šŸ¤“ Xiao nRF54L15 what's inside and where to start

Products & Technology XIAO
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Hi there,

So asked many time where to find and what I use for info from the NORDs :grin:

START here to see what you can expect ā€œeventuallyā€ but the info is Now showing up and even a new Piece has surfaced.

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Couple of hours will get you up to speed and in the know, So now you know :grin: :+1:

HTH
GL :slight_smile: PJ :v:

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I want to chime in to mention this great course Nordic has just for the nRF54L15
https://academy.nordicsemi.com/courses/nrf54l-series-express-course/

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Hi there,

You get one of these to hang in the Bathroom, Too :framed_picture:

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:grin: :+1:

GL :slight_smile: PJ :v:

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Show off, Now I have to actually finish the course :blush:

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LOL, sweetā€¦ and the Army is building.
:grin: :+1:

funny stuff for sure.

And boy for the beginners out thereā€¦ They are able to jump in and get some bearings and a START, very motivating.
Smart company IMO. :crossed_fingers:

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I even got das Blinken lights, celebrate with me!

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I finally figured out how to run the LED strip sample on the Xiao nrf54L15! It requires creating custom bindings,a very specific overlay, and only works on SPI MOSI pin d10ā€¦

I posted the modified zephyr sample here if anyone else is curious.
nrf54L15-binding.h
And the led strip definition in the .overlay and defconfig are the key parts I changed.

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Next UPā€¦ !

Connect SDK and Zephyr RTOS

Hi there,

Itā€™s a Great Overview of the Nordic POVā€¦ it has a little bit of everything in it, another reason they OWN the BLE space. :+1:

Check out all the FREE dev academy courses to get you SDK freak on and learn some of the new Tech coming to the scene, WIFI Locationing, channel sounding, Enhanced BLE version 6.0 standards and more!

GL :slight_smile: PJ :v:

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Cool. I already dove into working with zephyr and the SDKs head first! Also, hereā€™s a peak at my 54l project progress.

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Hi there,

So , If you never Knew what kind of magic, these Seeedineers are working with, more of the "

Whatā€™s inside (naked) :dizzy_face:

Naked_54L15_Xiao
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Break out the weller gun for this one ā€¦LOL :grin:

GL :slight_smile: PJ :v:

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Hi, PJ!

Itā€™s been a while since youā€™ve mentioned that ā€œItā€™s quite early to develop on nrf54L, stick to the nrf52840 for nowā€œ. What do you think about now?

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Hi there,

And Seasonā€™s Greetings. :christmas_tree:

SO, Iā€™m feeling a certain way on this coming into the Christmas. :grin:
Encouraged that Seeed took a shot. Iā€™m a STRONG if you have a mature app on the Nrf52 series and itā€™s not broke, then Donā€™t make any sudden moves investigate what the Seriously faster speed and more ram can do for YOU :index_pointing_at_the_viewer:
If your in a ML situation it is a nice bump up :+1:
If it is a BLE heavy then you got some ā€œsplainingā€ to do.:face_with_hand_over_mouth:

Antenna Gate

, means itā€™s going to really be useful only in a non-Battery dependant app. IMHO :bow: The resistor values for the voltage divider (battery level reading) component selection and some other design choices are not optimum for the deepest sleep power consumption.

That being said :

Itā€™s not all bad. The Better receiver in this silicon radio section appears to me, I get better connections on the Sensor Node projects distributed Nodes with nRF54 Series than m|y nRF52ā€™s, Higher RSSIā€™s, faster and longer distance indoors (metal roof warehouse)
Also the jury is still out in some ways for the Lowest power numbers.
I have been using the onboard Antenna and one EXT, I just received (back-ordered) more of the external ones. So Iā€™ll check it with some demo video action time permitting :crossed_fingers:
I like that the software is coming around and getting a lot of attention like only Nordic does. Seeedineerā€™s are making headway every week on it and Wiki updates are more Frequentā€¦ meanwhile the innovations keep coming :magic_wand:

:man_detective: :backhand_index_pointing_left: this guy says maybe an LM20 in the back :shushing_face: and some other game changing industry disruptor tech coming 1st-QTR/2ndQtr 2026
:shaking_face:

Look around 2-17-2026..
GL :santa: PJ :v:

Year of the Fire Horse should kick some :donkey: :+1:

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Hey, PJ!

Seasonā€™s greetings, indeed! Thanks for your answer.
My app is quite straightforward on requirements and they are:

  1. Heavy BLE usage at short range (I should be very much ok with 2-3 meters, not more)
  2. Thereā€™s an application on Computer and nrf SOC should actively communicate with it, which means it is either in no sleep, or really short sleep cycles, so the application is always able to send some data to SOC and the latter should stay responsive. Of course, I can implement something like a long sleep if the app doesnā€™t send any data for 2-3 minutes and then demand a ā€œmanualā€œ wake-up form the board. But what I mean here is that I encourage the system to stay in active BLE mode.
  3. Battery powered. The battery should withstand 5-8 hours

With the referenced 6mA in active antenna mode for nrf52840 I should be fine already. But I was thinking if moving towards 4mA in nrf54 is a wise move, as overall this is 30% longer battery life. The processing power of nrf52 is more than enough, I donā€™t do heavy math, and the storage of nrf52 should be also fine, though I havenā€™t tested DFU yet to see, whether it is enough.

So, in short, the only parameter I look at comparing both SOCs is the active antenna mode, specifically for my point 2.

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Hi gmrck,

The link below might be helpful.

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