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22,463 questions

403
views
1
vote
2
answers
Last activity 2014-04-09 17:23:29 +0200 by mst

ANT multi-hop broadcasting network

I'm assessing whether ANT is suitable for the network deployment I have in mind, and I would appreciate to hear any thoughts you have on this.

I have a network of say 20 nRF51422 nodes. On a regular basis ... (more)

733
views
1
vote
2
answers
Last activity 2014-04-09 17:09:08 +0200 by balaji

current cunsumption on advertisement

Hi,

I need help on calculating the current consumption of our device when it is in advertise mode. So please answer the below questions.

What are all the significant parameters decides the current consumption on advertise?

Will maximum transmission power ... (more)

2k
views
no
votes
4
answers
Last activity 2014-04-09 17:02:49 +0200 by pascal defesche

Capture timer value

Hi,

i want to start timer 2 and read its value just before the radio gets active. I've seen in the nr51 series reference manual i can use task capture to set the current count value in CC register ... (more)

302
views
no
votes
1
answer
Last activity 2014-04-09 16:36:39 +0200 by Christoph Inhestern

Problems after switching Project to SDK 5.2.0

Hello, I'm trying to get my nrf51822 project from SDK 5.0.0 running in the latest SDK 5.2.0. To minimize problems with KEIL I used the template project and copied my sources into this. After some ... (more)

771
views
4
votes
1
answer
Last activity 2014-04-09 15:26:47 +0200 by Joseph

I2C bus with no external pull up

Hi,

We are using nRF51422 in our project and we observe a strange thing, that even there is no external pull up resistors, the I2C communication using the built-in TWI port is still working fine, I would like to check ... (more)

283
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no
votes
1
answer
Last activity 2014-04-09 15:06:17 +0200 by gootoomoon flag of China

Can I use ADC for voltage comparator ?

We need func of voltage comparator in our project ,can I just use ADC to achieve this?

373
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1
vote
1
answer
Last activity 2014-04-09 13:32:23 +0200 by davman

SoftDevice API header files vs. nrf51 SDK version

Been studying the S110 5.x -> 6.0 migration docs. Are there any project-specifics / include-paths / Keil build-settings that must be updated as well?

Do I understand it correctly that latest v5.2.0 that ends up here is for the ... (more)

183
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no
votes
1
answer
Last activity 2014-04-09 13:06:12 +0200 by Martin

How to get BLE SD free/used memory?

Hi, is there a function that returns free or used memory of the BLE SD? I'd like to know how much memory is allocated for added service and characteristic and make a guess how many services and chars I ... (more)

222
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no
votes
3
answers
Last activity 2014-04-09 12:04:06 +0200 by Andrew Frazer

Gazell protocols on the nrf51422?

I am wnating to clarify, if i can use the Gazell protocols on the nrf51422? I can't find it in the SDK for the 51422, but it is in the sdk for the 51822.

160
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no
votes
1
answer
Last activity 2014-04-09 11:46:14 +0200 by Martijn

Nordic Tech Tour 2014 Eindhoven

Hello,

I am thinking about going to eindhoven the 20th of may for the nordic tech tour presentation. My main interrest is the new v7.0 S110 softdevice which is to be released in may and the NRF51822 newest hardware ... (more)

746
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no
votes
8
answers
Last activity 2014-04-09 11:12:24 +0200 by aaronxu

How to test BLE keyboard on iOS7?

Hi all,

I noticed that there are some instructions for testing keyboard on win8.1 or USB dongle. Can I test it on my iPhone5s which is iOS7.0.4 now?

Regards, Aaron

223
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1
vote
no
answers
Last activity 2014-04-09 10:33:24 +0200 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)

2k
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no
votes
1
answer
Last activity 2014-04-09 08:31:04 +0200 by Aksel Jensen

How to program a softdevice with Keil uVision?

Attempting to program a softdevice hex file using Keil uVision and an ST-Link V2, I get:

No Algorithm found for: 10001000H - 10001013H

This is in the UICR (User Information Configuration Registers), which should be programmable like code according to the ... (more)

498
views
no
votes
3
answers
Last activity 2014-04-09 06:29:56 +0200 by Andrew Frazer

Radio "Channels"

Hi, If i am running 2Mb radio channels, how many can i have operating in the 2.4Ghz space concurrently?

ALso, what mechanisms can be employed to detect and move frequency if there is interference on your channel in an ... (more)

5k
views
3
votes
7
answers
Last activity 2014-04-09 04:13:21 +0200 by mahone

About sleep mode

Hi,

I'm confused with the functions (sd_power_mode_set and sd_app_event_wait). 1.I think there are described with the same function.I can't tell the difference between this two.And I can't find the function that is used to ... (more)

449
views
no
votes
1
answer
Last activity 2014-04-09 02:48:38 +0200 by Eliot Stock flag of United Kingdom

Is it possible to use the UART without the Soft Device?

There are some include dependencies that go like this:

app_uart.h -> app_util.h -> app_error.h -> nrf_error.h

and nrf_error.h is under Include/s110.

In order to debug some stuff happening with my UART peripherals, I'd like to do ... (more)

777
views
1
vote
1
answer
Last activity 2014-04-08 22:56:09 +0200 by s. hoang

Single vs Dual Bank Bootloader

Can someone explain the reasons/benefits of using the single vs dual bank BLE boot loader?

Actually, why isn't there a single bank BLE bootloader in the example project in SDK 4.4.2? Is there one added in ... (more)

134
views
1
vote
1
answer
Last activity 2014-04-08 22:31:04 +0200 by Robert

Dynamic connecting to the nearest central

Hello, i would like to make device which will be dynamically change connection with centrals. It should be connected to the nereast device (with the most power). So I will have several paired centrals. I suppose as perepheral my device ... (more)

415
views
no
votes
no
answers
Last activity 2014-04-08 21:08:35 +0200 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)

175
views
no
votes
1
answer
Last activity 2014-04-08 19:52:44 +0200 by Stavros Tsardounis

nRF8002 Output pins accessed from iPhone/Android

I am building a new PCB board for a prototype. It will be used for proximity. It will blink on low battery. It also has a piezo speaker attached to a pin as well. My question is this. Can I ... (more)

242
views
no
votes
no
answers
Last activity 2014-04-08 16:08:48 +0200 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)

329
views
no
votes
2
answers
Last activity 2014-04-08 16:01:53 +0200 by Joachim Schloz

GZLL Device Crypt, Host ??

We have a project for a sauna controllunit, A remotcontrolle and hostunit which controlles the sauna. The Device send comands to the host, the host sends Ack + Payload (the payload includes some informations that the remotconrolle needs to know). We ... (more)

411
views
no
votes
1
answer
Last activity 2014-04-08 14:37:21 +0200 by Adib

nRF51x22, Rx determine payload length

We start to migrate our equipment from nrf14L01 receiver to nrf51422 receiver in order to serve more equipment. I am using nrf51822 to receive propietary protocols from heart beat monitors using normal shock burst protocols (not extended shockburst). I am ... (more)

1k
views
1
vote
1
answer
Last activity 2014-04-08 13:17:08 +0200 by balaji

how to set the transmission power level?

Hi, We have a custom board with nrf51822 and we use chip antenna from ST BAL-NRF01D3, now the distance it support is very very short (less than 20 cm). So, please tell me, changing the transmission power level will increase ... (more)

1k
views
no
votes
4
answers
Last activity 2014-04-08 12:49:45 +0200 by Jarmo

S110 Soft Device and Analog Inputs

I have an application that reads an nRF51822 pin configured as analog input and then sends that value using "ble uart" (included in Nordic's sdk). Analog input is read in an interrupt 250 times per second, but only a ... (more)

181
views
no
votes
2
answers
Last activity 2014-04-08 11:42:39 +0200 by Andrew Frazer

Can't update nRFgo firmware, ( nrf6310 x 2 ) with nRF51422 Dev kit

Im stuck that i can't get my Motherboards to update. Just goes into an endless loop of saying toggle power to rest it, starting boo loader, Couldn't start.. etc etc..

Attached screen shot of what i'm seeing ... (more)

949
views
1
vote
1
answer
Last activity 2014-04-08 11:34:53 +0200 by balaji

GPIO Drive Current

Hi, Is it possible to control the drive current of the gpio pin? Can anyone explain the different possible drive configuration for gpio's (S0S1,H0S1, etc..)?

Regards, Balaji

411
views
no
votes
4
answers
Last activity 2014-04-08 10:41:31 +0200 by pascal defesche

S110 as scanner?

Hello,

I have some questions regarding S110:

1) Is it possible for the S110 softdevice to scan for broadcasts?

2) Is it possible to create a connectable broadcast? I only need to send 2 bytes of data, so can i ... (more)

502
views
1
vote
1
answer
Last activity 2014-04-08 09:36:05 +0200 by kevin chen

die temperature 51822

hi Ole Morten:

thank you for your great support.

i have tested nrf6310\temperature_example. at 30(Celsius)

I checked the data. NRF_TEMP=0x000002AF; TEMP=0xFFFFFFAC; what's the NRF_TEMP data type? 10bit 2's complement or 32bit 2's complement ... (more)

708
views
no
votes
1
answer
Last activity 2014-04-08 08:12:52 +0200 by Dmitri Vorobiev

LFCLK in nRF51822

Hello!

We are using a custom hardware design based on nRF51822. Recently we switched to the new chip version QFAAG0 with softdevice 6.0.0.

Our application needs a repeating timer with period of 5 milliseconds, for which we are ... (more)

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