Lmst

Aktueller Tiefstpreis für #nRF52840 Evalboard bei Aliexpress: 1.89EUR

cc @octoate ...wo wir gerade das Thema hatten ;-)

Screenshot: Aliexpress Artikel nRF52840 für 1.89EUR

@octoate Zigbee hatte ich lediglich Mal mit den ESP32 s ausprobiert, würde ich aber nicht für Batteriebetrieb empfehlen. Wenn von Nordic, dann entweder 'alten' #nRF52840, damit Du altes nRF Connect SDK nutzen kannst oder neuen #nRF54L15 dann mit #Zephyr. Zigbee samples https://share.google/aHb4LxuU7vJ4xJwX3
Beide gibt's von Seeedstudio in der Xiao-Serie

Muzi Unveils Launches Modular BASE Board System for Meshtastic Mesh Networking

https://fed.brid.gy/r/https://linuxgizmos.com/muzi-unveils-launches-modular-base-board-system-for-meshtastic-mesh-networking/

Update #Reichweichentest #Meshtastic

neues Gerät: #LilyGo T-Echo Plus

--> https://cool-web.de/nrf/lora-meshtastic-reichweitentest-lilygo-elecrow-seeed-2025-09-18.htm

#TEcho #TEchoPlus #nRF #Nordic #nRF52840 #Elektronik #Maker #DIY #Mikrocontroller #868MHz #Jedermannfunk #Node

I am slowly getting better at soldering, 4 out of 7 successful #MechanicalKeyboard PCBs now - all three of my diode-free #GraphTheory wired keyboard PCB designs have worked (eventually) ⌨️🎊

1️⃣ #RaspberryPiPico #RP2040 ‘Gamma Omega TC36K’ (USB only) http://astrobeano.blogspot.com/2025/08/my-first-self-built-computer-keyboard.html

2️⃣ #ProMicro #nRF52840 BLE ‘Gamma Omega Hesse’ https://astrobeano.blogspot.com/2025/10/hesse-diode-free-bluetooth-keyboard.html

3️⃣ #SeeedStudio #Xiao #SplitKeyboard BLE split Forager ‘Acid’ http://astrobeano.blogspot.com/2025/10/partial-heawood-forager-keyboard.html

#ErgoMechKeyboard #ErgonomicKeyboard

Underside of the left hand’s half of the ‘Forager Acid’ split keyboard, with a transparent bottom case letting you see the blue PCB, LiPo battery (bottom middle), hot swap switch sockets, and Seeed Xiao controller (top right).

So I spent some time optimizing the #MeshCore firmware to use less power on some companion devices.

Especially if you are using devices based on #nrf52840 like #T1000E or #WisMeshTag and want to avoid draining the battery when the device is powered off, you might want to look at https://github.com/meshcore-dev/MeshCore/pull/1122.

Tests and feedback welcome!

#lora #embedded #electronics #meshnetwork #microcontroller

My current success rate with #MechanicalKeyboard PCB soldering is currently only 2 out of 5, well 40% is a pass mark - just.

The #RaspberryPiPico #RP2040 ‘Gamma Omega TC36K’ board worked (an easy build, could probably have socketed it). 💚

One success, one failure with #SeeedStudio #Xiao BLE castellated in Forager ‘Acid’ PCB (some fiddly back pads). 🧡

Two failures with #ProMicro #nRF52840 BLE in ‘Gamma Omega Hesse’ board attempting faux-castellation💔

Just as well custom PCBs are fabricated in batches of five - waiting on spare parts to try again - #LearningByDoing or #LearningByFailing ?

Review #RAK #wireless #WisMesh #Tag #LoRa #Meshtastic #Tracker und Vergleich mit #Seeed #Tracker #T1000e

--> https://cool-web.de/nrf/rak-wireless-wismesh-tag-tracker-lora-meshtastic-review.htm

#Review #RAKwireless #Tag #SeeedStudio #nRF #Nordic #nRF52840 #Elektronik #Maker #DIY #Mikrocontroller #868MHz #Jedermannfunk #Node #EDC

#Mailbag-Video #145 #Review #RakWireless #WisMesh #Tag, #Review und Vergleich mit #Seeed #SenseCAP #T1000E:

--> https://youtu.be/KHqVEwpL1l4

#RAK #SeeedStudio #Tracker #LoRa #Meshtastic #Nordic #nRF52840 #Elektronik #Maker #DIY #MadeInChina #China #868MHz #Jedermannfunk #Node #EDC

nRF 52840 Bluetooth Module: The Swiss Army Knife of 2.4 GHz Radios

#nrf52840 #nrf52840Bluetoothmodule
https://www.tecksay.com/BluetoothModule&BluetoothBeacon/nrf-52840-bluetooth-module-the-swiss-army-knife-of-2-4-ghz-radios/

LILYGO T-Echo Plus Integrates LoRa, GNSS, and IMU in Rugged Wireless Smart Tag

https://fed.brid.gy/r/https://linuxgizmos.com/lilygo-t-echo-plus-integrates-lora-gnss-and-imu-in-rugged-wireless-smart-tag/

If my first wireless Bluetooth #MechanicalKeyboard proves a little battery hungry - and the #ZMK Discord channel suggests the #nRF52840 #ProMicro controller I plan on using can be - there’s an easy fix: Buy a bigger battery! 🪫

In hindsight I was over cautious when I ordered the 300mAh LP602030 battery BEFORE finalising the design, and eked out a few more millimetres for it 😢

Design is here: https://github.com/unspecworks/gamma-omega/tree/main/hesse

Photo of underside of Gamma Omega Hesse keyboard PCB (in purple) in the top case (black) with a small looking LP602030 LiPo battery in the cutout with plenty of room to spare.

Photo of topside of Gamma Omega Hesse keyboard PCB (in purple) on the bottom case plate (white) with a small looking LP602030 LiPo battery in the cutout with plenty of room to spare connected to a JST connector which would be soldered in place later (and which impedes the battery compartment less than I feared). This is angled to match the case and nearest keys.

The last few days I spent a fair chunk of my day arguing with the nRF Connect SDK and its Partition Manager…

The goal: trying to get NSIB and mcuboot to behave with the secondary image on external (QSPI) flash.

Took the better part of yesterday and today just getting a `pm_static.yml` together… only for it to compile an image, and `west flash` to barf because the image file embedded both on-chip flash data *and* a copy of the bootloader for the QSPI flash.

In the end, I came to the following conclusions:

1. Partition manager is over-engineered and fails at its prime objective of making partition layout easier (they tell you to skip dynamic layout and use `pm_static.yml` when doing DFU… enough said!)
2. NSIB is a no-go if external flash is involved because it *insists* on making a composite image that won't actually load.

Tomorrow, I'll see if I can bend `mcuboot` to my will. Primarily I want to see if I can move the public keys it uses for authenticity checks into a separate partition so I can update those without flashing a whole new bootloader.

#mcuboot #nrfconnect #nsib #nrf52840 #zephyr #openthread

#Stromverbrauch und #DeepSleep des #nRF52840 #ProMicro/#SuperMini Board (nice!nano kompatibel) vs. ESP32 und andere

--> https://cool-web.de/nrf/nrf52840-stromverbrauch-deepsleep-promicro-supermini-nicenano-board-platformio.htm

https://www.youtube.com/watch?v=CHgmXYLKigI

https://www.youtube.com/watch?v=xd1tplxSs20

#nRF #Nordic #Schaltung #Elektronik #Maker #DIY #Mikrocontroller #Anleitung #Tutorial #DevBoard #PlatformIO #Arduino #Programmierung #AliExpress #Stromverbrauch #Messung #Vergleich #ESP32 #Arduino #Raspberry #Pi #Pico

Vorstellung des RF52840 ProMicro Board (nice!nano kompatibel)

--> https://cool-web.de/nrf/nrf52840-promicro-nicenano-board-platformio-vorstellung.htm

#nRF #Nordic #nRF52840 #Schaltung #Elektronik #Maker #DIY #Mikrocontroller #Anleitung #Tutorial #ProMicro #NiceNano #DevBoard #PlatformIO #Arduino #Programmierung #AliExpress

LoRa-Meshtastic Geräte: Die große Vergleichstabelle

--> https://cool-web.de/nrf/lora-meshtastic-geraete-grosse-vergleichstest-tabelle-vergleich-bewertung-erfahrung-review-rezension.htm

#Review #Tabelle #Vergleich #Seeed #LilyGo #Elecrow #nRF #LoRa #Meshtastic #Nordic #nRF52840 #ESP32 #ESP32S3 #Elektronik #Maker #DIY #Mikrocontroller #Funknetzwerk #868MHz #Jedermannfunk #Node

R1 Neo Meshtastic Device Introduced with GPS and nRF52840 Processor

https://fed.brid.gy/r/https://linuxgizmos.com/r1-neo-meshtastic-device-introduced-with-gps-and-nrf52840-processor/

Soldando Faketec v3 para nodo Meshtastic

En esta ocasión muestro como realizo mi versión de las faketec y voy explicando como realizo cada paso intentando simplificar el proceso para soldar lo más cómodo posible.

https://youtu.be/_tDCYb8ES7U

#meshtastic #iot #maker #nrf52840 #faketec