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# 521 questions

Tagged
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17
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no
2

## No sdk_config.h file for Application Timer Tutorial

The app_time_tutorial.zip file I downloaded for the Application Timer Tutorial does not contain a sdk_config file despite the #include "sdk_config.h statement included in multiple files. Therefore, the project does not compile, and throws multiple instances of this error ... (more)

30
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1

## can't discover nRF52832

Hello. Engineers. I'm a beginner in nRF52832, I'm looking for someone who can help me. I have nRF52832 development kit. I tried examples blankly with SDK14.0. It working well. examples are correct. After power on board and ... (more)

8
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## SDK14.2 DFU power cycle issue

Situation: Trying to upgrade previous versions of the SD and BL (V3.0.0) to (V5.0.0) Problem: device power cycles after a new application is flashed to the device into the V5.0.0 SD and BL.

Steps ... (more)

54
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1

## getting millis from startup

I need to count millis from nrf52 start

I have seen that all are using rtc1 but I did not find any example from which i can integrate it to my project.

10
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## Bootloader SDK14.x [closed]

I have recompiled the secure boot loader, s132 and it works great on the dev board but not on my board. The difference in boards is minimal with the exception of the fact we don't use a LF XTAL ... (more)

82
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1
vote
1

## Giving read permission of a characteristic to a specific connected peer in multiperipheral device

Hi,

I am using multiperipheral configuration. I want a characteristic to be read by only a specific peer among connected peers. How do i recognize and authorize this specific peer every time it connects.

I am using PCA10040 , S132, SDK ... (more)

51
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2
1

## How I can load the Bluetooth 5.0 (BLE Mesh) stack in nRF52832 chip?

Hello Sir / Madam,

I want to load the BLE 5.0 (BLE Mesh) stack in nRF52832 chip.

Where I can find the latest Bluetooth 5.0 (BLE Mesh) stack on internet? Can you suggest any link to download the stack ... (more)

28
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## SDK 14.0.2 multirole lesc segger embedded studio project

Hi,

I am using the sparkfun nrf52832 breakout board with segger jlink and softdevice 5.1.0, I am not using the DK board.

I modified the BLE peripheral uart ses project and added the necessary includes and files to ... (more)

44
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1

## A few questions about getting started with crystals.

Hi to everyone!

It's the first time I use and program clocks in a device. I'm very lost with crystals, power management and this stuff.

I have a custom board with two crystals: one is high frecuency and ... (more)

13
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## NRF_ERROR_NOT_SUPPORTED when adding GATT service changed characteristic

I would like to be able to use the Nordic Connect app for debugging and be able to observe the current UUIDs/handles of my attributes as I change them.

I have attempted to connect a perihperal and refresh the ... (more)

74
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1

## UUIDs and handles for old attributes do not reflect new values on flashing

I spent a few hours trying to change the base UUID and handles of the attributes of the Blinky peripheral app, just the one service and the button and LED characteristics (three attributes total plus the base UUID in the ... (more)

48
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1
vote
1

## ERROR 4 [NRF_ERROR_NO_MEM] in nRF52832

I'm using nRF52832 SDK board with softdevice s132_nrf52_5.0.0. The error appears when I try to load it to the board, right on line 1247 where it initializes the NUS service (nordic uart service).

static void services_init(void ...
(more)

35
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no

## Why UART packet is terminated due to NULL character?

Is there a way around the issue where bluetooth communication acting as a pass-though terminates the packet whenever null character is found in the packet.

SDK: nRF5_SDK_12.0.0_12f24da

27
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## how to check adv, connect in peripheral ?

Hi,

(1) I look for some methods that suggests is application flag to record. but I set this ble_adv_on_disconnect_disabled = false;. How do I check ble state when disconnect ?

(2) I see the Advertising Module in nordic Semiconductor Infocenter. I wonder ... (more)

21
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1

## ble_app_gzll Power utilization

I'd like to run the DK in at the lowest power in SYSTEM_ON mode.

It's my understanding that the ble_app_gzll example places the system in the "low power" SYSTEM_ON mode. However when measuring the current using an oscilloscope ... (more)

158
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5
1

## Theoretical throughput doesn't match experiments done via ble_app_att_mtu_throughput example

Hi guys,

Right now, I'm trying to do some throughput measurements via the experimental ble_app_att_mtu_throughput example. This using the SDK 14.2 and S132 on two nRF52832 DK's. Alongside that, I'm trying to couple these experiments to ... (more)

28
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## Writing and notifying from the same characteristic

Is there a problem with writing-to and notifying-from the same characteristic? Or is it recommended that one create two characteristics, one for receiving data, and the other for transmitting? Is this less of a concern for Android then the NRF52 series?

Thanks

24
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3

## iBeacon in Eddystone Exemple

Hi, I'm student in the university of "Paris-Est-Creteil" i saw your profil in Arm Mbed page. I have a project to do with nordic nrf52 and i'm using ARMMbed platform. So i want to modify Mbed-os-BLE-Eddystone Service projet ... (more)

546
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3
5

## <error> ble_gatt: sd_ble_gap_data_length_update() (request) on connection 0x0 returned unexpected value 0x13.

Working on migrating my application from sdk 12.2 to sdk 14 except for some flash issues most of it seems to be working as before, except I notice this message in jlink:

 0> <info> app: Connected
0> <error> ble_gatt ...
(more)

87
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## Why BLE_LBS_C_EVT_DISCOVERY_COMPLETE is called NRF_SDH_BLE_CENTRAL_LINK_COUNT number of times

In multi-link central app, after BLE_GAP_EVT_CONNECTED event, BLE_LBS_C_EVT_DISCOVERY_COMPLETE is called NRF_SDH_BLE_CENTRAL_LINK_COUNT number of times.

So For example, I change NRF_SDH_BLE_CENTRAL_LINK_COUNT from 8 to 6 then BLE_LBS_C_EVT_DISCOVERY_COMPLETE is called 6 times.

This is confusing, and I can't track down why ... (more)

36
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1

## Debug NRF52832 + SoftDevice S132 undo Keil v5

Dear experts,

I'm a new user of NRF52 technology and I use:

• Keil µVision v5
• NRF52832 (PCA10040)
• Keil software pack 8.15 from Nordic Semi
• debugger Cyclone FX from PEMicro

Can you help me please for the following questions ... (more)

31
views
1
vote
1

## Difference between attr_char_value.init_len and attr_char_value.max_len

Hi,

When creating and adding characteristic to service, what is the meaning and difference between these two variables:

attr_char_value.init_len
attr_char_value.max_len


To give context, my aim is to write a value of variable length to a characteristic. I have ... (more)

32
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no
1

## how to change nrf 52832 WDT timeout

SDK： nRF5_SDK_11.0.0
Softdevice： s132_nrf52_2.0.0_softdevice

I set the WDT timeout in the application is 5s, when entering the BootLoader set the WDT time is 10s, how should I set? I try to set this up:
(more)

58
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no
1

## mpu9250 magnetometer zero readings [closed]

hi,

10040 nrf52dk softdevice 132 v2. keil ide I am trying to read magnetometer values so that i can calibrate it using this method. For this to happen, i need magnetometer, accelerometer and magnetometer values. However, im not able to ... (more)

35
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no
1

## How to update a 32-bit word in flash - SDK13.1

Hi everybody,

I was looking for a better way to update a data, like a 32-bit-word, without the need to erase the entire page. Part of this question is already been asked HERE but for some different reasons has not ... (more)

16
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no

## saadc ble communication

hi, I need combine to SAADC with BLE interface. The following is the code I have written. However, I'm unable to transmit information via bluetooth. Can anyone help me with it? I'm using nrf52 dk with pca 10040 ... (more)

82
views
1
vote
1

## Macro compilation in C++

I am porting a C++ project that was using version 6 of the SDK to version 14.2 (big leap, I know). I want to use all the new bells and whistles from the new SDK that makes life easier ... (more)

67
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no
1

## Issue with MPU9250 and nrf52

Hi,

I have been working on MPU9250 examples given in here.Though the program runs fine in KeilUvision 5, the output in tera term shows only 0,0,0 for Accelerometer values in X,Y and Z. I connected the ... (more)

40
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no
1

## mpu9250 mpu setup- infinite loop

Hi,

Im using nrf52 dk of pca10040 of softdevice 132 with sdk version 11. I'm working on MPUexamples. The codes used to work few days back but now, it no longer works properly. After loading it for multiple times ... (more)

26
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no
1

## Processing of unexpected Handle Indication messages?

I am using PCA 10040 development boards with soft device version s132_nrf52_3.0.0 to investigate Central/Peripheral communications.

A PCA 10040 acts as a Central making connections to two peripherals, one peripheral is another PCA 10040 board and the ... (more)

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