Gemalto PC Twin Reader

Banking

Thales·USB

Overview

The Gemalto PC Twin Reader (now marketed under the Thales brand following the Gemalto acquisition) is a dual-slot contact smart card reader that has become the standard terminal reader in West African banking. It supports two independent card slots, ISO 7816 T=0/T=1 protocols, and communicates via USB CCID. Its EMV Level 1 certification and long track record in regulated financial environments make it a trusted choice for deployments that also need to handle banking or SIM cards alongside DREWQ identity verification.

Requirements

USB-A port (USB 2.0 or higher)
PC/SC daemon (pcscd on Linux/macOS, built-in on Windows 10+)
Python 3.9+ with pyscard
Card inserted into Slot 0 (the bottom slot) for DREWQ reading

Setup Guide

Connect the Reader

Steps

Plug the PC Twin Reader into a USB-A port using the supplied cable.

The reader has two slots: Slot 0 (bottom) and Slot 1 (top). Use Slot 0 for DREWQ.

The OS loads the CCID driver automatically; no Thales/Gemalto software is required.

The LED on the active slot illuminates when a card is inserted.

Configure PC/SC

Steps

macOS: `brew install pcsc-lite && brew services start pcsc-lite`

Ubuntu/Debian: `sudo apt-get install -y pcscd pcsc-tools && sudo systemctl enable --now pcscd`

Install pyscard: `pip install pyscard`

Note: the PC Twin Reader registers as TWO reader names in pcsc_scan — one per slot.

Verify Detection

Steps

Run `pcsc_scan` — you will see two entries: `Gemalto PC Twin Reader [CCID] 0 0` and `...0 1`.

The DREWQ API auto-selects the first reader with a card present.

Insert a card into Slot 0 and confirm `GET /card/status` returns `card_present: true`.

Python: `from smartcard.System import readers; print(readers())` should show both slots.

Test with the API

Steps

Start the server: `uvicorn main:app --reload`

POST to `/card/scan` with BAC fields — the API selects Slot 0 automatically.

If the API picks the wrong slot, ensure the card is in Slot 0 (bottom).

Confirm the scan log via `GET /scans?limit=1`.

Troubleshooting

API reports two readers and scans the wrong slot

The PC Twin Reader registers as two separate PCSC reader names. The API defaults to the first reader with a card present. Insert the DREWQ into Slot 0 (bottom). If needed, set `READER_INDEX=0` in the API's environment variables.

Old Gemalto driver installed, causing conflicts

Legacy Gemalto GemPC drivers conflict with the built-in CCID driver on Windows. Uninstall them via Programs and Features, then rely on Windows' built-in CCID support.

Second slot not detected by pcscd

Some older libccid versions enumerate only the first slot. Update libccid to 1.5.0+: `sudo apt-get install --upgrade libccid` on Ubuntu.

Need more help?

Check the full documentation or the reader compatibility guide for additional context.