# 37 questions

Tagged
• x
101
views
2
1

## Sharp Memory LCD LS044Q7DH01

Edit: The code posted below works on the 96x96 3V(LS013B4DN04) variant of the display, I still have no idea why it doesn't work on LS044Q7DH01, but I'm guessing it doesnt have much to do with the nordic ... (more)

36
views
1
vote
1

## How to use sd_rand_application ?? or use Random number with NRF51 ?

I've tried to use stdlib's random generate function.

and as usally all of the basic C language's random generate functions does, I've used srand with Seed based random. (And also, used with time(null) argument like ... (more)

30
views
1
vote
1

## nRF UART driver initialization

Hello, i'm trying to use nRF UART driver (nrf_drv_uart) to implement a high level UART manager. I followed indications on SDK documentation but it doesn't work and i think that is a problem of initialization.

Configuration: nRF52832 - SDK ... (more)

35
views
no
2

## Change tick value of timer compare event [closed]

Hello,

I'm using TIMER1 to generate a timer compare event. I connect the event with the sample task of the saadc like in the saadc example from the SDK. Everything works fine.

But now I want to change the ... (more)

24
views
no
1

## random number pool size & refresh

Is there a way to increase the size of the random number pool, and does the pool refresh periodically, or is there a way to manually trigger a refresh of the pool. Our application is requesting a 16 byte block ... (more)

59
views
2
2

## Power consumption for NRF52832 SoftDevice v3.0.0

Hi,

My apology if this question has been answered. I wonder if >2mA current draw for an APP with the following design considered normal consumption?

1. Custom GATT profile
2. Device Information Service profile
4. Power_manage() => Verified that the device ...
(more)

37
views
no
1

## How to increase throughput for BLE GATT profile?

Hi there,

I am currently working on a custom GATT profile for constant data streaming. I have to keep to GATT because I need multiple attributes to keep track of different data and for sending commands. So far, I have ... (more)

58
views
1
vote
2

I have a project I've developed on a dev board, and everything works. When integrating this into a custom board and running the firmware, however, I'm not getting any BLE radio signal whatsoever. I'm flashing the same ... (more)

24
views
1
vote
1

## Set Characteristic Handles

To maintain compatibility with our current systems we would like to be force characteristics to be at certain handles, rather than having the soft device assign them sequentially on creation.

Is this possible with the current soft device?

44
views
no
no

## DFU Implementation Issues [closed]

I am attempting to implement buttonless DFU with my application.

Using SDK v12.2.0 on a Rigado BMD-300 module (nRF52832)

Starting one step at a time, using nRFgo Studio v1.21.2.10, I can completely erase the flash ... (more)

78
views
no
1

## Problems with DLE on nRF52832DK, SDK12.2, S132v3

Hello Nordic developers,

I have been unsuccessfully trying to use the extended ATT_MTU / DLE sizes for increased throughput on a nRF52832DK board running the Nordic UART Service, using SDK 12.2.0 and S132v3.1.0. I am trying to ... (more)

57
views
1
vote
1

## How to force word alignment for FDS?

The FDS requires data to be word-aligned and multiple of the word size. How do I ensure that my source/destination data structures are properly sized/aligned?

E.g. I want to read and write a 13 byte data structure ... (more)

139
views
no
1

## Error 22 (0x16): GATT_CONN_TERMINATE_LOCAL_HOST only on Samsung XCover device

When I run the BLE peripheral HRS example on the eval board and try to connect with a Samsung XCover3 using the "nRF Connect" app, I got the error 22 (0x16): GATT_CONN_TERMINATE_LOCAL_HOST.

Doing the same with a Sony Xperia ZL ... (more)

106
views
no
1

## Eddystone EID slot's IK is not properly restored from flash on POR [closed]

Hi, this is for anyone having problem with the eddystone EID after reboot. There seems to be a problem that the EID slot will write the encrypted IK to flash instead of the plain one.

59
views
no
1

## Compiling ‘RTT_Syscalls_KEIL.c’ ->rt_sys.h: No such file or directory

Hello,

I am trying to compile the example ble_app_eddystone with the SDK12.2 for the nRF52_pca10040_s132

While compiling with SEGGER I get the error

Compiling ‘RTT_Syscalls_KEIL.c’

rt_sys.h: No such file or directory

I think that the path is ... (more)

16
views
no
no

## Abnormal connection after disconnection [closed]

hello, In nRF 52, after executing ble_advertising_start after BLE_GAP_EVT_DISCONNECTED, although BLE_GAP_EVT_CONNECTED is set on the device side although the central is disconnected. After that, it will not be connected until it is reset. Please give me your thoughts on why.

thankyou,

21
views
no
1

## Want to communicate 2 PCA10040 dev board

Hi, I am trying to communicate to PCA10040 (nRF52) dev board to communicate.

Basically i want to configure 1 board as Master another as slave, so master will initiate the connection to pair another dev board.

79
views
1
vote
1

## Setting up an example of the problem

As I promised in this thread, I have been testing out the ADC on the nRF51822 and trying to see how quickly I can sample per minute vs how many interrupts I trigger ... (more)

71
views
4
2

## how to Restart advertising after timeout?

Could you give me an example how to restart advertising after timeout.

thank.

sorry, i need on the button event to restart advertising.

103
views
1
vote
2

## System Off and GPIOTE

I have multiple GPIOs that are configured to use GPIOTE in my application. When one of these GPIOs is in the active state I start timer. Once the timer expires I want to enter system off using sd_power_system_off() and I ... (more)

150
views
3
2

## Configure TLM Frame type by default in Eddystone beacon - SDK 12.2.0

Hi, in the current project I'm working on, I need to develop an Eddystone beacon with UID and TLM frames configured by default. Based on the experimental_eddystone example, there is only one slot (slot 0) for configuring a default ... (more)

36
views
no
1

## change SCHED_MAX_EVENT_DATA_SIZE and device stall

I want to use app sched feature, so as example does, I call: static void scheduler_init(void) { APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE); }

since I have my own event data, the max size is 9, so I changed the SCHED_MAX_EVENT_DATA_SIZE to 9, the ... (more)

116
views
1
vote
2

## How to use GPIOTE driver

Hello,

I'm using SDK12.2.0.

I opened the PPI example (in SES). I want to use the GPIOTE driver to trigger GPIO tasks on Timer events. So I #include "drivers_nrf/gpiote/nrf_drv_gpiote.h" and included the file drivers_nrf ... (more)

22
views
no
no

## No direct advertising possible. Peer_id is always 0 after bonding.

Hello,

I'm developing a BLE Application where I use the peer manager. My Goal is to use direct advertising after disconnection if a device already has bonded. But every time I call

ble_advertising_start(BLE_ADV_MODE_DIRECTED);


it doesn't work and ... (more)

42
views
1
vote
1

## non-connectable advertising timeout not working in Eddystone example

Hi, I tried to enable non-connectable advertising timeout using the macro APP_CFG_NON_CONN_ADV_TIMEOUT in es_app_config.h, but it has no effect. I test this using nRF connect App, I continuously receive data from the beacon. Then I set a breakpoint in ... (more)

51
views
no
no

## Handling Connection Parameter Update Request from Central

Hello, do I need to do anything to accept new Connection Parameters as a Peripheral when the Central updates them?

I am seeing 'BLE_GAP_EVT_CONN_PARAM_UPDATE' events, which makes me believe that the softdevice handled the update and is sending that event ... (more)

177
views
2
1

I am using the SAADC on the nRF52832, SDK12.2.0, with it set to 12 bits and low power mode. I have enabled five channels which I run blocking nrf_drv_saadc_sample_convert conversions on periodically, currently once a second.

When I ... (more)

61
views
no
1

## p_tx_power_level dosen't work

Hi it's my advertising_init func :

static void advertising_init(void)
{
int8_t tx_power = -4;
uint32_t               err_code;

advdata.include_appearance ...
(more)

53
views
2
1

## ADXL345 I2C integration with nRF52832

I am trying to integrate an ADXL345 with my nRF52. I am attempting to implement Bjørn Spockeli's driver which I stumbled upon here: https://devzone.nordicsemi.com/questi...

I am using sdk12.2.0, specifically the TWI_sensor example project ... (more)

59
views
no
1

Hi,

I'm trespassing some code of nRF51 to nRF52 (s132, SDK 12.2.0) and I get an error when I try to call sd_ble_gatts_rw_authorize_reply. This is the code

case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST:
if ( p_ble_evt->evt.gatts_evt.params.authorize_request.type == BLE_GATTS_AUTHORIZE_TYPE_READ ...
(more)

#### Statistics

• Total users: 17051
• Latest user: Jaxon Clement
• Resolved questions: 8868
• Total questions: 20786

## Recent blog posts

• ### Getting started with Nordic's Secure DFU bootloader, a step by step guide

Posted 2017-03-20 17:13:52 by Hung Bui
• ### From Nordic UART Service to MicroPython using PolyMCU and Gattlib

Posted 2017-02-27 16:40:00 by Olivier
• ### Throughput and long range demo

Posted 2017-02-28 16:48:25 by Ole Bauck
• ### nRF52840 long range demo

Posted 2017-02-14 12:46:03 by Ole Bauck
• ### Setup and Running the OpenMesh DFU on the nRF52 DK v2.0

Posted 2017-02-06 22:33:25 by martindavidb

## Recent questions

• ### what kinds of flag Do I set, when I use sdk13 in keil-c debug mode

Posted 2017-03-24 10:41:29 by Vincent
• ### The peak current of nRF52832

Posted 2017-03-24 10:16:17 by Stanley
• ### multiple definition of `SPI1_TWI1_IRQHandler'

Posted 2017-03-24 10:03:43 by ashare
• ### Questions about BLE multirole LESC

Posted 2017-03-24 09:50:09 by Fabien Comte