless with SDK11

Hi all,

I have a custom board with a nRF51 and a DSP connected to eachother (SPI, UART and I2C) and since I have no connection to the nRF directly or any buttons I need to make upgrades on the ... (more)

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## Android devices lose bonding

Hi,

we've developed a custom board with nrf51 and use bonding and white listing.

Everything works fine when connecting and bonding iOS phones with this devices but with Android things are a bit more difficult.

Somehow after bonding certain ... (more)

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## Disabling S132 Softdevice when running FreeRTOS

Hi All, Nordic,

In my application, I don't always need BLE connectivity, so I was hoping to disable the S132 softdevice when not needed. However when I do this FreeRTOS stops working normally.

Any thoughts? Is there an alternative ... (more)

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## Where can I get example Mesh Network NRF52840?

As the tittle I want to develop Mesh Network with nrf52840 chip. Where can I get this example? Thanks!

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• Resolved questions: 10098
• Total questions: 24490

## Recent blog posts

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## Recent questions

• ### Unusual behaviour with specific model host (SM-T580) with nRF52

Posted 2017-08-18 01:10:50 by Musa
• ### buttonless DFU SDK v14.0 problems

Posted 2017-08-18 01:08:35 by ajc
• ### SDK 14: issue with secure buttonless DFU

Posted 2017-08-18 00:38:25 by Rbai
• ### Cannot program WT51822-S4AT

Posted 2017-08-17 22:30:09 by zolotiyeruki
• ### advertising manufacturing specific data without company id?

Posted 2017-08-17 22:17:47 by gorazd