# 268 questions

Tagged
• x
10
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## How to fetch peer's base uuid?

Hi experts,

I have just tried lbs example. I saw in the ble_lbs_c.h, the base uuid and service uuid are defined for the peripheral peers who are going to be connected. However, if I don't know these uuids ... (more)

13
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## HardFault_Handler() called when NRF_LOG_ENABLED is disabled

In my application when I disable NRF_LOG_ENABLED, HardFault_Handler() is getting called. To debug this issue I defined a HardFault_Handler() in my code and inserted a break point in it. Below is the backtrace

#0  HardFault_Handler () at main.c:165
#1 ...
(more)

7
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## How can I enable gatt_cccd notification automatically?

I've searched for enabling notification, but there are some points that I can't understand.

GATT characteristic attributes and characteristic cccd values are dedicated to GATT_S.

Q1. To Enable my GATT_S characteristic notification, which device is responsible for enabling ... (more)

22
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## nrf51822 advertising packet not detected

Hi,

I would like to ask your support for a very unusual problem that I'm facing with a project based on nrf51822.

The board under test is based on nrf51822, SDK12.1, softdevice S130. The nordic example used for ... (more)

27
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1

## Beacon and Central

Good afternoon.

I have 2 boards NRF51:

• One as beacon (SDK 9), use example code "nRF51_SDK_9.0.0\examples\ble_peripheral\ble_app_beacon".

• The other as central (SDK10, softdevice s130), use example code "nRF5_SDK_10.0.0\examples\ble_central\ble_app_uart_c" to read beacons ...

(more)

18
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## Bonding issue in SDK11 with ANCS

Hi I am using SDK11 with S130, NRF51822 that using ANCS and facing bonding problems after reach the max bonds. Reference to nRF51-ble-peripheral-bond-handling example, I use the ble_app_ancs_c project example and add app_bond.c and app_bond.h to the project ... (more)

59
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1
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1

## Does SoftDevice S130 V.2 have limitation in L2CAP_MTU size by 23 bytes?

Hello,

I want to clarify one thing related to the limitaion in SoftDevice S130 V.1 of L2CAP_MTU size by 23 bytes. Is any way to extended it?

Because I see that changes BLE_L2CAP_MTU_DEF higher than 23 follows that sd_ble_l2cap_tx ... (more)

47
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1
vote
1

## How can I found out my NRF51's device Address? (with Softdevice using Random static address?)

How can I found out my NRF51's device Address? (with Softdevice using Random static address?)

Does Softdevice has any API for fetching my device's BLE Address?

As I Know, default Softdevice address has Random static address, and It ... (more)

52
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1
vote
1

## How to save data persistently(non-volatile) to nRF51 core not effected by powering off and on?

How to save data persistently(non-volatile) to nRF51 core not effected by powering off and on?

(How to save static data persistently without deleted when the core is turned off and on?)

I think there is some kind of an ... (more)

49
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1

## Communication between nrf52

hi, i was looking for example of two nrf52 communication. One is central of course and other one is peripheral. But i have following doubts. 1. If one is central then how peripheral device will connect to central? Are we ... (more)

44
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## SDK12.2 nrf_delay_us 32MHz

Hi,

I use nrf51822 with HF XTAL Frequency of 32 MHz

I am migrating from SDK9 S110 to SDK 12.2 S130 and have a problem that the code stop on nrf_delay_us.

#ifndef CLOCK_ENABLED
#define CLOCK_ENABLED 1
#endif
#if  CLOCK_ENABLED ...
(more)

34
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2
1

Hello, I want to bring some data by UUID. I know the ble_nus_init() can set UUID and I know it was set by sd_ble_uuid_vs_add(). But this way only change the UUID while chip start up. If I want change UUID ... (more)

51
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1
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1

## why most of the examples of sdk 12's sdk config file has diffrent options?

why most of the examples of sdk 12's sdk config file has different options?

I'm trying to build an application that has Central and Peripheral Role application (and it needs to relay between two role), but when I ... (more)

34
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1
vote
1

## How to change Peripheral Role to Central Role without having concurrent Role?

How to change Peripheral Role to Central Role without having concurrent Role?

I know S130 Can have 8 Concurrent Role as Central, Peripheral, Observer, Broadcaster.

But I'd like to make one Single Role, not as an concurrent Role.

For ... (more)

21
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## Multi packets in SDK 7.2.0 bootloader

Hi, We are doing DFU updates through a nrf51422 dongle (data passing from UART to BLE), using our own code, based on the multilink central example.

The DFU peripherals are nrf51822, s110 7.0.0, SDK 7.2.0. The ... (more)

32
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1

Hi, When compiling my program on SEGGER embedded studio I get the error:

  Compiling ‘main.c’
main.c
expected expression before '{' token


In the code:

    #define ADC_RIGHT   ADC_CONFIG_PSEL_AnalogInput2
#define ...
(more)

84
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1
vote
1

## sd_ble_enable returns NRF_ERROR_NO_MEM

Hi, I am working on the examples\ble_peripheral\ble_app_uart sdk 12 example on SES.

I was first setting:

FLASH_START=0x1B000
SRAM_START=0x20001EB0


Then tried with app_ram_base value, which is:

FLASH_START=0x1B000
SRAM_START=0x20001FE0


In both cases the function sd_ble_enable returns ... (more)

47
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no
2

## Flash and debug using eclipse and GNU

Hi,

I used the code ble_app_uart_c on board 10028 as a base for my custom board.

My board is nrf51822 QFAA based so I changed all occurances of nrf51422 to nrf51822 and xxac to xxaa on the makefile. I also ... (more)

42
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1
vote
1

## Ble_app_hrs configuring serial monitor

I have a project that I am updating from nordic sdk 8.1 to 12.2. I was using the ble_app_hrs when on 8.1 and am now using it as a base in 12.2 also. In 8.1 ... (more)

269
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1
vote
1

## won't reset chip after dfu

Hi,

I am using keil uvision 5.17, SD 130, nRF 51822, dualbank bootloader.

I have programmed own application and merged bootloader, application, soft device.

I can do dfu as many as I want,

but the problem is I should ...

(more)

67
views
1
vote
1

## fs_store data lost after power off

Hi

I'm using fs_storage function to read and write in flash memory. Value successfully stored in evt->store.p_data but after power off it value become 0

switch(evt->id)
{
case FS_EVT_STORE:
if(result == FS_SUCCESS)
{
stored_data = evt->store.p_data ...
(more)

27
views
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1

## does s130 multilink support non-nordic ble peripherals

hi experts, I want to build a ble center based on s130 to collect sensor data from several peripheral devices. Some of them may not be from nordic solution, such as TI. so, i wonder if it's supported to ... (more)

26
views
1
vote
1

## Reject when whitelist empty [closed]

Is there a way to reject requests when the whitelist is empty? I support clearing out the whitelist, but after clearing out the whitelist I would still like to reject connection requests. Is there a way I can do this ... (more)

69
views
2
1

## Could not find SD Card (SDCard) library and example in Keil IDE after nRF5 SDK 12.2 Keil4 installation

Hi,

after unzip, I could see the SDCard library under "<Nordic Project>\nRF5_SDK_12.2.0_f012efa\components\libraries\sdcard"

I am a Keil user, so I ran ... (more)

91
views
1
vote
1

## BLE400 compatible with PCA 10028?

I'm trying to following example of nRF51_SDK_v12 OTA-DFU Example, but there are no support with BLE400 at all. (BLE 400 has nrf51822 QFACA1 1536EK Chip on it)

I think this board is pretty similar to PCA10028 DK Board, But ... (more)

75
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2

## Can't run modified nrf51-DK example on custom board

Hi. I took the ble_central/experimental/ble_app_blinky_c example and modified it for my needs. It works on the nrf51-DK. Now I want to use it on a custom board with nrf51822qfab. I modified the Makefile in the following way:

changed ... (more)

123
views
1
vote
1

## question about scanning in ble_app_hrs_rscs_relay which is always disconnected with heart rate monitor?

When i use ble_app_hrs to connect with hrs demo(ble_app_hrs example), everything is ok.But when i connect to a heart rate monitor, it always disconnect.The print information is:

[APPL]: 180d


Heart rate service discovered

Battery = 100 %

Battery = 100 ... (more)

48
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no
no

## DFU CRC error

Hi,

there are similar questions to this but I cannot solve my problem. I am trying to upload a new code using DFU by means of a smartphone (using nRF Connect) or PC (using Master Control Panel), without success. The ... (more)

89
views
no
1

## Central - use public address

Hi. I'm new to Nordic BLE devices. Using the nrf51-DK. I have a peripheral device (non-Nordic) which I want to connect to from a Nordic central (S130) using the public address. It seems that by default the address used ... (more)

125
views
no
1

## BLE + ADC + Timer

Hey everyone. I'm trying to read ADC value from sensor and send it via ble.

I use timer to get the value from sensor every 5 seconds, however ADC interruption correlates with BLE interruption and I get an error ... (more)

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