Setting bw to 500.0 and sf to 11

[frogg1ven]

Hi,
I'm working with lora E220, and trying to transmitt data, but after radio.begin() I'm getting state error code -20.
My begin function has params like this:
radio.begin(869.5, 500.0, 11, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0);
With bw=125.0 and sf=9, everything works perfectly, and I read that with bandwidth equals to 500.0 kHz, I should be able to set spreading factor to 11.

I was also trying to use radio.setSpreadingFactor(11); after radio.begin(869.5, 500.0, 9, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0);, and there is no state error, but it doesn't seems to change sf to 11.
Am I doing something wrong?
Regards.

[jgromes]

Briefly going throuhg the code, I don't see anything immediately obvious. Could you try to run the code in debug verbose mode as described on the wiki?

[frogg1ven]

I ran the program in debug verbose mode and this is output after radio.begin(869.5, 500.0, 9, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0); which is working:

CMD     80
DATW    0       A2

CMD     80
DATW    0       A2

CMD     8F
DATW    0       A2      0       A2

CMD     8A
DATW    1       A2

CMD     93
DATW    20      A2

CMD     88
DATW    3       A2      16      A2      A       A2      0       A2      0       A2      0       A2      0       A2

CMD     2
DATW    3       A2      FF      A2

CMD     8
DATW    0       A2      0       A2      0       A2      0       A2      0       A2      0       A2      0       A2      0       A2

CMD     89
DATW    7F      A2

CMD     11
DATR    0       A2      0       1

CMD     8B
DATW    9       A2      4       A2      3       A2      0       A2

CMD     11
DATR    0       A2      0       1

CMD     8B
DATW    9       A2      6       A2      3       A2      0       A2

CMD     11
DATR    0       A2      0       1

CMD     8B
DATW    9       A2      6       A2      4       A2      0       A2

CMD     11
DATR    0       A2      0       1

CMD     D       7       40
DATW    14      A2      24      A2

CMD     11
DATR    0       A2      0       1

CMD     1D      7       36
DATR    0       A2      0       D

CMD     D       7       36
DATW    9       A2

CMD     8C
DATW    0       A2      8       A2      0       A2      FF      A2      1       A2      0       A2

CMD     D       8       E7
DATW    18      A2

CMD     9D
DATW    1       A2

CMD     96
DATW    1       A2

CMD     98
DATW    D7      A2      DB      A2

CMD     86
DATW    36      A2      58      A2      0       A2      0       A2

CMD     1D      8       E7
DATR    0       A2      0       18

CMD     95
DATW    4       A2      7       A2      0       A2      1       A2

CMD     8E
DATW    1       A2      4       A2

CMD     D       8       E7
DATW    18      A2

CMD     1D      8       D8
DATR    0       A2      0       FE

CMD     D       8       D8
DATW    FE      A2

State: 0
CMD     80
DATW    0       A2

CMD     84
DATW    0       A2

and output after radio.begin(869.5, 500.0, 11, 8, SX126X_SYNC_WORD_PRIVATE, 1, 8, 0); which is not working:

CMD     80        
DATW    0       A2

CMD     80        
DATW    0       A2

CMD     8F
DATW    0       A2      0       A2

CMD     8A        
DATW    1       A2

CMD     93
DATW    20      A2

CMD     88        
DATW    3       A2      18      A2      A       A2      0       A2      0       A2      0       A2      0       A2

CMD     2
DATW    3       A2      FF      A2

CMD     8
DATW    0       A2      0       A2      0       A2      0       A2      0       A2      0       A2      0       A2      0       A2

CMD     89
DATW    7F      A2

CMD     11        
DATR    0       A2      0       1

CMD     8B
DATW    B       A2      4       A2      3       A2      0       A2

CMD     11
DATR    0       A8      0       FF

State: -20
CMD     80
DATW    0       A8

CMD     84
DATW    0       A2

[frogg1ven]

I compared the outputs and here are the differences: