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nRF9151 LTE-M (SDK 2.9.0) – High MQTT publish latency (India roaming eSIM) causing severe battery drain 0

We are developing a battery-powered medical device using nRF9151 with nRF Connect SDK v2.9.0 , where data is transmitted to AWS IoT Core using MQTT over LTE Cat-M . While...
- development
- software
- lte-m
- nRF Connect SDK
- nRF9151
- low-power
7 views

0 replies

Started 32 minutes ago
by Milan Pipaliya
Not Answered
IEEE 802.15.4 MCPS interface for teaching purposes – alternatives in nRF Connect SDK? 0

Hello everybody, I am a research assistant at a university , responsible for maintaining and porting existing student lab exercises from the legacy nRF5 SDK to the nRF Connect...
16 views

0 replies

Started 2 hours ago
by hort
Not Answered
Why is the output from the multicell location REST API (Ground Fix) changing day to day despite sending the same cell information? Why is the ADV parameter not used when doing Cell Locationing (Ground Fix)? 0

The output from the REST API when doing multicell locationing changes from day to day even when the inputs are the same. Why is this the case and is it possible to keep the...
- software
- nRF9160
- lte-m
- nRF Cloud
- Evaluation
19 views

0 replies

Started 13 hours ago
by leo_nam
Not Answered
Discrepancy between SAADC Input Configuration (P0.04) and Physical Pin (P0.05) despite Full Chip Erase 0

I am encountering a strange hardware/software mapping issue with the SAADC on an nRF52833 DK running on Zephyr (NCS) . Using VS Code nRF Toolchain and SDK (V3.2) The issue...
29 views

0 replies

Started 16 hours ago
by caneralpsaygin
Not Answered
PPK2 shows 9–12 mA idle current on Mac/Linux laptops, but ~600–700µA on my team member's desktop for same custom nRF54L15 board 0

I’m facing a Power Profiler Kit II (PPK2) measurement discrepancy that appears to depend on the host PC , not the target board or firmware. Target setup Custom board...
- development
- Failure Analysis
- debugging
- Confusion
- nRF54L15
- nrf52840
- low-power
- usb
44 views

0 replies

Started 17 hours ago
by Anik Datta

Recent in the DevZone Blog

Beacon Kit - Mistake in Ref_Design_UG_v1.0

Salman

I connected the programming header as described in "nRF6930_Beacon_Ref_Design_UG_v1.0.pdf" 5.5.4 Programming interface. I was trying to program Beacon Kit but failed many times then I compared it with…
- 10 Oct 2014
SD card interfacing

Salman

Hi, I have written SD & SDHC card routine for reading, writing and erasing data from SD card. It used the hardware SPI of nRF51822. NOTE: 1)Define the PINs of SD card first before initialing. 2)Define…
- 10 Oct 2014
How different BLE packet types influence throughput

Stefan Birnir Sverrisson

There are several types of write operations, write request with authorization, write request without authorization and write command. You can see message sequence charts for those messages here and he…
- 9 Oct 2014
Measuring Lithium battery voltage with nRF51

Stefan Birnir Sverrisson

Here is an example of a hardware setup to measure the voltage on a Lithium battery with a voltage divider and a connected capacitor. The Lithium battery typically has a voltage range of 2.7 - 4.2 V and…
- 2 Oct 2014
Sniffer application for OS X

RK

I've put up on Sourceforge, a Mac OSX application which interfaces with the Nordic BTLE sniffer software and has some of the functionality of the Windows application Nordic ships with that software package…
- 1 Oct 2014
Getting started with nRF51 development on Mac OS X

Eirik Midttun

Update: Since this blog was originally written the nrfjprog tool has been ported to OS X (now macOS). This means that the flash programming is much simpler, and it is simply a matter of following the documentation…
- 1 Sep 2014