5,858 questions

Hi,

I compiled the nrf_heart_rate_collector. Apparently, this program only works once, between each run, "remote device" and USB dongle has to be resetted (unplugged from USB connector and plugged again).

Apparently connection is not closed correctly.

Program's main function ... (more)

Hi,

I am new to Keil and nrf51 development so please forgive me if I ask a stupid question.

I have followed the steps from the user guide and installed Keil (version 5.14), SEGGER and the nrf51 SDK. Then ... (more)

Hi,

I'm developing on a custom nrf51822-based board, and using the s110 softdevice, version 7.0.0. With JLinkGDBServer and the toolchain's gdb, I can debug softdevice-less applications normally.

Problems arise when I build my apps on top ... (more)

Hi guys, I want to know if it is possible to get started on developing applications for nRF51822 without using the evaluation kit. I want ot have a couple of breakout boards made and buy a debugger to flash the ... (more)

Hi,

This time I am trying to work out the UART example.

I got it to the point where it is advertising, but the advertisement is wrong.

When I check with an Android phone, the advertisement data is all the ... (more)

First, many thanks for the great DFU recipe in the latest SDK!

I've ported OTA DFU to the IAR tool chain for both s110 and s310. I can flip back and forth between the two softdevices by updating from ... (more)

We are using S130 v0.9 stack,

and when BLE device A is connected as peripheral of iphone

and central of BLE device B at the same time

iPhone --> A ---> B

Device A cannot stop or start advertisement

The err_code ... (more)

in nRF51822 product specification a maximum absolute rating of 3.9 Volt is reported, while in electrical specification the maximum voltage is 3.6 Volt. The question is : can the chip withstand , and operate at , a voltage slightly above 3 ... (more)

Hi, I'm trying out S130 SoftDevice. I have 1 device with S110v7 which acts as a peripheral. 2nd device contains S130 0.9 (I've based my code on S120 multilink central example).

It works fine. I can connect ... (more)

Hi, Since version v1.16, nRFGo Studio don't start. The installation is correctly done, but when I launch software nothing occured.

The version 1.14 launch correctly. I'm working on nRF51 and I would used the newest version ... (more)

Hi,

I am trying to develop an ANT+ application using the nRF51422 chip with S210 Softdevice. To prepare myself for the task, I am studying how the ANT+ works using the nRF51 Development Kit PCA10028 v1.1.0. I am ... (more)

S110 8.0.0 was just released allowing a larger ATT table, which is something we need, but is there a corresponding SDK update for this SD before we spend the time upgrading out codebase? There are a number of ... (more)

Hey All,

I am working on a project that involves a Redbear Labs Blend as a sensor platform, then transmits the data to a dfrobot Bluno over nRF8001 BLE. I'm still new to both chips and naive to their ... (more)

I am a very beginner on embedded field.

I have a nrf51822 and tmp 102. I follow this direction on mbed site

link text

and it's actually working. The code provide is C++, simple and easy to understand. The ... (more)

I try to use Android studio to build nRF Beacon project,but it didn't work ,and there are several error . the error is

Error:(50, 35) No resource found that matches the given name (at 'layout_width' with value '@dimen ...

We are having some trouble with battery percentage measurement. The battery percentage being reported, keeps fluctuating. Earlier the fluctuations were as large as 3% to 100%.

After averaging across three points, the fluctuations are between 45% and 90%.

We are ... (more)

Hi,

I have paired two 51822 watches on iOS 8 on iPhone 6 plus. I found that when two watches moved far away and move back to the phone. The phone will not connect to either watches. It is 100 ... (more)

Hi,

I recently made some changes to the code and noticed the following errors for the first time. Error: L6406E: No space in execution regions with .ANY selector matching main.o(.data). Error: L6407E: Sections of aggregate size 0x20 bytes ... (more)

Hi, all! I am rencently studying ota,and that is what I have done:

1. Program softdevice 6.0 into my nrf51822 chip.
2. Program bootloader(version in SDK5.2) into my nrf51822 chip.
3. Use Nrf_TooBox app to upload an application into ...

Hi, I have created up to 5 custom services with several characteristics (4 at maximum) each one. They all use the same base UUID. The problem I'm facing now is that when I execute 'services_init' function, the function 'sd_ble_gatts_service_add ... (more)

Hi all,

If I want to send a table that contains a structure in each of his cases using sd_ble_gatts_hvx(), can I get it ?
Knowing that the second parametre of sd_ble_gatts_hvx() contains a ble_gatts_hvx_params_t variable, which has the uint8* p_data ...
(more)

hello everyone, I recently purchased the new nRF51 dongle. I could successfully load the blinky example with S110 soft device to it. But it is not working with the HRS example. I could not discover the device using Master control ... (more)

Hello

I have the nRF51822EK PCA10001 (V1.0) and PCA10000 (V1.0).

I'm working on a project where i'm going to send data from a custom board over to the PCA10000 dongle, and import the data from the ... (more)

Hello everyone,

I have a nRF51822 dev board connected through USB to my PC.

I have connected it to COM5 using Terminal and now I would like to interrogate BLE like we do in Arduino using AT commands, is it ... (more)

We are configuring the watchdog like this:

// Watchdog
NRF_WDT->CONFIG = (WDT_CONFIG_HALT_Run << WDT_CONFIG_HALT_Pos) | ( WDT_CONFIG_SLEEP_Run << WDT_CONFIG_SLEEP_Pos);
NRF_WDT->CRV = 3*32768;   //ca 3 sek. timout
NRF_WDT->RREN |= WDT_RREN_RR0_Msk;  //Enable reload register 0
NRF_WDT->TASKS_START = 1;

This comes from one of the examples. If ... (more)

i am trying to make connections between s130 device and end node which have heart rate service. according to the s130 document once if you press the button 0 it will automatically do connections with end device,but i am ... (more)

Hi

during setup of a peripheral at startup, I need to add some wait periods in between steps of the setup. Is there some function like waitMS(int time) or something, that would make the processor wait during a number ... (more)