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# roberto
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Robot
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## Prepare
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sudo systemctl --full --force edit wifi_powersave@.service
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[Unit]
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Description=Set WiFi power save %i
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After=sys-subsystem-net-devices-wlan0.device
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[Service]
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Type=oneshot
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RemainAfterExit=yes
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ExecStart=/sbin/iw dev wlan0 set power_save %i
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[Install]
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WantedBy=sys-subsystem-net-devices-wlan0.device
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rpi ~$ sudo systemctl disable wifi_powersave@on.service
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rpi ~$ sudo systemctl enable wifi_powersave@off.service
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## Test certificate
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openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes -subj '/CN=localhost'
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## Camera test
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raspivid -a 12 -t 0 -w 1280 -h 720 -vf -ih -fps 30 -l -o tcp://0.0.0.0:5000
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mplayer -x 1280 -y 720 -geometry 0:0 -fps 200 -demuxer h264es -noborder ffmpeg://tcp://172.16.85.221:5000
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sudo apt install gstreamer1.0-tools
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Sender (Pi): gst-launch-1.0 -e v4l2src do-timestamp=true ! video/x-h264,width=640,height=480,framerate=30/1 ! h264parse ! rtph264pay config-interval=1 ! gdppay ! udpsink host=192.168.178.20 port=5000
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Receiver: gst-launch-1.0 -v udpsrc port=5000 ! gdpdepay ! rtph264depay ! avdec_h264 ! fpsdisplaysink sync=false text-overlay=false
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