ASCII vs UnicodeĪSCII and Unicode are two different character encodings – standards on how to represent different characters manipulated in digital form. So if the character is interpreted incorrectly, the lookup will result in an incorrect or missing bitmap shown on the display. Parola can be used to display non-ASCII characters but the programmer needs to take steps to ensure this happens.įor any display, a character code is just a number that identifies a pattern of pixels that represent the ‘visual’ of the character to be displayed a bit pattern that is found in the font definitions. What causes the problem?Īt its basic level, the issue is that non-ASCII characters are being processed as ASCII characters. These characters, often typed in from the Serial monitor or embedded within strings, contain non-ASCII characters. A question that I am asked on a regular basis is why particular characters in messages are not displayed ‘as-expected’ by the Parola library.
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