Please follow the steps below to change the POS mode from Slave to Master:
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Open the dropdown menu on the POS.
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Tap Settings.
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Select Connection.
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Change the Mode to Master.
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Enter the validation PIN when prompted.
Validation PIN Information
The validation PIN is always based on the current date and month.
Format: DDMM
Example:
If today is 29 November, the validation PIN is 2911.