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neilh20 replied to the topic board layout files in the forum Mayfly Data Logger 2 years, 7 months ago
Erik any board that has a SAMD21 with a uSD/flashDrive and external RTC DS3231 https://www.adafruit.com/?q=DS3231&sort=BestMatch is probably a good target for using with ModularSensors. https://shop.sodaq.com/search/SAMD21/ and look for LTE cellular or other cell to match your local network. LoRa seems unlikely to work with MMW but could pos…[Read more]
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neilh20 replied to the topic Data Uploading but not Publishing in the forum Mayfly Data Logger 2 years, 7 months ago
Hello Nancy, With some students we created a new site https://monitormywatershed.org/sites/SSU_ENG_SD02/ and its having an issue with displaying the time in the front page TSV and I entered an issue on it …
https://github.com/ODM2/ODM2DataSharingPortal/issues/560
Looking at your https://monitormywatershed.org/sites/Tom-Nat/ seems…[Read more]
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neilh20 replied to the topic Seeking recommendations for PCB fab houses in the forum Miscellaneous 2 years, 7 months ago
I’ve been building electronic circuits since high school. In case its of any use, I’m now using Kicad 6.0 https://www.kicad.org/blog/ and it has been excellent for reasonable human place able surface mount geometries of 0402 and larger. There is an evolving library of component footprints . Any non-standard footprint are possibly where the real…[Read more]
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neilh20 replied to the topic Seeking recommendations for PCB fab houses in the forum Miscellaneous 2 years, 7 months ago
Well I’m working with some engineering students at 9am PST (10min) on how to modify Kicad files. A bit short notice but you could join in then if interested.
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neilh20 replied to the topic board layout files in the forum Mayfly Data Logger 2 years, 7 months ago
@Erik_G just an FYI, its made to look easy by Shannon, however it takes a lot of experience to get it right and then make it available as purchase.
Typically to do an order with a PCB assembly service, the qty of 50 is when there is the lowest cost per device. However assembly services only assemble to the instructions you provide. If you provide…[Read more]
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neilh20 commented on the post, New Mayfly v1.1 release date and Product Status page 2 years, 7 months ago
Got it thanks Phoenix 1778832 https://www.digikey.com/en/products/detail/phoenix-contact/1778832/2625556
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neilh20 commented on the post, New Mayfly v1.1 release date and Product Status page 2 years, 7 months ago
Hi Shannon, thanks so much for producing this page, its very helpful. The semiconductor shortage is so challenging for design and producing so really appreciate the forward looking availability column.
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neilh20 replied to the topic SDI-12 level shifting in the forum Environmental Sensors 2 years, 8 months ago
Just as refresh this is my data while working with a prototype SDI-12 level shifter.
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neilh20 replied to the topic Hydros CTD-10 Regularly Dropping Out (-9999) in the forum Environmental Sensors 2 years, 8 months ago
@james_nz my process is to stage systems in an accessible context to check the reliability of the systems. This comes from the school of hard knocks working with embedded processors like the Mayfly.
IMHO while ModularSensors software has some fantastic classes to be able to access the instruments and also to push to cloud locations, Ar…[Read more]
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neilh20 replied to the topic Hydros CTD-10 Regularly Dropping Out (-9999) in the forum Environmental Sensors 2 years, 8 months ago
@James_NZ – are all your setups the same?.
Have you got a spare setup that can be debugged in a local setting? (office with terminal connected)
I have a similar setup with an RS485 and SDI-12 on one system – but I maintain a test system to verify it before I deploy it.
https://monitormywatershed.org/sites/TUCA-Na13/
I have done work to rug…[Read more]
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neilh20 replied to the topic Hydros CTD-10 Regularly Dropping Out (-9999) in the forum Environmental Sensors 2 years, 8 months ago
@James ouch. Looking at the data file, its just the Decagon CTD/SDI-12? readings that are responding -9999 . Typically that means the (SDI-12?) protocol has failed to communicate with the instrument.
At the same time Yosemite/Modbus? is responding well.
The CTD is only occasionally failing, or failing in groups, but still working some of the…[Read more]
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neilh20 started the topic Digi XB3 status in the forum Mayfly Data Logger 2 years, 8 months ago
I got to talk with someone at Digi Business Development about the availability of the XB3 LTE (XB3-C-A2-UT-001)
They have supply chain issues with providing the XB3, they had hoped for it to be available in March, but its slipped, so …. end of year? but could change.
They said that Digikey is the largest distributor, and processes orders in d…[Read more]
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neilh20 replied to the topic CAUTION: Bricked XBee3 Cellular LTE-M/NB-IoT in the forum Mayfly Data Logger 2 years, 8 months ago
Nuts you lost one.
Unfortunately it take the Digi “Xbee TH Development Board” to do an upgrade. Hopefully the new ones will be come with the latest software.
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neilh20 replied to the topic Keller CTD Sensor in the forum Environmental Sensors 2 years, 8 months ago
Hi Dan, wow interesting it works to 3.2V. Yes RS485 should work well and it can go a long distance.
You do need a physical RS485 driver wing board that will fit with the UART pins. RS485 is a specific differential voltage protocol that can travel thousands of feet on two wires. The instrument requires 4 wires. See above for examples.
My…[Read more]
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neilh20 started the topic Investigating Micro$oft Azure in the forum Monitor My Watershed 2 years, 8 months ago
I’ve seeing articles on Azure and been curious about it, so I dug a bit deeper.
IoT is complex, so my starting point is to simplify and focus on environmental outdoor monitoring, or technically the “eco system” associated with ModularSensors from sensor to visualization.
For me the strengths of ModularSensors on Mayfly/Solar, are the inter…[Read more]
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neilh20 replied to the topic Is there a BMI soundscape? in the forum Environmental Sensors 2 years, 8 months ago
Thanks for checking with Dave on that. Good points about what might create some sounds.
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neilh20 started the topic Is there a BMI soundscape? in the forum Environmental Sensors 2 years, 8 months ago
Just wondering if anybody has leads on what sounds Benthic macroinvertebrates might make – the sound scape in streams?
I got a MachineLearning article this morning that referenced this story
I found this as well…[Read more]
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neilh20 replied to the topic Mayfly I2C Address in the forum Mayfly Data Logger 2 years, 8 months ago
@zeke-holloman communications – peer2peer – is a deep subject.
Many years ago I wrote the code for a comms stack to use the 9bit UART to poll an array of processors. In the end it was 2people for 18months to get it working reliably. So its not trivial, but i had a fantastic time with…[Read more]
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neilh20 started the topic Mayfly 1.0 Qu in the forum Mayfly Data Logger 2 years, 8 months ago
@shicks just wondering what the expected standard charge is for the Mayfly 1.0
I’m seeing via a USB Meter that with a USB-C charger that delivers 5.0V (and 2A capable) with a 4.4A LiIon battery at 3.8V that it is only charged 0.13-0.2A. Previously Mayfly 0.5 this was the expected 0.5A
Digging deeper into the BQ24074
“Input-based dynamic po…[Read more]
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neilh20 replied to the topic RS485 Schematic in the forum Mayfly Data Logger 2 years, 9 months ago
Hey great. Many thanks
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