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Latest Threads
5V power supplies RPI4
Forum: General discussion
Last Post: ddelorme
9 hours ago
» Replies: 4
» Views: 15
MPU9250 / PyPilot: values...
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MPU9250 heading is slowly...
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9 hours ago
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I2C won't run
Forum: How do I...?
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11 hours ago
» Replies: 5
» Views: 17
[OP2] Latest beta does no...
Forum: Bug Reports
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11 hours ago
» Replies: 9
» Views: 19
PyPilot works for me!
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Last Post: seandepagnier
11 hours ago
» Replies: 6
» Views: 25
new case for my pi4 Need ...
Forum: How do I...?
Last Post: ddelorme
Yesterday, 10:10 AM
» Replies: 5
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New Member - new OP syst...
Forum: General discussion
Last Post: mgrouch
01-22-2020, 06:55 PM
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Moitessier HAT 2 roadmap
Forum: General discussion
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01-22-2020, 03:41 PM
» Replies: 44
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Signalk serial ports and ...
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01-22-2020, 10:25 AM
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  5V power supplies RPI4
Posted by: ddelorme - Yesterday, 02:48 PM - Forum: General discussion - Replies (4)

I am trying to stabilize my power for a RPI4 OP2 build.
I was using a LM2596  buck converter 3 amps max but I was getting the the low power warning.
I had to up the voltage to about 5.35 volts then no warnings?
I switched to a XL4015 rated for 5 amps max but I have the same issue. This has to be hard on the voltage regulator on the RPI?
Or is my meter bad?
 I am only drawing .54 amps @12 volts and that includes my USB Hub that has its own power. The Pi is drawing less then 1 amp @5 volts this is well within the range of both Buck converters.

Only the powered hub is plugged into the USB and i have the IMU and BME so power draw is at a minimum.
The connection to my 5v pin is though a proto-hat the wire is 20 gage and about 2" long round trip.

Any Ideas?

  I2C won't run
Posted by: Lazzz - 01-22-2020, 10:02 PM - Forum: How do I...? - Replies (5)

I cannot open the I2C app 2.0.6-beta on Pi4

I click on it & all that happens is the hourglass appears on my cursor for 30 seconds or so & then stops.

I have uninstalled & reinstalled & still will not run.

What do i use the "Change Log" tab for in the settings app??

Also my Pi4 will not reboot, if I click on Reboot it will shut down but I have to turn off the power then back on & it will start again.

Any ideas!!

Can't wait for the documentation - what's there so far is excellent!! Smile

  [OP2] Latest beta does not boot on RPI3+ with Moitessier HAT 1
Posted by: emilecantin - 01-22-2020, 03:28 PM - Forum: Bug Reports - Replies (9)


I've tried the latest V2 beta (2020-01-13), Moitessier version on my existing OpenPlotter hardware, a Raspberry Pi 3+ with a Moitessier HAT version 1 mounted on it.

My existing V1 SD card works without any issue, but I've tried V2 on 2 different SD cards, NOOBS and IMG versions, and I always get the same issue:

  1. The Pi starts booting, with the multi-color screen.
  2. Then I get the Raspbian splash screen (white with a raspberry in the center), and I see a few services starting in the bottom left. (I'm really not sure, but I think the last one I see starting is openplotter.service)
  3. Then the screen turns blank, and the green LED on the Pi flashes a few times and turns off.
I believe this might be a bug, just let me know if you want me to try specific actions. My next step is to try the non-moitessier version.

  New Member - new OP system
Posted by: MIAMIPROAS - 01-22-2020, 12:28 PM - Forum: General discussion - Replies (4)

Greetings from what is usually Warm Miami - today started at 39F and may reach 62F Huh
I am new to the Raspberry Pi and Open Plotter, and my  Garmin GPS plotter's screen burned - so a good opportunity to replace it.

I want to connect: Depthfinder (Raymarine i40), Wind Instrument (Raymarine ST60), Tillerpilot (Raymarine ST1000+). I also want to be able to monitor bilge water level in each hull.Maybe connect other instruments later on. I also plan to connect to an iPadmini and maybe a laptop to display. As my elder small catamaran is spartan, I want to minimize amp usage.

My question is whether I should buy the Rp3iB+ or buy the 4? I am planning to buy the Moitissier hat in order to get GPS and AIS read. I understand Openplotter is stable with Rpi3, I am not sure if it is with Rpi4, not sure if Motissier is compatible with Rpi4? How about buying a case?

Also, I have read that I need to buy additional cables to connect the instruments as they are NMEA0183 - looking for examples or brands.
additional question is in reference to power supply to the Rpi - understand is better to have a self-powered USB hub and also buy a beefier power supply for the Rpi - looking for examples.

One last question - since buying from Miami - can I get the Motissuer hat from the US?


  Canbus reception NMEA2K GPS to SignalK
Posted by: verkerkbr - 01-21-2020, 05:04 PM - Forum: General discussion - Replies (1)

Today I received a Garmin NMEA2000 GPS.

Connected this to my NMEA2000 network setup with the Canable canbus board.

Used the canbus settings in OpenPlotter 2.0 with SignalK server 1.20. Did not work.

After sending the activation string for the Candlelight firmware of the Canable, the NMEA2000 conversion to SignalK worked.

And now with the OpenCPN version with direct input of SignalK it works great.



  Some schematic questions
Posted by: CapnKernel - 01-20-2020, 09:01 AM - Forum: General discussion - Replies (4)

I'm looking at the schematics here, and I have some questions:

  • What is the purpose of R1 (100R) between +12V and the nano's VIN?  (Getting 5V from the nano is a clever trick)

  • What is the purpose of U3 (BAS4002A)?  

  • How is power fed to the RPi?  (I can't see it on this schematic - is it via the USB port, or perhaps via pin 2 or 4 (5V)?)

  • If powered by 12V, the schematic says there should be a diode between J5 pins 2 and 3.  Does +12V need to be regulated, or is Vcc - Vf ok?  (For example, what if Pwr+ is 14.4V?)  And will the energy and/or voltage lost across the diode be worth worrying about?
  • I'm guessing PWMCL is the clutch control.  Is PWMCL connected to anything?

  • Is there currently support for a buzzer to signal errors, or that a waypoint has been reached?
Any pointers appreciated.

  Does openCPN get AIS from the internet or just SDR?
Posted by: Techstyle - 01-20-2020, 01:50 AM - Forum: How do I...? - Replies (6)

I installed an RTL-SDR USB and have connected a an antenna, but the one that came with it - not a marine VHF antenna.

In OpenCPN I can see a couple of base stations, one 7.3NM away and 16.1 NM away.

I don’t think these were on the map previously but my question is - Does OpenCPN (ver 4.8.4) use the Internet and the SDR for AIS info?

I know there are a few boats closer than those base stations but I cannot see them. The two base stations are both south of me and the boats are north. It is pretty built up to the north of me

Pi ver 3B, OP ver 1.0.0 alpha

  Pypilot update - new user
Posted by: Hpeer - 01-19-2020, 01:59 PM - Forum: General discussion - Replies (2)

PI have a PyPilot from Sean. Pi zero wh.  It works fine.  I want to update with the new image.  The instructions say to make a copy of the PyPilot.conf file and reinsert that in the new image.  That’s where I am stuck.  

I have new 16g Micro SD cards
I have formatted the SD card on a windows laptop with SD FORMATTER.
I downloaded the image to the Win laptop and unzipped it with 7 Zip
I flashed it to the SD card with ETCHER

I have a second laptop with Navigatrix, running on some Unix build.
I put the SD card in there and can see the file format

However I can NOT find the PyPilot.conf file, nor a tc folder

I put the old SD card in and see the (generally) same file structure but can not find the PyPilot.conf file there either.

I have downloaded PuTTy and have successfully logged onto pypilot.  
I’m a complete neophyte with Python but fans cd and ls.
However I can’t find the “.pypilot.conf” time

So some advice would be appreciated.

  SignalK server update to 1.20
Posted by: verkerkbr - 01-19-2020, 05:10 AM - Forum: General discussion - Replies (2)

The SignalK server updated to the latest 1.20 version. Worked within the server on my Linux 64 AMD. But on my RPI and 386 Linux system it shows an error.

.Re-install the SignalK server with the OpenPlotter menu worked. But all the settings are lost.

Now running SignalK server version 1.20 on all the 3 systems. Works well and faster.

Direct input of SignalK in OpenCPN is also a step forward.


  How I’m going to....
Posted by: Techstyle - 01-18-2020, 12:56 AM - Forum: How I did it - No Replies

I recently bought a 1996 Hunter H336 that came with ST50 Depth and Speed instruments, ST4000+ Auto pilot, ST60+ Wind instrument, and a Garmin GPSMap 2010C all in the cock pit and a tube screen based vintage Navcenter 500 and a Old Radar system in the Nav Station. I plan to add the Open plotter Pi in the Nav station connected up like in the picture.

[Image: 074646c93417f0b5dbd1f6dfe6d65055.jpg]

I may connect the Pi into the nmea bus that comes back out of the Garmin so that I do not have to power up the older nav station based Radar and GPS.

Does open plotter share way points on the NMEA bus? Would AIS information be available on the NMEA bus? Would radar data be available to open plotter?