This is a bit of an odd/specific question, but I'm having no luck, so maybe someone can help. I'm trying to build a microprinter using an Arduino and an Epson TM-T88II receipt/POS printer. The printer uses the ESC/POS system, but I can't get it to do anything at all from the Arduino. I'm doing things like:
#include <SoftwareSerial.h>
#define out_pin 3
#define in_pin 2
SoftwareSerial printer = SoftwareSerial(in_pin, out_pin);
void setup()
{
pinMode(in_pin, INPUT);
pinMode(out_pin, OUTPUT);
printer.begin(9600);
delay(1000);
printer.print(0x1B, BYTE);
printer.print('@'); // ESC(HEX 1B) @ is supposed to initialize the printer
printer.print("hello world");
printer.print(0xA, BYTE); // print buffer and line feed
}
I just can't get the printer to respond at all. The printer powers up and prints its self test just fine. It's a serial (RS232) printer, and I'm connecting it to the Arduino through a MAX233 chip. I've checked and rechecked my connections through the chip, which I think are right based on a friend who has a similar setup working. I read somewhere that the TM-T88 printers need null-modem serial cables, so I bought an adapter, and that didn't seem to make any difference.
I'm a newbie at electronics, so I'm completely stumped. I just want to get it to print something, so I can get to the fun part - the programming :). Any thoughts on things to test/try? I can give more detail on wiring or anything else, just didn't want this to get TOO long.