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How to check the current installed software version?

1.Power on TS8211 to display “Hello”
2.Short Press Power key on panel button or RC button, Sbar will show “Sleep”
3.Then long press RC “OK” key 5s, VFD will show “Wait”
4.Then VFD will show “Version”, press RC “OK” key, it will show Version, press RC “Volume Down“ key, it will jump to show other module version. The M xxx is means the main version.
5.You can short press “Power“ key to exit check version, short press “Power“ key again to go back normal work mode.