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Fix "Device detection failed!" error

Sometimes we get a “Device detection failed!” error message in RTK Viewer when connecting Alpha units with a PC.

It is quite likely caused by the fact the switch is switched to the right-hand side (position “B”). The root cause is, RTK Viewer needs the switch set at position “A” to read Alpha’s version information during the initial state of USB plugin.

So please switch to position A when you plug in Alpha into PC, to avoid this error.