RSS
Sort by » date activity ▲ answers views votes

3,814 questions

250
views
no
votes
no
answers
Last activity 2013-12-06 05:50:35 +0100 by Linda

the problem of 51822 and 24l01

Hi, In my design, there is a tag used by 24l01,It can transmit the temperature value.In the tag, the parameters are like this:


       addrofch[0] = 0xe7;          
    addrofch[1] = 0x7e;         
    addrofch[2] = 0xe3;         
    addrofch[3] = 0x0;          
    addrofch[4] = 0x0 ...
(more)

267
views
no
votes
no
answers
Last activity 2013-12-18 15:00:18 +0100 by Leon Schmetz

UART emits spurious zero byte

Hello,

I am working with the uart module. While configuring the uart I encounter 2 issues.

First when in the uart_init function the pin for uart output is configured, a zero byte is emitted. This also happens some time after ... (more)

224
views
no
votes
no
answers
Last activity 2014-01-08 18:01:40 +0100 by Alice

Maximum data rate for the nRF24AP2 when using the Synchronous serial interface

Hi all,

What is the maximum data rate for the nRF24AP2 when using the Synchronous serial interface? I cann't see it in the datasheet.

Is there anyone can answer me?Thanks.

177
views
no
votes
no
answers
Last activity 2014-01-15 12:58:21 +0100 by Ole Christian Tvedt

nRF905 timing requirements when auto-retransmitting.

Hi,

We are using the nRF905 device in an application where it needs to switch between auto-retransmitting and sending single packets, due to it communicating with several types of devices. To simplify the software design, we would like to not ... (more)

188
views
no
votes
no
answers
Last activity 2014-01-22 12:51:41 +0100 by sky

AP2 can't Responsed when transmitting a data packet to it

Hi,

 I transmit a data packet to AP2, i wonder if it needs a sequence for resetting  or not  while AP2

initializing.

 And, I  send a packet data to AP2 by UART(AP2 had been set in asynchronous mode)  ,such ...
(more)

1k
views
1
vote
no
answers
Last activity 2014-01-29 09:12:17 +0200 by balaji

Interfacing LCD display with nrf51822 evaluation board

Hi, I just started to interface the lcd display with nrf51822 evaluation board. The display i'm using is, spi compatible, 18" tft (160x130) from tiny lcd. I took spi master example as a reference code and modified it to ... (more)

229
views
no
votes
no
answers
Last activity 2014-03-05 19:49:08 +0100 by Eliot Stock flag of United Kingdom

float arithmetic confuses GDB

Why does this simple float arithmetic cause my GDB client to hang and my GDB server to say "GDB closed TCP/IP connection"? I'm sure I've got other float operations working just fine.

    float a, b, c;

    a ...
(more)

541
views
no
votes
no
answers
Last activity 2014-03-06 10:50:02 +0100 by Terry

nrf51822 UART Lost bit

Hi, I have a serious problem, when I use uart of NRF51822 QFAAC0 to receive data from another MCU, I found that it will lost one bit at same position everytime. my SDK is 4.4.2, and SD is ... (more)

453
views
no
votes
no
answers
Last activity 2014-03-14 16:09:31 +0100 by Virgil Gomes

Convert AN34 DTM Python script to C#

Has anyone converted the app note AN34 DTM Python script to C# or C/C++ ?

The Python DTM script is works OK with the setup specified in the app note AN34 figure 2, which is using the Nordic nRF DK ... (more)

310
views
no
votes
no
answers
Last activity 2014-03-18 14:58:37 +0100 by balaji

Service Discovery Fails on Nexus 4 Android application

Hi,

My android Proximity application fails on service discovery only for the very first time it connects with the devices(nrf51822 evaluation kit with sdk 5.2.0). Actually i am not getting onservicediscovered (onsearchcomplete from gatt) callback in log ... (more)

477
views
no
votes
no
answers
Last activity 2014-03-26 17:37:25 +0100 by Cyril Hruscak

RX/TX buffers in S110

Hello,

How many RX buffers are in S110 SoftDevice? I know there are 6 TX buffers (so you can send 6 packets per Connection Interval). How is it on receiving? Is it e.g. possible to send Read Blob Request ... (more)

258
views
no
votes
no
answers
Last activity 2014-04-01 22:39:56 +0100 by Mike

What does the SWI0 do and how is it used in app_timer?

I saw that the app_timer uses the SWI0. Could you explain what it does and what the advantage is compared to "timer_list_handler_sched()" calling "timer_list_handler()" directly?

209
views
no
votes
no
answers
Last activity 2014-04-01 23:33:44 +0100 by Nils Minor

Wake-up Times ?

Hi,

how long does it take time if i would wake up a nrf51422 rev2 (ANT and BLE) in deepest possible sleep mode ?

And how long does it tai if after wakeup it had to communicate to an other ANT ... (more)

409
views
no
votes
no
answers
Last activity 2014-04-02 00:50:28 +0100 by Mike

RTC clear event synchronised?

I want to count clocks in order to implement a watch. I use the RTC0 as my time-base and count mainly with this device. As it has just 24 bits it would not last for long, which is why I ... (more)

375
views
no
votes
no
answers
Last activity 2014-04-03 07:55:29 +0100 by Alexander Entinger

What elements of the over-the-air package are fed in which order and endianess into the crc module?

Hello,

In an ongoing company project we use a couple of nRF51 transceivers forming a beacon enabled wireless sensor network consisting of one base station and multiple sensor nodes. For our application it is required that we are able to ... (more)

865
views
2
votes
no
answers
Last activity 2014-04-03 13:09:18 +0100 by Dmitri

HardFault on sd_ble_gap_device_name_set call on custom nrf51822 board

Hi,

I've developed an application and tested it on the evaluation kit. Now i'm trying to run it on a custom board with a nrf51822 chip on it. I've made modifications to exclude evaluation board specific code ... (more)

352
views
no
votes
no
answers
Last activity 2014-04-03 15:29:14 +0100 by Akbar Dhanaliwala

ANCS Hard Fault

Hi, I've created an application using the S110 experimental ANCS demo. I successfully implemented ANCS and then began to structure my application around it. At some point I realized that my ANCS handler was causing a hard fault. The ... (more)

432
views
no
votes
no
answers
Last activity 2014-04-03 15:40:09 +0100 by Mike

Use nordic uart service with native Linux stack from Java

I'm looking for a way to use the nordic uart service (https://devzone.nordicsemi.com/docume...) from Linux using the native Linux BLE Stack (BlueZ). My application is written in Java. This way the communication would be possible with ... (more)

191
views
1
vote
no
answers
Last activity 2014-04-03 21:28:20 +0100 by Russell

New to Nordic and keil need help compiling custom project

new to nordic and keil need help compiling custom project currently my main file only works with the nordic 1822 series processor and in your example. I need to have it better packaged so I can archive it into our ... (more)

177
views
no
votes
no
answers
Last activity 2014-04-04 08:21:13 +0100 by Albert

nRF24LU1 programs a byte through spi command,a strange problem occured...

before i write the flash, it has been erased.so ,its value is all 0xff. when i write 0x00 to flash address 0x0001,the value read out is not 0x00 but 0x01,and the value in flash address 0x0000 is ... (more)

999
views
no
votes
no
answers
Last activity 2014-04-05 22:01:31 +0100 by julian

get BLE_EVT_USER_MEM_REQUEST and BLE_GAP_EVT_CONN_PARAM_UPDATE

I am getting get BLE_EVT_USER_MEM_REQUEST and BLE_GAP_EVT_CONN_PARAM_UPDATE event, when writing to ble device, sample code did not handle these event, and seems no document about what should we do about it, I also found

/**@brief Provide a user memory block ... (more)

206
views
1
vote
no
answers
Last activity 2014-04-05 22:49:49 +0100 by Barada Mishra

Has anybody used pervasive dispalay (repaper) on NRF51822 Evaluation Kit?

Has anybody got it working? I ported the EPD library from Adruino EPD libray but not sure where its going wrong.

283
views
no
votes
no
answers
Last activity 2014-04-07 03:34:24 +0100 by bugg

HOW do I erase SDK5.2 version of flash and read not, in SDK4.2 can.

Hello: Why do I erase SDK5.2 version of flash and read not, in SDK4.2 can. I tested nrf51_sdk_v5_2_0_39364\nrf51822\Board\nrf6310\flashwrite_example is a good example.However, I use the store will not work inside BLEļ¼ŒThis is ... (more)

159
views
no
votes
no
answers
Last activity 2014-04-07 11:53:06 +0100 by Elliot.Chao

One command execution time on serialization

Hi,

I use two evk board to connected and test the uart serialization sample(ble_s110_serialization), one is ble_app_hrs and one is ble_app_connectivity. But I have one question that need your confirm.

We want to compare serialization(51422 and 51822) and ... (more)

281
views
no
votes
no
answers
Last activity 2014-04-08 16:08:48 +0100 by mansfield

Control GPIO by PPI and timer1

I want to control GPIO toggle by PPI. Timer1 is in timer mode. CC[0] is 1000, and CC[1] is 8000. I use compare[0] to toggle gpio18 by PPI. I also want to use compare[1] to toggle ... (more)

464
views
no
votes
no
answers
Last activity 2014-04-08 21:08:35 +0100 by Kyle

Stopping app_timer (using app_timer_stop) results in too much current during ON,IDLE mode

I'm having some trouble successfully entering ON,IDLE mode. I have pared-down my application to do the following:

1) Initializes the app_timer using the scheduler:

APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);

2) Initializes the BLE stack and softdevice:

BLE_STACK_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION ... (more)

233
views
1
vote
no
answers
Last activity 2014-04-09 10:33:24 +0100 by balaji

nrftoolbox dfu application error

Hi, While testing the device firmware update through the nRFtoolbox android application, i get "device has no required service" error more frequently.

I use latest version of sdk for nrf51822 evaluation board and latest version of apk for Nexus 4 ... (more)

192
views
no
votes
no
answers
Last activity 2014-04-09 20:38:43 +0100 by Peeter Vois

Q about APP_TIMER_MIN_TIMEOUT_TICKS

I need to create timeout below 1ms. I would pretty much like to use timer for that because I do not want to hold the cpu inside cycle. For me it is not important the exactness of the time but ... (more)

318
views
no
votes
no
answers
Last activity 2014-04-11 01:26:08 +0100 by Charles Horkin

Performance of GATT

Is there a way to recieve more than one write callback for a given characteristic, per radio session? It seems like I can rx 1 time per attribute per radio session and tx up to 8 times per attribute per ... (more)

208
views
no
votes
no
answers
Last activity 2014-04-11 04:39:09 +0100 by mahone

About Acknowledge Mode

Hi,

I change the example ant_broadcast to acknowledge mode, but it seems that without a peripheral side,the LED0 will still twinkle.I don't know how to change the project so that only with a receiver will the sender ... (more)

Statistics

  • Total users: 25687
  • Latest user: Alanna Steil
  • Resolved questions: 11282
  • Unanswered questions: 3823
  • Total questions: 27855

User menu

    or sign up

Recent questions

Tags

Show all tags