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# 25,453 questions

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## SDK 14 Makefile.common missing

I am trying to compile the blinky example in the SDK 14.

I am getting this error:

makefile:111: ../../../../../../components/toolchain/gcc/Makefile.common: No such file or directory

this directory is actually empty. I remember in SDK 11 this ... (more)

45
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2
votes
2
answers

## Application file encryption (.bin)

Hello we would like to upload to the cloud the nrfutil generated zip package, however we are worried about the application file security. As far as we know, nrfutils takes the unencrypted .hex file and generates signature in order to ... (more)

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## Can I combine beacon code and HID keyboard code?

I need an application that always advertise the beacon information, such as RSSI and Major and Minor value. At the same time I would like to transmit HID keyboard code. Is it possible to combine these two code? I read ... (more)

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## how to enter "power down" mode in nrf52832

Hello,

I was using the nrf24LE1 where i used hal_nrf_set_power_mode() to set the radios' power down mode. Options are power-up and power-down. This is when i was using the HAL_NRF library.

Now I am migrating functionality to the nrf52832 in ... (more)

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## BPROT Protecting Bootloader nRF52832

nRF52832 SDK14.0

Hi, how can I protect the bootloader from being overwritten? Ideally, I would never be updating the bootloader so it will be a permanent part of the device. How can I make sure nothing can overwrite/erase ... (more)

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answers

## Issue using NRF_DRV_TWI_XFER_DESC_TXRX TWI master driver

At the very end of this post from Nordic Info center I am doing the exact example at the very end.

http://infocenter.nordicsemi.com/inde...

This is the start to do a transmit read transaction ===>

nrf_drv_twi_xfer_desc_t xfer = NRF_DRV_TWI_XFER_DESC_TXRX(addr ... (more)

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## Fstorage - fs_erase causes connection failure

Hello,

I'm encountering a very strange problem while attempting to run an fstorage fs_erase operation on my peripheral device when the central is connected. This is on a nRF52832, SDK 12.1.0, SoftDevice S132 v3.0.0 and ... (more)

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5
votes
2
answers

## Programming external/custom NRF52832 board using NRF52-DK

Hi All,

We are trying to flash our custom NRF52832 board using NRF52-DK+nrf studio. With the same setup that's suggested by https://devzone.nordicsemi.com/questi...

However, from the nrf studio, we can never see the external board ... (more)

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1
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2
answers

## nRF52832 NRF_ERROR_BUSY from nrf_drv_twi_tx()

i used aplication twi_sensor form nRF5_SDK_12.3.0_d7731ad and i use s132.i conected mpu9060 every time get error on my terminl NRF_ERROR_BUSY.There is exemle of codemain.c and scren from terminal d324ssa42d3434234.png what i do wrong ... (more)

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## how to arm cross compile pc-ble-driver

Hi all,

I would like to know how to cross compile the pc-ble-driver-py for arm target. Do you please have a prooceding tutorial for this activity?

Thanks in advance and best regards,

7
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answers

## pc-ble-driver arm cross compiling

Hi all,

I would like to know a proceeding to compile the pc-ble-driver-py for arm processors. could you please show me how to do that?

Thanks and best regards,

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## Usage of Nordic Semiconductors proprietary UART service for commercial products

As stated in the topic. We use BLE to simulate UART. As for now, we have defined our own UUIDs but there would be more straight forward to use the well defined and used one by Nordic. However, is it ... (more)

34
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votes
1
answer

## light control mesh example not working

I'm trying to set up a ble mesh with 3 servers and 1 client on an nrf52 PCA10040 dev kit. Upon debugging, I'm getting an error that says: '64, APP_ERROR: C:\Users\sesa463145\Desktop\BLE\nrf5_SDK_for_Mesh_v0.9.2-Alpha ... (more)

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votes
1
answer

## Application compiles with no errors but still dosen't work?

I am building a Bluetooth Mesh application based on the Mesh Beacon Example, i have written a custom Makefile and got it compiling with no errors.

But when Flashing the nRF51422 with the program, nothing happens. If I build the ... (more)

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1
vote
1
answer

## uECC.h no such file or directory even after proper installation of microecc library

Hi, I have installed Software backend (micro-ecc) as given in: https://infocenter.nordicsemi.com/ind...

Compiled example: experimental/ble_app_multirole_lesc --> compilation is successful here.

Now i am want to include and use microecc library in my own example, I have modified ... (more)

34
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2
votes
2
answers

## SDK 14 buttonless dfu not building with gcc

I'm using SDK 14 and trying to build the ble_app_buttonless_dfu example. I'm using Linux environment, so gcc for building. When I try to build the example I'm getting an error as below,

Compiling file: ble_dfu_unbonded.c
/tmp ...
(more)

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votes
1
answer

## RSSI switching values

Hi, (I'm a computer scientist, please be kind)

In the below attached image, I have collected the data outdoors (so no signal reflection or signal fading) from a single BLE beacon at two different pre-set power levels. I see ... (more)

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## Printf on 52840 causes Hard Fault in _Balloc

Hey there,

I'm using the nRF52840 and have all sorts of problems trying to using dynamic memory allocation. I'm trying to develop on an example project from ./examples/ble_peripheral/ble_app_uart. Firstly I had to modify the project because ... (more)

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## Intersection of PDM Module with TWI Module

Dear Nordic team,

I have a running NRF52 with a firmware based on the freeRTOS demo. To this demo I added the PDM Support Module and the TWI Module. As soon as both sensors are available, I get very random ... (more)

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3
votes
1
answer

## how can I reinit micro sdcard with nrf52840 pdk

Hello.

This is my code to "wait until micro sd card is pluged".

while(1)
{
disk_state =disk_initialize(0);
if(disk_state==RES_OK)
{
NRF_LOG_INFO("Initialize Successful \r\n");
break;
}
else
{
disk_uninitialize(0);
disk_state = STA_NOINIT;
diskio_blkdev_t drives[] =
{
DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)
};
diskio_blockdev_register ...
(more)

15
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no
votes
1
answer

## Using stm32 disco board for flashing a custom nrf52832 chip with keil

Hello there,

I'm trying to flash my custom nrf52832 pcbs(untill I get my DKs in the tech tour with a reconfigured stm32 disco board's SWD port with keil uVision using the blinky blank example in SDK 14 ... (more)

1k
views
7
votes
1
answer

## nrf52 dongle

Hey there,

are there any plans for NRF52 USB development dongles (just like the NRF51 dongle)?

Thanks,

Jens

26
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no
votes
1
answer

## nRF51822 custom board is not radiating

I have made a custom board by following the reference design given in the nordic website using 2450BM14E0003 Balun and 2450AT18B100E chip antenna from Johannson technology.But after loading the program onto the chip, it is not radiating at all ... (more)

23
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votes
1
answer

## experimental ble blinky doesn't work

Hi everybody, I have an issue with my application, I use the nRF52832-QFAA with the following circuit, when I open the application Nordic 'nRF Connect', I detect the ble when I use the example from Nordic 'experimental ble blinky' with ... (more)

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answers

## ERROR:Connection Request Failed, reason 7

I am using a NRF52-based platform and have BLE code based on the ble_app_hrs_c Hear rate monitor system.

Having set up for scan, I see many device (we have a lot of beacons around).

I can also see the device ... (more)

10
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votes
no
answers

## Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

I am facing some issue, I am using HM10 ble module as peripheral and NRF52832 (Redbear NANO v2) as central device. I using SDK "nRF5_SDK_12.3.0_d7731ad" and example program "nRF5_SDK_12.3.0_d7731ad\nRF5_SDK_12.3.0_d7731ad\examples\ble_central\ble_app_uart_c". I ... (more)

32
views
no
votes
1
answer

## where can i find SDK's for BLUETOOTH 5 and does nordic has any IR generator boards?

Hi,

As of now i am using nRF52840 and SDK 14.0.0 and i can find only BLE examples and i wanted to work on bluetooth 5 where can i find examples?.

And i want IR generator boards does ... (more)

8
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votes
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answers

## Reading the Body Sensor Location characteristic

Hello i am using the nrf52840 with sdk 13. on the client side i saw you are catching the cccd_handle. for the heart rate characteristic. basically i am leaning the basic concept of data Transfer like characteristics.

how can read ... (more)

8
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answers

## Multilink Peripheral BLE Services

Hello,

for multilink client services Nordic introduced the *_EVT_DISCOVERY_COMPLETE events and the *_c_handles_assign functions. Like the BLE_BAS_C_EVT_DISCOVERY_COMPLETE event and the ble_bas_c_handles_assign function for the Batterie Client Service

What is the procedure for multilink server services like the Batterie Server Service ... (more)

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1
vote
2
answers

## nRF51 based Capture Dongle with nRF528x devices

Hello There, I found following dongle based on nRF51822. They claim same will work for bluetooth 5.0 also. I know BT5 devices are not backward compatible, so not sure if the device can capture BT5 packets.

Somebody please suggest ... (more)

#### Statistics

• Total users: 24443
• Latest user: Fredric Tulk
• Resolved questions: 10448
• Unanswered questions: 3306
• Total questions: 25454

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## 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

• ### SDK 14 Makefile.common missing

Posted 2017-09-23 00:25:45 by TY
• ### Can I combine beacon code and HID keyboard code?

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