# 50 questions

Tagged
• x
48
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3
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## ANCS Code base (bonding) with NUS and strange behaviour with nRF Toolbox

Hello the Nordic Team,

I come here after a lot of research and testing and do not understand what is going on in my program. (is it Embedded or iPhone nRF Toolbox side ?)

I took the ANCS code ( nRF5_SDK_12.2 ... (more)

48
views
1
vote
1

## NRF_LOG not working with SDK12.3.0

I can't get NRF_LOG working with SDK12.3.0. Using the same main.c and sdk_config.h from SDK12.2 - here NRF_LOG is working well - I get no messages in J-Link RTT Viewer with SDK12.3.0. ANY hints ... (more)

70
views
no
3

## Is it possible to refuse a connection from a central device?

I'm developing a project based on the Nordik UART Service and I wouldn't use pairing as in the example.

However I have some problem when a central device is already connected to my nRF52, if I try to ... (more)

179
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1
vote
2

## Broken NUS after iOS 10 upgrade

After upgrading to iOS 10, I have been unable to successfully interact with my device using the NUS. I used to use the NUS to communication with the device and retrieve stats. For example, I would send a "T" message ... (more)

105
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no
1

## Is it possible NRF52 NUS service and Buttonless DFU service work together like the given example, ble_app_hrs, s132_with_dfu? [closed]

Hi,

I was trying to add buttonless DFU service along with NUS service. I used SDK v11. Taken the example ble_app_hrs, s132_with_dfu. And added my existing NUS service. I faced a problem that, both are not working together. If i ... (more)

47
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no
1

## connect nrf51822 board with NUS profile to windows 7 (serial)

Hi,

I have a running board with NUS service (serial profile). This boards starts advertising until a remote device (android nrf UART app) connects to it. then it starts sending some data to the remote device.

My goal now, is ... (more)

129
views
1
vote
1

## ble_nus_string_send() busy wait or interrupt

Hi,

I am working on an application which sometimes needs to send a buffer of a couple of KB to a connected smartphone using the nordic uart service.

The function used is ble_nus_string_send() and it can send a maximum amount ... (more)

71
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no
no

## Ble_app_uart current consumption

I am developing a battery powered application using the Nordic UART Service.I intend to use the ble_uart peripheral example as it is , modifying it as per the application.The peripheral is battery powered and has to do both receive ... (more)

63
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no
1

## ble_nus stops working after central connection

Hi,

I just found what looks like a bug in ble_nus.c in SDK12 - not sure how to report it so I'm just doing it as a question/answer combo.

Basically:

• Connect to nRF5x normally (treating it as a ...
(more)

60
views
1
vote
1

## Integrated bluetooth device on windows and NUS service

Previously i've been using the nRF dongle using the BLE NUS Central example to communicate to another nRF DK with the BLE NUS Peripheral example via serial/termite and ble nus.

Could I use the integrated bluetooth device on ... (more)

117
views
no
1

## Merging NUS with LBS returns NRF_ERROR_NO_MEM

Hi, I use PCA10040 v1.1 with SDK12.1 via S132 v3.

I use Keil 5.21.

After testing the LBS example, I was merging the NUS (NORDIC UART Service) to the standalone LBS example.

However, the sd_ble_gatts_service_add (which is ... (more)

206
views
2
1

## ble_uart demo throughput is very slow

Hello Nordic,

I am using the BL600 third-party module and SDK 10. I was able to modify and compile project with GCC at examples\ble_peripheral\ble_app_uart\ for s110. It works nice, but the transfer speed is very low (around 500 ... (more)

275
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2
2

## Can't find BLE Peripheral after disconnect [closed]

Hi,

After I've successfully connected my smartphone via nRF Toolbox's UART-BLE Service to my nRF52 peripheral, I tried to mimic the scenario when the devices get disconnected. This is done by disconnecting the device on the central/smartphone ... (more)

259
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no
1

## Unable to receive UART-BLE from peripheral [closed]

Hi there! I'm using the nRF Toolbox's UART to test the receiving of my data stream. I'm trying to send a data array collected (from spi) in my main loop and send it via UART-BLE to my ... (more)

109
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no
no

Hi,

I am using nRF51-DK with softdevice S130 and SDK 12.0. I am working on the BLE central role with ble_nus_c service. I am able to setup the multiple connection with central and data exchange with them. But i ... (more)

103
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2
2

## Is there a PC (win / debian) application or source for NUS?

Hello!

Nordic UART Service (NUS) is a pretty handy way of implementing a serial data transfer service over BLE. The nRF Toolbox on Android makes it very easy to test it, however I could not find any such program (or ... (more)

316
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1

## Why delay make ble_nus_string_send() totally not working?

A beginner's question.

I am using UART over BLE to send data out.

As codes below, ble_nus_string_send() works and continuously sending data out, with the Wireshark's help, I can see notification packet are always sending out.

when I ... (more)

142
views
no
1

## Can I use NUS service without having the UART pins configured/connected?

Hello,

I want to use the NUS service on my BLE communication. I don't have pins connected for UART, do I need to have them? When I try to run the device, my program initializes all the blocks being ... (more)

147
views
1
vote
1

## Efficiently sending 'printed' data with Nordic UART

In my code, I have some 'print'-style functions that write data to a buffer, and that buffer then goes to the Nordic UART implementation. This is user code, and I don't know when it's 'done' printing. Let ... (more)

271
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no
1

## nRF52DK ble_uart and DFU does not work

Hello All,

At a time either ble nus or dfu can work.

I have an problem with the services ble nus for uart and dfu does not work simultaneously means if i am adding both the services in my profile ... (more)

121
views
1
vote
1

## Strange problem with Scheduler plus SPI

Hello everyone! Frist of all, sorry for my broken English.

I had a timeout handler, which call by application timer every 50ms. In this function I took data from accelerometer via SPI, this method doesn't work. As I know ... (more)

236
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no
1

## BLE multirole implemntation

Hi,

Currently i am using ble app uart as a reference example and nus service with soft device S130 for our project. I want to use multi role example (central and peripheral), in SDK 11.0 example is given for ... (more)

386
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1

## Contradictory Nordic UART Service TX/RX characteristics UUID

Hello, I find in your source code contradictory values for the UART TX and RX characteristics.

E.g. have a look at nRF toolbox (both Android and IOS) definitions: https://github.com/NordicSemiconducto...

static NSString * const uartTXCharacteristicUUIDString = @"6E400003-B5A3-F393-E0A9-E50E24DCCA9E";
static NSString ...
(more)

204
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no
1

## ble_app_uart_c dongle with passkey

Hi all,

I seek an advice on the passkey topic. Have been researching the topic all day but still have some confusion. I am running SDK 10.0 ble_app_uart example on nRF51 DK and ble_app_uart_c on the nRF51 dongle. The ... (more)

506
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2
1

## nRF52 recommended ways to reduce and deal with 3004? [closed]

Hello Pros,

I maybe running the nRF52 close to its limit. It appears to have a probability of 1/1000 to 1/2000 to hit a 3004 in a continuous time-gated packets stream.

The packets are scheduled in synchrony with ... (more)

117
views
no
2

## How could I use NUS without service discover? [closed]

Hi.

I want to make a device which can connect each others and communicate with NUS. I need not to use any other service without NUS. I made nus_c service which is a central side service to use NUS which ... (more)

156
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no
no

## nRF UART Android app - use monospaced font?

The nRF UART Android app currently uses a non-monospaced font; so, for example, a '1' is a different width to a 'W'.

This makes it hard to view strings where the fields should "line up".

How can I change this ... (more)

593
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2
2

## Nordic UART Service: Feed data to multiple Android Apps?

Is it possible to have the data from a Nordic UART Service (NUS) fed to multiple Apps (on the same Android device)?

317
views
1
vote
1

## packet loss issue with nus service

I am sending IMU data as 20 byte packets through nus service at the rate of 50 such packets per second. The device is a nrf51 DK configured as ble peripheral (S110). The application contains twi to read data from ... (more)

459
views
1
vote
2

## Pstorage and NUS not working together

Hi,

I have a project that uses PStorage and the Nordic UART Service. PStorage is used to store a variable that is updated by the device, irrespective of the Bluetooth, and needs to be sent over the NUS when requested ... (more)

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