TWISTED event driven framework in python particular focus on. SERIAL PORT from twisted.internet.serialport import SerialPort from. I cannot seem to get this code to listen to that same serial port though.:/ I have been working on this for a bit over a month and seem to be stuck. I just cannot seem to find a good example for Twisted Python online to receive serial data; or at least an example that I understand. Anyway here is what I have so far.

This demo shows how to hook up an Arduino to a WAMP router and display real-time sensor readings in a browser, as well as control the Arduino from the browser.

To give you an idea, here are some videos:

How it works

The serial2ws program will open a serial port connection with your Arduino. It will communicate over a simple, ASCII based protocol with your device.

Control

The serial2ws program exposes a WAMP procedure com.myapp.mcu.control_led which can be called remotely via WAMP. When the procedure is called, serial2py forwards the control command to the Arduino over serial. Turning on and off the LED is done by sending a 0 or 1 character over serial.

Sense

The Arduino will send sensor analog values by sending ASCII lines over serial consisting of the sensor ID (int) and sensor value (int) delimited by whitespace (a tab character). The serial2ws will receive those lines, parse each line, and then publish WAMP events with the payload consisting of the sensor values to the topic com.myapp.mcu.on_analog_value.

How to run

You will need to have the following installed onn the host that connects over serial to your Arduino.

• Python
• Twisted
• AutobahnPython
• PySerial

When using the Arduino Yun, this stuff runs on the little Linux computer that resides on the Yun. When using the Arduino Mega, this stuff runs on a computer to which you connect the Mega via serial.

Upload the serial2ws.ino sketch to your Arduino.

Connect your serial device and run

Open

in your browser.

The serial2ws program has a number of command line options for setting COM port, baudrate etc.Run python serial2ws.py --help to get information on those.

Examples

Arduino Yun running an embedded Web server and WAMP router:

Arduino Yun running disabling the embedded Web server and connecting to an uplink WAMP router:

twisted.positioning: geolocation in Twisted

Introduction¶

twisted.positioning is a package for doing geospatial positioning (trying to find where you are on Earth) using Twisted.

High-level overview¶

In twisted.positioning, you write an IPositioningReceiver implementation that will get called whenever some information about your position is known (such as position, altitude, heading..).The package provides a base class, BasePositioningReceiver you might want to use that implements all of the receiver methods as stubs.

Ethernet stuck on identifying windows 10. Secondly, you will want a positioning source, which will call your IPositioningReceiver.Currently, twisted.positioning provides an NMEA implementation, which is a standard protocol spoken by many positioning devices, usually over a serial port.

Examples¶

• Connects to an NMEA device on a serial port, and reports whenever it receives a position.