4 - Operation
eDynamo| Secure Card Reader Authenticator | Installation and Operation Manual
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4
Operation
4.1
About Operating Modes
During operation, eDynamo transitions between six distinct modes, each of which behaves differently:
Reset Mode
occurs when the user presses and holds the pushbutton for 5 to 10 seconds. After
resetting, the device progresses to Airplane Mode. If the device is connected to USB power, it
immediately progresses to Discoverable Mode.
Airplane Mode
is the shipping mode of the device. In Airplane
mode, the device consumes very
little power. The device may or may not be paired with one or more Bluetooth LE hosts, but it does
not advertise or communicate over Bluetooth LE. To move the device from Airplane Mode to
Discoverable Mode, press the pushbutton briefly or connect the device to USB power. To move the
device from Airplane Mode to Pairing Mode, press and hold the pushbutton for two seconds.
Connecting to a USB host automatically moves the device to Connected Mode.
Discoverable Mode
is the device’s normal low-power waiting state. The user activates this mode
when the device is not connected to USB by briefly pressing the pushbutton once while in Airplane
Mode. In this mode, the device remains paired with any previously paired Bluetooth LE hosts but is
not connected to transmit data. Upon entering Discoverable Mode, the device advertises itself over
Bluetooth LE, and any paired Bluetooth LE host may initiate a connection. If the device is
configured to transmit data over USB and is connected to a USB host, it immediately progresses from
Discoverable Mode to Connected Mode.
Pairing Mode
is activated by pressing the pushbutton for two seconds, waiting for the Bluetooth
Status LED to flash off three times, and releasing the pushbutton. In this mode, an unpaired
Bluetooth LE host may initiate pairing. Upon entering Pairing Mode, the device advertises itself over
Bluetooth LE, and the Bluetooth Status LED flashes once every two seconds. The device continues
to be pairable until it pairs with a Bluetooth LE host or until the optional pairing timeout period
expires. If the pairing timeout period is 0 (no timeout), the Bluetooth Status LED stops flashing after
one minute to conserve power, but the device continues advertising. Upon successful pairing, the
device enters Discoverable Mode.
Connected Mode
occurs when the device is connected to a USB host, or when a paired Bluetooth LE
host initiates a connection (generally in response to the host software’s graphical user interface). In
this mode the host and the device can both initiate communication, and it is the host’s responsibility
to terminate the connection and return the device to Discoverable Mode to save power when an active
data connection is no longer needed for the current transaction. In this mode, the device does not
advertise and is not discoverable by other paired Bluetooth LE hosts.
Tamper Mode
means a self-test has failed or a tamper has been detected. Upon entering this mode,
the device must be returned to the manufacturer for physical inspection and a factory reset. The
following can cause the device to enter this mode:
o
The device has been opened.
o
The coin cell battery inside the device has discharged below its minimum operating voltage.
If the coin cell is completely discharged, the device does not respond to commands.
