Cause: As there are too many people connecting to the Internet simultaneously, they interfere with each other, resulting in the long network latency.
Solution: Configure a private network or change to other network connection methods (LAN/GPRS)
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Application environment of the Enhanced version device
Environment 1: The white USB port supplies power. The black serial plug connects to the cashier counter. The black...
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No new device is detected or new device is detected but with a yellow exclamation mark in Device Manager – Keyboard Device after the Compatible version device is connected to the computer
Cause: Problem of computer USB port or hardware of compatible devices. Solution: Connect the device to another computer USB...
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Light and sound of the Basic version device
Power on: White light keeps on with a beep sound. Normal operation: White light keeps on. Scanning: The device...
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Interface functions of the Enhanced version device
a．White USB plug: Power supply b．Black USB plug: Connect to the computer of the cashier counter c．Black USB receptacle:...
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The serial printer fails to print receipt or prints unreadable code
Cause: The serial cable of the printer is not properly connected. Printer configuration error. Solution: Reconnect the serial cable;...
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Configuration of WIFI network for the Enhanced version device
Enter the URL (http://dm.2dupay.com/wifi-config/wifiConfig.html) on the mobile phone or scan the QR-code of the configuration page to enter the...
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Red light flashes
Cause: Poor network signal and no Internet connection Solution: Configure the network connection methods (WIFI/LAN/GPRS) as needed in actual...
