How to Connect Bluetooth Receipt Printer

Hello everyone
I would like to change the POS commands in the app to open the cash drawer. The command for my MUNBYN bluetooth printer is 27,112,0,50,250 , but LOYVERSE app will not allow the entry of more than 2 digits before a comma, 3 digits can not be entered before a comma. Any assistance is greatly appreciated. 

I use an ios device (Apple Ipad) and have connected a Bluetooth ticket printer. That works fine.
Now, I will integrate my sumup credit card device on my Loyverse, but this device is also connected with bluetooth with the ios device. 
Now is my question, can this works both toghter (bluetooth printer and Bluetooth credit card SumUp device) on my Loyverse device?(Apple Ipad)
Thanks for helping!

This video shows step-by-step how to set up an Ethernet receipt printer to the Loyverse POS, using the example of an Epson TM-m30.

Video how to set up STAR 100 Ethernet printer to iOS.