# 209 questions

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• x
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I'm having some issues getting any of the provided experimental Thread examples to compile with IAR version 8.11.2. I'm using an nRF52840-PDK with the SDK for Thread version 0.10.0. Please see the following image ... (more)

51
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1

Hi,

I'm trying to get the RSSI of incoming 802.15.4 packets using otLinkRawGetRssi(), but I need only RSSI from one specific device. I tried to use whitelist (otLinkSetWhitelistEnabled(), otLinkAddWhitelist()) and I checked in CLI that whitelist is ... (more)

31
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1

I noticed that when upgrading to the latest Thread SDK that my devboard stopped booting. I was following the instructions as per the documentation but noticed that my user application stopped booting. I was following the instructions to the tee ... (more)

191
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4

## nRF52840 over the air firmware/software update

Does nRF52840 support over air firmware/software update? Is there any white paper or app note available?

33
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1
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1

## looking for example Gazell project on Nrf52840

I am looking at using two Nrf52840 on Custom PCBs to create a wireless link from my product to a PC one 840 would be the host and would be wired to the PC using USB (HID,MSC,CDC) and ... (more)

65
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## Issue with SDK 13.1.0 Power management

Hi there,

I have nRF52840-Preview-DK eval board. I have downloaded the “SDK 13.1.0”. I was trying out the power management example under the folder “..\nRF5-SDK_copy\nRF5-SDK\examples\peripheral\pwr_mgmt\” on IAR. This example doesn’t work out of ... (more)

43
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## PCB antenna or Chip antenna?

Hi All,

This is my first time i am designing a PCB for nrf52840, I need a suggestion regarding the antenna to be used. I am going to have an application over BLE. Which antenna should i use in my ... (more)

28
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3
1

## S140 initialisation errors on nRF52840 if RTC2 interrupt enabled

I'm testing a custom application with the following configuration:

• Custom app based on the ble_app_pwr_profiling SDK example.
• Using SDK 13.1
• S140 SoftDevice s140_nrf52840_5.0.0-2.alpha_softdevice.hex
• PCA10056 development board, nRF52840

I've modified the example to configure ... (more)

38
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1

## RTT & RTT disable sdk 12/13 nRF52832/nRF52840

Dear all,

Help please, I'm evaluating ble_app_uart (Central/Peripheral) but I don't understand how to disable the echo I have on the RTT USB VCP

When I send data from the UART, I got (PCA10056/10040) the data ... (more)

42
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1
vote
1

## dnsmasq in border router error

I'm trying the example border router using 2 x nRF52840 boards one with CLI and the other with NCP connected to a PI. I can get ipv6 addresses and get them to ping each other but can't get ... (more)

52
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3
1

## Reverse current / Battery Protection

I want to use the nrf52840 with DCDC in high voltage mode to drive the circuite directly from a LI-ION battery.

Is there any reverse current protection built into the chip or are there any recommendations how to protect the ... (more)

78
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1

## Usb Tx succes event missed in Nordic's SDK stack

Hi, Nordic! I have used NRF52840 and SDK 13.0.0. From Errata:

3.18 [104] USBD: EPDATA event is not always generated

Workaround

Use the USB stack provided in Nordic's SDK.

We have used USB stack from latest ... (more)

22
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1
vote
1

## nRF52840 Preview DK mbed Bootloader

Hi everyone,

I went into the bootloader mode with the nRF52840 DK accidentally so I immediately turned off the DK and powered it back on. However, after powering the DK, the LED5 no longer lights up and the DK's ... (more)

86
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3
2

## What is the best IDE for development on NRF52840 board ?

I need to read analog output from the pin . Is there any additional hardware required for this?

75
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1

## nRF52840 coded phy sensitivity

Hi,

I get RSSI values like -96 or -97 dBm before the coded PHY connection between two nRF52840 pdks drops. Are these values something expected? TI advertises sensitivity of -103 dBm in their youtube video of CC2640R2F. Are they slightly ... (more)

608
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4

## nRF52840 PDK programming trouble

Hi, I have serious troubles when trying to program the board with softdevice (s140).

1. nRFGo Studio: nRFGo Studio installed and running fine. When I connected the board I received a notification to update jlink firmware. Update procedure ended with a ...
(more)

28
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## Program not pairing/bonding and pm_evt_handler never called

Using SDK13

I have a Central program and I included the peer manager code from ble_app_hrs_c but I am having issues after connecting to another dev kit with Peripheral code running on it. It seems that the pm_evt_handler function is ... (more)

50
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1
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1

## Factory demo code for nrf52840 preview dk?

Where can I find the source code or hex for the "factory installed" demo application in the nRF52840 Preview DK?

75
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2
1

## Antenna to use for NRF52840

I am building a prototype that will use the nrf52840, with limited space. Would making a small pcb antenna or using a chip antenna be better and what is the setup needed for the antenna. (capacitors and inductors)

70
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1
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2

## compiling nrf52-ble-image-transfer-demo

hi,

I have several questions regarding the demo.

1) I tried to load the provided nrf52840_xxaa.hex to PCA100056 with s140 5 alfa, however, no images is transferred

This is the output from device

UART Start!
SPIM - Spi master interface ...
(more)

71
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1
vote
1

## Thingy:52 node.js/Raspberry Pi demos PDK support

I would like to setup the just released RasPI demo using the Nordic-Thingy52-Nodejs repo I don't have a dongle, but 4 PDK 52840 boards and 2 Thingys.

Can I still use 1 PDK attached to the Pi instead of a dongle?

24
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1

## dtm for pca10056

There is no dtm for pca10056 in SDK 13.1.0 version. How can I do bluetooth RF test?

32
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1
vote
1

## nRF52840 Preview DK not appear as a removable drive.

Dear all,

I was following the "Getting started with the nRF52840 Preview Development Kit" page. But when i connect the board to the computer, the board do not appear as a removable drive, the LED1 is on, and using the ... (more)

48
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2

## Where can we buy the nRF52840 SoC?

Hello everyone,

I have tested my prototype on nRF52840 but the board is pretty big and I want to do a product pilot with a custom hardware of mine. Now I know that the 840 is not ready for commercial ... (more)

38
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2
1

Hi everyone,

I was wondering if anyone benchmarked the time for reading a word from flash on the nRF52840. I was able to find the write/erase time on the specs document but was not able to find anything about ... (more)

57
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Is there any simple way of reading analog values from pin. Setting up SAADC is giving too much of errors like command line action failed or any variable is undeclared whose header file is correctly included

40
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no

I followed this tutorial in Infocenter and installed everything http://infocenter.nordicsemi.com/inde..., but I have a problem with Thread examples, programming output looks normally:

and I also programmed board with a 802.15.4 example without any problems ... (more)

60
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1
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1

## Applications of USB and IEEE 802.15.4 MAC Library in Nrf52840?

Hi,

What are the different applications of using the USB and the IEEE 802.15.4 library? What different things can we build by using these libraries? Any examples would help.

30
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1

## nrf52840 crashes after connecting usb [closed]

I'm trying to implement usb function on the nrf52840. The moment that I connect the usb to the computer the chip resets.

With gdb debugger i found out where the fault happens. It happens if he jumps back in ... (more)

32
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no
1

## configuration menu in att_mtu_throughput example

I am looking at the att_mtu_throughput example in the blog (https://devzone.nordicsemi.com/blogs/...)

Some of the items in configuration menu that are shown in video and listed in the blog are not available in the firmware in github ... (more)

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• Total questions: 23725

## Recent blog posts

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Posted 2017-07-20 09:42:44 by Pär H

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