nRF54l15 sense - the firmware

[Cursor_AI]

I have 2 nrf54l15 sense boards!

I’m using the same firmware!

The distance to the phone is identical!

Result: 1 board works fine, but 2 doesn’t!

1 board logs:

*** Delaying boot by 500ms… ***

*** Booting nRF Connect SDK v3.2.4-4c3fc0d44534 ***

*** Using Zephyr OS v4.2.99-9673eec75908 ***

[nRF54] main start

[BOOT] bt_enable start

[BLE] stack ready cb

[BOOT] bt_enable ok

[nRF54] BLE stack ready

[MIC] boot gain sw=512 (x2.00)

[BLE] adv on (boot)

[BLE] MTU 247 pay=244

[BOOT] SD stage

[MIC] PDM 16000 Hz block=320 slab=32 sw=512 (x2.00) hw=0x40

[AIR] conn int=6 ok

[AIR] conn int=6 ok

[MIC] gain sw=639 (x2.49) hw=0x40

[MIC] hw_gain=0x78

[AIR] conn int=12 deg

[SD] boot attach

[MIC] gain sw=639 (x2.49) hw=0x78

[MIC] hw_gain=0x78

[AIR] tx=notify_cb qhi=4

[AIR] stream ON

[AIR] stream int=12

[AIR] cfg pcm cap=16000 air=16000 Hz pay=244

[SD] probe fail

[SD] boot: no card

[AIR] int=12 to=500 phy=2 dlen=251 pay=244 q=0/24 slots=12 kbps=0 need=256 drop+0 deq+0 nf+0 enomem=0

[AIR] conn int=9 deg

[BOOT] mic stage

[BOOT] ready

[AIR] int=9 to=400 phy=2 dlen=251 pay=244 q=0/24 slots=12 kbps=183 need=256 drop+0 deq+72 nf+0 enomem=0

[AIR] int=9 to=400 phy=2 dlen=251 pay=244 q=0/24 slots=12 kbps=254 need=256 drop+0 deq+100 nf+0 enomem=0

[AIR] int=9 to=400 phy=2 dlen=251 pay=244 q=0/24 slots=12 kbps=257 need=256 drop+0 deq+101 nf+0 enomem=0

[MIC] gain sw=639 (x2.49) hw=0x78

[MIC] hw_gain=0x78

[AIR] stream OFF drops=0

[MIC] gain sw=639 (x2.49) hw=0x78

[MIC] hw_gain=0x78

[SD] probe fail

[SD] boot attach

2 board logs:

*** Delaying boot by 500ms… ***

*** Booting nRF Connect SDK v3.2.4-4c3fc0d44534 ***

*** Using Zephyr OS v4.2.99-9673eec75908 ***

[nRF54] main start

[BOOT] bt_enable start

[BLE] stack ready cb

[BOOT] bt_enable ok

[nRF54] BLE stack ready

[MIC] boot gain sw=512 (x2.00)

[BLE] adv on (boot)

[BOOT] SD stage

[SD] boot attach

[BLE] MTU 247 pay=244

[MIC] PDM 16000 Hz block=320 slab=32 sw=512 (x2.00) hw=0x40

[AIR] conn int=6 ok

[AIR] conn int=6 ok

[MIC] gain sw=639 (x2.49) hw=0x40

[MIC] hw_gain=0x78

[AIR] conn int=12 deg

[MIC] gain sw=639 (x2.49) hw=0x78

[MIC] hw_gain=0x78

[AIR] tx=notify_cb qhi=4

[AIR] stream ON

[AIR] stream int=12

[AIR] cfg pcm cap=16000 air=16000 Hz pay=244

[SD] probe fail

[SD] boot: no card

[BOOT] mic stage

[BOOT] ready

[AIR] int=12 to=500 phy=2 dlen=251 pay=244 q=4/24 slots=0 kbps=26 need=256 drop+0 deq+13 nf+0 enomem=0

[AIR] int=12 to=500 phy=2 dlen=251 pay=244 q=4/24 slots=0 kbps=0 need=256 drop+0 deq+1 nf+0 enomem=0

[AIR] int=12 to=500 phy=2 dlen=251 pay=244 q=4/24 slots=0 kbps=0 need=256 drop+0 deq+0 nf+0 enomem=0

[MIC] gain sw=639 (x2.49) hw=0x78

[MIC] hw_gain=0x78

[AIR] stream OFF drops=0

[MIC] blocks=500 peak=7 raw=688 miss=0

[SD] probe fail

1 boards good

2 FAIL

Don’t pay attention to the SD Card. I just disconnected the nrf54l15 sense from the breadboard.

I tried cleaning it again, but nothing changed. Is it a defect?

[PJ_Glasso]

Hi there,

Sounds like a power supply or battery issue, How are they powered?, You take any readings
You have a picture ?

HTH
GL PJ

[Cursor_AI]

The same USB!

And I don’t understand what the problem is…

[PJ_Glasso]

Hi there,

So, can I ask who solderd this? You or Seeed ?

Can you reflow the pins and clean up a little, less solder more flux BTW

Try again.

HTH
GL PJ

[Cursor_AI]

Seeed!
I only flashed it! I haven’t soldered it yet! I returned the board.

[PJ_Glasso]

Hi there,

Ok, then , WOW …
Something was up … that was probably the worst looking Xiao I have ever seen.
if you still had the package , maybe they could check the batch, that day someone was lacking no doubt. (Chinese new year and all)

Glad you returned it.
They are IMO the best MCU 's on the planet

GL PJ

[Cursor_AI]

I’m guessing it’s the fault of the sellers who soldered the legs to the board, not the SEEEDs themselves. =)

[PJ_Glasso]

Hi there,

ah’ I didn’t know that was a thing…Yikes

GL PJ