ACR3901T-W1 – Reference Manual
Version 1.02
www.acs.com.hk
Page 11 of 100
5.4. User Interface
ACR3901T-W1 has two buttons and two LEDs (One Single Color: Red; One Bi-color: Green and
Blue).
5.4.1.
Buttons
ACR3901T-W1 has three modes: USB, Off, and Bluetooth. User can perform one mode at a time as a
data transmission interface.
•
Button (Front) - Power On, Power Off or Wake Up the reader; Simulate SAM card removal
event.
-
Once pressed, the reader will power on and the default mode is the Bluetooth mode.
Once connected through a computer, it will automatically switch to USB mode.
Meanwhile, a long press will power off the device.
•
Button (Back) - Reset the reader
5.4.2.
Status LEDs
ACR3901T-W1 has two LEDs (One Single Color: Red; One Bi-color: Green and Blue) to show various
operation status, where:
•
Red LED -
Battery status
•
Blue LED -
Card and reader status under Bluetooth mode
•
Green LED -
Card and reader status under USB mode
Color
LED Activity
Status
Red
On
The battery is charging (will turn OFF after battery is fully charged)
Slow flash
(1 second/flash)
The battery needs to be charged
Blue
Fast–Slow flash
(Fast: 250 ms/flash;
Slow: 500 ms/flash)
Ready for Bluetooth device pairing
Slow flash
(2 seconds/flash)
Bluetooth device connected and no card operation
Fast flash
Data transferring between the reader and mobile device
On
Card is connected and powered on
Green
Slow flash
(2 seconds/flash)
No card operation and the reader is waiting for PC instructions
Fast flash
Data transferring between the reader and PC
On
Card is connected and powered on
Table 4
: LED Status
Note: When red, blue and green LEDs are OFF, the reader is powered off. Both blue and green LEDs
will light for 1 second, and then will turn off when the reader receives critical error codes from the
Bluetooth module.