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neilh20 replied to the topic Yosemite library cant be found! in the forum Environmental Sensors 1 years, 3 months ago
Hi Cal, its good if you could include the compile errors, even perhaps as an attachment. In your current form you are making anybody wanting to help do a lot more work.
As you are posting in this old thread on Yosemite-library I’m guessing its something to do with that.
I had a similar problem with Yosemitech Lib described here-…[Read more]
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neilh20 started the topic Modem Characterization in the forum Mayfly Data Logger 1 years, 4 months ago
A few people seem to have mentioned modem failures. I’m wondering if people who have experienced modem failures could share what data they have on the the failures, part number, how they detected a failure, and how many months the devices where in the field.
I’m a hardware engineer, and when components start failing I look to pay attention to…[Read more]
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neilh20 replied to the topic Arduino NB-IoT for ISCO autosampler in the forum Infrastructure and Equipment 1 years, 4 months ago
While browsing something else, I came across this ISCO 3700 references – no idea if its workable
https://github.com/EnviroDIY/Trigger
https://github.com/EnviroDIY/Trigger/tree/master/hardware/ISCO-Mayfly-Trigger
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neilh20 replied to the topic Primary powering in cold settings in the forum Infrastructure and Equipment 1 years, 4 months ago
@khaase great to hear – do you have a pn for the cap – be interested see what the internal ESR is.
Seems to me a way to monitor the battery for maximum life is to read the voltage unloaded, and then again when it is loaded. The capacitor moderates the voltage reading, but still droops. So it would be how much droop (lack of charging from high i…[Read more]
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neilh20 replied to the topic SDI-12 Library in the forum Other Data Loggers 1 years, 4 months ago
@vogelrnws I had been looking at porting it to another processor and been using it and digging into the code. I’ve looked at some of the RP2040, but I’m cautious about its ability to go into low power – but haven’t looked at it in depth.
The SDI-12 lib uses a software based UART – running at 1200Baud, so 1200Baud is pretty slow and it does handle…[Read more]
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neilh20 replied to the topic Arduino NB-IoT for ISCO autosampler in the forum Infrastructure and Equipment 1 years, 5 months ago
@hannahlb if I understand you – you have 4 geographically distributed ISCO samplers (say more than 100m apart) and you would like to trigger them when a threshold is exceeded from a Solinst level sensor. The trigger would be communicated via messages on the telemetry NB-iot?
Probably the best way to think about it is in stages
1) figure if t…[Read more]
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neilh20 commented on the post, Open Data and Open Hardware: Tools for Collaborative Solutions to Water Challenges 1 years, 5 months ago
Gosh complex – it was great in the above all the linkages – reviews technically to my mind are features, and synergy in using them. Seems to me reviews can be on how to use (introducing to a new audience), tea […]
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neilh20 replied to the topic Primary powering in cold settings in the forum Infrastructure and Equipment 1 years, 5 months ago
@khaase interesting getting the LiSOCL2 activated.
My 2Cents is it would be good to characterize the 350mA pulse – and isolate it from the mega1284’s high impedance LiSOCL2. That could mean that for the “high impedance” (for a battery) LiSOCL2, the current draw has to be kept below a threshold, treated as a constant current source.…[Read more]
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neilh20 started the topic OSH – a discussion in the forum Mayfly Data Logger 1 years, 5 months ago
For electronics hardware – most people are used to shopping and then buying – simple transaction – however Open-Source Hardware at the board level can be different.
@ensign published https://www.envirodiy.org/tools-for-collaborative-solutions-to-water-challenges/
So, I’m interested in a discussion of how can OSH is used – Mayfly and other.…[Read more]
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neilh20 commented on the post, Open Data and Open Hardware: Tools for Collaborative Solutions to Water Challenges 1 years, 6 months ago
Great to have the overview and direction. The creators of Open Hardware do need support in understanding what it takes to design, manufacture and sell the hardware, and also the community to do it smartly – open […]
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neilh20 replied to the topic Temperature sensor severed by rodents? in the forum Miscellaneous 1 years, 6 months ago
Mostly the cables we put in are armored – 3/4″ flexible and can be joined easly – something like https://www.lowes.com/pd/HydroMaxx-3-4-in-x-50-ft-Black-Flexible-PVC-Pipe/1002884464
Also seen cables chewed by squirrels .
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neilh20 replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger 1 years, 6 months ago
Hi @khaase I haven’t figured out what the source of the reset is, as the AVR1284 Arduino code discards it – very frustrating.
I have used low ESR capacitors – something like Digikey 732-9079-1-ND CAP ALUM 680UF 20% 10V THRU HOLE LOW ESR
Whenever I have longer wires, a power switch, or current measurement, with the LiIon battery, I get some…[Read more]
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neilh20 replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger 1 years, 6 months ago
Maybe of interest https://www.envirodiy.org/topic/primary-powering-in-cold-settings/
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neilh20 replied to the topic lifepo4 solar system in the forum Infrastructure and Equipment 1 years, 6 months ago
@davem great topic. I was at a SSU Eng Presentation yesterday by Enphase a leading solar equipment provider and they use LiPo4 in their battery 3.3Kwh/10Kwh systems. All about safety. LiPo4 slightly less power density — but that isn’t a problem with stationary systems. No temperature stability. Fire issues are a big deal. A recent newsp…[Read more]
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neilh20 replied to the topic DF Robot KIT0139 Level Sensor in the forum Environmental Sensors 1 years, 7 months ago
Hello Dave, thanks for sharing.
I had thought of getting the device, because of the price, so interesting.
The issues I saw is that it has two sources of analog error and unquantified temperature coeffocient for each source of error.
Every “analog” device typically has a temperature dependency, This would be the depth sensor itself, which…[Read more]
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neilh20 replied to the topic Linking two Mayfly Boards Together in the forum Mayfly Data Logger 1 years, 7 months ago
Hi James, if you have the spare jumper cable sockets you could try it and it probably will work.
The challenge is the Mayfly doesn’t have a lot of capacitive buffering and the LiIon battery performs that function. It might be more reliable to have a battery on each Mayfly and run the solar panel to both. Of course the boards need to be kept p…[Read more]
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neilh20 replied to the topic SDI-12 sniffer based on Raspberry Pi in the forum Miscellaneous 1 years, 7 months ago
Wow thanks so much for sharing, and no problem with your English. I’ve been in that situation where its difficult to debug ModularSensors/Mayfly as the software implementation using time loops is so time sensitive.
Are you planning on using a git to store the programs with an open source license? Its very nice if you do and gives some…[Read more]
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neilh20 replied to the topic Hydros 21 CTD sensor calibration question in the forum Environmental Sensors 1 years, 7 months ago
@rogers1313 – its a good “engineering question”. speaking as an electrical engineer and some one that has blogged on understanding traceability, measurement range, measurement resolution. measurement accuracy and total error band of measurement being different aspects of the measurement.
In short the Hydro 21 has calibrated measurements th…[Read more]
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neilh20 replied to the topic Geographically Scaling Modular Sensors in the forum Mayfly Data Logger 1 years, 8 months ago
Some other links .. I’m trying four links to see if it passes the spam filter ..
https://github.com/neilh10/ModularSensors/wikihttps://github.com/neilh10/ms_releases/wiki
https://github.com/neilh10/ms_releases -
neilh20 replied to the topic Geographically Scaling Modular Sensors in the forum Mayfly Data Logger 1 years, 8 months ago
@rogers1313 great to hear of your project from the technical questions thread.
This thread on scaling may be of interest.
I just posted a lot of links for scaling systems, and I forgot that enviroDIY doesn’t allow too many links in messages. (spam protection I guess).
I’m scaling some systems for Tu N California, soley stage gauges at…[Read more] - Load More