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Python testing
Python testing advice
I recently produced a new python module for interacting with heatmiser thermostats using version 3 of their protocol. I have it setup on github, and have started writing some unit tests to make sure I don’t break it, as it’s now a dependency of the wonderful https://home-assistant.io.
My main concern is that the module currently only works on python3 due to the datatype differences in the…
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Bluetooth on raspi with python
Install service
sudo apt-get install --no-install-recommends bluetooth
Check status
sudo service bluetooth status
Install packages
sudo apt-get install bluetooth bluez-utils
sudo apt-get install python-bluez
My bluetooth was HC-06 (slave only) and connected to Raspi over GPIO.This is a serial to Bluetooth device so we need serial communication on raspi.
Install pyserial - sudo apt-get install python-serial
On raspi the HC-06 bluetooth module wont communicate on usb but uses serial port.It has to be connected to GPIOs on the raspi.
Frequently the program which reads serial data disconnects.So prevent getty from writing to the serial port in /etc/inittab comment
#T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100)
Make sure your raspi connects to the internet via WIFI.
Reboot.
SSH into the raspi.
The python program to be run on the raspi :
import serial import time print "BT example started" usbport = '/dev/ttyAMA0' #confirm your serial tty is AMA0 ser = serial.Serial(usbport,9600,timeout=3) while True: #if (ser.inWaiting()>0): time.sleep(0.01) data = ser.read(1024)#16384) #if(data == "h"): if len(data) > 0: print "got ["+ str(data) +"]"# + line
Run the python program on the raspi
I tried using my android mobile.Download Bluetooth Terminal app on your phone.
Search for bluetooth networks on your phone - you should see HC06 pin would be 1234.Connect to it.
Open the Bluetooth terminal, whatever you type it should be visible in your SSH console via the python program on the raspi.
Python Simple Script for WIZ107SR
Python Simple Script for WIZ107SR
WIZ107SR_SimpleTCPClient.py : https://github.com/embeddist/python_WIZ107SR.git
WIZ107SR
WIZ107SR is a gateway module that converts serial protocol (RS-232) into TCP/IP protocol by using W7100A.
Link WIZ107SR materials – WIZ107SR
SW – Download & Install
python3.2 – python3.2version
pyserial2.7 – pyserial2.7
ConfigTool for WIZ107SR – ConfigTool
Script descriptions – TCPClient
Init. serial port…
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Python Simple Script for WIZ107SR
Python Simple Script for WIZ107SR
WIZ107SR
WIZ107SR is a gateway module that converts serial protocol (RS-232) into TCP/IP protocol by using W7100A.
Link WIZ107SR materials – WIZ107SR
SW – Download & Install
python3.2 – python3.2version
pyserial2.7 – pyserial2.7
ConfigTool for WIZ107SR – ConfigTool
Script descriptions – TCPClient
Init. serial port number and baudrate
serial.Serial("COM1", 57600)
Change to serial commond mode
C…
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PyArdQuad - Arduino-based Quadcopter with Python-based Software Piloting System (using PySide, PySerial, and PyGame)
I have began creating my open-source quadcopter library. It is an Arduino UNO based quadcopter with Python GUI and gaming controller flight system. Check it out!
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pySerialインストール
sudo apt-get install python-serial python3-serial
PySerial communication with Arduino
PySerial is a great Python Library used to access the serial port. I've been playing with this to interface with Arduino.
This is a basic example:
from serial import Serial serial_port = Serial('/dev/tty.usbmodemfd') foo = serial_port.read() serial_port.close()
As you can see, it's pretty simple. The problem appears when you want to write to the serial port. Let's say that we want to send an integer. Due to the fact that PySerial sends the data as ASCII code, the Arduino receives the ASCII representation of the number you send. To get around this you have to pack the integer as a binary.
import struct foo = struct.pack('B', 1) # here you are packing the number 1 as a binary. serial_port.write(foo)
Cheers.
Arduino Python Blink - II
My previous post is about one way communications to Arduino using Python. Now I want to make it two way. Here is the code I loaded my Duemilanove with. void setup() { Serial.begin(9600); } void loop() { char i=Serial.read(); if(i=='Y'){ digitalWrite(13, HIGH); Serial.println("At Your Command, The Lights Are On"); } else if (i=='N') { digitalWrite(13, LOW); Serial.println("At your Command, The Lights Are Off"); } } Just as in my previous post, I accessed Python through the Terminal. I entered the following sequence of commands. > > > import serial > > > se=serial.Serial('/dev/tty.usbserial-A9007RxF',9600) Now we are set to talk to the serial port. > > > se.write('Y') The LED lights up. > > > se.read() 'A' That is what Python's response to that command is. Arduino's buffer contains, "At Your Command, The Lights Are On". However, se.read() picked only the first character. So now I say to Python, > > > se.readline() 't Your Command, The Lights Are On\r\n' The response to se.readline() emptied the buffer completely with the exception of 'A'. There are more exceptions to this. I entered the following commands and obtained the following responses as well. > > > se.write('N') 1 > > > se.write('Y') 1 > > > se.write('N') 1 > > > se.readline() 'At your Command, The Lights Are Off\r\n' > > > se.readline() 'At your Command, The Lights Are Off\r\n' > > > se.readline() 'At Your Command, The Lights Are On\r\n' > > > se.readline() 'At your Command, The Lights Are Off\r\n' > > > Every command generates a serial response and that is stored separately from the responses from other commands. Each readline request will fetch then seperately as can be seem above. So now Arduino and Python can talk to each other.
