Nick Lee nickoala

Log GPSD Outputs and Extract Lat/Lon

$ gpspipe -w             # log to stdout
$ gpspipe -w -o abc.log  # log to a file

To auto-log on startup, insert the following line to the file /etc/rc.local:

Build ORB-SLAM2 on Raspberry Pi 3

Operating system: Ubuntu Mate 16.04

I use Ubuntu Mate instead of the usual Raspbian Jessie mainly because of the gcc version. ORB-SLAM2 requires C++11 support. Raspbian comes with gcc 4.9, which does not handle C++11 by default. That means you have to play around with some compiler flags in ORB-SLAM2's CMakeLists.txt to make it work. In contrast, Ubuntu Mate's gcc 5.4 handles C++11 naturally.

Use Python to:

send a plain text email
send an email with attachment
receive and filter emails according to some criteria

Build CuraEngine on Raspbian or Ubuntu

CuraEngine requires libArcus which requires protobuf. Let's build them in turn.

Make sure python3 is Python 3.4 or higher.

Install utilities used by the build process:

Configure SSH server to allow port forward

Edit /etc/ssh/sshd_config:

AllowTcpForwarding yes
GatewayPorts yes

Restart or reboot.

	""" Raspberry Pi + GPS Car Camera
	Achieved with three threads:

	1. Main thread -
	Start preview and recording.

	2. GPS thread -
	Read GPS location.

	3. Annotate thread -

	""" Raspberry Pi + GPS Car Camera
	Achieved with three threads:

	1. Main thread -
	Start preview and recording.

	2. GPS thread -
	Read GPS location.

	3. Annotate thread -

	""" Raspberry Pi + GPS Car Camera
	Achieved with four threads:

	1. Main thread -
	Continuously capture and display on a pygame screen.
	Let user see what the camera is seeing.
	Check for QUIT event. Allow user to press [X] to exit.

	2. Video-recording thread -
	Record indefinitely.