@AWI
This is what I get with debug turned on:
Temperature=25.10, LastTemp=25.10
Flow rate: 0.0L/min Output Liquid Quantity: 0.00L
Temperature=25.00, LastTemp=25.10
TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:25.0
Flow rate: 0.0L/min Output Liquid Quantity: 0.00L
TSF:MSG:READ,0-0-1,s=2,c=1,t=2,pt=0,l=1,sg=0:0
TSF:MSG:ACK REQ
TSF:MSG:SEND,1-1-0-0,s=2,c=1,t=2,pt=0,l=1,sg=0,ft=0,st=OK:0
Incoming change for sensor:2, New status: 0
Temperature=25.10, LastTemp=25.00
!TSF:MSG:SEND,1-1-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=NACK:25.1
Flow rate: 0.0L/min Output Liquid Quantity: 0.00L
Temperature=25.10, LastTemp=25.10
Flow rate: 0.0L/min Output Liquid Quantity: 0.00L