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Appendix
Notes on use
Time required until printing starts
If the host computer and the printer are not connected on a continuous basis but rather connected every time
the printer starts printing, some time may be needed for the printer to actually start printing after the host
computer commands printing. This pause is the time required for processing the connection between the host
computer and the printer.
After opening the port, leave an interval of 300 msec or more before sending data to the port.
Timing to shut the connection off
If a connection between the host computer and the printer is shut off while the printer is offline, it may not be
re-established. In this case, first clear the printer offline causes, and then try to re-establish the connection.
Multi-tone printing
When performing multi-tone printing over Bluetooth, the print speed may fluctuate or intermittent printing
may occur due to data transfer conditions, also the print shade may change or white lines may occur.
Interference from Wi-Fi
2.4 GHz Wi-Fi may interfere with Bluetooth communication. Using the optional Wireless LAN unit with 2.4
GHz may disrupt Bluetooth communication or printing. 5 GHz Wi-Fi is recommended when using Wi-Fi with
Bluetooth.
Notes when communicating with Android devices
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The printer cannot connect to Android 2.3 and 2.3.2.
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When communicating with Android 2.3.3 or later versions, communicate through an insecure connection.
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When connecting an Android device to the USB connector (USB-A – Device Charging) for data
communication, make sure that the device satisfies the following requirements.
Requirements: The version of Android OS is 10 or later with kernel version 4.9.15 or later
However, Epson does not guarantee normal operation of all Android devices even if they satisfy the
requirements. Run some tests before actually using the device.
Notes when communicating with iOS devices
Print data deletion and Bluetooth disconnections occur
Situation
Depending on the specifications of the iOS device, print data sent to the printer may be deleted. When this
occurs, the Bluetooth connection between the printer and the iOS device is disconnected.
Conditions
This occurs when the printer is not ready to print, and 64 KB or more of print data is sent to the printer.
<Status in which the printer cannot print>
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When the roll paper cover is open
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When the paper is out
