two tasks to create a raw printing command to print on Sunmi V2 machine for POS invoices and to add a costumized printing format for the attached invoice

We are using a web-based erp for our POS, and for the distribution we purchase Sunmi V2 machine
https://www.sunmi.com/en-US/v2/
we need assistant for the raw printing command for this machine to work with the web-based erp (erpnext).
and the attached invoice we need to create a same format invoice in the web-based erp (erpnext)