Radio Channel 17 connect with Channel 25.

RE: Radio Channel 17 connect with Channel 25.

Marte Myrvold — Tue, 16 Apr 2024 13:54:03 GMT

Hi,

Yes, this seems to be a hardware issue. I will discuss this with one of our hardware experts and get back to you.

Best regards,
Marte

keunsik — Tue, 16 Apr 2024 06:59:43 GMT

I checked All Channel.

and, I found out all channel is same.

Ch_A+8 = CH_B

Almost 40Mhz Difference is.

For example, Ch11 and Ch19 communicate with each.

Ch12 and Ch20 communicate with each.

....

At first, Device start Leader role.

But, it soon changed child if seding data was detected.

As i said, I can see only my board. not nRF52840DK Board.

is it hardware issue?

keunsik — Tue, 16 Apr 2024 00:57:34 GMT

Dear

I had checked on nRF52840DK Board.

On SDK Board was nothing symptom.

and, my Board was issued when connected device is over 2 devices.

It might be a problem about RF matching.

Anyway, i will disable ch25.

keunsik — Mon, 15 Apr 2024 13:28:59 GMT

Dear,

As i said,

In case my designed Board, If TX_POWER is under 4 dbm, Sympom is rare. Ratio reach tiny.

I can not check on nRF52840dk in detail because i have many works.

I will check tomorrow again. and i will leave note.

Marte Myrvold — Mon, 15 Apr 2024 13:09:14 GMT

Hi,

To verify, are you only seeing this issue with the device using the incorrect channel on a custom board and not with the nRF52840 DK?

Best regards,
Marte

keunsik — Fri, 12 Apr 2024 06:38:09 GMT

More information:

TX_Power is different: SDK is 0 dbm and My MP is 8dbm.

As i checked, when My MP is 0dbm , symptom was nothing.

7,6,5dbm was issued.