Failed to print text in RPP320

[rushasdev]

After deploying the app to an Android 10 device, I successfully managed to list and connect to my mobile printer (rongta rpp320).

However, it is not possible to get a printout. I'm guessing that it has something to do with printing preferences (e.g. width or height) Is there a way to set such printing options before sending the text to print? Or is it have something to do with something else?

Steps to reproduce:

• Deploy the application to Android 10 (Samsung A71) device.
• Launch the application
• Tap Scan to retrieve the available BL device list
• Tap on RPP320 mobile printer
• Tap the 'Print' button

After hitting the Print button, a success message pops up ('Yayy" "Data Printed") and my mobile printer also wakes up from sleep mode, so obviously connection and sending the print signal is successfull. But nothing happens afterwards.

Thanks in advance for your help.