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Last activity 2017-06-28 14:50:31 +0200 by Joakim Jakobsen flag of Norway

Unable to control GPIO pins in nRF51422

Hello, i am a beginner, i want to configure an LED to be connected on one of the GPIO pins, please help me with the code.

12
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answers
Last activity 2017-06-28 13:26:38 +0200 by Verma

map pins from nRF51422 to OLED spi

I am unable to map and code nRF51422 for my 128x32 spi OLED display. Please help.

7
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answers
Last activity 2017-06-28 13:22:27 +0200 by khosla

Sniffer not showing up my device.

Hi, I am using radio with ppi to advertize packets as shown in the mainc file attached.mainc.txt Even after allocating the access address of Bluetooth on line 196 as set_address0(0x8E89BED6); and advertizing channel selected as 37 as ... (more)

45
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1
vote
2
answers
Last activity 2017-06-26 15:29:36 +0200 by emdi

Fstorage Queue Runs Full when Bluetooth Connected

I'm trying to store some values with fstorage. The store operations seem to be queued successfully, but never executed. I currently have this to test the behavior:

FS_REGISTER_CFG(fs_config_t fs_config) =
{
    .callback  = fs_evt_handler, // Function for event callbacks.
    .num_pages = 1,      // Number ...
(more)

24
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no
votes
1
answer
Last activity 2017-06-23 10:48:51 +0200 by Jørgen Holmefjord flag of Norway

Using RTT viewer in SDK 12.2 SES

Can you please tell whether i follow the the entire tutorial as in the link or just the first step for SDK 12.2 SES. Even if i use the first step, i need the CMSIS wizard that uses Java ... (more)

30
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no
votes
1
answer
Last activity 2017-06-18 23:20:26 +0200 by endnode

Can't I connect to device that hasn't been discovered yet?? (but with Address)

Can't I connect to device that hasn't been discovered yet??

I'm trying to connect one device(A) to another device(B) which ADDRESS is known but never discovered yet.

The reason why it isn't discovered is ... (more)

21
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Last activity 2017-06-18 01:36:21 +0200 by Daniel T. Lee flag of Korea, Republic of

GPIOTE Library makes my Board Brick?? (J-Link is not Found)

GPIOTE Library makes my Board(nRF51422-QFAC) Brick??

I just build my nRF51422 Board, and It's pretty working well before I've used GPIOTE Library.

Before using GPIOTE Library, I've used GPIOTE Driver, And It works pretty well. (But ... (more)

43
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no
votes
1
answer
Last activity 2017-06-16 13:31:04 +0200 by Torbjørn Øvrebekk

How to enable radio interrupts using SDK?

mainc.txt

we can use INTENSET to enable certain events on the radio as in line 460 in mainc file attached. But how to enable this on the radio as a whole. I basically need a couple of events like ... (more)

19
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no
votes
1
answer
Last activity 2017-06-15 21:15:53 +0200 by Jørgen Holmefjord flag of Norway

Can nRF51 be BLE connected while it's on sleep mode? (connected by other device as Peripheral mode)

Can nRF51 be BLE connected while it's on sleep mode? (connected by other device as Peripheral mode)

I thought, to be connected as peripheral mode, It must be advertising itself to be connected, because after a little bit of ... (more)

40
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1
vote
1
answer
Last activity 2017-06-15 15:03:15 +0200 by Jørgen Holmefjord flag of Norway

What is 3UL compare time in RTC???

In example of peripheral RTC,

It compares time of 3UL.

BUT I've never heard about any measurement of UL... How can i transform it to second???

42
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1
vote
1
answer
Last activity 2017-06-14 12:33:04 +0200 by Daniel T. Lee flag of Korea, Republic of

Is there any way that I can use more than 3 timer in nRF 51 ??

Is there any way that I can use more than 4 timer in nRF 51 ?? (four or more...)

I'm using Softdevice 130, so It uses Timer 0,

and I'm using RGB Sensor using PWM Library, and

Red and ... (more)

12k
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5
votes
6
answers
Last activity 2017-06-11 00:16:25 +0200 by Gabor Paller

Why does my nRF51822 consume > 1 mA in sleep?

No matter what sleep mode I put my nRF51822 in (system on, idle, system-off), it seems that the base current is above 1 mA. Is this how it's supposed to be?

22
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no
votes
1
answer
Last activity 2017-06-08 06:06:59 +0200 by makerTim

IOS-nRF-toolbox failed to compile (Xcode ) [closed]

Hi,

IOS example code

How to import CorePlot correctly in Xcode? I always get this error message:

~/IOS-nRF-Toolbox-master/nRF Toolbox/HRS/NORHRMViewController.swift:11:8: No such module 'CorePlot'

There was few articles cover this issue, so I have to ... (more)

43
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no
votes
1
answer
Last activity 2017-06-05 18:44:21 +0200 by John Whitley

iOSDFULibrary hang at discoverCharacteristics()

We're encountering a frequent but intermittent hang after handing off OTA DFU to iOSDFULibrary 3.1.0. In the happy case, the characteristics are discovered and DFU process proceeds normally:

[DFU] Discovering characteristics in DFU Service...
[DFU] peripheral.discoverCharacteristics ...
(more)

41
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no
votes
1
answer
Last activity 2017-06-02 10:26:48 +0200 by endnode

DTM reports 0% PER even if antenna is removed

Hi

While using 2 nRF51422 dev boards and using the DTM software together with the DTM python example script the python program reports 0% PER even if I cut the antenna on one of the devices.

Shouldn't I get ... (more)

102
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no
votes
3
answers
Last activity 2017-05-31 17:06:38 +0200 by khosla

time synchronization across different nodes in a mesh network, single hop as well as multi hop.

I am working on time synchronizations between different nodes in a mesh network. I have earlier worked on the radio and the ppi examples given. I wish to generate time stamps at each send and receive events between two different ... (more)

34
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1
vote
1
answer
Last activity 2017-05-31 11:30:53 +0200 by Petter Myhre flag of Norway

on_db_disc_evt, ble_db_discovery_evt_t may not be resetted?

I'm using NRF51422, s130, SDK v12.

And I'm working on a project that can connect concurrent peripheral and Central.

In this continuious connect and disconnect sequences, I need to reset all of my characteristic handler and re-set with ... (more)

79
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no
votes
2
answers
Last activity 2017-05-24 12:23:41 +0200 by Martin Peters

SDK12.3. Secure Bootloader : UART and ld config [closed]

Hi all

I'm working on a custom board using gcc and eclipse.

My primary problem is I'm fighting with the ld settings for the secure bootloader. I activated the RTT which led to a slightly larger HEX debug ... (more)

37
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2
votes
1
answer
Last activity 2017-05-24 10:35:28 +0200 by endnode

Expected PER while using DTM and 2 nRF-dev boards

Hi

I'm preparing for some tests and I'm wondering where I can find information about what the expected percentage error rate should be?

Right now with 2 nrf boards connected I get around 0-1% PER while testing every channel.

92
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5
votes
1
answer
Last activity 2017-05-23 16:04:20 +0200 by hberg

Use BLE without GAP/GATT

I'm currently writing my thesis, and my goal is to establish a network protocol like IP. We need to transmit about 200kB of data between 2 or more nodes once every 10-30 minutes.

My current approach is to use ... (more)

83
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1
vote
2
answers
Last activity 2017-05-19 13:46:34 +0200 by Wojtek flag of Poland

Can nRF51422 or nRF51822 can be used as bluetooth device for Raspberry pi?

Can nRF51422 or nRF51822 can be used as bluetooth device for Raspberry pi?

As I can see on the terminal Linux, the hciconfig log says, raspberry pi 3's Bluetooth device is connected to board with UART Connection.

I'm ... (more)

31
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no
votes
1
answer
Last activity 2017-05-17 09:55:55 +0200 by chocol8

Unable to use Pstorage in my code

To @Hung Bui. Hello sir. I am new to NRF51 microcontrolers and I am trying to use Pstorage in my written code. I have noticed this post of your's: image description

I am using nrf51422 and and edited ble_app_uart example as ... (more)

56
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no
votes
2
answers
Last activity 2017-05-14 11:30:36 +0200 by ofer

MSP430f169 SDK for nRF51422

I have a device the uses MSP430f169 and CC2500 RF controller for communication I need to replace the CC2500 RF controller with nRF51422 device. As I understand an nRF51422 SDK for MSP430 dows not exists. Can I get source of ... (more)

55
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2
votes
2
answers
Last activity 2017-05-07 06:29:49 +0200 by RK flag of Singapore

How Can I limit Gatt Data bytes that I write? (Not With Zero-Fill)

I created an characteristic that has MAX_Length = 20 Bytes characteristic.

And When I'm trying to write less than 20bytes on this Characteristic, It Always send with 20Bytes with Zero filled data bytes.

For example, I'd like to write ... (more)

37
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no
votes
1
answer
Last activity 2017-05-05 08:19:19 +0200 by Kristin flag of Norway

How to enter directe test mode?

We use Nrf_studio to connect our board by uart to enter direct test mode. But an error occurs in serial connection.

I want to know, use our own project program is allowed ? Or must program official dtm project can enter ... (more)

68
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1
vote
1
answer
Last activity 2017-05-03 10:34:41 +0200 by Jørn flag of Norway

nRF51422 External Antenna Design

Issue: With my external antenna design, I get lower dbm than PCB antenna (nRF51DK) with same distance.

My external antenna design: -70dbm

nRF51DK: -40dbm

In this answer, you mentioned it's possible to use an external antenna for nRF51422.

I ... (more)

50
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2
votes
1
answer
Last activity 2017-05-03 05:22:32 +0200 by RK flag of Singapore

In GATT Packet transfer, is there occurs any packet loss and retrial?

In GATT Packet transfer, is there occurs any packet loss and retrial?

I'm trying to connect about -90 Rssi dBm peripheral device with my nRF51-dk.

In this far range, does it may occur with packet loss in this far ... (more)

91
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1
vote
1
answer
Last activity 2017-04-28 10:52:20 +0200 by Jørgen Holmefjord flag of Norway

ADC AIN0 -> P0.0?

We have done a custom PCB believing that we could use P0.0 as analog input. Now we kind of found out that we cannot, and will change the PCB design. Given that we already have some of them manufactured ... (more)

80
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1
vote
1
answer
Last activity 2017-04-27 13:34:18 +0200 by Sigurd flag of Norway

[nrf51-dk] Can I use both twi instances as well as an SPI instance?

I have a project where I need both TWI instances as well as an SPI instance to be used with sdcard and fatfs libraries. When I try to compile I get the error: SPI1_TWI1_IRQHandler if I have SPI1_ENABLED or SPI0_TWI0_IRQHandler ... (more)

85
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no
votes
1
answer
Last activity 2017-04-26 12:27:10 +0200 by Jørgen Holmefjord flag of Norway

How to change the data type from integer to floating point so i can read floating ponit voltages on copper coap?

I have an iot/coap environment setup and i want to read input voltage connected to p0.01.I can read the input in terms of resolution(0-1023).I can convert this values to voltage(0-3).I want to read ... (more)

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  • Resolved questions: 9682
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  • Total questions: 23161