The serial number of my transmitter isn't recognised

If you can't connect your Aidex transmitter as it says serial number not recognised do check this

Your serial number for your GlucoRx Aidex transmitter is both underneath the transmitter as well as on the transmitter box. Do check that you've entered the letters and numbers correctly, ensuing you haven't mixed up the number '1' for the letter 'I" for instance.