3 - Operation
iDynamo 5 and iDynamo 5 (Gen II)| Secure Card Reader Authenticator | Installation and Operation Manual
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3
Operation
3.1
Power Management
3.1.1
About Power
During normal operation, iDynamo is powered either from its connection to the host or from a connection
to a USB power source. When properly powered through its USB port, the device powers the connected
iOS host through the Lightning port. While the host charges this way, the device consumes more power
from the USB connection than when the host’s battery is fully charged. For details about setting up pass-
through charging, see section
3.1.2 How to Set Up Pass-Through Charging
To save power, iDynamo enters low power mode when an app does not have an active session with it, and
will remain in low power mode until the app restarts or re-initiates a session. While an app has an open
session, a cardholder may swipe a card through the magnetic stripe reader slot. When the device is not
connected to USB power, the host would generally open a session with the device to process a
transaction, then close the session after the transaction is complete to transition the device to low power
mode and conserve power. When the device is powered by the USB-C connector, the host software may
choose to always keep a session open with the device.
If iDynamo does not receive adequate power from the host or its USB connector, the device powers off.
The device also draws a trickle of power from the connected iOS host to power the magnetic stripe reader
head. The host’s operating system manages this power flow when the device is not in use to save power.
