Direwrite

E-ink display for Direwolf APRS decoding on Raspberry Pi Zero

Configured to show UTC timestamp, sending station, heard station, symbol, levels, lat/lon, and any comment available.

Requirements

Hardware

Designed for Pi Zero W and Papirus 2" E-ink display. My station uses a Baofeng UV-5R with BTech APRS-K2 cable, feeding the Pi via a Sabrent USB sound card. It's currently configured as an RX-only iGate due to poor performance issues with the UV-5R vox and TX.

Software

All code references to gktnc should be replaced with your home directory. All scrips and instructions assume this repo is cloned into your home directory.

• Direwolf TNC set up for APRS - See https://k5eok.org/2021/01/19/aprs-digipeater-igate-with-direwolf-entry-level/ for a good guide. You must configure daily logging with LOGDIR /home/gktnc/direwolf-logs (where gktnc is replaced with your home directory) in your direwolf.conf file.
• Papirus with Python 3 API - See https://github.com/PiSupply/PaPiRus

#TMUX
sudo apt install tmux

#PANDAS
pip3 install pandas

#OPTIONAL - if get Python error "Importing the numpy c-extensions failed."
sudo apt-get install libatlas-base-dev

Enable execution permissions of scripts

chmod u+x /home/gktnc/Direwrite/direwrite.sh chmod u+x /home/gktnc/Direwrite/kill_dw.sh

Run manually

Run manually with direwolf -t 0 & python3 /home/gktnc/Direwrite/direwrite.py or with sh /home/gktnc/Direwrite/direwrite.sh

May need to kill Direwolf after running manually with ps -ef | grep direwolf | grep -v grep | awk '{print $2}' | xargs kill or with sh /home/gktnc/Direwrite/kill_dw.sh

Set to run automatically on boot

Edit user cron with crontab -e. Add the following entry, updating the script directory as needed: @reboot sleep 30 && /usr/bin/tmux new-session -d -s direwolf /home/gktnc/Direwrite/direwrite.sh

Use tmux attach -t direwolf to view session.

Note: To shutdown the Pi gracefully and preserve the SD card, you should SSH in and perform a manual sudo shutdown -h now