How many alphanumeric charecters can be embedded in a QR Code?

Question

As per the Wiki below

QRC Storage Data

the maximum number of alphanumeric charecters that can be stored is 4,296. But while trying it out, I'm unable to proceed for more than approx 2220 charecters at an error correction level of L.

Is alphanumeric charecters not the same numeric charecters. Do "123", "XYZ" and "AB%" not all contain "Three" charecters?

Answer 1

The max is 4296 if you are in alphanumeric mode. To do that you can only use the characters listed on the link you sent. Your examples are certainly all 3 characters, and fit the alphanumeric character set.

It is probably a problem with the encoder, or some other intermediate limitation, like the length of a URL you are sending to the encoder.