LMIC Frequencies

End Devices (Nodes) LMIC
1

If you print out the stored frequencies, just after an OTAA join, they look like this;

Channel0: 868100001
Channel1: 868300001
Channel2: 868500001
Channel3: 867100000
Channel4: 867300000
Channel5: 867500000
Channel6: 867700000
Channel7: 867900000

Now if you recover the session from FRAM later, using;

LMIC_setSession (netid, devaddr, nwkKey, artKey);

The frequencies look like this;

Channel0: 868100001
Channel1: 868300001
Channel2: 868500001
Channel3: 867100001
Channel4: 867300001
Channel5: 867500001
Channel6: 867700001
Channel7: 867900001

So what does the 1 at the end of the frequency mean, it must be a marker of some kind, since the frequency setting resolution of the SX127X is 61hz.

2

That is odd - I’ll add some debug around the channels to my trace work in progress library.

3

I thought it odd too.

The node is working OK on recovery of the OTAA session from FRAM, but then its gets the circa 1 in 10 downlinks issue that has been discussed on here previously, which seemed to start ocurring when V3 came into being.