X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02.git/blobdiff_plain/170f63baf5a56d9ece11b31924a9f4a81cd92812..0c09c57b1c539bd9299072b897c4af534d6b9a6b:/doc/location/README.org?ds=inline diff --git a/doc/location/README.org b/doc/location/README.org index d626dd0..d45fdae 100644 --- a/doc/location/README.org +++ b/doc/location/README.org @@ -1,7 +1,12 @@ * Location Logging +#+TITLE: Ninfacyzga-01 Manual +#+AUTHOR: Steven Baltakatei Sandoval +#+EMAIL: baltakatei@gmail.com +** About This document was created by Steven Baltakatei Sandoval on -<2020-06-29 Mon 12:14> under a [[https://creativecommons.org/licenses/by-sa/4.0/][Creative Commons BY-SA 4.0 license]]. It -was updated by Steven Baltakatei Sandoval on <2020-06-29 Mon 16:05>. +~2020-06-29T12:14Z~ under a [[https://creativecommons.org/licenses/by-sa/4.0/][Creative Commons BY-SA 4.0 license]]. It was +updated by Steven Baltakatei Sandoval on ~2020-10-18T00:13Z~ + ** Narrative Ninfacyzga-01 records (logs) its position in time and space using a [[https://en.wikipedia.org/wiki/Satellite_navigation_device][GPS receiver]]. The NMEA location data produced by the receiver is @@ -17,21 +22,21 @@ See the [[https://www.raspberrypi.org/pi-zero-w/][OEM]] webpage for this product **** PiZ UpTime 2.0 See the [[https://alchemy-power.com/piz-uptime-2-0/][OEM]] webpage for this product. *** Software -~bkgpslog~ : The bash script that performs the location data -collection and processing. Is an executable file contained within this -repository at ~exec/bkgpslog~. It should be copied to -~$HOME/.local/bin~. +~bklog~ : A bash script that saves its stdin stream to a tar file. The +file may be compressed by ~gzip~ and encrypted by ~age~. It is an +executable file contained within this repository at ~exec/bklog~. It +should be copied to ~$HOME/.local/bin~. -~gpsd~ : A background daemon app capable of interfacing with the -Ozzmaker BerryGPS-IMU's GPS submodule. Installed and initialized by -~apt~. +[[https://tracker.debian.org/pkg/gpsd][~gpsd~]] : A background daemon app capable of interfacing with the +[[https://ozzmaker.com/berrygps-berrygps-imu-quick-start-guide/][Ozzmaker BerryGPS-IMU]]'s GPS submodule. Installed and initialized by +~apt~. Should be installed along with the ~gpsd-clients~ package. ~gpspipe~ : A command line app that polls ~gpsd~ and produces a stream stdout consisting of GPS data lines in NMEA format. Installed via ~apt~. ~gpsbabel~ : A command line app that converts GPS data from one format -into another. ~bkgpslog~ uses it to convert NMEA data into GPX and +into another. ~bklog~ may be used to convert NMEA data into GPX and KML. Installed via ~apt~. ~gzip~ : A simple command line app that compresses stdin into a @@ -43,27 +48,210 @@ executable file contained within this repository at ~exec/age~. It should be copied to ~$HOME/.local/bin~. **** Narrative -~bkgpslog~ populates a 60-second buffer with NMEA data from ~gpsd~ via -~gpspipe~. This buffer is used by ~gpsbabel~ to produce GPX and KML -versions of the buffer. All 3 buffers are then comprssed with ~gzip~, -encrypted with ~age~, and then written to disk. +~bklog~ may be used to log location data by receiving stdout produced +by ~gpspipe~. ~bklog~ contains options that allow file writes to be +performed at adjustable time intervals (default: 300 seconds), +compressed (with ~gzip~), and encrypted (with ~age~). Files are +written in the form of appendages to a ~tar~ archive saved to a +specified location. The NMEA data produced by ~gpspipe~ may be +processed via a ~gpsbabel~ command string specified as an option to +~bklog~, assuming ~gpsbabel~ is installed. *** Output + +Several output file formats have been tested with ~bklog~. + **** File Formats ***** NMEA -See the [[https://en.wikipedia.org/wiki/NMEA_0183][Wikipedia page]] for this. +~NMEA~ is an acronym for National marine Electronics Association. The +NMEA format described in this document follows the NMEA 0183 +standard. It is a newline-delimited streaming text format that encodes +global positioning system (GPS) data such as WGS84 location, time and +date information, satellite count, accuracy, and other +information. Each line is an "NMEA sentence". Descriptions of various +NMEA sentences can be found on [[http://aprs.gids.nl/nmea/][this]] webpage. + +See the [[https://en.wikipedia.org/wiki/NMEA_0183][Wikipedia page for NMEA 0183]] for this. This file format is the +default output of the ~gpspipe -r~ command. ***** GPX -See the [[https://en.wikipedia.org/wiki/GPS_Exchange_Format][Wikipedia page]] for this. +See the [[https://en.wikipedia.org/wiki/GPS_Exchange_Format][Wikipedia page]] for this. [[http://wiki.gis.com/wiki/index.php/WGS84][WGS84]] is the datum used. An NMEA file +may be converted to this format using ~gpsbabel~. ***** KML -See the [[https://en.wikipedia.org/wiki/Keyhole_Markup_Language][Wikipedia page]] for this. +See the [[https://en.wikipedia.org/wiki/Keyhole_Markup_Language][Wikipedia page]] for this. [[http://wiki.gis.com/wiki/index.php/WGS84][WGS84]] is the datum used. An NMEA file +may be converted to this format using ~gpsbabel~. + **** Encryption Method -Files produced by the bkgpslog script are encrypted against a set of -public keys using [[https://github.com/FiloSottile/age][age]]. The public keys are bech32 strings supplied as -options to bkgpslog when called. +See [[file:../setup/README.org][Main Setup]] procedures. + ** Operating Procedures *** Initial Startup +See OEM (Ozzmaker) [[https://ozzmaker.com/berrygps-berrygps-imu-quick-start-guide/][quickstart guide for the BerryGPS-IMU]]. +**** Physical Setup + +BerryGPS-IMU must be electrically connected to the correct pins on the +GPIO header of a Raspberry Pi Zero W. + +*Optional*: stack together with PiZ Uptime 2.0 module. No GPIO pins +conflict so a simple stacking and soldering with long header pins is +possible. + +**** Software Setup +***** Install Executables +Follow the [[file:../setup/README.org][Main Setup]] procedures to obtain required files from this +repository. + +Install ~gpsd~, ~gpsd-clients~, and ~gpsbabel~. + +: $ sudo apt install gpsd gpsd-clients gpsbabel + +***** Setup Serial for BerryGPS +The Ozzmaker BerryGPS-IMU unit requires that the serial console be +disabled and the serial port enabled. (see [[https://ozzmaker.com/berrygps-setup-guide-raspberry-pi/][ref]]). + +: $ sudo raspi-config + +Navigate to ~5 Interfacing Options~, then ~P6 Serial~. + +When prompted "Would you like a login shell to be accessible over +serial?", answer ~No~. + +When prompted "Would you like the serial port hardware to be +enabled?", answer ~Yes~. + +***** Setup ~gpsd~ +~gpsd~ needs to know which serial port to look at for NMEA location +data generated by the GPS unit. This can be done by modifying the +~gpsd~ configuration file at ~/etc/default/gpsd~. + +: sudo nano /etc/default/gpsd + +Make sure the following lines are present: + +#+BEGIN_EXAMPLE +START_DAEMON="true" +USBAUTO="false" +DEVICES="/dev/ttyAMA0" +GPSD_OPTIONS="-n" +#+END_EXAMPLE + +NOTE: The ~DEVICES=~ line must be adjusted if the the ~ninfacyzga~ +device is configured to also track time. (See [[file:../time/README.org::*Setup%20~gpsd~][ref]]). + +NOTE: The ~-n~ option causes ~gpsd~ to begin polling GPS devices +without waiting for a client to connect. This is important if ~gpsd~ +provides data to other applications (ex: ~gpspipe~, ~chrony~). + +Enable ~gpsd~ to run automatically via: + +: $ sudo systemctl enable gpsd + +Restart ~gpsd~ via: + +: $ sudo systemctl restart gpsd + +Run ~gpsmon~ to verify that location data is being recorded. + +: $ gpsmon + +***** Automatic Start Configuration +It is recommended to create a daily ~cron~ job that executes a bash +script that starts ~bklog~ jobs to record location along with other +types of data recording. An example of such a script is below: + +#+BEGIN_EXAMPLE +#!/bin/bash + +# Log location +gpspipe -r | /bin/bash "$HOME/.local/bin/bklog" -c -e -z "UTC" -t "/dev/shm" \ + -r age1kza7pfshy7xwygf9349zgmk7x53mquvedgw9r98qwyyqhssh830qqjzlsw \ + -r age1ce3pvzrqfcn2pc6zqzglc8ac8yjk3fzukpy08cesqjjwns53xywqmaq7xw \ + -R "$HOME/.config/bklog/recipients" -w ".nmea" -b "300" -B "day" \ + -o "$HOME/Sync/Evanescent_Location" -l "location" \ + -p "gpsbabel -i nmea -f - -o gpx -F - " ".gpx" \ + -p "gpsbabel -i nmea -f - -o kml -F - " ".kml" & +# Log pressure +python ~/.local/bin/bmp388.py | /bin/bash "$HOME/git-OC/ninfacyzga-01/exec/bklog" \ + -c -e -z "UTC" -t "/dev/shm" \ + -r age1kza7pfshy7xwygf9349zgmk7x53mquvedgw9r98qwyyqhssh830qqjzlsw \ + -r age1ce3pvzrqfcn2pc6zqzglc8ac8yjk3fzukpy08cesqjjwns53xywqmaq7xw \ + -R "$HOME/.config/bklog/recipients" -w ".txt" -b "300" -B "day" \ + -o "$HOME/Sync/Evanescent_Location" -l "pressure" & +#+END_EXAMPLE + +This script, if it were saved at +~"$HOME/.local/bin/cron/dailylog.sh"~ would then be added as a +line in the ~crontab~ file as shown below: + +#+BEGIN_EXAMPLE +$ crontab -e +0 0 * * * /bin/bash ~/.local/bin/cron/dailylog.sh +@reboot /bin/bash ~/.local/bin/cron/dailylog.sh +#+END_EXAMPLE + +In the example script, the options are: + +: -c : tells bklog to compress output +: -e : tells bklog log to encrypt output +: -r : tells bklog to interpret the next argument as a pubkey string +: -R : tells bklog to interpret the next argument as a directory +: where public keys may be found (first line of each file is +: read). +: -o : tells bklog to write output files to the directory represented +: -t : tells bklog to interpret the next argument as a directory +: for storing temporary files +: by the next argument +: -p : tells bklog a command string through which output is piped +: before being compressed and encrypted. Also expected is a +: file extension to be appended before the compression and +: encryption file extensions. +: -w : tells bklog to save the unprocessed stdin with a specified +: file extension (instead of the default '.stdin'). +: -b : tells bklog how long each buffer round (time between file +: writes) lasts in seconds. +: -B : specifies the time-to-live for the bklog script. A valid value may +: one of the time elements such as "day" or "hour". +: -l : specfies a custom string to be used in output file names to +: help differentiate tar files produced via bklog from different +: sources of data. +: -z : specifies a time zone to be used to determine the script time-to-live. +: By default, bklog uses whatever time is specified by the TZ +: environment variable. + +***** Log Transfer Configuration +See [[file:../setup/README.org][Main Setup]] procedures. + +Log files may be shared to other machines via ~syncthing~. See [[https://docs.syncthing.net/][this]] +manual for how to set up a shared folder and add Ninfacyzga-01 as a +device. Syncthing's directory synchronization capability allows a +remote machine to delete files from Ninfacyzga-01 by deleting from the +shared folder that they both share. + +When log files are removed from Ninfacyzga-01 is not within the scope +of this document. + +***** Key Generation +See [[file:../setup/README.org][Main Setup]] procedures. + *** Normal Startup +Turn on Ninfacyzga-01 by supplying 5VDC power to the Raspberry Pi. No +further interaction should be required. +*** Normal Operation +No interaction beyond continually supplying approximately 100mA of +5VDC power and occasionally removing log files to conserve disk space +is required. +**** Log Transfer +Log files may be transferred by use of ~syncthing~ shared folders. +**** Automatic Updates +The ~automatic-upgrades~ package, if installed, should automatically +install security patches to packages installed via ~apt~. *** Normal Shutdown +The system may be shutdown via SSH by running: + +: $ sudo shutdown -r 0 + *** Unscheduled Shutdown +Ninfacyzga-01 as described and setup should tolerate unscheduled power +loss. Log files being written every 60 seconds means, at most, 60 +seconds worth of location data may be lost. *** End of Life Disposal - +See [[file:../setup/README.org][Main Setup]] procedures.