Quick Facts:

- QR Code
- the QR stands for Quick Response
- QR Codes come in different Version
- The Version determines how many characters can be encoded
- The type of characters set also influences how many characters can be encoded
- numbers
- numbers and letters
- numbers and letters and special characters
- etc.

- there are 40 QR code versions - we will only provide details up to version 5
- version numbers module/cell count increases in increments of 4 per side between version

- Modules/Cells
- QR codes are essentially squares arranged in a square grid on a contrasting background
- i.e. black squares in a square grid on a white background

- each of those squares is also referred to as a module or a cell

- QR codes are essentially squares arranged in a square grid on a contrasting background

- Error Correction/Error Correction Level
- error correction level means that 'backup' data is added to the QR code in case some of it gets covered up or damaged
- there are 4 different error correction levels
- L (7%)
- M (15%)
- Q (25%)
- H (30%)

- to find the error correction used on a QR code that does not scan check the highlighted areas

- Which QR Code Version to use is determined by the following

- What type of data do you want to encode
- How much data do you want to encode
- How much of the QR code will be covered by your logo (if any)
- how big the risk of accidental damage to the QR Code is

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