twisted.positioning: geolocation in Twisted
I'm using twisted.internet.serialport to have my program be continuously connected to a device on a serial port. Unfortunately my serial port is just a usb device, which means it can be disconnected or reset by the OS at any time (port 2 disabled by hub (EMI?), re-enabling.I see that pyserial has support for this for a few weeks and raises a SerialException. This tells you that Python found the serial module in your personal desktop directory. Import serial is now running code you wrote. Based on the previous surmise, this is likely a bad thing.
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.
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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.