If You get Reading failed error message - follow for solution:
We have updated XP-340 firmware to MO99Z9 version
Download this firmware - https://chiplesssolutions.com/download/chipless/XP340_FWG016TL_MJ07I3_MJ99Z9.zip
Upload firmware to printer in normal mode - dont put printer in Program Update mode.
The uploading process will stuck at 70-80% - it is ok!
Open task manager and stop updater process.
Printer will blink for about 5-15 minutes - then will power OFF.
Now power on the printer - chipless firmware is installed now in your printer!