You can scan it straight away however the old one will no longer work. It will just ask if you want to start a new sensor and you say yes. I put my new ones on 24 hours before to bed in.
I run both libre & shuggar apps simultaneously,
When I start a new sensor shuggar reads the old one for the hours start up time enabling to still get readings to my watch & phone every 5 minutes
I run both libre & shuggar apps simultaneously,
When I start a new sensor shuggar reads the old one for the hours start up time enabling to still get readings to my watch & phone every 5 minutes
To clarify @DEBBIESCOTT , Libre sensors if pushed beyond factory life. Can sometimes loop the last 6 or 8 hours after recommended usage... (on a 3rd party app.)