Limitation of 10 smart card readers with SCardListReaders

Many customers have noticed that the Windows’ PC/SC subsystem is not able to handle more than 10 readers (or slots in case of multi-slot readers). Actually, the SCardListReaders function -the system call to get the list of available PC/SC readers- is limited to 10 readers max. On old versions of Windows it was possible (although complex) to overcome this limitation by grouping the readers in “reader groups” and querying one group after the other. This is not possible anymore, starting with Windows 8.

Microsoft clearly states in KB #3144446:

Starting in Windows 8, the Windows platform supports a maximum of 10 smartcard readers. If more than 10 smartcard readers are available, APIs such as SCardListReaders return a maximum of 10. All other readers are ignored.

So, sorry, but there’s no way to use more than 10 PC/SC readers (or slots) on a Windows 8 or Windows 10 system. To make things clear, if you connect 2 SpringCard CSB HSP or 2 SpringCard CrazyWriter HSP with the +3 SIM/SAM expansion board, you already have reached the limit.

SpringCard NetPCSC for PCSC-Lite

Introduction

In 2016, SpringCard introduces a new family of network-attached NFC/RFID couplers, providing PC/SC functionnality on top of TCP/IP. The family is built from the SpringCard E663 module, the Ethernet-world counterpart of H663 (for USB world) and K663 (for serial world). The two first products of the family are the TwistyWriter-IP PC/SC, made for OEMs, and the FunkyGate-IP PC/SC, targetting access-control applications. The second one is also available as a FunkyGate-IP+POE PC/SC, where ‘POE’ stands for ‘power-over-Ethernet’, i.e. the device takes its power from the network cable.

To support all the devices based on the E663 module, SpringCard has developed from scratch a PC/SC driver for Windows (see this page).

Read More

SpringCard NetPCSC for Windows

Introduction

In 2016, SpringCard introduces a new family of network-attached NFC/RFID couplers, providing PC/SC functionnality on top of TCP/IP. The family is built from the SpringCard E663 module, the Ethernet-world counterpart of H663 (for USB world) and K663 (for serial world). The two first products of the family are the TwistyWriter-IP PC/SC, made for OEMs, and the FunkyGate-IP PC/SC, targetting access-control applications. The second one is also available as a FunkyGate-IP+POE PC/SC, where ‘POE’ stands for ‘power-over-Ethernet’, i.e. the device takes its power from the network cable.

To support all the devices based on the E663 module, SpringCard has developed from scratch a PC/SC driver for Windows.

Read More