Outputting the ° symbol from an Arduino Mega 2560 to a 4DSystems uLCD-70DT

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1

Hey Everybody,

I am trying to output some GPS coordinates to a 4DSystems uLCD-70DT. In doing so, I am trying to output the “°” symbol (degree symbol) and it shows up on the screen in a very peculiar manner.

I am not sure whether or not this is an Arduino issue or a 4DSystems issue. That being said, I wrote my own code to output to the String object in Visi Genie. I essentially write CMD, ID, STRINGLENGTH, STRING, CHECKSUM to the uLCD-70DT via the Serial1 serial port. My code seems to work fine with the exception of the “A” with a “^” above it. See the attached photo.

Any suggestions?

TIA,

–Neal

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2

Hi Neal.

The degree symbol is in the extended ASCII character set and I’m not sure how 4D is mapping extended characters. I looked but wasn’t able to find a character set for this display, but 4D may have that hiding somewhere if you ask.

The only other thing I can think of would be to write a script that prints all the possible characters and you might come across the one code that’s just a degree symbol and nothing else.