You won’t be able to integrate that reader, and I don’t know how it works in Taipei but in Hong Kong we have Octopus card which is stored value similar to what you say and it is used in many shops as payment method, however integration with their proprietary hardware is very expensive as they charge you a lot just to get the info and just won’t be possible. However in Hong Kong they also have a stand alone device to accept Octopus cards so you might want to see if the Taipei system has something similar, then you just add the payment method to SambaPOS like any other but process the payment on the stand alone terminal.
This is the stand alone reader they use in Hong Kong for Octopus cards that doesn’t require any integration:
http://www.octopus.com.hk/web09_include/_images/octoContentImages/octoContentImage29e.gif
More info is here: Retail - Octopus Hong Kong