25,465 questions

In the nRF52 datasheets there is a statement: "The 64 MHz crystal oscillator (HFXO) is controlled by a 32 MHz external crystal"

Is the crystal somehow oscillating at 2nd harmonic ? is there a frequency doubler?

How much is the oscillation ... (more)

I am writing firmware for a BLE Nano device using the Nordic SDK 8.1. I was having problems where my device would suddenly stop printing to UART and stop trying to bond with ble peripherals also. It seems like ... (more)

i am using uart of nrf52832. the SDK is nRF5_SDK_12.3.0_d7731ad. the uart is app_uart .when i was testing the uart sending and receing .i find that the uart is stoping where
while (!nrf_uart_event_check(p_instance->reg.p_uart, NRF_UART_EVENT_TXDRDY)) in ...
(more)

Hi

How stable is the RTT module and how trustworthy is it?

It is marked as unstable and I do not get any messages from the modules.

I use:

• #define NRF_LOG_BACKEND_RTT_ENABLED 1
• #define NRF_LOG_ENABLED 1
• #define NRF_SDH_BLE_LOG_ENABLED 1
• #define NRF_SDH_LOG_ENABLED ...

Hi!

I am getting a HardFault when I try to read a GATTs value inside a GPIOTE ISR handler.

I already tried setting the ISR priority to low as suggested in various posts.

Here is my code:

#include "app_settings.h ...

I'm migrating from sdk13 to sdk14 with work app. Can't solve one weird problem. When my app start first time I initialize some data with saving by fds library to flash. There were no any problem to do ... (more)

Greetings -

I am using (the slightly out-dated) 12.3 SDK with a nRF52840. I'm also using s132 as my softdevice.

As I've been slowly reducing my RTC interrupt frequency to cut down on power consumption, I have a ... (more)

Hi,

The tx/rx sequence diagrams don't explain when EVENT_ADDRESS and EVENT_END are triggered when using coded phy:

• there are CI and TERM1 fields between address and S0 so EVENT_ADDRESS is generated directly after address or directly before S0 ...

Hi

I have an application where I cannot use the FIFO buffers (HW or SW). Therefore I need an interrupt for each received byte. If I try to use the uart driver (nrf_drv_uart.c) I have problems enabling the RXDRDY ... (more)

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)

Hello,

I've been trying to program my nrf52832 board with an st link v2 dongle or an st32 disco board with no luck with eclipse(Didn't find a dedicated tut for using all) and found keil to maybe ... (more)

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)

Am building a HID Mouse device, starting with the nRF52-DK as hardware target and the BLE peripheral HID mouse sample app. Builds, loads and runs, apparently fine (i.e., can see target advertising with LightBlue app on an iPhone 6S ... (more)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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 ...

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)

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)