# 21,591 questions

551
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2

## [nRF51822] Fast data rate at BTLE HID

I want to quickly transfer data between nRF51822 and celluar phone. The data rate is 100 packets/sec. Packet size is 14 bytes. We know mouse can reach almost 200Hz report rate. So, can I claim nRF51822 as a HID ... (more)

211
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1

## [nRF51822] Access control system

Hi We know most of access contol for entrance was implmented by RFID. Is it feasible to design it by BT4.0? My idea is as below. Thanks for your comment.

1. There is a BTLE device (nRF51822) installed in the ...
(more)

413
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2

## Evaluation kit PCA10001 V1.0 2012.35 user guide

I'm usually cleaning out the older manuals when downloading new ones from the web site. Unfortunately the new EK user guide 1.2 doesn't show how to connect the nrf51822 UART to the SEGGER serial port for my ... (more)

1k
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3
3

## Soft Device and Timers - how do they work together?

Hi all, I'm using Timer2 while having the SD enabled, and I'm having some problems. I don't seem to be able to reliably set the periodicity of the timer. No matter what I load in the CC ... (more)

326
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no
1

## Sheduler and Idle loop

I would like to use an idle loop for non critical tasks. Is there any way this can be done with the scheduler implementation? I don't want this to be time based, I just want my code to run ... (more)

185
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1

## I can not find the link to by nRFready Desktop 2 Reference Design,can you help?

just want how can I buy it online

254
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2

1k
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1

## sd_power_system_off()

Hi all,

I am using PCA10004 with s110_6.0.0-5.beta and sdk_v5_0_0_34603. I noticed that executing the command "sd_power_system_off()" does not switch-off currently active LEDs. Is it normal behavior of the nrf51822? Мy expectations were that all active peripherals ... (more)

268
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1
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1

## the use of char function in the 51822

Hi, I want to read the data by the radio.now I have read the temperate data from the tags by 51822. the data include the ID value and the temperate value. the ID is hex ,I must transfer them ... (more)

643
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5

## Should I migrate to SDK5.0.0 for project based on SDK4.2.2 & Softdevice S310?

Hello,

I am developing a project using nRF51922 and S310, and the project is built using SDK4.2.2 with the modifications mentioned in a document called "nRF51922 - ble application porting.pdf".

We know we have to switch to nRF51422 ... (more)

911
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1

## I want to pause the radio in a short time，because i want the uart receive data without error。

Hi，

I want to use the BLE SoftDevice without any flow control and the baud rate higher than 9600. In this question say this could lead to lost bytes from the UART peer to the nRF51822.

but ,can i pause ... (more)

202
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3

## how to construct rfid network

I have worked with nrf24l01+ devices. In my project include single PRX with 100 PTX. Objective of this project is all PTX send packet to one common PRX device & PRX send ack to all PTX after get the packet. how ... (more)

505
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1
vote
1

## current too high

Hi everyone

I'm using the nrf51822 connect with  stm32f103 through UART,it's current is >1.9mA,is it normal?


I have full reset to disable the debug interface,it can reduce about 0.2mA,when advertising it's ... (more)

331
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1
vote
1

As the topic

316
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1

## can't get nothing to work, at a loss here. Errors everywhere, versions not correct

Hello developers,

I've got an nrf51822 EVA kit with on it the QFAACA chip. KEIL v5.0.5, J-link V4.78, nRFGo Studio V1.16 and nrfGo SDK (zip) V4.4.2. The Softdevice on the Dongel and the ... (more)

775
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no
3

## Low Power Comparator

Hello,

I'm working with nrf51822 on a custom board and i'd like to use the LPCOMP as wakeup source. I configured the module by the code listed above:

void lpcomp_init(void) { NRF_LPCOMP->PSEL = 0x00000000; NRF_LPCOMP->REFSEL = 0x00000006; NRF_LPCOMP- ... (more)

344
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no
1

i'm testing in my pcb. i designed a nrf24le1f board (the guidance of the datasheet). But i transmitted not far, about 2-10cm a long. I don't know i wrong in design pcb or firmware. you can help me ... (more)

918
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3

## The NRf51822 ek not work on mac 10.9

I install the j link driver for mac(4.78k),connect the ek,but can't recognition it:

Sens-Macbook:~ sen\$ JLinkExe -if SWD -device nRF51822 SEGGER J-Link Commander V4.78k ('?' for help) Compiled Dec 5 2013 20:33:05 Can ... (more)

738
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1

## Did I brick my board ?

I have nRF51822-EK I am not sure whats going on with it.

I can run LED blinky example nicely ( no surprise :D )

But when I try to run softdevice examples like heart rate, proximity etc its not working.

I programmed ... (more)

7k
views
1
vote
2

## How to start with nrfStudio, Keil Uvision, IAR embeddworkbench [only windows 8]

Hi All, I am a beginner with nordic nrf 51822. I am confused between so many code development tools.I have a usb based nrf 51822 development board. I prefer to use microsoft WINDOWS 8 as development environment. Kindly help ... (more)

1k
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2

## BLE advertising using softdevice and heart rate sensor example [closed]

My question is regarding the adertising with the softdevice on the heart rate sensor example.

My starting point is the following: 1. I connect PCA10001 / PCA10000 from Evaluation Kit to usb 2. Using nRFgo Studio 1.15.1.2691 a ... (more)

396
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1
vote
1

## Eclipse Target Options and Debugging

I have used TI Code composer which is based on Eclipse, and they created a specific Target menu option which allows resets and other target specific items.

Is there a CDT plug in that gives similar features for the Arm Cortex/Nordic chip?

5k
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2
1

## ADC Reference Selection nRF51822 [closed]

I am completing a schematic using the nRF51822 part. I will be supplying the part with a 3.3V supply. I will use one of the ADC inputs to sense battery voltage (up to 10v max and 4v min). A ... (more)

279
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1

## Why does this phrase return 0x00000001?

err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME)); APP_ERROR_CHECK(err_code);

2k
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7

## Qualified Design Listing and required Testing

Hi,

Does hardware that has already a Qualified design Listing (Bluetooth.org) requires re-testing of the RF-PHY ? (refering to transmitter tests (i.e TRM-LE/CA/01/C (output power at NOC) )

Thx.

patrick

757
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1
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1

## What the difference between SMP request and pairing request?

Hi guys,

I am really confused to distinguish SMP request from pairing request. 1. Could you kindly what the difference? 2. Device(nRF51822) can send SMP reqeust? If yes, what function(API) is supposed to do?

Could you?

Best regards, YS Kim

1k
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no
2

## How do I use PPI channel groups?

My question is regarding the PPI channel groups. The documentation is extremely limited and leaves many questions.

My goal is to generate 3 PWM signals from a timer with no IRQ handler. I have 3 PPI channels setup to a ... (more)

503
views
1
vote
2

## Heart Rate Monitor demo is not working?

Hi,

I follow steps in User Guide version 1.2. The Blinky project is working fine. Then I program SoftDevice and after than compile and Download HRM using Kail But led 0 is not blinking I pressed button 0 or ... (more)

304
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no
1

## No discovery with sample heart rate app

Hi,

I am using the nRF51822 evaluation kit, and have been unable to get it working. I compiled the sample BLE Heart Rate sensor program and uploaded it to the evaluation kit board, but the provided dongle (accessed through the ... (more)

1k
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1
vote
1

## Debugging in nRF51422

Hi all, I am in the process of debugging the ANT broadcast_tx example program using Keil on nRF51422. I have flashed the program on nRF51422. After entering the debugging mode and doing a line by line execution process i am ... (more)

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• Resolved questions: 9148
• Total questions: 21591

## Recent blog posts

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