# 28,688 questions

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## Example code for PWM using PPI, nRF51822

Hello,

I have the nRF51822 Evaluation Kit. I have run the basic code examples like 'Blinky' and the BlueTooth HRS (Heart Rate) application, successfully. Now I would like to start building my application, and this requires a PWM, however I ... (more)

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## Eclipse compiling [closed]

Hi all,

I have followed the guide (AN-29) for using eclipse with the nRF51822 but it gives me several errors.

First at all, the linker says: ...../arm-none-eabi/bin/ld.exe: cannot find -lnosys. I found that this library was declared ... (more)

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## iPhone demos: location of associated Keil project file(s)?

Hi,

Just bought the nRF51822 eval kit. Looks like it came with some great demos for iPhone (nRF_Demo_Utility, nRF_Proximity, nRF_Temp, nRF_UART), but having trouble getting these demos to work! Did Nordic provide associated Keil project files for these? I think ... (more)

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## Specify Port for L2CAP Communication

Hi all,

I am trying to specify a fixed port for a L2CAP connection on the nRF51822. The client is a Linux box running bluez (which has BLE support). The client software is designed in Qt, which exposes the underlying ... (more)

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## nRF9E5 developer

Hi My name is Bernard Britton from Trinidad & Tobago and I am looking for someone competent with nRF9E5 to develope a wireless potentiometer position sensor with LCD receiver display for my company. IC of interest Regards Bernard Britton Expanse Ltd 18687869597 expanse@tstt.net.tt

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4

## reuse_TX_PL command timing diagram

Hi all,

I'm trying to use NRF24L01, using REUSE_TX_PL command, the data sheet says as long as CE keep high, the chip will transmit the payload continuously, what i wondering is whether there is a delay between packet frame ... (more)

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## Can't get nRF51822 examples installed

I've got an nRF51822 development kit that I'm trying to get started on. I've gone to Kiel and downloaded uVision 4 (mdk472_a). I install it with all default settings and it seems to install just fine.

I ... (more)

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## SPI returns 0x0F on any request after random period of time [closed]

Hi, im using nRF24L01+ to constantly transmit data and all working fine, but at some point SPI fails and the only returned values I get are 0x0F - doesnt matter which register I try to read or write. Any idea why ... (more)

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1

## Soft Device app_timer lib : what is the maximum number of timers

Dear Nordic support team,

What is the maximum number of timers that I can create (and use) using the app_timer lib?

    err_code = app_timer_create(&m_timer_m_1_0,
APP_TIMER_MODE_REPEATED,
timer_m_1_0_timeout_handler);


I have tried to initializate 10 timers this morning which are not all involved ... (more)

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## nRF51822, max IO pin voltage while off?

To be more detailed:

One of my ADC pins will be connected to another device that could be providing a voltage of about 3V, but through a 100 kohm resistor. (actually it's 6V, with two 100 kohm resistors as ... (more)

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## Can I use nRF24L01+ with pic? is there any library?

Hi there. We are developing an IoT device (we are planning to use nRF24L01+) we would like to implement with microchip uC, the question is if there is a library available for CCS or MPIDE, or any other C compiler ... (more)

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1

## No CPU DLL specified under 'options for target - debug' !

Hello. I am a starter

Keil say : No CPU DLL specified under 'options for target - debug' !

What I can do.

653
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## ANT HRS demo using UART RX

Hi,

I add UART support using IRQ on the "ant_hrm_tx" example code.

and I'm sending packet of 4 bytes that contains: Delimiter,HeartRate,Battery,Delimiter

the frame is very basic and send every 1000ms from another MCU.

the problem ... (more)

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## Strange beahaviour with size of 'manufacturer data'

I was unaware that the 'manufacturer data' in the advertising packets is limited to less than a full payload. However, whenever I set it to >6 the program "crashes".


#define MANUFACTURER_DATA_LEN                7
...

adv_manuf_data_data ...
(more)

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## App stop working after breakpoint for code analysis

Dear Nordic Developer Zone,

Since I have implemented a timer with interrupt in my application, the debug mode if the Keil IDE stops working when I try to restart the code execution after a breakpoint for code analysis.

I am ... (more)

4k
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## RTC0, RTC1 and the app_timer with SoftDevice

Hi all,

I'm a bit confused. After going through available documentation, I thought I had understood that RTC0 was used by the SoftDevice, but that RTC1 was available to use how I liked. After going through the ble_app_template example ... (more)

1k
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1

## Using the "brown-out" detection feature in the nRF51?

Is there an example on how to set up the low-power detection to provide an interrupt to the CPU?

1k
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## How to translate the result from register RSSISAMPLE to the real RSSI ?

Hi, Thank you for your kindly help.

I have get the result from the register RSSISAMPLE. The result I get from RSSISAMPLE is like this:0x00000050. As you known, the result should be a negative number. So there must be ... (more)

1k
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1

## Why service discovery command of BLE takes a lot of time?

Hi, I am trying to test my UART using some simple loopback test, and I have noticed that the service discovery command of BLE will occupy the CPU a quite long time. I am just wondering if there is any ... (more)

1k
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1
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1

## More efficient way to change 'manufacturer data' in advertising packet?

Is it possible through the API/Softdevice to do one of the following:

• read out the current advertising data structure, change a the manufacturing data field, and write back; or

• only change the manufacturing data field directly

Currently I'm ... (more)

745
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4

## nRF8002 possible to broadcast indefinitely?

Hi, I am planning to use modules with nRF8002 in an indoor positioning application. The mobile devices that are to be located are continuously scanning for BLE devices and detect the module's advertisements. They do not actively connect, just ... (more)

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## Fun Game project : 2.4 Ghz RF / nRF24LU1 feasability ?

Hi, we would like to create a kind of game using 2.4Ghz emitters . The 2.4Ghz USB Dongle emits and the mobile phone detects the frequency + embed unique ID/code so we confirm if the person has been there ... (more)

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## the heart rate monitor demo

I'm a green hand HW Engineer.

I'm trying to compile, program, and run The Heart rate monitor demo though following the step in nRF51822_DK_User_Guide_v1.0.pdf .

First of all, I confirm that the hardware, wire jumper, and SEGGER ... (more)

4k
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## Setting a PASSKEY

Hello! I am trying to develop on the nRF51822 eval board as called PCA10001. The programming interface I use is uVision4 on win7.

I would set a static PASSKEY for the pairing process in the reference code "ble_app_hrs". I add ... (more)

490
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## Heart Rate Service hangs while debugging with eclipse on nRF51822 dev kit

Hi,

I set up eclipse according to n-AN29 and imported several of the example projects. The blinky_example project described in the nRF51822 dev kit user's guide works perfectly (I get blinking LEDs). When I try to use the heart ... (more)

993
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## Internal Temperature Sensor Details

I am looking for details on the internal temperature sensor on the nRF51822. I would like to use it to get a general ambient reading of the air around the device. Basically, I need to know if this temp sensor ... (more)

870
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3

## why are the random addresses the some?

hi everyone.now i am developing a project with nrf51822.i am using the PCA10000 dongle to see some information of advertising packages. i moved out and pluged in the PCA10001 many times,but the random address are the some ... (more)

261
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1

## Dose the SOFTDEVICE set the NRF51822 to be BLE_GAP_ROLE_PERIPH by default?

and can user change it?or the hardware does not support BLE_GAP_ROLE_CENTRAL?

396
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## what kind of GAP Address type does BLE_HRS demo use?

i searched many many times,and i can get the anser.what kind of GAP Address type does BLE_HRS demo use.can someone tell me?tks!

590
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1
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1

## Problem using multiple GPIOTE users

I tried changing the define below from 1 to 2, so I could have one handler for a button and a different handler for other sensors. But my problem is: 1. If I set it to 1, the button handler ... (more)

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