Activity – EnviroDIY

Fiona started the topic Installation in Soft Substrate/Docks and Buoys in the forum Infrastructure and Equipment 1 day, 4 hours ago

Hi All,

We are in an area that experiences a 5-6 foot tidal range, and many of our sites are composed of salt marsh with soft, muddy substrate. Has anyone had any issues using the suggested rebar installation in this type of environment? I’d like to avoid the possibility of sediment burying our sensor setup and was curious if anyone had more…[Read more]
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Matt Barney replied to the topic Code change for Meter Hydros 21 CTD in the forum Mayfly Data Logger 1 day, 23 hours ago

A couple bits of additional info. To visually identify whether your Hydros 21 is a Gen 1 or a Gen 2, see attached photos of the sensor head on each version. Note that some Gen 1’s had red cables, but not all.

Second, as Shannon noted in the post she linked to above, the address-setting on the Gen 2 is slightly more finicky; you just have to…[Read more]
Shannon Hicks replied to the topic Code change for Meter Hydros 21 CTD in the forum Mayfly Data Logger 2 days, 21 hours ago

Yes, the update made to the ModularSensors code in in order to fix Hydros 21 is backwards compatible. I mentioned it last week in this post: https://www.envirodiy.org/topic/hydros-21-decagon-ctd-reading-error/#post-17066

It seems that in the past year Meter Group made some changes to the amount of time the CTD sensors need to take a…[Read more]
Stephen H replied to the topic Code change for Meter Hydros 21 CTD in the forum Mayfly Data Logger 3 days, 4 hours ago

Does the new setting still work with the older sensors? Do we need to maintain 2 sets of code? Thx.
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fisherba replied to the topic Code change for Meter Hydros 21 CTD in the forum Mayfly Data Logger 4 days, 5 hours ago

Noted. Thank you. This is in my next couple weeks of existence.
Matt Barney started the topic Code change for Meter Hydros 21 CTD in the forum Mayfly Data Logger 4 days, 6 hours ago

I don’t recall seeing any announcement on the forums, so I thought I’d share with everyone that the latest Hydros 21 sensors (Generation 2) require ModularSensors version 0.33.3 or later. We recently learned this after replacing a failed sensor in the field, and our Mayfly could no longer communicate with it. Since we have dozens of EnviroDIY…[Read more]
James_NZ commented on the post, How Do EnviroDIY Monitoring Stations Compare With USGS Stations? 6 days, 2 hours ago

Hi Scott, interesting article! Regarding turbidity, Rob Davies-Colley, an academic here in NZ has been doing some research comparing nephelometers, as turbidity thresholds are often written into environmental […]
Matt Barney replied to the topic Error setting Hydros21 address in the forum Environmental Sensors 1 week, 1 day ago

That was it – thanks!

-Matt
Shannon Hicks replied to the topic Error setting Hydros21 address in the forum Environmental Sensors 1 week, 1 day ago

When you’re connected to the Mayfly with your computer, open the Arduino IDE’s Serial Monitor and check the settings of the dropdown box in the lower right hand part of the windows next to the baud rate. It should be set to “No line ending”. If you have it set to anything else, you’ll usually get an error when setting the address using that s…[Read more]
Matt Barney started the topic Error setting Hydros21 address in the forum Environmental Sensors 1 week, 2 days ago

I’m getting the error “Not a valid address” when using the b_address_change.ino sketch in Arduino IDE. However, the address does appear to be getting set as expected, and I can change it to 2 and back to 1; it outputs the error each time, so it just looks a little odd. I’ll attach the output from the serial monitor below.

This is with a new Gen 2…[Read more]
Shannon Hicks replied to the topic Hydros 21/Decagon CTD: reading error in the forum Environmental Sensors 1 week, 2 days ago

Yes, it’s just one line (currently line 107) of the MeterHydros21.h file that contains the most important change, which is this line: #define HYDROS21_MEASUREMENT_TIME_MS 1000

The previous setting was 500 milliseconds but it turns out the new Gen 2 CTD sensors need…[Read more]
Matt Barney replied to the topic Hydros 21/Decagon CTD: reading error in the forum Environmental Sensors 1 week, 2 days ago

We’ve just had a failure to communicate with our newest Hydros 21 sensors (likely Gen 2). While I’ve had success setting the address with the b_address_change sketch, my standard Mayfly code can’t talk to the sensor and returns values of -9999. It looks to me like the SDI-12 library has not changed since May 2021…[Read more]
KBR Kings River started the topic Maxbotix ModularSensors in the forum Environmental Sensors 1 week, 2 days ago

Using the ModularSensors code for a Maxbotix HRXL Ultrasonic Range Finder below

it references a sonarSerial and mentions having to set it up in the “Setting for Additional Serial Ports” but I am unable to find the correct “settings” to start the serial port? What are the the best Groove Pins to use, for the Sonic pins? For a Trigger pin and…[Read more]
BrianJastram commented on the post, How Do EnviroDIY Monitoring Stations Compare With USGS Stations? 1 week, 5 days ago

Scott, your study is a riveting read and very well done. I find your conclusions encouraging to the work I have been doing and to the field of EnviroDIY. Your analysis provides the answers to questions that we all […]
KBR Kings River started the topic Multiple OneWire Sensors Multiple Pins in the forum Environmental Sensors 1 week, 6 days ago

I would like to monitor temperature, of water, ground and air. I was thinking of building one wired sensor to the water, then another wired sensor to ground and air. Thus I would need two OneWire Bus Pins, .and the one OneWire Bus pin would have two sensors attached.

Using a few Arduino Example sketches I can get this to work and read, mu…[Read more]
Stephen H replied to the topic Mayfly 1.0, USB C not connecting on Ubuntu 22.04? in the forum Mayfly Data Logger 2 weeks, 4 days ago
Was able to get serial port monitor working on Ubuntu 22.04.
1. remove brltty package, it’s for console braille communications.
  sudo apt remove brltty
  sudo apt autoclean && sudo apt autoremove
2. disable modemmanager package, I used the instructions on this page
  https://askubuntu.com/questions/216114/how-can-i-remove-modem-manager-from-boot
Both…[Read more]
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Scott Ensign wrote a new post, How Do EnviroDIY Monitoring Stations Compare With USGS Stations? 3 weeks, 1 day ago

The United States Geological Survey is the primary federal agency responsible for monitoring water resources in the U.S. in partnership with over 1,885 agencies and organizations. This network of over 8,500 […]
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