# 27,082 questions

17
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## Monitor mode debug w/ nRF52840, SES 3.3, SDK14.1.0, BLE S140

Hi,

Is anyone successfully using MMD with the nRF52840 PVK, SES 3.3, recent SDK (e.g., 14.1.0) and S140 softdevice?

I followed the steps in this blog post both on Win10x64 and under Ubuntu 16.04x64, but ... (more)

17
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## how to set mesh model publish address to a client model which is on other mesh node

I have three mesh nodes in a mesh network, a provisioner, a vendor server model, and a vendor client model.

I know that a provisioner can set client model publish address to a server model address via access_model_publish_address_set(...) if the ... (more)

39
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## Recommandation to quickly test long range and RSSI with nRF52840

HI,

I got 2 nRF52840 dev kits and I'm interested in testing the long range layer (LE coded PHY ) between the 2 modules, also scan for the second module RSSI value.

I was thinking if you can recommend some ... (more)

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## Softdevice Update Procedure

Hello,

For the softdevice update, is it the responsibility of the bootloader to make sure, that the softdevice was copied correctly?

If for example the bootloader calls sd_mbr_command() and the device powers down during that copy operations. Is it's ... (more)

25
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## nRF52840 SAADC real impedance 4,7K ? [closed]

Hi Engineers!

faced with a problem of SAADC impedance too small (4,7K)! We use SINGLE ENDING 8bit mode with following settings:

• Vdd = +3.3v

it means, INPUT RANGE = (VDD/4)/(1/4) = VDD = 3 ... (more)

12
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## Key Fob Beacon

Does anyone know of any nRF52832 devices designed for use as a key fob?

The Thingy52 looks great but it's a little big and I don't need all of those sensors. Also, I'd prefer not to develop ... (more)

17
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## PCB antenna and J1 connector

Hi all,

I'm trying to measure the transmit power of nRF51 development kit with a spectrum analyzer and I am facing the following issue:

It is specified in the user guide of nRF51 that "When connecting the test probe ... (more)

23
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## Eclipse version

Hi, I recently purchased nrf52 development board for debugging nRF52832. I was following your tutorial "Development with GCC and Eclipse" and it is not working for me. Can you tell me the version of eclipse you used in the tutorial ... (more)

15
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## IoT SDK 1.0.0 - DFU with IoT File - PStorage?

Hello Dev Zone,

We've been using the IoT SDK 0.9 all year and recently ported to the production release bundled with the SDK 14.1 package.

We have the DFU working with the SDK 0.9, which is ... (more)

155
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## Zephyr Bluetooth Mesh development

I think Zephyr OS has better support for "Bluetooth Mesh" than Nordic own MESH SDK.

https://github.com/zephyrproject-rtos...

Using this kernel version, I flashed \$zephyr/samples/bluetooth/mesh this example into three nRF52840-PDK boards. Now each board is advertising ... (more)

19
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## Previously bonded device disconnects.

I have an nrf52832 BLE HIDS device based, with the connection and peer handling code copied from the hids keyboard example, SDK13. I use Windows 10 as host. Setting up a connection works fine, but when I remove the device ... (more)

27
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## PM_EVT_CONN_SEC_CONFIG_REQ

I plan to keep the bonded device information in the ring buffer, but there are a few things that puzzled me:

When PM_EVT_CONN_SEC_CONFIG_REQ event is received, .allow_repairing = true, then pm_conn_sec_config_reply, for this peer device,

1, its peer id will be ... (more)

6
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## nRF24LE1 does not power-up without reset

Hi,

I have a nRF24LE1 development kit and a starter kit. If I turn the power off and turn the power back on using the power switch S9 on the motherboard. The nRF24LE1 chip does not power-up. I need to ... (more)

27
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## Timer Prescaler - SDK Config

I am using nrf52832 with softdevice s132 v3.0.0, sdk 12.2.0 and FDS.

I am using sdk_config.h to configure various modules in my project.

Earlier config: Using Timer1, Timer2 with TIMER_DEFAULT_CONFIG_FREQUENCY = 4 Timer1 = controls main state ... (more)

11
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Hello,

I added an extra opcode to the DFU Control Point characteristic so that I can jump to the main application by writing to it. The problem is that whenever I do that, the bootloader freezes (it doesn't reset ... (more)

18
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1
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1

## Problems with TWI and NRF_LOG_DEFAULT_BACKENDS_INIT() at the same time

Hi

I discovered I strange behaviour using twi. I am using sdk-14.2.0, and Segger Studio. I started with the twi_scanner projected that I found in examples/peripherals. I have shortened it to demonstrate the problem I discovered.

The ... (more)

33
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## How to achieve low interrupt latency from sleep ?

Hello, i'm using a nRF52840 on a PCA10056 and want to wake up from __WFE() with a minimum delay. When i'm using the debugger, i achieve a low latency but without the debugger, the latency is increased by ... (more)

35
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1
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1

## Storing persistent data in nrf51dk

I will need to store some data (and edit it again later) and fetch it later in the nrf51dk even after turning it off and back on.

How can I store such persistent data in the development kit?

31
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## How to configure interrupt on gpio pin to detect button state.

Hi Team,

I am using sdk12.2.2 and nrf52. I want to use one gpio to detect button state & have to operation on that event.

I used one method to configure(code snippet written below)

nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(true ...
(more)

20
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## More Data to receive from nRF ToolBox uart

Hello,

I want to receive the More data (>20 bytes) in nrf51822 Board from the nRF ToolBox UART module.

is this possible?

What will be changed to be done in peripheral side? please suggest me....

Thank You

43
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## uart's power consumption

use the SDK5 14.2.0, NRF52832, pca10040, the ble_peripheral\ble_app_uart\pca10040.
first, UART_EASY_DMA_SUPPORT = 1, run the uart_init(); the current is 1.2mA;
UART_EASY_DMA_SUPPORT = 0, run the uart_init(); the current is 0.29mA;
UART_EASY_DMA_SUPPORT = 0, no run the uart_init(); the ...

(more)

46
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## how to discover 16bit uuid?

Hi. i'm using nRF52832, SDK13.0.0. I'm developing Central, Peripheral both.

If peripheral just has 16bit UUID. It doesn't contain base UUID. Or if i don't know what peripheral's UUID is, how can I ... (more)

14
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## Do interrupts needs to be disabled before erasing / writing flash?

The NVMC documentation states the CPU is halted while the NVMC is writing or erasing flash. If the CPU is halted, then interrupts shouldn't need to be disabled during flash operations, correct? I'm asking because other micros will ... (more)

20
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## how to connect nordic thingy 52 with ble central example ?

i want to connect Nordic thingy to a nrf 52840 soc with ble central example.

all i want to get is thingy environment service and get temperature and humidity values on ble central device.

please, help me out how to do it.

14
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## SPI from BLE event

Hi, I am using SDK14.1 with nrf52832 and want to write to eeprom memory over SPI from BLE characteristic call.

My spi module works and everything was working fine until i tried to write something to eeprom over BLE ... (more)

65
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## How to modify the frequency offset by software?

Hi All: i made a nrf52832 board, but i test it, the frequency offset is 150K, it's too big. what can i do to change it by software ?

14
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## How to reinitialize advertising ?

Hello, I use nrf51822 , sdk 8.0.0, s110

I defined advertise interval and timeout

#define APP_ADV_INTERVAL                         320


Also, I write advertising init function at below;

static void advertising_init(void)
{

.
.
.

options ...
(more)

54
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1
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1

## Possible bug in AES CCM example

Torbjørn Øvrebekk from Nordic has made an example showing how to use AES CCM HW. It does "work" self-consistently during encryption & decryption. However, I think I found a critical bug that the AES-CCM operations may not actually doing correctly.

typedef ...
(more)

8
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## Question about nrf_drv_pwm_simple_playback based thingy52

I am build a sound client project

when I received the data from the thingy52（which is sound server device）

the I play the sound by function drv_speaker_ble_pcm_play directly without use the drv_speaker_tone_start function

the result has so much noise ... (more)

11
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Hi,

I am using the nRF51 Dongle (PCA10031, V 1.1.0) and pc_ble_driver.py to create a custom script for testing purposes. But there seems to be a maximum limit for the measured RSSI? Is this correct, or is ... (more)

#### Statistics

• Total users: 25341
• Latest user: Felipe Nickel
• Resolved questions: 10980
• Total questions: 27082

## Recent blog posts

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