Only close connection if it's open when re-checking connections
Only close connection if it's open when re-checking connections

hmflash/Cura,ynotstartups/Wanhao,Curahelper/Cura,fieldOfView/Cura,fieldOfView/Cura,Curahelper/Cura,ynotstartups/Wanhao,hmflash/Cura