If using the Dexcom G4, you need to solder one of these to use it with xdrip https://xdripkit.co.uk/ https://xdripkit.co.uk/ G5 works directly with the softwa

If using the Dexcom G4, you need to solder one of these to use it with xdrip https://xdripkit.co.uk/ https://xdripkit.co.uk/ G5 works directly with the software because the transmitter speaks Bluetooth.