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21,765 questions

487
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Last activity 2013-08-17 16:52:43 +0200 by Morgan Redfield

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)

852
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5
votes
2
answers
Last activity 2013-08-16 14:48:53 +0200 by Bryan

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)

829
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no
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3
answers
Last activity 2013-08-16 12:10:59 +0200 by andy2003hunan

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)

257
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1
answer
Last activity 2013-08-16 10:36:51 +0200 by andy2003hunan

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?

389
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no
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1
answer
Last activity 2013-08-16 08:34:01 +0200 by andy2003hunan

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!

2.png

575
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1
vote
1
answer
Last activity 2013-08-15 18:19:15 +0200 by Guilherme de Paula flag of United States

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)

1k
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7
answers
Last activity 2013-08-15 14:25:20 +0200 by Stanley

"Error - flash download failed - Cortex M0 [closed]

I get following message when I try to program with the Blinky project a nrf51822 chip: "Error - flash download failed - Cortex M0.

What is wrong?

9k
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9
votes
2
answers
Last activity 2013-08-15 11:57:19 +0200 by dorafmon

What's the maximum of baud rate supported of UART? [closed]

Hi, I have been trying to maximize the baud rate of my uart module, I am using the app_uart layer to control the uart and I have noticed that in your implementation of HCI you have set the baud rate ... (more)

296
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no
votes
2
answers
Last activity 2013-08-15 11:03:34 +0200 by Peter Sztanek

nRF24L01P substitution

Hello,

I've developed a circuit with Mikroelektronika's nRF T click module. This module uses nRF24L01P but as I see I cannot order it because it is obsolete.

Should I use nRF24E1 or nRF24Z1 instead of it? In our ... (more)

3k
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4
votes
4
answers
Last activity 2013-08-15 09:36:57 +0200 by Joseph

S110 - Sending multiple notifications per connection event

Hello,

I have a couple of questions about sending multiple notifications:

1) I want to send multiple notifications (from same characteristic), is that allowed by S110 softdevice?

2) What is the maximum number of packets that S110 could process per ... (more)

1k
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2
votes
2
answers
Last activity 2013-08-15 07:36:42 +0200 by Alex

What could make BLE sample applications not work, but radio works ok?

Hi, got an interesting problem, this is on a custom board with nRF51822 QFAB that we are bringing up. The radio test (not using softdevice) works ok and produces strong transmit signal (as strong or even stronger than from the ... (more)

561
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1
vote
2
answers
Last activity 2013-08-14 15:01:44 +0200 by bvrm

Which protocol for low latency, low power, high rate motion tracking application?

Hi

my application is a 9-axis battery driven motion sensor with a data rate about 144 bit per packet at 1000Hz i have to transmit over air. Low latency (<10ms) is extremely important. The device must consume as low power ... (more)

367
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no
votes
1
answer
Last activity 2013-08-14 13:40:25 +0200 by Anand Patel

nRF8002 forcing to sleep

I have an ultra low power application that needs to broadcast it's proximity on a 1sec interval. However, about 75% of the day I would like the device to be powered down and not transmitting.. This should be controlled ... (more)

725
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1
vote
1
answer
Last activity 2013-08-14 11:52:59 +0200 by sd

Does the SoftDevice S110 support 'Direct Advertising'?

I'd like to use 'Direct Advertising' to get the attention of a Central (a specific one or any in range) when an event happens on the peripheral. Is this mode supported by the device / S110? If so, is there ... (more)

4k
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10
votes
1
answer
Last activity 2013-08-14 11:44:30 +0200 by Manuel Urfer

Bonding - difference between IRK and address in whitelist [closed]

Why some devices makes just an IRK entry in Whitelist of SDK and other put the address into? Is it possible to config which entry should be done?

2k
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2
votes
3
answers
Last activity 2013-08-14 08:30:09 +0200 by Nick

RAM Banks (RAM retention)

How are the four RAM banks divided up in the nRF51822? Is it an even split of the 16K total RAM (i.e. 4K per block)?

Furthermore, can I expect strange results if I turn on RAM-retention for the 8K ... (more)

825
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no
votes
1
answer
Last activity 2013-08-14 05:45:27 +0200 by yjpark

Modify clock in gazell on nRF51822

Hello, sirs.

My question is how to configure clock in gazell protocol on nRF51822

I look at the example gzp_dynamic_pairing but that does not have a code part of modifying clock.

I know defining SystemCoreClock on "system_nrf51.c" and i ... (more)

13k
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2
votes
12
answers
Last activity 2013-08-14 02:05:19 +0200 by yillkid

Keil toolchain/compiler configurations incorrect

Hi all

My target board is nRF51822, and I want to run the heart rate demo project, but a error message when I compile it :

[b]Build target 'nrf51822_xxaa_s110 (256K)' assembling arm_startup_nrf51.s... arm_startup_nrf51.s: error: A3903U: Argument '--pd' not ... (more)

1k
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1
vote
4
answers
Last activity 2013-08-14 01:08:15 +0200 by Bret Foreman

Implementing a mutex

I need a mutex and I found this information at the ARM site: http://infocenter.arm.com/help/index....

Is there anything I should be aware of in using this technique to implement a mutex?

1k
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no
votes
2
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Last activity 2013-08-13 20:01:26 +0200 by Shane

Python scripting with master emulator to make sniffer

Hello,

I would like to build a tool in Python that allows sniffing/interaction with BLE traffic between nRFgo modules (nRF51822) and a Mac via the master emulator. I am looking for an alternative to using an iOS device simulator ... (more)

996
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no
votes
1
answer
Last activity 2013-08-13 17:17:19 +0200 by acmarkham

RSSI

I want to get RSSI between PCA10001 and PCA10000. As you known, I have to make these two device connected first. If I write my code based on the example of UART, are these two device connected? What is more ... (more)

1k
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no
votes
2
answers
Last activity 2013-08-13 17:12:10 +0200 by acmarkham

UART EXAMPLE

I have download the given software about UART to my nRF51822-EK. But it didn't work. Do I need s110 or not?

272
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no
votes
1
answer
Last activity 2013-08-13 17:09:16 +0200 by acmarkham

download problem

When I use keil to download the software to the chip, there are two questions: 1. like attached. 2.NRFGO CAN'T SEE J-LINK LITE CORTEXM BOARD Is there any way to solve these problem? Many thanks

捕获1.JPG

捕获2.JPG

406
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1
answer
Last activity 2013-08-13 14:05:57 +0200 by steven

Measurement custom hardware transmitting power

hi, Now,my pre-Develop product(BLE),that to measure the Tx transmit power not correct with my setting(default 0dbm). so,i have program a project for to sure the reason(Hardware or others)?

Have a project for measurement transmitting ... (more)

1k
views
no
votes
5
answers
Last activity 2013-08-13 13:41:27 +0200 by Godric Goodrich

BLE masteremulator.dll - Problem with masteremulator. bond() method

Hi,

I have been experimenting with the master emulator .dll - I started with the HidDemo project which is written in C#. This seems to work perfectly well.

I have rewritten ( translated ?) the demo code into VB.NET ( Visual Studio Express ... (more)

540
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no
votes
1
answer
Last activity 2013-08-13 13:25:20 +0200 by Nils Minor

Ho to change power off mode?

Hi,

how can i change that my programm doesen't go to power off mode? I use the ble templete.

Best regards Nils

607
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1
vote
1
answer
Last activity 2013-08-13 11:56:55 +0200 by Nils Minor

How to use app_timer_cnt_diff_compute

Hi,

i need to handle a button detection Time, i mean when i push the button for 2 seconds something should happen. How can i use the app_timer_cnt_diff_compute function for that?

Best regards Nils

816
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no
votes
2
answers
Last activity 2013-08-13 10:23:51 +0200 by Guest

Sample QDEC (quadrature decoder) code?

Can someone point me to sample code exercising the quadrature decoder found on the nRF51xx series (or something similar). Thanks!

218
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no
votes
1
answer
Last activity 2013-08-13 07:52:50 +0200 by Dave

nRF8001 Handshaking issue.

I a writing my own interrupt and DMA based code for sending commands and getting events from the nRF8001. The 8001 creates an event for every command, but if you want to clock out an event with dummy MOSI data ... (more)

1k
views
1
vote
3
answers
Last activity 2013-08-13 07:50:18 +0200 by Andrey

nRF8001 What is the maximum data rate with peered device?

As stated in standard the maximum data rate is 0.27Mbps. So is that is true for nRF8001 ??

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