How to use a QR Code to send a long email message
This is an example to show you how you can use QR Codes to send quite long messages by directing the sender to a web page first.
If you click the link above it will open your email system on your phone and you should see that a longish message has already been written for you.
If you only need the scanner to send a very short message you can do it directly from a QR Code. The reason you can’t do that with really long emails is that the amount of information you need to store in the QR Code gets very large and makes the codes difficult to scan.