I have an issue with the mini thermal printer. I can successfully push things to the printer to print, but they come out faded in spots and in garbled characters. When I power on the printer while holding the feed button it just prints CP437 repeatedly on new lines. It doesn't print anything else, just CP437 until I let go of the button. Is there a firmware update I'm missing or is it a faulty printer? Maybe some other issue?
Okay. Let's start by removing the Arduino from the equation. Disconnect it from the printer, then hold the feed button while connecting power to the printer. Does it still print the CP437 message in a loop, or does it print the character map?
I unpluged the printer from everything, then i press the feed button, then i pluged to my 5V-2A adapter and it started printing CP437 on an on, then i released the feed button and it stoped printing and that was it, every time i try this is the same result.