1. I am using Atmega2560 & em205 thermal printer. https://hacktronics.co.in/thermal-p...-thermal-printer-with-rs232-and-tll-interface

Been able to print correctly text & bar-codes on thermal paper.


2. Apart from that regualr thermla paper, there also sticker roll that comes like in this link : https://drive.google.com/open?id=1HWolIvnxBKlPsA-qL0ONkOavmunGPmAV

3. It has small slots to identify start & end point of sticker. I cn print on it, but text gets also printed outside the sticker. is ther any way I can identify start & end point of sticker, so that I can print on sticker only.

 

If the printer has a sensor to detect the label edges (probably the black mark between the lables) then the manual will detail how to use this. If it has no sensor then the best you can do is to match the print size to the label size but there will probably still be drift and the printing will wander off the label.