This usually happens due to a baud rate mismatch or using the wrong driver. Reinstall using the Generic/Text Only driver to test basic connectivity.
Getting your mobile thermal printer set up shouldn't be a headache. Whether you are using a for retail receipts or logistics, having the right driver is the difference between a smooth workflow and a "device not recognized" error. thermal printer mobile lk 6018 driver download upd
Search for exact model + “driver” from these sources: This usually happens due to a baud rate