you need to convert cable communicating from computer to be a serial port and then connecting the microcontroller's rx pin with it then transmit the data using tx to the bluetooth device and then receiving the data using another bluetooth device connected to rx pin with another microcontroller connected to pos printer using tx pin . maybe you'll use max 232 to convert cables
Hi, I already have a working prototype for converting unicodes to BMP format in C Linux platform. If you want I can give you the sample...It is already tested and working for all the south indian languages. May I know which BT printer are you using. I have working experience in using our own BT printer. I am telugu speaking guy