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Last activity 2017-12-05 20:50:43 +0200 by AmbystomaLabs flag of United States

Connectivity issues in damp/wet weather

Looking for some advice on how to handle connectivity issues in damp/wet weather.

We've found that our NRF51 device works well indoors, but when placed outdoors overnight, the ability to connect to the device can fall to near ... (more)

21
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1
vote
1
answer
Last activity 2017-11-29 12:42:46 +0100 by Joakim Jakobsen flag of Norway

blinky bluetooth nrf51822

hi ;

I want to control led in my BLE nrf51822 using an android app someone can help me please

157
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no
votes
1
answer
Last activity 2017-11-27 14:25:11 +0200 by Joakim Jakobsen flag of Norway

bluetooth questions

heelo every one ,

i want to use bluetooth to connect my nrf51822 to my smartphone can anyone help me because i don't have any idea there is any example ready to use plz

83
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1
vote
1
answer
Last activity 2017-11-25 14:28:47 +0200 by mantap

how to use nRF51822 SDK for building connection between nRF51822 & ADXL345

I wanna build project nRF51822 using ADXL345 for accelerometer sensor that program using eclipse or keil. can you teach me how to build using nRF51822 SDK version 6 or higher... please teach me from beginning. I am newbie for this ... (more)

39
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no
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no
answers
Last activity 2017-11-23 03:35:04 +0200 by Motti Ng

esb handler crash

I am trying to use ESB and BLE concurrently on NRF51822 SDK v11 SD130.. The BLE part is working fine but the ESB part keep causing error randomly. I put a break-point in app_error_handler and found that this is related ... (more)

857
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no
votes
2
answers
Last activity 2017-11-20 14:26:35 +0200 by Adrien C.

nRF51 DK mbed I2C/TWI

Hi,

I'm currently building a BLE multi-sensors device, with mbed online IDE. I succeed in implementing BLE API, and releasing a first .hex firmware with multiple services and characteristics.

Now, I want to replace my fake characteristic values by ... (more)

40
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no
votes
1
answer
Last activity 2017-11-20 13:49:41 +0200 by Joakim Jakobsen flag of Norway

How to reinitialize advertising ?

Hello, I use nrf51822 , sdk 8.0.0, s110

I defined advertise interval and timeout

#define APP_ADV_INTERVAL                         320              
#define APP_ADV_TIMEOUT_IN_SECONDS      3

Also, I write advertising init function at below;

static void advertising_init(void)
{

   .
   .
   .

    ble_adv_modes_config_t options = {0};
    options.ble_adv_fast_enabled  = BLE_ADV_FAST_ENABLED;
    options ...
(more)

48
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no
votes
1
answer
Last activity 2017-11-16 11:13:22 +0100 by Kenneth

timer events triggered in a row

Hi

I seek your support for the following 2 app_timer (or else) issue:

(1) in there any reason as to why multiple app_timers will sometime trigger all in a row although they have very different timeouts?

My case is button ... (more)

57
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no
votes
1
answer
Last activity 2017-11-16 00:15:05 +0200 by Emil Lenngren flag of Sweden

How to make the device in the Apple phone settings inside the Bluetooth search and can connect

How to make the device in the Apple phone settings inside the Bluetooth search and can connect

39
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no
votes
1
answer
Last activity 2017-11-14 10:36:18 +0100 by fares elec

Undefined symbol nrf_drv_adc_sample_convert

I am getting following errors when compiling source code in Keil-5. Any one suggest me what i am missing to define symbol?

linking... ._build\nrf51422_xxac.axf: Error: L6218E: Undefined symbol nrf_drv_adc_sample_convert (referred from main.o). Not enough information to list image symbols.

136
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3
votes
2
answers
Last activity 2017-11-09 17:38:36 +0200 by Amigo flag of Russian Federation

nrf52822 iot mqtt implmention??

Hi,

We are able to interface nrf52822 with wiznet5500i.But We need help or how we will process further for mqtt AWS iot stack..

53
views
1
vote
1
answer
Last activity 2017-11-07 12:51:15 +0100 by fvisztra

nRF51 UART sends just 2 packets

Hi Guys!

I am a newbee to develop a BLE IoT, and I am really trapped: first of all: I am using the UART example from the SDK (12.2) I'd like to send a float array with 54 ... (more)

46
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2
votes
2
answers
Last activity 2017-11-07 12:11:43 +0200 by Stian flag of Norway

Send 16 bits instead of 8 bits over BLE

Hello,

I'd like to send 16 bits data over ble instead of 8 bits

gatts_value.offset = 0;
gatts_value.len = len;
gatts_value.p_value = data;

err_code = sd_ble_gatts_value_set(conn_handle, value_handle, &gatts_value);

for len I set the value to 2 and cast the ... (more)

46
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no
votes
no
answers
Last activity 2017-10-30 19:09:15 +0200 by B

Why is the function "gpiote_init()" conflicting with the bluetooth code?

Hello, I tried to add the code of the bluetooth tutorial called "Bluetooth low energy Characteristics, a beginner's tutorial", with a code that measures the delay of two forms of waves, but when debuging them together there is a ... (more)

47
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no
votes
no
answers
Last activity 2017-10-30 15:42:51 +0200 by abosch

Update firmware from flash

Hi all,

I'm using nrf51822, sdk 6.1 and s110 v7.1.

My idea is to use the GPRS module of my board to receive the new firmware (the module works with UART), save it to the flash(if ... (more)

76
views
no
votes
1
answer
Last activity 2017-10-26 15:15:23 +0200 by Sigurd flag of Norway

nRF 51822 Low power mode

Hi All,

I'm new to nrf51822. I'm developing a battery powered device using the Nordic ble_app_uart_s110_pca10028 peripheral example program. I'm glad to inform you my core program is working successfully. But now i'm facing a problem ... (more)

38
views
2
votes
1
answer
Last activity 2017-10-26 11:19:59 +0200 by Bjørn Spockeli flag of Norway

Adding newer SDK features to existing application in SDK v10

I am working on adding DFU, persistent storage and pair/bond feature to an existing nRF51 application, developed with SDK v10.0.0 running on SoftDevice S110 v8.0.0.

I looked over the SDK documentation a little and found ... (more)

48
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no
votes
no
answers
Last activity 2017-10-25 05:18:43 +0100 by misslove

Simulated I2C

HI! The use of simulation software I2C and the sensor module communication in my program, without the use of the protocol stack, the normal running of the program, but after entering the protocol stack, when I want to read the ... (more)

48
views
no
votes
1
answer
Last activity 2017-10-24 11:16:51 +0200 by Bjørn Kvaale

NRF51822 Sleep mode with High frequency clock

I am using NRF51822,S110,16Mhz XOsc. In this if Controller goes to sleep mode the current consumption is 4.9mA. In my application at sleep mode BLE should be connected and ADC runs at timer interval.Is it possible ... (more)

74
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1
vote
no
answers
Last activity 2017-10-23 16:25:25 +0200 by purgoufr

how to use Simple UART driver?

From the SDK8 s110 device, I want to send the string("hello") to the other device via the uart, and in the meantime I want the battery voltage to come through uart.

I defined ;

void uart_event_handle(app_uart_evt_t * p_event)
{
    static uint8_t ...
(more)

68
views
no
votes
1
answer
Last activity 2017-10-23 13:09:19 +0200 by Jørgen Holmefjord flag of Norway

Is it possible to use p0.8,p0.9,p0.10,p0.11 pin as gpio in Ble_app_uart_s110 program of nrf51822?

In nrf51822 Ble_app_uart_s110 program p0.8,p0.9,p0.10,p0.11 can't use as gpio pin. How to configure it ?

334
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no
votes
2
answers
Last activity 2017-10-23 00:03:07 +0100 by Daniel Sullivan

KEIL4 "No Jlink device found".

I have a nRF51-DK and SDK8+Keil5. I also have a module that sadly uses an old revision 1 nrf51822. It is connected via SWD to my nRF51-DK.

I could programm it with keil 5. I can programm it with ... (more)

42
views
2
votes
1
answer
Last activity 2017-10-21 17:10:55 +0200 by John Silver flag of Belarus

How can I change the SoftDevice version? [closed]

The "Bluetooth Low Energy Characteristics" tutorial, a beginner's tutorial, https://devzone.nordicsemi.com/tutori..., uses a version 11 of SoftDevice. But I need a it in version 12.3, how can I do this?

B.

253
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1
vote
2
answers
Last activity 2017-10-19 13:45:54 +0200 by Austin

SVCALL warning messages

I've recently upgraded my IDE to use Crossworks v3.6.2 which uses a GCC ARM Embedded 4.9-2015-q3-update compiler. it has by default many of the code clean up featues turned on. it has found a great many ... (more)

147
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no
votes
no
answers
Last activity 2017-10-17 15:18:18 +0200 by ASHISH

how to write a functions(program) for transmitting and receiving data over uart using nrf 51822?

Hi, there i am using nrf51822 to communicate with quectel ec25 .i want to send AT commands over uart and receive some response from quectel.for eg. i am sending a "AT" command i should get "ok" response in return ... (more)

62
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no
votes
1
answer
Last activity 2017-10-17 03:47:55 +0200 by Alex

Performing DFU with nRF Connect v1.8 Fails to Switch from App to Bootloader - Worked on 1.7.5

Since upgrading to nRF Connect on my IOS device the DFU won't reconnect to the BLE in the boot-loader after initiation from the application.

The device will migrate to the boot-loader and begin advertising but nRF connect doesn't ... (more)

109
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no
votes
1
answer
Last activity 2017-10-12 10:44:12 +0200 by Sigurd flag of Norway

how to define gpio pins and generate pwm on gpio pins?

Hi There, i am new to nrf51822 and new to program this kind of controller.I searched over the website, I couldn't find a good introductory documentation for programming the nrf51822, specifically the nrf51-dk. i have two problems 1 ... (more)

33
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no
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no
answers
Last activity 2017-10-11 07:30:44 +0200 by KETAN_PATEL

How to turn on Leds only for advertising time?

Hi, i am using SDK v8.0 and in main function, initialization like this err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), button_event_handler); and

in advertising_start function, calling function is err_code = bsp_indication_set(BSP_INDICATION_ADVERTISING); this is working. but i want like this ... (more)

44
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-1
votes
1
answer
Last activity 2017-10-10 11:04:56 +0200 by Jørn flag of Norway

how to interface tcrt1000 optical sensor with nrf51822?

Hi ,there i have tcrt1000 optical sensor wants to interface with nrf51822 so can anybody provide me the tutorial on this things with a code... cheers, Abhijeet

88
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no
votes
1
answer
Last activity 2017-10-09 21:50:34 +0200 by B

Has anyone used nf51 bluetooth with some app mobile?

Has anyone ever used nf51 bluetooth with the app inventor?

I have values ​​coming out of the microcontroller terminal. I want to send them to a mobile application using the app inventor.

But I do not know how to do ... (more)

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