# 249 questions

Tagged
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234
views
no
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)

41
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)

18
views
no
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)

21
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)

60
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)

64
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)

66
views
no
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)

105
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)

43
views
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)

76
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)

100
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)

42
views
2
1

## NRF51822 IRAM1 Settings (multilinkCentral Projects)

Hi, Im using Nrf51422 DK board. When I try the ble_app_multilink_central example in the SDK12, it works on the DK board. But it does not work in NRF51822. (NRF51822 QFAA)

I tried the settings on this link but it ... (more)

77
views
no
1

## NRF51822QFACA10 can not use nrf5_sdk_12.0.0_12f24da

now i want to use the lastest nrf5_sdk_12. But I find that the example did not work. The fellowing is my configuration.

74
views
no
no

Hi,

I have seen similar questions to this, but I could not make it work. 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 ... (more)

57
views
1
vote
1

Hello ! I am trying to implement a write request but for unknown reason it doesn't transmit back the gatt_status. I have setup the wr_auth = 1. GPIO number 19 si actually a LED and it blinks every time I make ... (more)

42
views
3
1

## Detect which handle needs to be notified to the BLE Client

I have custom service, where I have declared 2 handles inside BLE Service structure, one for button action and the other for custom battery ADC measurement, each identified by its characteristic's UUID:

ble_gatts_char_handles_t    button_char_handles; /**< Handles related to the Button ...
(more)

42
views
no
no

## nRF51822 PWM and GPIOTE: differrences between Keil MDK(ARMCC) and GNU_GCC_ARM Compiler

Hello everybody!

I have a problem with compilers for nRF51822. My problems: I create a pwm signal ~38Khz, duty 30% at pin 30 of nRF51822. This process is work well. I want use the function:

to ... (more)

138
views
no
no

Hi,

I'm developing simple bluetooth app, where I'm using 3 custom services, each one has characteristic with notification option.

But only the first service notification is working. The other 2 characteristics send notification without error (device side), but ... (more)

40
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no
no

## Flash SoftDevice won't build

Hi everyone. I've been having a bunch of trouble with the BLE examples being incredibly slow. However, I recently started encountering a problem where the flash file wouldn't compile, and by now it won't compile at all ... (more)

118
views
no
no

## Disconnect on S130 v2, HCI Error 0x2A

Hello,

I've an issue with several smart-phone models when I use the softdevice S130 v2

I did tests with PCA10028 and the example "ble_app_bps".

I used softdevice S110, S130 V1, S130 V2.0.0, S130 V2.0.1

This ... (more)

216
views
3
1

## UART debug logger

Hello,

I am using SDK v12.1.0 and I want to get the debug logs over UART

I followed the Logging Sink Configuration to enable UART logging and compiled the Health Thermometer Service example, which has statement like NRF_LOG_INFO ... (more)

49
views
no
no

## central uart MAX_CONNECTIONS

Hi,

I am using ble_app_uart_c_S120

How can i support more then 1 bonded connection?

i try:

#define DEVICE_MANAGER_MAX_CONNECTIONS   7
#define DEVICE_MANAGER_MAX_BONDS         7

but it is not always works, maybe i miss something else?

Thanks

155
views
no
1

## DFU: REMOTE DFU OPERATION FAILED

During DFU with the nrf Connect app I get the error REMOTE DFU OPERATION FAILED. Here is the log file: http://pastebin.com/y7hFNSBq

• Using NRF5 SDK12 / NRF51 DK
• I have created the zip with nrfutil using the same key ...
(more)

39
views
no
no

## Discovery getting BLE_DB_DISCOVERY_SRV_NOT_FOUND

Hi everybody,

I am designing a beacon that works with s130 and can act as peripheral or central. This beacon has two custom services, and can connect to two different devices as a central:

• It can connect to another equal ...
(more)

59
views
1
vote
1

## NRF_ERROR_INVALID_STATE cases

Hello,

I am using nrf5 sdk 12, and I have read the documentation in ble_gap.h for NRF_ERROR_INVALID_STATE and I have seen a few questions on this forum, and what I understand is NRF_ERROR_INVALID_STATE is an error which needs to ... (more)

85
views
1
vote
1

## peer manager limit number of peers [closed]

How do I limit the number of peers that are stored in the peer manager? I don't see a configuration variable. I don't know the addresses of peers before hand, so I don't think the whitelist can ... (more)

483
views
no
2

## Creating zip file for DFU in linux, nRF5 SDK11.

How can I create zip package for DFU in Linux. I'm using nRF5 SDK version 11. I'm working in Linux(Ubuntu 14.04).

I'm trying to zip package file for DFU in linux. When I create zip ... (more)

97
views
1
vote
1

## SPI manually select CS pin

Hello ! How can I configure nrf_drv_spi with me writing the CS pin to LOW and HIGH whenever I want to address a different peripheral ?

70
views
2
1

## S130 Fatal Error after PPI initialization

When I initialize PPI after timer1 has been initialized I get a fatal error (and reset). Code:

const nrf_drv_timer_t timer1 = NRF_DRV_TIMER_INSTANCE(1);
nrf_ppi_channel_t ppi_channel1;
static void timers_init() {
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
timer_cfg.mode = NRF_TIMER_MODE_COUNTER;
timer_cfg.frequency = NRF_TIMER_FREQ_125kHz;
NRF_LOG_INFO("Timer init\r ...
(more)

59
views
no
no

## How to write to CCCD in another node?

So I'm still trying to get my way around the DFU service implementation, and I'm currently having trouble with the first step, which is to enable the control point notification (Write 0x0001 to CCCD).

I checked the Characteristics ... (more)

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