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Author Topic: thermal printer + Arduino  (Read 1369 times)
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I recently salvaged a thermal printer saying "EM205_101122" on it's circuit board. I also got success in accessing to all it's datasheets.
It seems that it has a RS232 as well as TTL ports, but both of the ports are given two  extra pins saying "RTS/DTS and DTR/DSR".
While I read about them, they are the flow control pins and are to be kept +12V or -12V.
For communication with the Arduino (as given  in this tutorial: http://bildr.org/2011/08/thermal-printer-arduino/) does these pins are required to be used or we can just use the RX TX pins only?

Help me as I'm stuck in middle of it and I just want to be sure as I don't want to burn anything trying to make it.

Ps find the datasheets as attached below

* EP108PP(Full).pdf (617.38 KB - downloaded 55 times.)
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I recently salvaged a thermal printer saying "EM205_101122" on it's circuit board. I also got success in accessing to all it's datasheets.
It seems that it has a RS232 as well as TTL ports, but both of the ports are given two  extra pins saying "RTS/DTS and DTR/DSR".
These are what are called 'handshaking' pins.
Quote
While I read about them, they are the flow control pins and are to be kept +12V or -12V.
Only on the RS232 input. The TTL inputs work on 0 - 5V only.
Quote
For communication with the Arduino (as given  in this tutorial: http://bildr.org/2011/08/thermal-printer-arduino/) does these pins are required to be used or we can just use the RX TX pins only?
Google 'handshaking'.
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