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Last activity 2017-12-28 11:42:47 +0200 by Martin Børs-Lind flag of Norway

nrf51822 rtc with softdevice

Hello,

Is there a demo project that contains RTC function with softdevice. I called the lfclk_config() and rtc_config() function before softdevice initial in main(), but it could not pass through SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL). How can I sovle this issue, am ... (more)

45
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no
votes
1
answer
Last activity 2017-12-28 11:34:55 +0100 by Faizan

Antenna selection

I am using nRF52832 , i need to connect external antenna with nRF52832 chip. I need 20 to 30 meter range. so which antenna is useful. and what is the necessary rule for connect the external antenna. Thank you in advance.

61
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no
votes
1
answer
Last activity 2017-12-27 13:23:58 +0200 by Ole Saether

Read flash data using FDS

Hi guys,

I am using FDS module in nrf51822, sdk 11 to store and read data from flash. I have a problem about reading the data. In the documents, the function:
fds_record_open(&record_desc, &flash_record) is used to read data from ...
(more)

383
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no
votes
1
answer
Last activity 2017-12-27 12:23:28 +0200 by Raghu DS

Flashing nRF51882 with IAR IDE and ST Link V2 (SWD mode)

Hello folks,

I have been trying to flash/debug an example(blinky_blank_pca200006-nrf51822_xxaa) from nRF SDK installation but to no avail.

The hardware is actually the NRF51822-04 module(from wireless tag) which has an existing firmware on it.

I am pretty ... (more)

32
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no
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no
answers
Last activity 2017-12-27 05:39:27 +0100 by Palmer

update advertising

Dir Sir, I want update advertising data. But when i called advertising_init again, BLE is stop. I attached my code. Please help.main-advertising.c

24
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1
vote
1
answer
Last activity 2017-12-26 22:43:00 +0200 by endnode

Unable to find nrf51822 in bluetooth device list

Hi, I'm using nrf51822 module for bluetooth connectivity in one of my projects. I'm able to compile the code in keil v5 without any errors or warnings. But I'm unable to find nrf51822 in the bluetooth devices ... (more)

265
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2
votes
1
answer
Last activity 2017-12-24 17:27:23 +0200 by endnode

Is heart rate service the correct thing to use for power consumption efficiency?

I am developing some firmware using SDK 8.1 where power consumption is absolutely critical. The firmware will make a ble connection between the central and peripheral device and after that does almost nothing except for every couple months the ... (more)

32
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1
vote
1
answer
Last activity 2017-12-24 17:19:32 +0200 by endnode

In heart rate monitor, what is the purpose of m_memory_access_in_progress?

I am working through the heart rate monitor central ble device code on Nordic SDK 8.1. I noticed that the variable

bool m_memory_access_in_progress = false;  /**< Flag to keep track of ongoing operations on persistent memory. */

is created, but I can ... (more)

57
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1
vote
1
answer
Last activity 2017-12-24 00:06:16 +0200 by endnode

What does this error mean: Connection Request Failed, reason 7

I am developing an app that uses both a central and a peripheral device using Nordic SDK 8.1. I was working off the hrm example code and wanted to move all the scanning methods to their own file to ... (more)

132
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1
vote
1
answer
Last activity 2017-12-24 00:00:31 +0200 by endnode

How can we make our own BLE accessory device auto re-connectable in iOS /Android?

I'm wondering whether or not we can make a specific BLE peripheral device with having this ability to be supported by client iOS/Android device for automatic scanning/reconnecting, i.e without using any extra app.

I think some ... (more)

34
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no
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answers
Last activity 2017-12-22 22:21:39 +0200 by Sebastien

Undetected NRF51822

Good Day,

I am unable to connect my Rigado BMD-200 (NRF51822) to nRFgo studio using the J-Link EDU Mini. However, using the nRF connect application for Android I am able to see the RigCom BLE transmission. I have connected the ... (more)

33
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no
answers
Last activity 2017-12-22 14:50:55 +0100 by Mike

S120 softdevice, ble_app_hrs_c how to exit from scan_start() to main [closed]

main.cI'm using S120 softdevice with nrf51822, I want to use S120 as central and peripheral devices. When I received my beacon data then switch to peripheral for advertise. When I got received beacon data from on_ble_evt then ... (more)

47
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no
votes
1
answer
Last activity 2017-12-22 11:13:45 +0100 by Torbjørn Øvrebekk

How to increase data transfer rate for BLE nrf51822 to raspberry pi?

I am working on a project where i need to send sensor values from nrf51822 module to a raspberry pi. The sensor values are received by the nrf using I2C protocol. I am using mbed compiler with the BLE.h ... (more)

27
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no
votes
1
answer
Last activity 2017-12-22 10:49:19 +0100 by Torbjørn Øvrebekk

how to set nRF51822 sensitivity?

Hi,

We are using nRF51822 Gazell protocol. We found that when host dbm is getting down to -61 or -62 dbm, the communication will lost. We had set it to +4db and use 250kb datarate, use NRF_GZLL_DEVICE_CHANNEL_SELECTION_POLICY_USE_SUCCESSFUL & 2700 time slot ... (more)

48
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1
vote
1
answer
Last activity 2017-12-21 21:05:02 +0200 by shibshab

nrf51822 password on characteristic

Good evening. I write a project on nrf51822 in which there are a number of services with a set of characteristics (write and read). I need to limit access to some characteristics with a password. Is it possible?

49
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no
votes
1
answer
Last activity 2017-12-21 18:12:39 +0200 by endnode

nrf51822 password on characteristic

Good evening. I write a project on nrf51822 in which there are a number of services with a set of characteristics (write and read). I need to limit access to some characteristics with a password. Is it possible?

48
views
no
votes
3
answers
Last activity 2017-12-21 03:40:21 +0100 by rsj

use sd_flash_page_erase then system reset

when i use sd_flash_page_erase() the system reset

30
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no
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no
answers
Last activity 2017-12-21 02:11:55 +0100 by niels

DFU dongle no advertising

Hi all,

I tried to load the DFU example for nrf51822 from SDK12.3 on the dongle(PCA10000). softdevice: S130 2.0.1

I followed the tutorial on: https://devzone.nordicsemi.com/blogs/...

When the bootloader.hex is flashed nothing ... (more)

44
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no
votes
no
answers
Last activity 2017-12-20 18:36:31 +0200 by leon1d

Application updated over the air doesn't start properly

Dear all,

I have nRF51 DK and I use mbed CLI to build my application that is simple mbed-os-example-blinky. Also I have SDK11.0.0 and I built the ble dfu bootloader (./examples/dfu/bootloader/pca10028/dual_bank_ble_s130/armgcc), merged that ... (more)

424
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1
vote
1
answer
Last activity 2017-12-20 15:55:41 +0200 by sreehari410

How to Close SWD

Hi there, We are developing bluetooth bracelet using 51xx and 52xx Bluetooth chip and the hard hardware part has been done.However, for safety considerations,we need to disable SWD after the program is downloaded. We want to disable SWD ... (more)

36
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1
vote
1
answer
Last activity 2017-12-20 13:40:50 +0100 by Torbjørn Øvrebekk

Handling iso datetime in nrf52

I am using nrf52832 chip. I will be receiving time in isoFormat.

I am wondering how convert the iso format to get the date and time in my C program.

I am not using any RTOS but doing everything on baremetal.

46
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no
votes
no
answers
Last activity 2017-12-20 04:38:43 +0200 by daruei.L

Under good radio env., BLE_HCI_STATUS_CODE_LMP_RESPONSE_TIMEOUT likely(30%) happens

Hello supporters and enthusiasts,

I'm developing a BLE product which mainly works as central role for all scenarios. The steps how the central controls to a peripheral device are very simple.

  1. the central connects to a peripheral device.
  2. the ...
(more)

67
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no
votes
1
answer
Last activity 2017-12-19 15:02:26 +0200 by vam5104

Issue with MPU9250 and nrf52

Hi,

I have been working on MPU9250 examples given in here.Though the program runs fine in KeilUvision 5, the output in tera term shows only 0,0,0 for Accelerometer values in X,Y and Z. I connected the ... (more)

41
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no
votes
no
answers
Last activity 2017-12-19 10:44:01 +0200 by Cesar

how to disconnect HID deivce on the peripheral side?

Hello, My question is when the nrf51822 connect the phone A, I whant disconnect ble on nrf51822 side let the new phone B can scan and connect nrf51822.

when used "sd_ble_gap_disconnect" disconnect the ble, the host(iphone/android phone) whill ... (more)

24
views
no
votes
1
answer
Last activity 2017-12-19 10:39:08 +0100 by Jørgen Holmefjord flag of Norway

use sd_flash_page_erase then system reset [closed]

when i use sd_flash_page_erase then system reset

72
views
1
vote
2
answers
Last activity 2017-12-19 09:11:03 +0200 by Jørn flag of Norway

Relay doesnt work toggling GPIO Output? how can pull it down

Hi triying to drive a Relay with Output but have tried every functon in "nrf_gpio.h"

this works with a LED perfectly : nrf_gpio_pin_toggle(23);

in the main i configure :

nrf_gpio_cfg_output(23); nrf_gpio_pin_write(23, 0);

but the relay dont change state ... (more)

77
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no
votes
1
answer
Last activity 2017-12-18 11:10:10 +0100 by Martin Børs-Lind flag of Norway

piezo buzzer has to generate sound until event occurs

i successfully generated sound using pwm and piezo buzzer

while(/*while event occurs*/)
{
    for (uint8_t i = 0; i < 50; ++i)
    {
        value = (i < 20) ? (i * 5) : (100 - (i - 20) * 5);
        /* Set the duty cycle - keep trying until PWM is ready... */
        while ...
(more)

39
views
no
votes
1
answer
Last activity 2017-12-18 10:52:15 +0200 by run_ar

Lower scanning power for BLE

I am developing an application using Nordic SDK 8.1 for BLE that requires a low power consumption. To lower the power of the slave BLE device I was able to lower the advertising power using:

sd_ble_gap_tx_power_set(-30);

I am ... (more)

37
views
no
votes
1
answer
Last activity 2017-12-18 10:13:26 +0100 by Bjørn Kvaale

Thingy 2.0.1 FW flash : nrf_section_start undefined

Hello,

This is related to using Seger embedded studio on a mac for thingy52.

With all the amazing help from this forum, I am trying to compile and upload FW onto thingy 52 using the FW baseline from Nordic at ... (more)

38
views
no
votes
1
answer
Last activity 2017-12-18 08:25:27 +0100 by endnode

Which nRF development kit is suitable for BLE meshing.

Whether nRF51822 replaced by nRF51 DK and nRF51 Dongle

How nRF51 DK and nRF51 Dongle differ from nRF51822.

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