# 25,452 questions

30
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1
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1

## why can't i program nrf51 device using the example for nrf52 series?

Hi

I get the following error when i compiled the ssd1306 library from link text to my nrf51DK..

error is: ._build\nrf51422_xxac.axf: Error: L6200E: Symbol app_error_handler multiply defined (by app_error.o and main.o).

anyone knows what could be ... (more)

21
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2
1

## Error when making custom makefile for BL Mesh project

I am building a Bluetooth Mesh project and when trying to make a custom Makefile for the Mesh Light Control Example, but when compiling the project i get this error:

Compiling file: nrf_mesh.c
In file included from ../../nrf5_SDK_for_Mesh_v0.9 ...
(more)

28
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no
1

## Any one please hell me to devlop a simple code with nRF 51824?

I am new in this devlopment is any 1 having a simple samlpe codes like LED blinking or any Please help me that !

Thanks.

48
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no
no

## Problems to add more services next to NUS

Hi there,

In my SDK12- SD132 NRF52 app, I'm running NUS ok, and I want to add two more services. So, I made this changes at ble_stack init:

ble_enable_params.common_enable_params.vs_uuid_count =4;
ble_enable_params.gatts_enable_params.attr_tab_size = 2000;


In services_init function ... (more)

61
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1
vote
1

## Park mode in nRF51822

Hello,

This is Milav Form Teq Diligent,India.

I read the Bluetooth core 4.0 pdf.

In that they defined the "Park State" .

is this state are available in nRF51822 chip?

and if yes than what is configuration needed for ... (more)

38
views
1
vote
1

## nRF52 SPI loops when waiting for NRF_SPI_EVENT_READY after initialisation [closed]

So I switched from Bluemod+S (nRF51822) to Bluemod+S42 (nRF52832) on my custom board and am trying to adapt my existing code to work on the newer model. Apart from various obvious and some not so obvious changes I ... (more)

36
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no
1

## How do Mesh nodes return data?

Hi, Do you know how to make the nodes in the Mesh send back the data to the main device? For example, a node is a sensor that gets a new value and now needs to send the new value ... (more)

51
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1
vote
1

## NRF51822 Capability

I'm trying to figure out if the NRF51822 is capable of performing the tasks I need for my project. I need to be able to do the following

4x PWM at ~2kHz

1x Periodic ... (more)

21
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no
no

## Examples decoding bv32fp

Hello,

Are there any examples of decoding sound stream using bv32fp? I try to play with thingy firmware and I'm able to easily change the codec, but I can not find a way to decode it on e.g ... (more)

50
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1
vote
2

## nRF Connect on Windows PC - any way to continuously scan?

Would like to get continuous advertising data from a known device ID - without connecting. Would like to do this on a Windows PC. I don't see a way to do this with nRF Connect - any ideas?

37
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no
1

## conrrent consumptio active and idle mode

Hello,

We are working with the one potential customer . they are working on battery connected beacon project below are the some queries

1) customer using nrf51822 soc and he wants interface with gps module . customer will be sending around 80bytes ... (more)

77
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no
2

## NRF51 with PTR5518 range problems

Hi friends,

I'm using a NRF51 IC with this 4.0BLE Modul PTR5518 and i have big problems with Range. As a protocoll i use gazell. In air it is possible do get some correct signals up to 6-7 ... (more)

52
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1
vote
2

## IS mass firmware up-gradation via ble ota possible?

Hello, I want to upgrade all my ble devices (15000 beacons ) at the same time using OTA dfu. Is that possible? If yes how can I do that? Thanks,

18
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no
1

## fstorage compilation problem

i am compiling an code just to store a data to flash and retrieve it. i wrote the code for that i included fstorage.h,section_vars.h and added fstorage.c. I am not using any soft device now but ... (more)

370
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10
1

## On SDK 14.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)

36
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1

## How to interpret first 8 bytes of ble_l2cap_evt_t.rx.data (SDK v11 SD130 v2)

Hello

I'm trying to track lost packets in a connection by showing the sequence number of each packet received. Specifically it's about an application that sends new measurements in 3 packets each connection interval. Some measurements are divided ... (more)

30
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1
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1

## 6LoWPAN with Android/iOS Mobile devices

Hi, I'm trying to create a local network between an nrf51-DK and a mobile phone, android or iOS. I've tried some examples from the IoT SDK, and the BLE connection is successful, however the interface never goes up ... (more)

19
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no
1

## nrf_ble_gatts_c.c does not call NRF_LOG_MODULE_REGISTER()

_build/app/nrf_ble_gatts_c.c.o: In function nrf_ble_gatts_c_on_db_disc_evt':
nRF5_SDK/components/ble/ble_services/experimental_gatts_c/nrf_ble_gatts_c.c:187: undefined reference to m_nrf_log_nrf_ble_gatts_c_logs_data_dynamic'
_build/app/nrf_ble_gatts_c.c.o: In function on_disconnect':
nRF5_SDK/components/ble/ble_services/experimental_gatts_c/nrf_ble_gatts_c ...
(more)

61
views
no
1

## Shielding requirement for nRF52832

Hi All,

We are working on nRF52832 custom PCB design. We are having a small concern for shielding. Do we need to provide shielding for nRF52832 based boards for FCC certification or we can leave it as we are already ... (more)

23
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no
1

## Multiple manufacturer specific data sections

Hi,

In nRF5 SDK v14, in the file ble_advdata.h, there is a routine to create advertisement data from a ble_advdata_t struct that is passed. This struct allows only 1 manufacturer specific data section. I also noticed in the iOS ... (more)

25
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no
no

## SDK14: determine what modules to link/enable

Hi!

I once set up a simple project using SDK 12 and the HRS example.

Now I tried porting it to SDK 14 and SD 5. That didn't work out well.

So I started things from scratch. I now ... (more)

20
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no
1

## BLE 4.2 softdevice s132 v 2.0.0 and client

Hi all,

i have a question about the communication client and server. I'm using for my project a nrf52 and softdevice s132 v2.0.0, reading the datasheet i can understood that it use ble 4.2 version 2 ... (more)

27
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## After disconnected, why does electric current increase ?

Now facing the problem "After disconnected, the electric current increases"...

I think softdevice is working hard even after disconnected when connecting once. Could you tell me how to back to the calm state of softdevice by sd function(s)

Is ... (more)

67
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1
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2

## Do we support BLE long range feature on nRF52832?

Dear Nordic, I see nRF52832 already support Bluetooth5 on-chip from your offical website, we want try a long range case, but not find the relate code, is it supported on nRF52832？ Thanks.

25
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no
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## Thingy52 upload Sample Project OTA

Hi everyone,

I have moved from the cable connection firmware upgrade to the OTA-DFU using the nRF52 dev kit. I am able to download the firmware from nordic's website and upload the pre-zipped file without any issue. I start ... (more)

22
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no
no

## Power Optimized FreeRTOS? Any examples?

Are any of the freeRTOS examples Power Optimized? I've looked into other related posts but not sure anyone is seeing the same issues I'm seeing. I'm using a Rigado BMD300 and I can't get it to ... (more)

45
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1
vote
1

## UART Service instant overflow [closed]

I'm trying to create a program that takes a stream of UART data at 115k baud streaming in and sends it over BLE as fast as possible. So far, I've

(1)Verified/ made some tweaks to the Nordic ... (more)

49
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1
vote
1

I am working on S140 on nRF25840. I am using the ble_app_beacon sample. I want to set the advertising interval smaller than 100ms while using non-connectable mode. But the BLE_GAP_ADV_NONCON_INTERVAL_MIN stops me. I wonder if there is any reason to ... (more)

60
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3
1

## Do I understand BLE Connection Interval properly?

Hello,

I am trying to understand a bit better BLE throughtput in order to use it for my application, having read this Nordic Blog, this post and ATT_MTU Throughput Example

I have a question regarding to the parameter so called ... (more)

525
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5
4

## Full sdk_config.h somewhere?

Using SDK v12.2.0. Starting a new project with Segger Embedded Studio, I have to assemble an sdk_config.h` file. For example when using GPIOTE I first need to find an example project that uses it and extract the ... (more)

#### Statistics

• Total users: 24443
• Resolved questions: 10448
• Total questions: 25453

## Recent blog posts

• ### 6 Things to Know about Bluetooth Beacons

Posted 2017-09-22 08:27:00 by Rose Martin
• ### Creating a Keil project for a Bluetooth Mesh example

Posted 2017-09-19 12:08:11 by Kristian Skordal
• ### Using millis() like in Arduino.

Posted 2017-09-18 11:58:04 by schef
• ### Flashing nRF5x firmware using any dumb terminal program via standard serial COM port

Posted 2017-09-18 03:53:40 by Nguyen Hoan Hoang
• ### How to Debug the nRF52 Interrupts — Useful Tips

Posted 2017-09-13 15:15:22 by Yaniv Nis

## Recent questions

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Posted 2017-09-22 23:35:41 by alikob
• ### how to enter "power down" mode in nrf52832

Posted 2017-09-22 21:21:04 by Ed
• ### BPROT Protecting Bootloader nRF52832

Posted 2017-09-22 20:53:06 by superpak
• ### Issue using NRF_DRV_TWI_XFER_DESC_TXRX TWI master driver

Posted 2017-09-22 20:45:08 by Tgage
• ### Fstorage - fs_erase causes connection failure

Posted 2017-09-22 20:27:34 by John DeWitt