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27,747 questions

647
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1
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Last activity 2014-04-10 22:37:58 +0100 by Paul Loftsgard

Limiting advertising channels

Is there anyway to limit the number of channels a device is advertising on?

I'm using an nrf51822 with the S110 stack and want to limit my device to a single advertising channel (just 37, instead of 37, 38 ... (more)

683
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no
votes
7
answers
Last activity 2014-04-10 15:45:00 +0100 by Nestor Matas

Compatibility table for nRF51422

Is there any compatibility table for nRF51 series chips with revisions, softdevice versions and SDK versions?

I have some custom boards with a module that contains a nRF51422 CEAA A0 (0x0031) and although I can reprogram the softdevice downloading the ... (more)

269
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no
votes
1
answer
Last activity 2014-04-10 14:23:43 +0200 by kk

can not creat my own characteristic

HI ALL i have successfully creat my own service referring to the example ble_app_lbs and reference nAN-36. but when i tried to creat my own characteristic in my service, it did not wrok(the device became unable to advertise, and ... (more)

898
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no
votes
2
answers
Last activity 2014-04-10 14:07:51 +0100 by Julian

ULINK for nRF51822

I posted this on the Keil website, but got no answers! I would like to use one of my ULINK 2 pods to develop my application. However the Keil interface defines a reset connection. As we all know, the nRF51822 ... (more)

509
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no
votes
2
answers
Last activity 2014-04-10 08:06:24 +0200 by jimlin

How to send LL_CONNECTION_PARAM_REQ from slave

Hi,

I want to change the GAP params such as connInterval, slaveLatency, and have some questions:

1.can I call sd_ble_gap_conn_param_update directly or need to send LL_CONNECTION_PARAM_REQ first and wait for the BLE_GAP_EVT_CONN_PARAM_UPDATE event? a. If need to send LL_CONNECTION_PARAM_REQ ... (more)

576
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no
votes
2
answers
Last activity 2014-04-10 05:34:59 +0100 by aaronxu

How to migrate FATFS on nRF51822?

I want to store data more than one page on flash, and modify it very often.

pstorage or Fatfs? and how?

Thank you!

2k
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no
votes
2
answers
Last activity 2014-04-10 01:37:23 +0200 by sashi

nrf51822 low voltage mode, can't program part

Attached is the schematic of my part configured for low voltage mode.
Very close to page 62 in the nRF51822 product specification document. I am externally feeding 1.8V to the nRF_VDD18 rail. (the 1.8V rail is clean)

I ... (more)

1k
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no
votes
1
answer
Last activity 2014-04-10 01:23:24 +0200 by Cameron Tacklind

Can you use two GPIOTE channels for the same pin?

I'm trying to output a relatively high frequency PWM (300kHz). I'll need to adjust the duty cycle on the fly, without glitches and minimal time spent in IRQ handlers.

Currently, I have 2 compare matches setup on a ... (more)

495
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no
votes
1
answer
Last activity 2014-04-09 22:24:35 +0100 by Anders Nelson

Do I need VID/PID for BTLE HID?

Hey all,

I've created HIDs using USB before which require a vendor ID (VID) and product ID (PID). Are these necessary when creating a device that uses HID over BTLE? If so, can Nordic provide an ID pair?

=]

198
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no
votes
1
answer
Last activity 2014-04-09 22:09:56 +0100 by Yi Su

nRF51822 custom board stop transmitting after a while

Hi,

I am using a custom board with nRF51822 to transmit data. Everything works fine except the transmitting always stop after a while. I am using softdevice 5.2.1. I attach the log file from the Master Control Panel ... (more)

192
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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)

209
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no
votes
1
answer
Last activity 2014-04-09 18:21:24 +0100 by Antonio

make: *** [_build/app_timer.o] Error 1 (and SDK 4.4.2 vs 5.2)

I'm trying to build the ble_app_hrs example from Nordic's SDK on a Mac OSX 10.9.2 and have been following Nordic's nAN-29 Note v1.1 to install required tools, while looking for edits to make the ... (more)

416
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1
vote
2
answers
Last activity 2014-04-09 17:23:29 +0100 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)

751
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1
vote
2
answers
Last activity 2014-04-09 17:09:08 +0100 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)

3k
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)

311
views
no
votes
1
answer
Last activity 2014-04-09 16:36:39 +0100 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)

885
views
4
votes
1
answer
Last activity 2014-04-09 15:26:47 +0100 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)

288
views
no
votes
1
answer
Last activity 2014-04-09 15:06:17 +0100 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?

382
views
1
vote
1
answer
Last activity 2014-04-09 13:32:23 +0100 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)

187
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no
votes
1
answer
Last activity 2014-04-09 13:06:12 +0100 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)

225
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no
votes
3
answers
Last activity 2014-04-09 12:04:06 +0100 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.

161
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no
votes
1
answer
Last activity 2014-04-09 11:46:14 +0100 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)

803
views
no
votes
8
answers
Last activity 2014-04-09 11:12:24 +0100 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

233
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1
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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)

2k
views
no
votes
1
answer
Last activity 2014-04-09 08:31:04 +0100 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)

541
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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)

6k
views
4
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)

479
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no
votes
1
answer
Last activity 2014-04-09 02:48:38 +0100 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)

894
views
1
vote
1
answer
Last activity 2014-04-08 22:56:09 +0100 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)

136
views
1
vote
1
answer
Last activity 2014-04-08 22:31:04 +0100 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)

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