EnviroDIY | Marion | Activity https://www.envirodiy.org/members/mwag1verizon-net/activity/ Activity feed for Marion. Tue, 28 Apr 2026 21:25:24 -0400 https://buddypress.org/?v= en-US 30 hourly 2 0dd697bf2b9e576340aa7733a9558bec Marion posted a new activity comment https://www.envirodiy.org/activity/p/4636/#acomment-4645 Thu, 09 Jan 2020 13:05:24 -0500 Sara: <My responses re your comments:

a. The fluoropolymer grease used was Krytox. It is very expensive, but a very small amount is required to coat a sensor face. The advantage vs normal hydrocarbon based greases (such as Vaseline) is that this polymer is very resistant to oxidation and/ or evaporation of volatile components which leads to…[Read more]

In reply to - Marion replied to the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger We just finished the last of a series of tests of the Maxbotix. With the changes which Sara suggested (close […] ]]> 57daf5d5cb0edc26d051289b7d92f1d8 Marion replied to the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger https://www.envirodiy.org/topic/sleep-code-not-working-with-maxbotix-7389/#post-13553 Wed, 08 Jan 2020 18:37:05 -0500 We just finished the last of a series of tests of the Maxbotix. With the changes which Sara suggested (close the serial port after each log interval and restart it for each new consectutive interval), the sleep code does work if the sensor is continuously powered.

Setup: Maxbotix 7389 sensor with the target either stream water or a fixed/flat…[Read more]

]]> aa903031fbfb5e5286a465b0a092a518 Marion posted a new activity comment https://www.envirodiy.org/activity/p/4587/#acomment-4589 Mon, 23 Dec 2019 22:09:38 -0500 We have not tested that part of the data collection yet. Instead, we are first testing the approach in your suggestion as to powering up the sensor then opening the serial port, taking fresh reading, and then closing the serial port resulting in dumping all old data from the buffer. There is evidence in our previous data to support your idea…[Read more]

In reply to - Sara Damiano replied to the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger Did the modification I suggested get your board to go back to sleep and stay asleep? ]]> 03de3a3ab84084700b9fe2709c2763d0 Marion replied to the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger https://www.envirodiy.org/topic/sleep-code-not-working-with-maxbotix-7389/#post-13453 Mon, 09 Dec 2019 20:12:52 -0500 #include <SoftwareSerial_PCINT12.h>

#include <Sodaq_PcInt_PCINT0.h>

//sketch to log sonar data on Mayfly
//this one uses either board power or a battery pack to continuously power Maxbotix
#include <Wire.h>
#include <avr/sleep.h>
#include <avr/wdt.h>

#include <SPI.h>
#include <SdFat.h>
SdFat SD;

#include <RTCTimer.h>
#include…[Read more]

]]> c165dd10ef67e1b6dc98b52cac769d8d Marion replied to the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger https://www.envirodiy.org/topic/sleep-code-not-working-with-maxbotix-7389/#post-13452 Mon, 09 Dec 2019 20:12:07 -0500 Sensor works much better in open air suspended over water on a boom. We are now testing taking 10 separate reads at each time interval- for trouble shooting information. Although occasional intervals give 300 for all 10 reads, most of the time bad data occurs in only the first 2 or 3 reads at any interval. We are seeing intervals with some bad…[Read more]

]]> bfa5eae2a41b742d9c2fca31074d500f Marion started the topic Sleep code not working with Maxbotix 7389 in the forum Mayfly Data Logger https://www.envirodiy.org/topic/sleep-code-not-working-with-maxbotix-7389/ Fri, 06 Dec 2019 22:45:08 -0500 We have a project which requires only reading a Maxbotix 7389 and using the result to trigger taking a water sample.

With cold weather we have started getting bad (300 mm) data values sometimes. We were using pin 18 to supply the Maxbotix power and pin 19 to read. Sleep code worked fine. But, we would like to test supplying power to sensor…[Read more]

]]> 8248cd3f2affdc4c610353bb4b741e93 Marion posted an update: I am looking for the Sodaq_PCint_PCint0 library. Long ago I […] https://www.envirodiy.org/activity/p/4507/ Mon, 02 Dec 2019 17:25:35 -0500 I am looking for the Sodaq_PCint_PCint0 library. Long ago I installed Sodaq_PCint_Mod in my Mayfly libraries folder. I have not been able to find the _PCint0 library in the latest libraries on Github. Was the Sodaq_PCint library updated to a version the same as _PCint0?

]]> 1 ebf8889158e795041f52549773a383a5 Marion started the topic ISE Nitrate Electrodes for continuous in-stream monitoring in the forum Environmental Sensors http://envirodiy.org/topic/ise-nitrate-electrodes-for-continuous-in-stream-monitoring/ Tue, 29 Nov 2016 18:21:09 -0500 Does anyone have any experience with the ISE nitrate electrodes for continuous monitoring directly in a stream? These appear to be the only “affordable” option for nitrate monitoring. The manufacturers’ literature seem to indicate that these may have a short lifetime before replacing the modules. However, there was a paper for work done in…[Read more]

]]> 8118c4e530ac8d2cc8f64c5c54a72119 Marion started the topic Battery Power Options in the forum Mayfly Data Logger http://envirodiy.org/topic/battery-power-options/ Fri, 25 Nov 2016 16:40:06 -0500 Can the Mayfly be powered by a 4.5 volt alkaline battery pack? For a monitoring station under a bridge or in deep shade this would be an low cost option to supply power for long term logging where solar recharging is not feasible. The borad schematic shows a voltage regulator (SPX 3819) connected to the LiPo battery connectors which appears to…[Read more]

]]> 04e717798f17592d92e2e19d71da3af8 Marion posted an update: Is there any data available for estimated power drain from […] https://www.envirodiy.org/activity/p/1861/ Fri, 28 Oct 2016 04:34:14 -0400 Is there any data available for estimated power drain from Mayfly logging 2-4 sensors once every 5 to 10 minutes- running only on the LiPo battery and without solar recharging?

]]> 2 a4a29c98ffa874f9e37a980c6dac2c20 Marion started the topic Sample Sketches for Mayfly in the forum Miscellaneous http://envirodiy.org/topic/sample-sketches-for-mayfly/ Fri, 14 Oct 2016 20:54:55 -0400 The software section for the Mayfly shows some sample sketches which should be very useful in building user specific sketches. Can these be made available in a library somewhere so that they may be downloaded and used without having to retype the code? This would save considerable time and effort.

Thanks

]]> a4a29c98ffa874f9e37a980c6dac2c20 Marion started the topic Sample Sketches for Mayfly in the forum Miscellaneous http://envirodiy.org/topic/sample-sketches-for-mayfly/ Fri, 14 Oct 2016 20:54:55 -0400 The software section for the Mayfly shows some sample sketches which should be very useful in building user specific sketches. Can these be made available in a library somewhere so that they may be downloaded and used without having to retype the code? This would save considerable time and effort.

Thanks

]]> b9278ec38559cc719e7357b3ce58bcbc Marion replied to the topic Problem with Arduino IDE loading Mayfly board data from github website in the forum Mayfly Data Logger http://envirodiy.org/topic/problem-with-arduino-ide-loading-mayfly-board-data-from-github-website/#post-1749 Fri, 14 Oct 2016 20:42:18 -0400 As suggested by Paul, once I had loaded IDE version 1.6.5 the communication problem was resolved. I was able to complete the installation and start up the Mayfly without any other issues.

Thanks

]]> 1337dd3275014b62e74f1b690f02e0d2 Marion started the topic Problem with Arduino IDE loading Mayfly board data from github website in the forum Miscellaneous http://envirodiy.org/topic/problem-with-arduino-ide-loading-mayfly-board-data-from-github-website/ Mon, 10 Oct 2016 20:38:00 -0400 I am running Windows 10 running 64 bit. The Arduino IDE downloads, installs and starts up. However, when I plug the Mayfly into a USB port and then go to the IDE Board Manager to select the board under “Contributed”, it does not appear and at the bottom of the IDE screen the error message appears: “error downloading:…[Read more]

]]> 1337dd3275014b62e74f1b690f02e0d2 Marion started the topic Problem with Arduino IDE loading Mayfly board data from github website in the forum Miscellaneous http://envirodiy.org/topic/problem-with-arduino-ide-loading-mayfly-board-data-from-github-website/ Mon, 10 Oct 2016 20:38:00 -0400 I am running Windows 10 running 64 bit. The Arduino IDE downloads, installs and starts up. However, when I plug the Mayfly into a USB port and then go to the IDE Board Manager to select the board under “Contributed”, it does not appear and at the bottom of the IDE screen the error message appears: “error downloading:…[Read more]

]]> 5418be9640faef02abf40f288ed051ea Marion became a registered member https://www.envirodiy.org/activity/p/1777/ Thu, 29 Sep 2016 22:53:56 -0400 0