From personal_submersibles at psubs.org Mon Nov 1 18:00:30 2021 From: personal_submersibles at psubs.org (Michael Holt via Personal_Submersibles) Date: Mon, 1 Nov 2021 18:00:30 -0400 Subject: [PSUBS-MAILIST] The Naval Institute Press is having its holiday sale. Message-ID: 50% off and free shipping for all books, until December 31. usni.org -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Nov 4 12:56:39 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Thu, 4 Nov 2021 16:56:39 +0000 (UTC) Subject: [PSUBS-MAILIST] DIY CO2 monitors In-Reply-To: References: <1989562032.2983053.1635514969624@mail.yahoo.com> Message-ID: <1355044120.1213275.1636044999116@mail.yahoo.com> Hi Cliff, I was wrong about the Cozir-A CO2 sensor.? I thought the error was 3% full scale but it is 3% of measured reading similar to the Sensirion SCD-30.? The Sensirion still wins with price and lifetime though. -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Nov 4 13:34:32 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Thu, 4 Nov 2021 17:34:32 +0000 (UTC) Subject: [PSUBS-MAILIST] DIY CO2 monitors In-Reply-To: <002e01d7cddb$e1fd6150$a5f823f0$@cfl.rr.com> References: <1989562032.2983053.1635514969624@mail.yahoo.com> <1905515641.3031127.1635521437450@mail.yahoo.com> <04dfdb48-7788-44da-fb8a-8a3d1a4ea787@ohiohills.com> <002e01d7cddb$e1fd6150$a5f823f0$@cfl.rr.com> Message-ID: <16909167.1247475.1636047272550@mail.yahoo.com> A couple of snapshots from my environment sensor operating inside my house.? The first is windows and doors closed, the second is with windows open.? Apparently I have a pretty tight house. Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: CO2-6.png Type: image/png Size: 8804 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: CO2-5.PNG Type: image/png Size: 7454 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Nov 4 15:02:58 2021 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Thu, 4 Nov 2021 19:02:58 +0000 (UTC) Subject: [PSUBS-MAILIST] DIY CO2 monitors In-Reply-To: <16909167.1247475.1636047272550@mail.yahoo.com> References: <1989562032.2983053.1635514969624@mail.yahoo.com> <1905515641.3031127.1635521437450@mail.yahoo.com> <04dfdb48-7788-44da-fb8a-8a3d1a4ea787@ohiohills.com> <002e01d7cddb$e1fd6150$a5f823f0$@cfl.rr.com> <16909167.1247475.1636047272550@mail.yahoo.com> Message-ID: <1695645718.1263219.1636052578341@mail.yahoo.com> Jon,?good idea testing out & familiarising with those important monitors. I intend to do the same.?Alan On Friday, November 5, 2021, 06:36:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: A couple of snapshots from my environment sensor operating inside my house.? The first is windows and doors closed, the second is with windows open.? Apparently I have a pretty tight house. Jon_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Nov 4 18:14:29 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Thu, 4 Nov 2021 22:14:29 +0000 (UTC) Subject: [PSUBS-MAILIST] affordable satellite comms - RockBLOCK References: <520125105.1360098.1636064069375.ref@mail.yahoo.com> Message-ID: <520125105.1360098.1636064069375@mail.yahoo.com> For those times you are drift diving the Gulf Stream and absolutely, positively, have to get a message out.? ?Like, GPS coordinates. https://www.youtube.com/watch?v=NOJ_VtSikAA -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Nov 4 19:59:13 2021 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Thu, 4 Nov 2021 23:59:13 +0000 (UTC) Subject: [PSUBS-MAILIST] DIY CO2 monitors In-Reply-To: <16909167.1247475.1636047272550@mail.yahoo.com> References: <1989562032.2983053.1635514969624@mail.yahoo.com> <1905515641.3031127.1635521437450@mail.yahoo.com> <04dfdb48-7788-44da-fb8a-8a3d1a4ea787@ohiohills.com> <002e01d7cddb$e1fd6150$a5f823f0$@cfl.rr.com> <16909167.1247475.1636047272550@mail.yahoo.com> Message-ID: <1492025323.1392742.1636070353392@mail.yahoo.com> Jon, see?https://www.dhs.wisconsin.gov/chemical/carbondioxide.htm Seems your house CO2 levels are a bit high.? Any headaches and sleepiness?? Cliff On Thursday, November 4, 2021, 12:35:21 PM CDT, Jon Wallace via Personal_Submersibles wrote: A couple of snapshots from my environment sensor operating inside my house.? The first is windows and doors closed, the second is with windows open.? Apparently I have a pretty tight house. Jon_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Nov 4 20:21:38 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Fri, 5 Nov 2021 00:21:38 +0000 (UTC) Subject: [PSUBS-MAILIST] DIY CO2 monitors In-Reply-To: <1492025323.1392742.1636070353392@mail.yahoo.com> References: <1989562032.2983053.1635514969624@mail.yahoo.com> <1905515641.3031127.1635521437450@mail.yahoo.com> <04dfdb48-7788-44da-fb8a-8a3d1a4ea787@ohiohills.com> <002e01d7cddb$e1fd6150$a5f823f0$@cfl.rr.com> <16909167.1247475.1636047272550@mail.yahoo.com> <1492025323.1392742.1636070353392@mail.yahoo.com> Message-ID: <592344959.1402521.1636071698623@mail.yahoo.com> Definitely a bit high, but no adverse effects that I can notice.? Had I not connected up the sensors I would assume everything is normal.? Kind of leads me to think the published levels are on the very-conservative side of the spectrum.? Not that it changes my intended standard operating procedure.? If I hit 3k ppm in the sub I'll be surfacing. Jon On Thursday, November 4, 2021, 08:00:56 PM EDT, Cliff Redus via Personal_Submersibles wrote: Jon, see?https://www.dhs.wisconsin.gov/chemical/carbondioxide.htm Seems your house CO2 levels are a bit high.? Any headaches and sleepiness?? Cliff On Thursday, November 4, 2021, 12:35:21 PM CDT, Jon Wallace via Personal_Submersibles wrote: A couple of snapshots from my environment sensor operating inside my house.? The first is windows and doors closed, the second is with windows open.? Apparently I have a pretty tight house. Jon_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Nov 12 10:52:42 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Fri, 12 Nov 2021 15:52:42 +0000 (UTC) Subject: [PSUBS-MAILIST] GPS integrated into software package References: <1691836729.1099506.1636732362531.ref@mail.yahoo.com> Message-ID: <1691836729.1099506.1636732362531@mail.yahoo.com> FYI, I received a GPS unit from Adafruit yesterday and was able to interface it into my Arduino-type microprocessor package seamlessly.? Like the ONWA model that Cliff tested, this one also outputs data in NMEA sentences over Serial interface.? It provides location, heading, speed, date, and time when on the surface.? Under water I will rely on my compass for general directional awareness. https://www.adafruit.com/product/746 Current sensors are O2, CO2, Cabin Pressure, Cabin Temp, Cabin Humidity, 36 and 12 volt state of charge, HP-Air psi for ballast control, depth, water pressure, and water temperature.? The final major sensor to be integrated will be the CruzPro water depth transducer which outputs in NMEA sentences and should be as seamless as the GPS was. For those interested in such things; performance of the graphics rendering software (Processing) has been less than I anticipated using Raspberry Pi 2 Model B.? On average I'm measuring an 8 hz data refresh rate, which is more than enough for basic life support sensors but can make things like the compass display look a little "choppy" when turning in a tight circle quickly.? The biggest performance buster is graphical rendering of the compass rose which requires a lot of? calculations and image manipulation to display correctly based upon the heading.? This can be alleviated somewhat by simplifying the Rose design and/or displaying a static image of a Rose and overlaying information on top of it, but I found there was a point of diminishing returns in taking this approach and 8hz was the best I could acheive.? Removing the compass rose rendering completely and simply displaying a text box with the heading increases display speed significantly to about 20 hz which easily handles any compass movement without a hint of choppiness. Pi 2 B has 900mhz cpu and 1gb memory.? OS performance is showing 36% cpu utilization, 525gb memory free, and no swap usage.? So the hardware is handling things fine which builds confidence that the bottleneck is the graphical rendering by the? Processing graphical software.? The new Pi 4 is advertising native OpenGL so that may make a difference since Processing uses OpenGL. In any event, since fast tight circles are not a selling point for PSUBS vessels the graphical performance is not likely to have a real world impact in field usage. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: gps.png Type: image/png Size: 330502 bytes Desc: not available URL: From personal_submersibles at psubs.org Fri Nov 12 17:17:48 2021 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Fri, 12 Nov 2021 22:17:48 +0000 (UTC) Subject: [PSUBS-MAILIST] GPS integrated into software package In-Reply-To: <1691836729.1099506.1636732362531@mail.yahoo.com> References: <1691836729.1099506.1636732362531.ref@mail.yahoo.com> <1691836729.1099506.1636732362531@mail.yahoo.com> Message-ID: <470871083.1250402.1636755468453@mail.yahoo.com> Thanks for the update Jon. Good to have options.? Sounds like your HMI and coding to drive it are coming along nicely. Cliff On Friday, November 12, 2021, 09:53:42 AM CST, Jon Wallace via Personal_Submersibles wrote: FYI, I received a GPS unit from Adafruit yesterday and was able to interface it into my Arduino-type microprocessor package seamlessly.? Like the ONWA model that Cliff tested, this one also outputs data in NMEA sentences over Serial interface.? It provides location, heading, speed, date, and time when on the surface.? Under water I will rely on my compass for general directional awareness. https://www.adafruit.com/product/746 Current sensors are O2, CO2, Cabin Pressure, Cabin Temp, Cabin Humidity, 36 and 12 volt state of charge, HP-Air psi for ballast control, depth, water pressure, and water temperature.? The final major sensor to be integrated will be the CruzPro water depth transducer which outputs in NMEA sentences and should be as seamless as the GPS was. For those interested in such things; performance of the graphics rendering software (Processing) has been less than I anticipated using Raspberry Pi 2 Model B.? On average I'm measuring an 8 hz data refresh rate, which is more than enough for basic life support sensors but can make things like the compass display look a little "choppy" when turning in a tight circle quickly.? The biggest performance buster is graphical rendering of the compass rose which requires a lot of? calculations and image manipulation to display correctly based upon the heading.? This can be alleviated somewhat by simplifying the Rose design and/or displaying a static image of a Rose and overlaying information on top of it, but I found there was a point of diminishing returns in taking this approach and 8hz was the best I could acheive.? Removing the compass rose rendering completely and simply displaying a text box with the heading increases display speed significantly to about 20 hz which easily handles any compass movement without a hint of choppiness. Pi 2 B has 900mhz cpu and 1gb memory.? OS performance is showing 36% cpu utilization, 525gb memory free, and no swap usage.? So the hardware is handling things fine which builds confidence that the bottleneck is the graphical rendering by the? Processing graphical software.? The new Pi 4 is advertising native OpenGL so that may make a difference since Processing uses OpenGL. In any event, since fast tight circles are not a selling point for PSUBS vessels the graphical performance is not likely to have a real world impact in field usage. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sat Nov 13 11:50:18 2021 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Sat, 13 Nov 2021 16:50:18 +0000 (UTC) Subject: [PSUBS-MAILIST] GPS integrated into software package In-Reply-To: <470871083.1250402.1636755468453@mail.yahoo.com> References: <1691836729.1099506.1636732362531.ref@mail.yahoo.com> <1691836729.1099506.1636732362531@mail.yahoo.com> <470871083.1250402.1636755468453@mail.yahoo.com> Message-ID: <1875665274.1393356.1636822218278@mail.yahoo.com> Thanks Cliff.? With the addition of the CruzPro depth transducer I will consider this project complete.? When you have time, can you send me the NMEA sentences output by your CruzPro?? It occurs to me that I can get the code in place and tested now without actually needing the device.? When I order it I can just plug it in and presto! On Friday, November 12, 2021, 05:19:40 PM EST, Cliff Redus via Personal_Submersibles wrote: Thanks for the update Jon. Good to have options.? Sounds like your HMI and coding to drive it are coming along nicely. Cliff -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sat Nov 13 12:46:55 2021 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Sat, 13 Nov 2021 17:46:55 +0000 (UTC) Subject: [PSUBS-MAILIST] GPS integrated into software package In-Reply-To: <1875665274.1393356.1636822218278@mail.yahoo.com> References: <1691836729.1099506.1636732362531.ref@mail.yahoo.com> <1691836729.1099506.1636732362531@mail.yahoo.com> <470871083.1250402.1636755468453@mail.yahoo.com> <1875665274.1393356.1636822218278@mail.yahoo.com> Message-ID: <1960314633.1422336.1636825615714@mail.yahoo.com> See attached. On Saturday, November 13, 2021, 10:51:07 AM CST, Jon Wallace via Personal_Submersibles wrote: Thanks Cliff.? With the addition of the CruzPro depth transducer I will consider this project complete.? When you have time, can you send me the NMEA sentences output by your CruzPro?? It occurs to me that I can get the code in place and tested now without actually needing the device.? When I order it I can just plug it in and presto! On Friday, November 12, 2021, 05:19:40 PM EST, Cliff Redus via Personal_Submersibles wrote: Thanks for the update Jon. Good to have options.? Sounds like your HMI and coding to drive it are coming along nicely. Cliff _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ATU120BT NMEA 0183 Strings.pdf Type: application/pdf Size: 333848 bytes Desc: not available URL: From personal_submersibles at psubs.org Sat Nov 13 14:59:28 2021 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Sat, 13 Nov 2021 19:59:28 +0000 (UTC) Subject: [PSUBS-MAILIST] GPS integrated into software package In-Reply-To: <1691836729.1099506.1636732362531@mail.yahoo.com> References: <1691836729.1099506.1636732362531.ref@mail.yahoo.com> <1691836729.1099506.1636732362531@mail.yahoo.com> Message-ID: <1589204088.1452460.1636833568432@mail.yahoo.com> Thanks Jon,?am interested in any update on this.?I have the raspberry Pi B, but haven't usedit for about 2 years.?I do remember using it as a computer &?didn't have any problems with the graphics.?Alan On Saturday, November 13, 2021, 04:54:58 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: FYI, I received a GPS unit from Adafruit yesterday and was able to interface it into my Arduino-type microprocessor package seamlessly.? Like the ONWA model that Cliff tested, this one also outputs data in NMEA sentences over Serial interface.? It provides location, heading, speed, date, and time when on the surface.? Under water I will rely on my compass for general directional awareness. https://www.adafruit.com/product/746 Current sensors are O2, CO2, Cabin Pressure, Cabin Temp, Cabin Humidity, 36 and 12 volt state of charge, HP-Air psi for ballast control, depth, water pressure, and water temperature.? The final major sensor to be integrated will be the CruzPro water depth transducer which outputs in NMEA sentences and should be as seamless as the GPS was. For those interested in such things; performance of the graphics rendering software (Processing) has been less than I anticipated using Raspberry Pi 2 Model B.? On average I'm measuring an 8 hz data refresh rate, which is more than enough for basic life support sensors but can make things like the compass display look a little "choppy" when turning in a tight circle quickly.? The biggest performance buster is graphical rendering of the compass rose which requires a lot of? calculations and image manipulation to display correctly based upon the heading.? This can be alleviated somewhat by simplifying the Rose design and/or displaying a static image of a Rose and overlaying information on top of it, but I found there was a point of diminishing returns in taking this approach and 8hz was the best I could acheive.? Removing the compass rose rendering completely and simply displaying a text box with the heading increases display speed significantly to about 20 hz which easily handles any compass movement without a hint of choppiness. Pi 2 B has 900mhz cpu and 1gb memory.? OS performance is showing 36% cpu utilization, 525gb memory free, and no swap usage.? So the hardware is handling things fine which builds confidence that the bottleneck is the graphical rendering by the? Processing graphical software.? The new Pi 4 is advertising native OpenGL so that may make a difference since Processing uses OpenGL. In any event, since fast tight circles are not a selling point for PSUBS vessels the graphical performance is not likely to have a real world impact in field usage. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: