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Last activity 2015-04-22 02:38:43 +0200 by Cory Mast

Preventing Services From Being Discovered

Hello,

I am currently working on a project and I would like to add some security to my device by preventing services from being discovered. Ideally when a user connects to the device they should only see a Password service ... (more)

17
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no
votes
2
answers
Last activity 2015-04-22 02:16:19 +0200 by shinho

how to upgrade nrf51822-beacon kit using nrf51-dk

Hi, I bought the nrf51822-beacon kit and nrf51-dk including TC2030-CTX-NL connector for connecting them each other through the Debug out pin on the nRF51-DK.

I can't find right source code and don't right compile way using the Keil-uV ... (more)

4
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Last activity 2015-04-22 02:00:14 +0200 by Wass0392

Data Transmission Fault

Hi there

I started with an empty ble_template and added my own custom service emulating the batterey service, with all the same functions etc. Using master emulator i can see the characteristic increasing and decreasing just like the batterey service ... (more)

11
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Last activity 2015-04-22 01:06:49 +0200 by Kosidinma

App timer limit

Hi, I'm using a simple timer with interval set using "APP_TIMER_TICKS(1.4, APP_TIMER_PRESCALER)" alongside softdevice. Now i'm trying to get it to go faster but it would advertise for at most 3 seconds and then the system ... (more)

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Last activity 2015-04-22 00:39:25 +0200 by andre

Is there a sample program for beacon listener for nrf51 DK.

Is there a sample program for beacon listener for nrf51 DK.

3
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answers
Last activity 2015-04-21 23:56:47 +0200 by muhkuhns

nRF Master Control Panel Nexus 4 Mi Band

While I am waiting for my hardware I wanted to test the control panel with my Xiaomi Mi Band.

But I only get a single horizontal line in the RSSI Graph..

As I read this: Known problems: - Nexus 4 and ... (more)

85
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no
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3
answers
Last activity 2015-04-21 23:34:19 +0200 by Yasmine_Chtourou

SPI master on nRF5122

I'm using nRF51822 SoC and I have a LIS3DSH accelerometer connected to the ship via SPI bus . I used the SPI master example . So i used the switch_state() function then took the rx_data and tx_data . But when debugging the ... (more)

31
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2
votes
2
answers
Last activity 2015-04-21 22:19:49 +0200 by Nikolaj flag of Denmark

Can VDD be measured? (without routing it to an GPIO)

No text. It's a really short question.

30
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no
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1
answer
Last activity 2015-04-21 20:45:03 +0200 by Sarah

nRF51822 Beacon Kit Application Update DFU Error on Android

Hi,

I just wanted to try out the DFU on the Android app to see if I can successfully update the application on the beacon. For that, I only uploaded the precompiled nrf51822_beacon_app.hex as an application and did not ... (more)

39
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1
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1
answer
Last activity 2015-04-21 18:53:52 +0200 by mnhs

How to compare power consumption of 433 MHz and 2.4 GHz?

When i google for power consumption 433mhz 2,4ghz and similar most results tell me that 433MHz consumes less power... but when I look at specifications of explicit chips/modules I can't seem to find a 433MHz module that ... (more)

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Last activity 2015-04-21 18:39:54 +0200 by Rick.Soza

Multiple Gazell networks in close proximety

We are using Gazell to stream data at <=6mS intervals for very low latency wireless gaming peripherals. We'd like to have many of these peripherals devices (more than 24) located in the same proximate area, each talking back to ... (more)

21
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1
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1
answer
Last activity 2015-04-21 18:34:57 +0200 by mnhs

nRF51 DK - Keil licensing [closed]

Hello, I've just purchased an nRF51 DK and installed the SDK. I have Keil uVision 5 installed from a previous project, with a "Freescale Only" license key. This seems to be keeping me from compiling for Nordic; I get ... (more)

13
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answers
Last activity 2015-04-21 17:28:07 +0200 by vishal_a

does power_manage function affect debugging?

power_manage function is required always? Or its required if i want to go in the low power Mode?

Can i comment out power_manage during development stage?

135
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no
votes
1
answer
Last activity 2015-04-21 17:00:38 +0200 by cocoa

Star Network 4 peripherals 1 central - best SoC for this? 433 MHZ? 2,4 GHZ?

Hello everyone!

Just have a look at this beautiful drawing. (Red: what has to be done. Black: Can it be done this way?) image description

I only have some rudimental experiences in microcontroller programming and none with bluetooth stuff.

For a part ... (more)

37
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3
votes
2
answers
Last activity 2015-04-21 16:52:29 +0200 by David Edwin

To add firmware revision in advertisement packet

Hello Everyone,

I want firmware revision to be added in advertisement packet how can i do it . is it ok to add it to manufacturer data or it is nordic proprietary .

i have done it like this. to add firmware ... (more)

23
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votes
2
answers
Last activity 2015-04-21 16:43:42 +0200 by Glenn

convert softdevice 110 example project to softdevice 310?

Hello,

I know I have seen the topic on the forum, but can not find it. What changes need to be done to a example project designed for a softdevice 110 to convert it to a softdevice 310?

Thank You, Glenn

9
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answers
Last activity 2015-04-21 16:21:41 +0200 by BTprogrammer

Example for using S120 as peripheral?

Hello,

currently I am using the S110 Softdevice with the ble_template example as peripheral. This works fine.

For our final application, we need the central feature with up to 8 connected peripherals. Therfor I want to use the S120 softdevice ... (more)

14
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answers
Last activity 2015-04-21 16:04:58 +0200 by muhkuhns

Less power usage: SPI or I2C?

1 sensor per nRF51288.

Sensor supports either 400kHz I2C (10k pull up recommended) or SPI (2MHz typ, Max 20 MHz)

In the nRF51288 Product Specification the

Run current for SPI master at 4 Mbps. 200 μA

Run current for TWI ... (more)

29
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votes
1
answer
Last activity 2015-04-21 15:56:23 +0200 by Stefan Birnir Sverrisson flag of Iceland

nrf51822 beacon and SDK 8.0.0

Hi,

any plans to release firmware package for nrf51822 smart beacon using Soft device 8 and SDK 8? Thinking I better ask before I start adapting it on my own.

thanks, Olov

57
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no
votes
2
answers
Last activity 2015-04-21 15:43:50 +0200 by Texton

nRF51 crashes on startup in Eclipse?

Hi all,

I've spent 4 days now (!!) on getting a "Hello World" project to work in eclipse with GCC. I guess something around the startup-code is setup wrong in my very simple project but I don't know what ... (more)

55
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5
votes
2
answers
Last activity 2015-04-21 15:12:02 +0200 by Stefan Birnir Sverrisson flag of Iceland

Logging realtime sensor data to flash

I would like to know if it is possible to log realtime sensor data to flash while advertising. I would like to have a device which transmits real time ECG data over ble UART to an android device when in ... (more)

37
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no
votes
2
answers
Last activity 2015-04-21 14:52:59 +0200 by guillermo

nrf51822 not detected

Hello I have a nrf51822 mbed kit PCA 10024 V1.0.0. When I connect the kit to the PC (Windows 7 64 bits) the Mkit enumerates as an MSD named MBED:

I updated the firmware to version 2018following the ... (more)

32
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1
vote
1
answer
Last activity 2015-04-21 14:19:37 +0200 by Stefan Birnir Sverrisson flag of Iceland

DA14580 4.9 mA RX / TX at 3 V at 0 dBm output power

This is factor 2 to what I read here. How can they achieve this? Where is the trick? http://www.dialog-semiconductor.com/p...

13
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votes
1
answer
Last activity 2015-04-21 13:50:57 +0200 by Hung Bui

S120 Bootloader target options

Here Hung Bui (@hungbui) gave the good answer how to use bootloader with new S120 v.2.0.

I'm sorry, but can anybody check is I have a right settings on the Keil uVision options->target? Please note that ... (more)

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votes
2
answers
Last activity 2015-04-21 13:43:30 +0200 by Stefan Birnir Sverrisson flag of Iceland

Reading ADC value from analog input

Hello, I'm using nRF51822-mKIT for a research.

image description

To verify ADC readings from analog input, I've connected P0_5 to GND and ran the following code:

uint16_t adc_result;    

NRF_ADC->INTENSET = (ADC_INTENSET_END_Disabled << ADC_INTENSET_END_Pos);     /*!< Interrupt enabled. */

// config ADC
NRF_ADC->CONFIG = (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos ...
(more)

32
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votes
1
answer
Last activity 2015-04-21 13:20:28 +0200 by Hung Bui

concurrent characteristic write and notify

Hi,

I was just wondering what the sequence of events would be in the following scenario:

A S110 peripheral device (GATT server) has a characteristic with write access and notifications enabled (by the GATT client). The GATT client performs a ... (more)

460
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3
votes
2
answers
Last activity 2015-04-21 13:13:30 +0200 by Stefan Birnir Sverrisson flag of Iceland

How to program the Smart Beacon Kit.

I have looked over the entire site and can not figure out what is needed to change the Smart Beacon Kit firmware and uploaded it to the beacon.

Is there a way to recompile the source firmware (what tools do ... (more)

26
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no
votes
1
answer
Last activity 2015-04-21 13:05:06 +0200 by Martin Børs-Lind flag of Norway

How much mechanical stress can the nRF51288 ( PTR5528 ) take?

For my project I would like to use this bluetooth module: http://freqchina.en.alibaba.com/produ...

Does it resist 4 bar pressure? Does it resist circular motion > 100 rounds/second (radius 7cm)? (And how does that may effect the bluetooth signal..?)

30
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votes
2
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Last activity 2015-04-21 13:04:23 +0200 by Hung Bui

vendor UUID

I am trying to connect to a peripheral through s120 central and vendor has a 128 bit fixed UUID

I am trying to add it on central using sd_ble_uuid_vs_add(...,...) but it is not working and everytime I am getting charachtreristics ... (more)

19
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1
vote
1
answer
Last activity 2015-04-21 12:43:03 +0200 by Stian flag of Norway

mbed with custom pcb

Hey,

For my project I wrote and tested (w/ nRF51 DK) all firmware in mbed. I also made a custom PCB w/ the nRF51822 CEAA chip based on the 4 layer reference design provided by Nordic.

The problem comes when ... (more)

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