OK, tag got this working for us. I was able to send (all in decimal)
16,2,80,17,10,0,125,16,3
and got back
16,2,0,18,64,0,100, 16,3
So the 64 mean 3200ppm salt? That is right about what it should be. Actually, it is about 3400 typically.
Also, I sent
16,2,80,0,0,98,16,3
and got...