Dan had mentioned last night that the barometers might still be in 7E1 mode and thus not correctly talking to the DSMs. This was correct for s10. I have just logged in, turned off data acquisition so that I could use minicom to change the serial port configuration, and then was able to issue the .8N1 and .RESET commands. I then started data with a .BP. I did restart data acquisition (dup).
Since s4 wasn't connecting, I haven't been able to issue the same commands yet to it.