Looks like that got it. I assume rain total is also supposed to be in mm? The data I’m seeing makes sense if that;s the case:
MII Data OK
Current data 15:08:35: Temperature= 70.2 Windspeed =4.8 Gustspeed =1.0 Direction =143 Humidity=100 Barometer=29.9 Daily Rain=1.0 Rain Rate 0.1mm/min
ser_read error Resource temporarily unavailable
ser_read error Resource temporarily unavailable