Python Archieven - DomoticX Knowledge Center

Module – PN532 – RFID/NFC transciever

Door Sebastiaan Geplaatst op 2021-06-14 Geplaatst in C++ Script (Arduino), Python Script, Randapparatuur op de Arduino, Randapparatuur op de Raspberry Pi (GPIO), Sensor en Module Tagged with Aansluiten, Arduino, Datasheet, NFC, NXP, Pinout, PN532, Python, Raspberry, RFID

BESTELLEN Informatie (ENG) The PN532 is a 13.56 MHz RFID reader chip. It’s common and very easy to interface to with the PN532 module. Features and Specifications: 80C51 microcontroller core with 40 Kbyte ROM and 1 Kbyte RAM Highly integrated …

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CAN Bus – MME-BOOT MCP2515 XMega Bootloader

Door Sebastiaan Geplaatst op 2021-05-13 Geplaatst in CAN-Bus Software, Python Script Tagged with CAN, CAN Bus, Plugin, Python, Raspberry pi

source: https://community.atmel.com/projects/mme-boot-complete-can-bus-mcp2515-xmega-bootloader-aes-and-software-encrypt-update TYPE: Complete code COMPILER/ASSEMBLER: Atmel Studio 6 I’ve recently migrated one of my devices to CAN BUS which meant that I had to build the firmware upgrade tool for my customers as well. I’ve looked all around the …

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Module – RC522 – RFID/NFC transciever

Door Sebastiaan Geplaatst op 2021-01-13 Geplaatst in C++ Script (Arduino), Python Script, Randapparatuur op de Arduino, Randapparatuur op de Raspberry Pi (GPIO), Sensor en Module Tagged with Aansluiten, Arduino, Datasheet, NFC, NXP, Pinout, Python, Raspberry, RC522, RFID

BESTELLEN Informatie (ENG) The RC522 RFID module based on MFRC522 IC from NXP is one of the most inexpensive RFID options that you can get online for less than four dollars. It usually comes with a RFID card tag and key fob …

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Python – CAN Bus uitlezen

Door Sebastiaan Geplaatst op 2020-12-17 Geplaatst in CAN-Bus Software, Python Script Tagged with CAN, CAN Bus, Plugin, Python, Raspberry pi

Op deze pagina vind je een voorbeeld hoe je CAN Bus uitleest in Python3 Wat heb je nodig? Python library: python-can python-can-3.3.4 Installatie: git clone https://github.com/hardbyte/python-can.git Cloning into ‘python-can’… remote: Enumerating objects: 18, done. remote: Counting objects: 100% …

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Python – Multithreading

Door Sebastiaan Geplaatst op 2020-06-10 Geplaatst in Python Script Tagged with Multithreading, Python

Source: https://www.programiz.com/python-programming/time/sleep Multithreading in Python Before talking about sleep() in multithreaded programs, let’s talk about processes and threads. A computer program is a collection of instructions. A process is the execution of those instructions. A thread is a subset of the process. …

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USB – HID human interface device

Door Sebastiaan Geplaatst op 2020-06-10 Geplaatst in Randapparatuur op de Raspberry Pi (USB), USB Apparaten Tagged with Barcode, EVDEV, HID, Human Interface Device, Keyboard, Python

With this python script you can capture keyboard (emulators) and barcode scanners trough evdev (event device), this way the part of code will only execute when the device is sending keys:

from evdev import *
dev = InputDevice('/dev/input/event1')

print(dev)

for event in dev.read_loop():
    if event.type == ecodes.EV_KEY:
        print(categorize(event))

from evdev import *

dev = InputDevice('/dev/input/event1')

print(dev)

for event in dev.read_loop():

if event.type == ecodes.EV_KEY:

print(categorize(event))

output:

key event at 1383327570.147000, 2 (KEY_1), down
key event at 1383327570.147990, 2 (KEY_1), up
key event at 1383327570.148997, 3 (KEY_2), down
key event at 1383327570.150010, 3 (KEY_2), up
key event at 1383327570.151009, 29 (KEY_LEFTCTRL), down
key event at 1383327570.151009, 42 (KEY_LEFTSHIFT), down
key event at 1383327570.152017, 36 (KEY_J), down
key event at 1383327570.153005, 36 (KEY_J), up
key event at 1383327570.154004, 29 (KEY_LEFTCTRL), up
key event at 1383327570.155005, 32 (KEY_D), down
key event at 1383327570.155993, 32 (KEY_D), up
key event at 1383327570.157002, 48 (KEY_B), down
key event at 1383327570.158015, 48 (KEY_B), up
key event at 1383327570.158997, 48 (KEY_B), down
key event at 1383327570.282002, 18 (KEY_E), up
key event at 1383327570.283004, 49 (KEY_N), down
key event at 1383327570.284005, 49 (KEY_N), up
key event at 1383327570.284968, 18 (KEY_E), down

key event at 1383327570.147000, 2 (KEY_1), down

key event at 1383327570.147990, 2 (KEY_1), up

key event at 1383327570.148997, 3 (KEY_2), down

key event at 1383327570.150010, 3 (KEY_2), up

key event at 1383327570.151009, 29 (KEY_LEFTCTRL), down

key event at 1383327570.151009, 42 (KEY_LEFTSHIFT), down

key event at 1383327570.152017, 36 (KEY_J), down

key event at 1383327570.153005, 36 (KEY_J), up

key event at 1383327570.154004, 29 (KEY_LEFTCTRL), up

key event at 1383327570.155005, 32 (KEY_D), down

key event at 1383327570.155993, 32 (KEY_D), up

key event at 1383327570.157002, 48 (KEY_B), down

key event at 1383327570.158015, 48 (KEY_B), up

key event at 1383327570.158997, 48 (KEY_B), down

key event at 1383327570.282002, 18 (KEY_E), up

key event at 1383327570.283004, 49 (KEY_N), down

key event at 1383327570.284005, 49 (KEY_N), up

key event at 1383327570.284968, 18 (KEY_E), down

Another python script example:

import evdev
from evdev import InputDevice, categorize  # import * is evil :)
dev = InputDevice('/dev/input/event1')

# Provided as an example taken from my own keyboard attached to a Centos 6 box:
scancodes = {
    # Scancode: ASCIICode
    0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',
    10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R',
    20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL',
    30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';',
    40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N',
    50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'
}
for event in dev.read_loop():
    if event.type == evdev.ecodes.EV_KEY:
        data = evdev.categorize(event)  # Save the event temporarily to introspect it
        if data.keystate == 1:  # Down events only
            key_lookup = scancodes.get(data.scancode) or u'UNKNOWN:{}'.format(data.scancode)  # Lookup or return UNKNOWN:XX
            print u'You Pressed the {} key!'.format(key_lookup)  # Print it all out!

import evdev

from evdev import InputDevice, categorize # import * is evil :)

dev = InputDevice('/dev/input/event1')

# Provided as an example taken from my own keyboard attached to a Centos 6 box:

scancodes = {

# Scancode: ASCIICode

0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',

10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R',

20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL',

30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';',

40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N',

50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'

}

for event in dev.read_loop():

if event.type == evdev.ecodes.EV_KEY:

data = evdev.categorize(event) # Save the event temporarily to introspect it

if data.keystate == 1: # Down events only

key_lookup = scancodes.get(data.scancode) or u'UNKNOWN:{}'.format(data.scancode) # Lookup or return UNKNOWN:XX

print u'You Pressed the {} key!'.format(key_lookup) # Print it all out!

Output: …

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Apparaat – RS232 – Seriële communicatie

Door Sebastiaan Geplaatst op 2018-12-08 Geplaatst in C++ Script (Arduino), Diverse onderwerpen (Arduino), Diverse onderwerpen (Raspberry Pi), Python Script, Sensor en Module Tagged with Apparaat, Arduino, computer, hex strings, Python, Raspberry pi, RS232, Sensor, Serieel, seriele

Het volgende voorbeeld laat zien hoe je HEX strings naar een serieel RS232 apparaat stuurt en dan het “antwoord” uit kan lezen in HEX strings. C++ / Arduino

#include <SoftwareSerial.h>

byte command[2] = {0xAA, 0x41};
byte response[5]; 

SoftwareSerial rs232device(10, 11, SERIAL_8N1); // TX, RX.

void setup() {
  Serial.begin(9600);
  rs232device.begin(9600); 
}

void loop() {
  rs232device.write(command, sizeof(command));
  rs232device.readBytes(response, 5);

  Serial.print(response[0], HEX);Serial.print(" ");
  Serial.print(response[1], HEX);Serial.print(" ");
  Serial.print(response[2], HEX);Serial.print(" ");
  Serial.print(response[3], HEX);Serial.print(" ");
  Serial.println(response[4], HEX);
  delay(500);
}

#include <SoftwareSerial.h>

byte command[2] = {0xAA, 0x41};

byte response[5];

SoftwareSerial rs232device(10, 11, SERIAL_8N1); // TX, RX.

void setup() {

Serial.begin(9600);

rs232device.begin(9600);

}

void loop() {

rs232device.write(command, sizeof(command));

rs232device.readBytes(response, 5);

Serial.print(response[0], HEX);Serial.print(" ");

Serial.print(response[1], HEX);Serial.print(" ");

Serial.print(response[2], HEX);Serial.print(" ");

Serial.print(response[3], HEX);Serial.print(" ");

Serial.println(response[4], HEX);

delay(500);

}

Python / Raspberry Pi

#!/usr/bin/env python

import serial
import time

#-------------------------------------------------------------------------------

def ByteToHex( byteStr ):
    """
    Convert a byte string to it's hex string representation e.g. for output.
    """
    
    # Uses list comprehension which is a fractionally faster implementation than
    # the alternative, more readable, implementation below
    #   
    #    hex = []
    #    for aChar in byteStr:
    #        hex.append( "%02X " % ord( aChar ) )
    #
    #    return ''.join( hex ).strip()        

    return ''.join( [ "%02X " % ord( x ) for x in byteStr ] ).strip()

#-------------------------------------------------------------------------------

def HexToByte( hexStr ):
    """
    Convert a string hex byte values into a byte string. The Hex Byte values may
    or may not be space separated.
    """
    # The list comprehension implementation is fractionally slower in this case    
    #
    #    hexStr = ''.join( hexStr.split(" ") )
    #    return ''.join( ["%c" % chr( int ( hexStr[i:i+2],16 ) ) \
    #                                   for i in range(0, len( hexStr ), 2) ] )
 
    bytes = []

    hexStr = ''.join( hexStr.split(" ") )

    for i in range(0, len(hexStr), 2):
        bytes.append( chr( int (hexStr[i:i+2], 16 ) ) )

    return ''.join( bytes )

#-------------------------------------------------------------------------------

# USB D- = RXD TTL STICK
# USB D+ = TXD TTL STICK

### POORT INSTELLINGEN
ser = serial.Serial()
ser.port = "/dev/ttyUSB0"
ser.baudrate = 9600
ser.parity=serial.PARITY_NONE
ser.stopbits=serial.STOPBITS_ONE
ser.bytesize=serial.EIGHTBITS
ser.timeout=1

try: 
    ser.open()
    print("Connected to: " + ser.portstr)
except Exception, e:
    print "error open serial port: " + str(e)
    exit()

while 1:
  ### METHODE #1
  ser.write([0xAA, 0x41])

  ### METHODE #2
  #ser.write(serial.to_bytes([0xAA,0x41]))

  ### METHODE #3
  #ser.write("\xAA\x41")

  ### METHODE #4
  #ser.write(chr(0xAA))
  #ser.write(chr(0x41))

  ### METHODE #5
  #msg = bytearray([0xAA, 0x41])
  #ser.write(msg)

  #data = ser.read(8) ### AANTAL BYTES LEZEN
  data = ser.readline() ## HELE LIJN LEZEN
  #data = ser.readall() ### ALLES LEZEN

  print "SIZE: ", len(data)
  print "RAW: " + data
  print "HEX1: " + ByteToHex(data)
  print "HEX2: " + data.encode('hex')

  time.sleep(2)

#!/usr/bin/env python

import serial

import time

#-------------------------------------------------------------------------------

def ByteToHex( byteStr ):

"""

Convert a byte string to it's hex string representation e.g. for output.

"""

# Uses list comprehension which is a fractionally faster implementation than

# the alternative, more readable, implementation below

# hex = []

# for aChar in byteStr:

# hex.append( "%02X " % ord( aChar ) )

# return ''.join( hex ).strip()

return ''.join( [ "%02X " % ord( x ) for x in byteStr ] ).strip()

#-------------------------------------------------------------------------------

def HexToByte( hexStr ):

"""

Convert a string hex byte values into a byte string. The Hex Byte values may

or may not be space separated.

"""

# The list comprehension implementation is fractionally slower in this case

# hexStr = ''.join( hexStr.split(" ") )

# return ''.join( ["%c" % chr( int ( hexStr[i:i+2],16 ) ) \

# for i in range(0, len( hexStr ), 2) ] )

bytes = []

hexStr = ''.join( hexStr.split(" ") )

for i in range(0, len(hexStr), 2):

bytes.append( chr( int (hexStr[i:i+2], 16 ) ) )

return ''.join( bytes )

#-------------------------------------------------------------------------------

# USB D- = RXD TTL STICK

# USB D+ = TXD TTL STICK

### POORT INSTELLINGEN

ser = serial.Serial()

ser.port = "/dev/ttyUSB0"

ser.baudrate = 9600

ser.parity=serial.PARITY_NONE

ser.stopbits=serial.STOPBITS_ONE

ser.bytesize=serial.EIGHTBITS

ser.timeout=1

try:

ser.open()

print("Connected to: " + ser.portstr)

except Exception, e:

print "error open serial port: " + str(e)

exit()

while 1:

### METHODE #1

ser.write([0xAA, 0x41])

### METHODE #2

#ser.write(serial.to_bytes([0xAA,0x41]))

### METHODE #3

#ser.write("\xAA\x41")

### METHODE #4

#ser.write(chr(0xAA))

#ser.write(chr(0x41))

### METHODE #5

#msg = bytearray([0xAA, 0x41])

#ser.write(msg)

#data = ser.read(8) ### AANTAL BYTES LEZEN

data = ser.readline() ## HELE LIJN LEZEN

#data = ser.readall() ### ALLES LEZEN

print "SIZE: ", len(data)

print "RAW: " + data

print "HEX1: " + ByteToHex(data)

print "HEX2: " + data.encode('hex')

time.sleep(2)

SIZE:  7
RAW: WAWA
HEX1: 57 41 57 41 00 00 00
HEX2: 57415741000000

SIZE: 7

RAW: WAWA

HEX1: 57 41 57 41 00 00 00

HEX2: 57415741000000

P1 poort slimme meter – Telegram uitlezen met Python

Door Sebastiaan Geplaatst op 2018-04-16 Geplaatst in P1 poort slimme meter, Python Script Tagged with P1 poort, Python, Slimme meter, Telegram, Uitlezen

Er zijn talloze scripts op het internet te vinden om “eenvoudig” telegrammen uit te lezen afkomstig van de P1 poort, maar je stuit al gauw of de diversiteit van de DSMR versie, instellingen en inhooud, hieronder is mijn DSRM 2.x …

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Python Library – pymodbusTCP

Door Sebastiaan Geplaatst op 2018-02-24 Geplaatst in Modbus Software, Python libraries Tagged with bibliotheek, programmeren, pymodbusTCP, Python

Python pymodbusTCP Voor communicatie van Modbus TCP/IP Niet voor Modbus RTU Modbus ASCII Modbus RTU over TCP Installatie:

sudo apt-get update
sudo apt-get install -y python-dev python-pip
sudo pip install -U pymodbusTCP

sudo apt-get update

sudo apt-get install -y python-dev python-pip

sudo pip install -U pymodbusTCP

Installatie voor Python 3:

sudo apt-get update
sudo apt-get install -y python3 python3-dev python-pip
sudo pip3 install -U pymodbusTCP

sudo apt-get update

sudo apt-get install -y python3 python3-dev python-pip

sudo pip3 install -U pymodbusTCP

Mijn voorbeeld:

#!/usr/bin/env python
from pyModbusTCP.client import ModbusClient

client = ModbusClient(host="192.168.0.0", port=502, auto_open=True, auto_close=True, timeout=10)
data = client.read_holding_registers(0, 1)    # FUNCTIE 03 - Lees register 0, 1 lang
print "Waarde register: ", data[0]
client.close()

#!/usr/bin/env python

from pyModbusTCP.client import ModbusClient

client = ModbusClient(host="192.168.0.0", port=502, auto_open=True, auto_close=True, timeout=10)

data = client.read_holding_registers(0, 1) # FUNCTIE 03 - Lees register 0, 1 lang

print "Waarde register: ", data[0]

client.close()

Informatie (ENG): Summary A simple Modbus/TCP library for Python A simple Modbus/TCP client …

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Python Library – pymodbus

Door Sebastiaan Geplaatst op 2017-10-13 Geplaatst in Modbus Software, Python libraries Tagged with bibliotheek, Library, programmeren, pymodbus, Python

Python pymodbus Voor communicatie van Modbus RTU Modbus ASCII Modbus RTU over TCP Niet voor Modbus TCP/IP Installatie:

sudo apt-get update
sudo apt-get install -y python-dev python-pip
sudo pip install -U pymodbus

sudo apt-get update

sudo apt-get install -y python-dev python-pip

sudo pip install -U pymodbus

Installatie voor Python 3:

sudo apt-get update
sudo apt-get install -y python3 python3-dev python-pip
sudo pip3 install -U pymodbus

sudo apt-get update

sudo apt-get install -y python3 python3-dev python-pip

sudo pip3 install -U pymodbus

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Collecting six (from Automat>=0.3.0->twisted>=12.2.0->pymodbus3)

Downloading six-1.11.0-py2.py3-none-any.whl

Collecting attrs (from Automat>=0.3.0->twisted>=12.2.0->pymodbus3)

Downloading attrs-17.4.0-py2.py3-none-any.whl

Installing collected packages: pyserial, incremental, constantly, hyperlink, setuptools, zope.interface, six, attrs, Automat, twisted, pymodbus3

Found existing installation: pyserial 3.2.1

Not uninstalling pyserial at /usr/lib/python3/dist-packages, outside environment /usr

Found existing installation: setuptools 33.1.1

Not uninstalling setuptools at /usr/lib/python3/dist-packages, outside environment /usr

Found existing installation: six 1.10.0

Not uninstalling six at /usr/lib/python3/dist-packages, outside environment /usr

Successfully installed Automat-0.6.0 attrs-17.4.0 constantly-15.1.0 hyperlink-17.3.1 incremental-17.5.0 pymodbus3-1.0.0 pyserial-3.4 setuptools-38.4.0 six-1.11.0 twisted-17.9.0 zope.interface-4.4.3

Informatie (ENG): Summary Pymodbus is a full Modbus protocol implementation using twisted for its asynchronous …

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