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22,463 questions

31
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no
votes
1
answer
Last activity 2017-05-30 14:56:35 +0200 by Jørgen Holmefjord flag of Norway

PCA10056 Silk Screen Errata

Could Nordic please confirm that the "SB13-SB15" and "SB23-SB25" silkscreen markings incorrectly imply that pin 1 of the SPI flash part, which is actually "!CS" would appear to be indicated as SB13 and SB23, rather than the proper SB15 and ... (more)

51
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no
votes
1
answer
Last activity 2017-05-30 14:54:26 +0200 by Jørgen Holmefjord flag of Norway

LMP Response Timeout - experimental_ble_app_multiperipheral_pca10040_s132

experimental_ble_app_multiperipheral_pca10040_s132 connectivity issue.zip

I’m getting an LMP Response Timeout disconnect reason about 50% of the time when trying to get the nRFConnect App running on either an Android Pixel or iPhone 7 (running the latest OS versions) to ... (more)

4
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no
votes
no
answers
Last activity 2017-05-30 14:53:16 +0200 by Mrunali

BLE GATT_INTERNAL_ERROR 129

Hi,

I am doing development on Android platform. I am using Marshmallow device to develop my BLE application. Many times I am getting status code 129 in onServicesDiscovered() method. After that connection gets disconnected. And it goes into infinite loop ... (more)

74
views
2
votes
1
answer
Last activity 2017-05-30 14:49:49 +0200 by Vlad Mokhnachov

Broken bit in RAM region

Hi, Nordic! We have two PDK-NRF52840 and custom boards with NRF52840 chips. 2 from 5 chips have a broken bit in RAM. This is different places. For example: image description

Is this problem only for preview chip? Will You make manufactoring tests ... (more)

115
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no
votes
2
answers
Last activity 2017-05-30 14:13:50 +0200 by Joakim Jakobsen flag of Norway

hello first time i am working on nordic nrf52840 please help how to start with the keil ide

hello iam using nrf52832 and just started working is there any spp profile available for the same where i can send and receive the data btwn my smartphone and device wirelessly.??

17
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no
votes
no
answers
Last activity 2017-05-30 13:57:38 +0200 by Prashant Singh

Data storing in flash based on timer.

Hello,

I am working on NRF52382 custom board, where I am running a timer of 30 sec to get a value every 30 sec.

I want to save this value in flash.I am well aware of flash data storage ... (more)

13
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no
votes
no
answers
Last activity 2017-05-30 13:45:39 +0200 by slowhand

Testing coded PHY with UART?

I have two nRF52840-pdk's and two laptops. I was thinking to send test strings using the following Basic setup:

       laptop1 - usb1 - pdk1 ....(coded PHY transmission)....pdk2 - usb2 - laptop2

Can I use directly some existing example codes for making this ... (more)

18
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-1
votes
no
answers
Last activity 2017-05-30 13:42:58 +0200 by Martin Kulessa flag of Germany

Multilink Peripheral NRF51422

Hi, ti wanna

591
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9
votes
1
answer
Last activity 2017-05-30 13:04:34 +0200 by Aryan flag of Norway

What are SDK 13.x.0 known issues

On SDK 13.x.0 only

Please Do not judge the quality of SDK based on number of entries here. This thread should be considered as part of Nordic effort to find issues and possibly give a workaround to maintain ... (more)

22
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1
vote
1
answer
Last activity 2017-05-30 13:03:43 +0200 by Hung Bui

Android delayed notification

Hi, on Android, I sometimes get delayed notifications. I measure realtime data and send them over notification, and I can see data change on Android with approx 1 s delay. Sometimes it helps to connect and disconnect BLE device.

On ... (more)

97
views
6
votes
1
answer
Last activity 2017-05-30 12:49:25 +0200 by pawan_v61

is nrf52 dk support 3 wire spi interface

hello i am new to spi, i am doing project on 3 wire spi interface. I am using 3 wire interface as Sclk,ssn,MOSI pins only , I am not using MISO pin .I am tested spi example code but ... (more)

14
views
1
vote
no
answers
Last activity 2017-05-30 12:41:12 +0200 by purgoufr

How to create a whitelist on the Central device

I want to create a whitelist on the Central device. Because there is a lot of peripheral devices around and I just want to connect one peripheral device. First I register the address of the central device to the peripheral ... (more)

26
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no
votes
no
answers
Last activity 2017-05-30 12:24:54 +0200 by Lola

Is there a way to get more capacitive touch inputs?

Both the capacitive touch library and the driver (which is better ?) are using the analog inputs. There are only 8 of them , and we need 10 at least buttons.

Is there a way to "cheat" ? I need different buttons where ... (more)

49
views
1
vote
1
answer
Last activity 2017-05-30 12:20:01 +0200 by Hung Bui

DFU firmware encryption

Hi,

I would like to implement DFU with firmware encryption. I'm aware this isn't present in SDK 12 and would like to modify the secured bootloader to implement it.

As far as I understand, a DFU package is ... (more)

33
views
1
vote
3
answers
Last activity 2017-05-30 12:02:16 +0200 by huaminhtuan

BLE config

Hi all,

I am using nRF52832 DK for my project. I need to config BLE for connecting with my phone. After a lot searching, I know that I can use softdevice API for configuring BLE. The problem is that I ... (more)

42
views
no
votes
1
answer
Last activity 2017-05-30 11:26:32 +0200 by Petter Myhre flag of Norway

S140 - Non connectable advertising interval

Hi everyone!

My question is for engineers of Nordic. I need to apply NRF52840 as a "beacon". As there is no ready templates of beacons in nRF5_SDK_13.0.0-1alpha_055eef3, I took as a basis the template "ble_app_beacon_pca10040_S132" (NRF52832) and ported ... (more)

25
views
no
votes
1
answer
Last activity 2017-05-30 11:21:51 +0200 by Kristin flag of Norway

WT51822-S4AT -> transmit data to PC

Hello!

I'm doing master thesis and I've chosen WT51822-S4AT board for BLE. I've made board successfully and programmed uC to send serial data to BLE.

I'm able to received data on mobile phone with WirelessTag Chinese ... (more)

40
views
1
vote
1
answer
Last activity 2017-05-30 11:18:23 +0200 by Jørgen Holmefjord flag of Norway

SAADC don't wake up.

I mashed up RTC and SAADC examples. The files of the project are attached in the end of the post. The problem is that after the first iteration (I want to sample audio for 10ms from saadc every 3 sec ... (more)

44
views
1
vote
1
answer
Last activity 2017-05-30 11:18:20 +0200 by Hung Bui

My nRF51822 can not reach 1MBaud on an UART serial UART communication

Hello,

I am using developping on an nRF51822 with SDK12. In our application, our custom board need to communicate with a computer through a USB communication. I am not using UART over BLE because I do not use BLE in ... (more)

6
views
no
votes
no
answers
Last activity 2017-05-30 11:15:03 +0200 by Ray Breslin

Configuring LEDs for bootloader_secure-Example on custom-board

Hello,

I am using the bootloader_secure-Example on a custom-board and I want to configure a LED as status-indication.

Since I am on a custom-board I disabled the functions leds_init() and buttons_init(), that would provide some functionality when using a nRF52-DK ... (more)

36
views
2
votes
1
answer
Last activity 2017-05-30 11:12:48 +0200 by Martin Sivertsen

Having a hard time printing floats that are less than 1 with many digits behind the decimal point using NRF_LOG_FLOAT.

Here is the code I'm using to test it out:

static float number   = 0.5678905;

NRF_LOG_INFO("Float number: "NRF_LOG_FLOAT_MARKER"\n\r",  NRF_LOG_FLOAT(number));

And this is what is printed out:

:INFO:Float number: 0.56

The float is reduced ... (more)

30
views
no
votes
1
answer
Last activity 2017-05-30 11:01:06 +0200 by Kristin flag of Norway

Serial port interrupt

I have a serial port set upp with the serial port library like this:

#define UART_PIN_DISCONNECTED           0xFFFFFFFF /**< Value indicating that no pin is connected to this UART register. */
#define RX_PIN_NUMBER                   7
#define TX_PIN_NUMBER                   8
#define CTS_PIN_NUMBER                  UART_PIN_DISCONNECTED
#define RTS_PIN_NUMBER                  UART_PIN_DISCONNECTED ...
(more)

38
views
1
vote
1
answer
Last activity 2017-05-30 10:48:56 +0200 by endnode

Audio between 2 nrf52840dk

Hi all,

if i buy 2 nrf52840dk: Is possible create an audio connection like intercom between the two dk? Can I send my voice from "dev board 1" to "dev board 2"?! and when i send my voice, can i ... (more)

13
views
no
votes
no
answers
Last activity 2017-05-30 10:30:22 +0200 by Sagisawa Yukichi

How to read fifo in TWI?

Hello.

I use nRF52 & mpu9250. I want to use dmp. But now it's not going well. I think the cause is method of loading from fifo register.

static uint32_t mpu9250_read_fifo_register(uint8_t address, uint8_t reg, uint32_t length, uint8_t * p_data)
{

    uint32_t ...
(more)

45
views
1
vote
1
answer
Last activity 2017-05-30 10:08:53 +0200 by Aryan flag of Norway

Interface BLE51822 with FreeRTOS

Hi, I want to interface BLE module with freeRTOS. Does nordic provide BLE stack for freeRTOS? and if yes then is it opensource? or is there any standard BLE stack which can be modified to work with freeRTOS and BLE51822?

56
views
1
vote
1
answer
Last activity 2017-05-30 09:50:17 +0200 by purgoufr

There are more than one "peripheral" and more than one central. How can we eliminate the signal confusion?

First I register the address of the central device to the peripheral device. When I work with a single peripheral device and a single central device, I can send commands from the central device to the peripheral device. But when ... (more)

78
views
no
votes
2
answers
Last activity 2017-05-30 09:45:27 +0200 by Hung Bui

Secure DFU example !!

Why did you make the secure dfu example so complicated ? The sample works but why is it so difficult??

16
views
no
votes
no
answers
Last activity 2017-05-30 09:40:45 +0200 by Niklas Wigertz Danielsson

Simultaneous scan/advertisement S130 stack problem

Hello! I have a problem when scanning and advertising at the same time with a NRF51822 and S130 v.2.0.0. (SDK11).

I can start both scanning and advertising without any problem and they seem to work fine, but ... (more)

108
views
no
votes
1
answer
Last activity 2017-05-30 09:38:12 +0200 by Artem Efremov

Error when programming a custom board using nRF52-DK

Dear colleagues,

I am trying to erase / program the custom board ( with nRF52832 SoC installed) using nRF52-DK. The setup looks like that:

nRF52-DK Custom / External Board

VDD ------+-------------> VDD

VTG ----+/

GND ------------------------> GND

GND DETECT -----/

SWD IO -----------------> SWD IO

SWD CLK ----------------> SWD ...

(more)

26
views
no
votes
1
answer
Last activity 2017-05-30 09:12:42 +0200 by Kristin flag of Norway

The right flow to change the advertising data during run-time

I'm working on the product using the nRF51422 QFAAE00 , SD110_nrf51_8.0.0, SDK 10.0.0. My product has the advertising flow as below

  • The device advertises forever with advdata updated during run-time by using ble_advertising_init()
  • If the device ...

(more)

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