How to know Saka has response the command?

#6666#SLEEP#5# = Activate IPM

#6666#SLEEP#0# = Deactivate IPM

#6666#SST#60# = Activate Idling

#6666#SST#0# = Deactivate Idling

This is the Last Command that can be viewed on the sensor panel which indicates the command on Saka has been successfully sent.