Fingerprint scanner (GT-511C3) developed by ADH-Tech utilizes TTL Serial for communication, making it simple to embed in a project. This small size embedded module consists of an optical sensor and a circuit board. The sensor is mounted on the circuit board.
How it works?
Fingerprint scanning is done by the optical sensor and module functionality is provided by the microcontroller; the software then processes the scanned fingerprint. The scanner needs to be connected to Linux PC or Mac via USB to TTL adapter, the software then runs on the windows.
Procedure
Only commands are required to be sent to the module, the rest of the reading and identification of scanned fingerprints is done by the module itself. Registering each fingerprint involves sending the corresponding command to the module and simply pressing the finger against the reader. This scanner has the database of fingerprints that one can also download from the module for further distribution to other modules. With this module, it’s even possible to obtain the raw fingerprint image via an optical sensor. It has the storage capacity of up to 200 fingerprints.
Features
- Provides fast and accurate fingerprint identification utilizing SmackFinger 3.0 algorithm.
- Convenient to download fingerprint images from the module unit.
- The database can be accessed easily and when needed it can be used to distribute fingerprints images to other modules.
- Uses UART protocol
- Efficiently does 1:1 verification and 1: N identification.
Specification of Fingerprint Scanner(GT-511C3):
- Dimension (L*W*H): 37 x 17 x 9.5 mm
- Sensing area: 14×12.5 mm
- Storage capacity: 200 fingerprints
- Resolution: 450 dpi
Pin Description:
Fingerprint scanner TTL (GT-511C3) has four basic pins: power, ground, serial transmit pin, and serial receive pin.
| Pins | Description |
| UART Transmit | Transmits a voltage up to 3.3 V |
| UART Receive | Receives a voltage up to 3.3 V |
| Gnd | Ground or 0V |
| V (in) 5V | Input voltage to power the module. |
Applications
The module has numerous applications such as:
- User identification at workplaces.
- Instant access to hotel rooms via finger scanning instead of a key.
- Provides safe access as its impossible to duplicate one’s fingerprints.
- Serve as a security measure in addition to face and voice recognition.
