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Top 5 Positive Customer Reviews for printer rs232
For arduino,chose TTL. You can find detailed manual in English that contains esc commands or character codes. Among commands double strike does not seem to work but everything else works fine. I chose RS232 type as I was not sure of the difference and it did not work with arduino. I used transistor to enhance TX high to 12V and it went well. Converting Low to negative 12 was not necessary. And 12v instead of 15v working ok in front of me.