4 - Operation
mDynamo| EMV Contact Reader / Transaction Hub Module | Installation and Operation Manual
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4
Operation
Before use, make sure mDynamo is connected to a USB host. Generally the host software will always
keep a connection open to the device via the USB port, and the device indicates it is ready for a
transaction or host command by keeping the General Status LED green.
4.1
Card Reading / Transactions
EMV transactions begin when the host software initiates them. After the cardholder properly inserts a
contact chip card into the slot, the device will communicate with the card and notify the host. The host
software may choose to use these notifications to provide additional feedback (such as audible, visual, or
tactile feedback) to guide the cardholder to leave the card inserted until the transaction is complete, then
to remove the card. Programmers of host software should see section
for cross-references to programming tools and documentation for communicating with the device.
Cardholders will generally rely on guidance provided by the solution’s enclosure (see section
to properly orient chip cards before inserting them into the card insertion slot. The
solution should guide cardholders to insert chip cards all the way into the slot until the card touches the
card stop / switch. They may feel a slight click when the latch engages.
Before and during transactions, an operator may control or monitor the device using the host software and
the General Status LED. See section
4.2 About the General Status LED
for assistance interpreting the
device’s LED patterns. Solutions that use the
supplemental documentation about how to read customized LED patterns.
