DanB

Is there a good general charge/batteries faq about?

What do folks recommend as a good way to monitor leisure power levels & usage? My boat doesn't have any sort of "fuel gauge" for the remaining power in the leisure batteries (4x 12v).

This is my mount for the zero in the cratch/bow.. works nicely. https://thepihut.com/products/zeroview Cruising I'll use one of those portable battery bank/phone chargers with USB output as the power source.. I have a 5000 milliamp one that easily lasts multiple days powering the pi.

Pennine: there is already a way that works, it just annoys me a bit because I don't want the cable. I can handle ~30ms latency from using wireless, but 2-3 seconds caused by encoding and establishing stream buffers is too much to bear! Here's the working/wires/ugly way: Raspberry pi + camera at front of boat HDMI ->rj45 (ethernet cable) adaptor cable to back of boat rj45->HDMI HDMI to screen on back of boat (include some kind of "Screen doesn't go blank" settings) run "raspistill" with preview mode output to HDMI. little or no visible lag, 4k output You can get an ethernet-friendly stream to tablet or smartphone but with a 2-3 second delay caused by encode/decode this way: This is my pi-zero + camera script: # cat stream #!/bin/bash /usr/bin/sudo modprobe bcm2835-v4l2 /usr/bin/sudo -u pi /usr/bin/cvlc v4l2:///dev/video0 --no-audio --v4l2-width 1280 --v4l2-height 760 --v4l2-chroma h264 --sout '#standard{access=http,mux=ts,dst=0.0.0.0:12345}' Client/tablet etc: open.. network stream.. http://IP_OF_YOUR_PI:12345 I sit the ipad on the kitchen table and use this as my "window" sometimes just on internal network

For timelapses.. # this is the capture cronjob @reboot sleep 60; /usr/bin/raspistill -w 1600 -h 1200 -q 60 -tl 4000 -t 0 -o /tl/img_\%04d.jpg # the encoder doesn't like gaps, so if there are any missing captures I make sure to rename all # the files with a perl script so they go 0001.jpg, 0002,jpg, 0003,jpg, etc with no gaps # this is the encoder script avconv -f image2 -r 25 -i img_%04d.jpg -c:v libx264 -pix_fmt yuv420p /output.mp4 I used to run the encoder on a pi3- now I use an asus tinkerboard.. *basically* the same as a pi at more than double the speed. Here's a sample.. Victoria park to Islington/Angel, by way of 2 cheeky runs through the tunnel. Time-lapse also makes it look like I hit things sometimes- that's just me stopping, reversing, etc to make this 70' beast go around some of the tighter bends without thrusters timelapse.mp4

I'm running a time-lapse camera on the front of the boat with a pi zero/w.. and combining into the day's video with a pi3. I also combine the cameras (a couple separate ones) with a virtual linux host at ovh.com so I can trigger photos and streaming video. To-do list -low-latency Bow camera to screen at stern to use to see what's going on 70' ahead in real time - adding GPS coordinates + a map overlay to the time-lapse view - replace nest thermostat with pi zero - ultrasonic sensors as "am I about to hit that" alarms