Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of 
@neilh20
Active 1 days, 4 hours ago-
Anthony Aufdenkampe replied to the topic MMW not receiving data in the forum Monitor My Watershed 2 years, 11 months ago
@mbarney & @neilh20, the CSV downloads are not an effective way of accessing data gaps, because that mechanism relies on the same corrupted catalog crosswalk that underlies the problem with the sparkline plots.
There are really only two ways for you to assess data gaps:
- Keep a record of server response codes from RESTful POST requests, from…
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James_NZ replied to the topic Problems with OBS3+ in the forum Environmental Sensors 3 years ago
Thanks @neilh20. I will definitely be interested in these when they are available.
@aufdenkampe do you have any feedback about YOSEMITECH turbidity sensors? My questions are:
1) Are they as reliable as other turbidity sensors, i.e. do they drift more readily, or provide strange values? For $510USD (non-wiper) or $680USD (wiper), they seem…[Read more]
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Matt Barney replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 1 months ago
Thanks to both of you for your responses! I think I had just figured out the cause of my problem right about the time you were posting them, but needed to continue refining and testing my code before replying.
What’s working now is:
- In the sensor’s setup() function, set trigger pin to an output
- at powerUp(), set pin HIGH
- at wake(), run the…
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Matt Barney replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 1 months ago
@shicks Thanks for those details. I wonder whether it could be the turbidity sensor, rather than the Mayfly, that’s actually drawing power, but I wouldn’t have thought it could do that while (or if) the Mayfly is sleeping. A bit more about my circuit:
I’m powering the Turner from Mayfly’s switched 3V3. The Turner’s analog output is 0-5V, which…[Read more]
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Robert S replied to the topic Inexpensive DIY conductivity sensor in the forum Environmental Sensors 3 years, 11 months ago
I had seen that post on the $3 EC meter several months ago and experimented with building a variation of that sensor but had little success. Thought that it might be better to buy something that already works, to better understand it, an not try to reinvent the wheel.
I would love to see what you come up with for…[Read more]
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Sara Damiano replied to the topic Connecting XBee3 LTE to the internet in the forum Mayfly Data Logger 4 years, 5 months ago
Oops. So, it never tried for longer than 15 minutes with that sketch because the watchdog doesn’t get “fed” while it’s waiting for the internet and it “bites” (ie, forces the board to reset) after 15 minutes. But 15 minutes is still a pretty long time to wait.
After the first connection in a new location, it should connect much faster in…[Read more]
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colemanjj posted an update 5 years, 5 months ago
@neilh20,
I’m interested in your mention of working on a ” Water Depth probe using gas sensor”. I’ve been testing a water depth probe made with a atmospheric pressure sensor (BME280) in mineral oil and encapsulated in a section of PVC with a flexible diaphragm at one end. It seems to be working but I need to calibrate etc. I haven’t seen this…[Read more] -
fisherba replied to the topic Newbie Mayfly Setup for RS485 sensor to internet in the forum Mayfly Data Logger 5 years, 6 months ago
My 2-cents on which branch to use is that the *model* structure is that end users work from the master branch. @neilh20 might be overqualified as an end user, so if future readers show up on this thread for help, they may be mislead by the notion that develop is the better branch.
But the Modular branches have been so very active in development…[Read more]
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Phillip-UGA replied to the topic Deployment options in the forum Infrastructure and Equipment 6 years ago
Thanks @neilh20. Thanks for your response. I just installed one of our 10 sensor stations and will update when we have another one installed.
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Arnoud posted an update 7 years, 3 months ago
@neilh20 Dear Neil, I read you have experience with Particle. I have bought a Particle Electron for remote monitoring via mobile phone network. I also have a Mayfly to locally record the data. Is there a way I can ´combine´ Particle Electron and Mayfly? For me, the advantage of Particle is that is already comes with a chip that operates in Latin A…[Read more]
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Heather Brooks posted a new activity comment 8 years, 10 months ago
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Heather Brooks posted a new activity comment 9 years, 2 months ago
@neilh20, thanks for jumping in and making the first guest blog post on EnviroDIY! Looking forward to reading more about your projects.
Hi John – feel free to email me direct on neilh at biomonitors.com as I get it quicker.
comments: generally pressure sensors are pretty easy to understand and calibrate for a water column – but the devils in the detail. What range (eg 0-10′) and accuracy do you want.
1) for the BME280 it hasn’t got an easy mechanical port to isolate the pressure…[Read more]
I’ve got the calibration OK and I’m using another BME280 for atmospheric compensation. Both BME280s use I2C.
What I’m unsure of is submersing the BME280 in mineral oil. It seems to work but I haven’t heard of anyone putting the BME280 in mineral oil, or any pressure sensor in mineral oil for that matter, to isolate it from the water. Any…[Read more]
BME280 – I don’t know. Its a materials/chemistry issue – how does mineral oil react with the materials in the sensor. Probably easy to test – but how to do longer term reliability testing.
Years ago, a Motorola/Freescale product “Pressure sensor” engineer suggested I use a high molecular silica gel for interfacing to its air sensor diaphgram.…[Read more]
neilh, Thanks for your thoughts on this.
I’m looking at small rivers and streams. So depth change is generally less than 10 feet, in most cases max change of 1-5 feet. I’d like to get less than 0.1% accuracy and +_ 0.1 inch but I could live with as much as +_ 0.5 inch if I had to.
I’ve been running the BME280 in the mineral oil for about 8 weeks…[Read more]
that sounds pretty fantastic. Of course doesn’t indicate long term reliability and the issues are mechanically how to connect the water pressure with the mineral oil. I’d be interested in how you are thinking about doing it in a steam with the logger connection is say 20′ above the point of measurement. But its giving me someother ideas. I’m…[Read more]