GHA
Well-Known Member
Came across these today >
https://www.waveshare.com/product/4.2inch-e-paper-module.htm
- Refresh power: 26.4mW(typ.)
- Standby power: <0.017mW
AIS integration & Displays
- Thread starter GregOddity
- Start date
Came across these today >
https://www.waveshare.com/product/4.2inch-e-paper-module.htm
GregOddity
Well-Known Member
Came across these today >
https://www.waveshare.com/product/4.2inch-e-paper-module.htm
Suspect that's the way to go. I've had a little portable box working before with a 4 line LCD displaying COG etc running from an ESP8266 & a lithium 18650 battery, handy singlehanded. Can feel some eInk ebay action coming up!
- Refresh power: 26.4mW(typ.)
- Standby power: <0.017mW
This is just a study for the panels for Oddity and Selkie. Still not finished with it. Signal K being displayed on a small monitor surface mounted.
Of course, there will be changes but this is sort of what I’m thinking.
GHA
Well-Known Member
That looks fantastic! Not sure the best way to get 2 displays from one Pi, might be worth getting a seperate rasp pi zero , don't cost much and power very low. If I could find mine I'd measure it with the new dead handy 1A meter. Been measuring everything else!
And those E ink displays are looking more and more enticing!
Might do a video walkthrough of the Pi onboard today for you to have a look at.
And these are just brilliant! Really worth considering, all your music, web radio, podcasts with very low power draw controlled from any phone/tablet.
https://www.hifiberry.com/shop/boards/hifiberry-amp2/
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GregOddity
Well-Known Member
That looks fantastic! Not sure the best way to get 2 displays from one Pi, might be worth getting a seperate rasp pi zero , don't cost much and power very low. If I could find mine I'd measure it with the new dead handy 1A meter. Been measuring everything else!
And those E ink displays are looking more and more enticing!
Might do a video walkthrough of the Pi onboard today for you to have a look at.
And these are just brilliant! Really worth considering, all your music, web radio, podcasts with very low power draw controlled from any phone/tablet.
https://www.hifiberry.com/shop/boards/hifiberry-amp2/
I see you saw the other panel :encouragement: I do like the e-Ink displays but not yet played with any. I may buy one just to have a look see. I was thinking of having a dedicated Pi for each. I do have the 2 Laptops as well gathering dust. There's plenty of ways to go about this one. I can have 1 laptop dedicated to the onboard systems and the Pi for the Batteries or simply 2 Pi dedicated to different things. But I would like to have it look like a PROPER panel. I am also considering installing steering inside the cabin on Oddity and that would do an amazing instrument panel and control station array.
As you can see, I’m still working on it. A few things will change still. The panel itself will be backlit as to illuminate the wording and logo. There are tons of switches still to install. Fuse panel will be separate from panel.
GHA
Well-Known Member
1 Pi should be plenty to do all the data side and spit everything out over wifi and run opencpn as well, pokey little beasts! For a all singing display separate from the main Pi monitor output it might be easier to have another, maybe a Zero with wifi. Then just 5v , no other wiring required. Suspect you'll find you use a laptop or tablet to look at a signalk dash board much more often the at a screen above the chart table.
For a lot of the sensors I use an esp8266 little wifi microcontroller just as it easier to get the wires to a different place than the Pi, cheap as chips, plans for another couple and get to know the sleep mode so they draw next to nothing. Just played around with a FET transister controlled by an ESP. Getting flippin hot though, must be a heatsink stashed somewhere.
Hopefully build a constant current battery capacity tester available at the click of a mouse, all fingers crossed that could be part of the system so you could do a short constant current load test without turning anything off then overly the graph over the previous ones to see how the batteries are doing. WHich would be just wonderful. 99.99% of cruisers have only 3 states of health for their batteries , New, seems OK so leave the things alone and dead
Regarding power, I've a GPS dongle & AIS engine which combined draw next to nothing so you can leave them on all the time. Main GPS draws about 100mA. All adds up! Handy having the Pi & GPS on constantly at anchor as you can see the track of where you've been & check for small drags. AIS not such a big deal.
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GregOddity
Well-Known Member
1 Pi should be plenty to do all the data side and spit everything out over wifi and run opencpn as well, pokey little beasts! For a all singing display separate from the main Pi monitor output it might be easier to have another, maybe a Zero with wifi. Then just 5v , no other wiring required. Suspect you'll find you use a laptop or tablet to look at a signalk dash board much more often the at a screen above the chart table.
For a lot of the sensors I use an esp8266 little wifi microcontroller just as it easier to get the wires to a different place than the Pi, cheap as chips, plans for another couple and get to know the sleep mode so they draw next to nothing. Just played around with a FET transister controlled by an ESP. Getting flippin hot though, must be a heatsink stashed somewhere.
Hopefully build a constant current battery capacity tester available at the click of a mouse, all fingers crossed that could be part of the system so you could do a short constant current load test without turning anything off then overly the graph over the previous ones to see how the batteries are doing. WHich would be just wonderful. 99.99% of cruisers have only 3 states of health for their batteries , New, seems OK so leave the things alone and dead
Regarding power, I've a GPS dongle & AIS engine which combined draw next to nothing so you can leave them on all the time. Main GPS draws about 100mA. All adds up! Handy having the Pi & GPS on constantly at anchor as you can see the track of where you've been & check for small drags. AIS not such a big deal.
Hehe I know EXATLY where that was just by looking at it. That’s in front of the Conserveira do Sul in Olhao where they used to make some of the best Sardine and Tuna cans in Portugal.
Been there often with my grandpa when I was a kid to unload fish.
I see what you say about using the Laptop to check stuff, true. But then again, the monitoring on the laptop is more of a drain on power then I can have with the Pi and I can always relay the data to the Laptop.
I am indeed tempted to go with the 2 Pi and an always ON monitoring system. The music and films are not much of a thing to me but the wife and Phil do love their music. I’m lazy on that. I normally just YouTube my music. Right now, I’m designing a few things I was commissioned to do, listening to the Pink Floyd the Wall.
I’m thinking of incorporating the Hifiberry for that.
Still seeing if I can break free from an old Furuno Radar and translate it for a modern Display. Just another exercise in futility, I fear.
At the moment I’m just trying to gather my thoughts on what we want / wish and create an image of it so we can then look at the sensors and how to rig it all up. I’m almost “there” but not yet.
I am also tempted to have a dedicated monitor for AIS and OPCN and the other just for the onboard systems.
Like I said.. State of Flux. I want everything to fit on the panel.
vas
Well-Known Member
Came across these today >
https://www.waveshare.com/product/4.2inch-e-paper-module.htm
Suspect that's the way to go. I've had a little portable box working before with a 4 line LCD displaying COG etc running from an ESP8266 & a lithium 18650 battery, handy singlehanded. Can feel some eInk ebay action coming up!
- Refresh power: 26.4mW(typ.)
- Standby power: <0.017mW
4 SEC FULL REFRESH!!!!!!
hello???
don't mind the two grayscale, but 4secs you wont call it fast, will you?
and GHA, get over the power consumption and fit another 100W solar, problem solved
slightly OT, sorry Greg, I'm after a sun readable screen for the f/b to control the stabs, came across this:
http://www.newhavendisplay.com/nhd43rtpshieldn-p-9523.html
[it's for a teensy, not pi btw and got to be touch as well!]
any other suggestions (preferably cheaper!) ?
cheers
V.
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GregOddity
Well-Known Member
That's actually not a bad spec and its way cheaper than the ones I was thinking of. 780 is right at the edge of sun readable displays which start at around 700, for comparison most other displays will have a max of 300 to 400 nits or Can/m2.4 SEC FULL REFRESH!!!!!!
hello???
don't mind the two grayscale, but 4secs you wont call it fast, will you?
and GHA, get over the power consumption and fit another 100W solar, problem solved
slightly OT, sorry Greg, I'm after a sun readable screen for the f/b to control the stabs, came across this:
http://www.newhavendisplay.com/nhd43rtpshieldn-p-9523.html
[it's for a teensy, not pi btw]
any other suggestions (preferably cheaper!) ?
cheers
V.
that’s actually worth investigating better. For what it is and for the price is quite good reading from the specs but as with all thing’s screens. you need to see it to actually be able to judge.
It does look ok spec wise and the price is very interesting.
Displays of that size that I worked with previously were not sun readable. Which is a drag…
The jump from 400 to 700 is where you see all the drama. After that you cannot see a very apparent difference. We had a huge screen for testing on the street in Stoke on Trent that was 500 nits. You could see it at night.
vas
Well-Known Member
true, I'm not so keen on extra high cd/m2 as the screen will be tucked in the f/b hardtop above eye level and surrounded by iroko frames and black hardtop lining, so should be fine.
The interesting thing is that you can get them "locally" from mouser:
https://www.mouser.co.uk/newhavendisplay/
prices are good, and there's a 7inch touch as well (NHD-7.0CTP-CAPE-N) for 74quid. They do 10inch as well but not sun readable.
got burnt last time, so now I'll make sure that my duino and libs all support the display before ordering!
V.
The interesting thing is that you can get them "locally" from mouser:
https://www.mouser.co.uk/newhavendisplay/
prices are good, and there's a 7inch touch as well (NHD-7.0CTP-CAPE-N) for 74quid. They do 10inch as well but not sun readable.
got burnt last time, so now I'll make sure that my duino and libs all support the display before ordering!
V.
Lightwave395
Well-Known Member
Me too, with the £30 Portugese supplied WiFi / Seatalk / NMEA convertor from ebay and my old RC530 as back up
GregOddity
Well-Known Member
Yeah with surface mounted application displays you better always make sure they integrate with the rest of the hardware. I have had a few duds. I'll have to give it a better look as soon as I have a bit. I'm "new" 2 to Pi and Arduino hardware.
I think that the difference of price between a 7" and a 10" is small enough that the decision comes down to the application intended. On a motorboat would perhaps be a moot point as they have much more surface to mount devices, but on a sailboat it's always a question of where in hell to place instruments.
I’ll be posting all I use and where to get it when I’m finished. Ill see if I can get CAD of the panel as well and post it up.
GregOddity
Well-Known Member
It seems as we are going the same way. :encouragement:
GregOddity
Well-Known Member
Getting more settled on what I want to do with it. Ideally the left screen could also run OpenCPN with AIS overlay. of course, the dimensions will have to be corrected on the final draft upon having all the elements that are going to be installed.
GregOddity
Well-Known Member
This is pretty much still a work in progress, On Selkie I'm going to go with the Pi i've decided. I don't have a lot of battery power on her and a minuscle solar panel. I got a set of detph, wind and speed from Nasa. Have not yet decided on the GPS to use as I have a few versions available to use. I do have the VHF...
GregOddity
Well-Known Member
I'm really unsure on that. I feel very tempted to go with the Pi3B+ I will still be recharging the batteries on shore power and I do have the outboard to keep me running on low power draw just in case.
I am thinking of installing 2 motorbike batteries I have just laying around and installing them as reserve power for instruments.
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GHA
Well-Known Member
Probably not much in really between the Pi3 & Pi3B+ .
Of course I have one of each, though the Pi3 is installed as there's a spare should there be a calamity at sea, don't think the operating system installed on the SD card from a Pi3 works in a B+ .
Get a voltage sensor (ads1115) and your in with much more of a chance of having happy batteries
GHA
Well-Known Member
Yes, no problem whatsoever, absolutely fine. Assuming openCPN is on a laptop/tablet. Even for a glance it's probably OK for Opencpn, if it's so busy I need to know more then I'm in the cockpit, hand on tiller looking at the real world, not a technological representation of a small part of it
300W onboard already, no room for more. Could live with less if shadows were possible to get rid of, but not in the real world.and GHA, get over the power consumption and fit another 100W solar, problem solved
As we're talking cruising boats here which might see some mains power once every year or 3 on a liftout then batteries & power consumption quickly become an obsession
Go through everything & keep on top of every little milliAmp leak & you will cycle not as deep every night and stand a better chance of getting fully charged every day. Really bad cases maybe get another year out of the batteries. Maybe, total guess But an area where a bit of obsession is a good thing 
And where openplotter plotting voltage/current draw is gold dust.
GregOddity
Well-Known Member
Probably not much in really between the Pi3 & Pi3B+ .
Of course I have one of each, though the Pi3 is installed as there's a spare should there be a calamity at sea, don't think the operating system installed on the SD card from a Pi3 works in a B+ .
Get a voltage sensor (ads1115) and your in with much more of a chance of having happy batteries
Yeah I’m getting all the sensors I can. The Voltage I’m particularly interested in for Selkie.
Now that's a bit of an Oxymoron then. It can't be a spare in an emergency if you can't use it.
Hope you also have an SD ready for it. :encouragement:
GregOddity
Well-Known Member
Yes, no problem whatsoever, absolutely fine. Assuming openCPN is on a laptop/tablet. Even for a glance it's probably OK for Opencpn, if it's so busy I need to know more then I'm in the cockpit, hand on tiller looking at the real world, not a technological representation of a small part of it
300W onboard already, no room for more. Could live with less if shadows were possible to get rid of, but not in the real world.
As we're talking cruising boats here which might see some mains power once every year or 3 on a liftout then batteries & power consumption quickly become an obsession
I'm quickly becoming obsessed with the power on Selkie as well. So, I know where you’re coming from.
On another note. The pic I’m using on the study for the panel is from an App for apple. Having said that I did a bit of research last night but did not manage to find many gauges and dials for signal k that were as nice looking. I’m surprised. Or did I just not look well enough?
The only Apples in my boat are ones I either put in the oven or eat. First I worked for Commodore Computers second a closed ecosystem with outdated hardware from yesterday sold today with the price of tomorrow, does not meet my minimum requirements.
GHA
Well-Known Member
There's a spare Pi3 stashed away in a ziploc with working SD card, when the B+ came out I just *had* to have one.Now that's a bit of an Oxymoron then. It can't be a spare in an emergency if you can't use it.
I use the Kip sigK app from MXtommy, looks fine for me, but I'm focused on content much more that form. Theere to do a job, if it looks nice as well then so much the better
