PySerial And Interfacing R305 Using python.

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# PySerial Package and Interfacing R305 using Python.

---

# Agenda

* Introduction to Serial Interface/UART/TTY

* PySerial basics

* R305

*  R305 working

* python-R305 package

---

# Introduction to Serial Interface/UART/TTY

* Interface through which data is transfered in or out one bit at a time.

* Used to connect the devices like modems, terminals etc.

* Serial Port is used as synonym for RS232.

* Baudrate: Bits per second. (1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200.)

* Pins: RX, TX, GND, VCC (for USB to TTL convertor).

* /dev/tty*

---

## Installation

```bash
$ pip install pyserial

```

## Usage

```python
import serial
ser = serial.Serial('/dev/ttyUSB0', 9600)  # open serial port
print(ser.name)                            # check which port was really used
ser.write('hello')                         # write a string
print(ser.read(ser.in_waiting))            # read the incoming string  
ser.close()                                # close port

```
---

---

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R305 is a low cose fingerprint identification module.

It can store upto 256 fingerprints in it.

which makes it a grate option for academic projects.

This module is operated on UART thus can be used with microcontrolers,
Raspberry Pi and also with any other computer (using USB to UART convertor).

---

---

## Data Packet

<img src="R305-data-packet.png"></img>
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Fingerprint processing includes two parts:
fingerprint enrollment and fingerprint matching
(the matching can be 1:1 or 1:N).

When enrolling, user needs to enter the finger two times.
 The system will process the two time finger images, generate a template
of the finger based on processing results and store the template.

When matching, user enters the finger through optical sensor and system
 will generate a template of the finger and compare it with templates 
 of the finger library.

Source:http://fingerprint-module-r305-python-and-mysql.readthedocs.io/en/latest/index.html

---

## Installation

```bash
$ pip install R305
```

Github Repo

https://github.com/girish946/python-R305

Documentation

http://python-r305-doc.readthedocs.io/en/latest/index.html

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# Python-R305 Package
## Storing fingerprint.

```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-

from r305 import R305
import sys

device   = sys.argv[1]
baudrate = sys.argv[2] # the default baudrate for this module is 57600

dev = R305(device, baudrate)

def callback(data):
    x = raw_input(data)

result = dev.StoreFingerPrint(IgnoreChecksum=True, callback=callback)
print(result)
```

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## Searching Fingerprint

```python
#!/usr/bin/env python
# -*- coding: utf-8 -*-

from r305 import R305
import sys

device   = sys.argv[1]
baudrate = sys.argv[2] # the default baudrate for this module is 57600

dev = R305(device, baudrate)

result = dev.SearchFingerPrint()
print(result)
```

---

http://python-r305-doc.readthedocs.io/en/latest/Python-R305.html

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# Refrences

* [DataSheet](http://www.rhydolabz.com/documents/finger-print-module.pdf)

* [Fingerprint DataBase Example](http://fingerprint-module-r305-python-and-mysql.readthedocs.io/en/latest/index.html)

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#  Thank You

<a href="https://twitter.com/girish946">@girish946</a>

http://girishjoshi.io