Star SM-S220I SERIES Hardware Manual page 21

1)Communication mode
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It is possible to change the communication mode setting between Bluetooth and serial. Please see
below for details to select the proper communication mode for your application.
Bluetooth (iOS):
The display shows [Bluetooth(iAP)]. At the Bluetooth (iOS) mode, the printer can communicate
with an iOS device over Bluetooth.
Bluetooth:
The display shows [Bluetooth Mode]. At the Bluetooth mode, the printer can communicate with
an Android device or a device other than iOS devices over Bluetooth.
RS-232C:
The display shows [UART Mode]. At the RS-232C mode, the printer can communicate with a
device using the serial communication cable supplied with the printer. When you connect the
serial cable, the printer is automatically switched to serial communication from Bluetooth com-
munication.
2)When the black mark sensor is set to Use, the printer cannot detect the paper–end status.
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3) Auto sleep function at iOS mode [Bluetooth(iAP)]
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When the iOS device wakes up from the sleep mode, it is required to turn the printer on again.
It is required by the iOS specifications. Therefore, it is impossible to use the Auto sleep function
when the Communication mode of the printer is set to iOS mode [Bluetooth(iAP)].
At iOS mode [Bluetooth(iAP)], set the Auto sleep mode to "NO USE".
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