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@tumayflybearriver – thanks for brining it up.  Its nuts, but  looks to me like the signature of  “thrown away data” by  ModularSensors software that runs on the Mayfly, and the ODM2  software on monitormywatershed.

I’ve raised the issue of reliable delivery in 2018, and implemented it on my systems and offered it to the mainline Modu…[Read more]

Have you been to the station to clean the sensor lately?  Also, I’d recommend replacing the logger’s battery with a fully-charged one.  Sometimes when those battery packs are starting to fail (from corrosion on the terminals under the plastic wrapper) they will generate noise which can sometimes affect the sensor readings.

No, the Mayfly datalogger doesn’t know if any data is missing from the website, it just tries to send it every 5, 10, or 15 minutes (or whatever interval it is programmed for).  If the data doesn’t get to the website database, the logger won’t know, and doesn’t send any old data to fill in the gaps. You’ll need to visit the station and manually…[Read more]

I’ve been swamped lately, so I’m behind on sensor requests.
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<div>@fionasouthwell Are you sure you’re measuring *specific conductance*? From what I know of the Atlas sensors, they don’t measure specific conductance, they measure conductivity. I just very quickly skimmed their latest manual and it doesn’t look like that’s changed. To get…[Read more]

Hi Fiona, @srgdamiano may be able to help you with this. There is also a pathway within the Monitor My Watershed site itself for making sensor requests. I’ll describe it here in case it is also helpful to others.

When adding a new sensor to a site on MonitorMW, if you don’t see what you need in the Add New Sensor modal window, scroll to the…[Read more]

@shicks I’m also going to be adding an air temperature sensor that has a 12-volt fan in the radiation shield. The fan can run at lower power by using pulse width modulation. I’m wondering if there might be a way to accomplish this with the power relay, since the fan will have to be connected directly to the battery like the heaters on my other…[Read more]

Thanks, Brian. What I’m really looking for is the Mayfly sketch, one specifically for an SDI 12 interface.

Thank you Shannon!  Really appreciate you looking and finding the problem

in my code.  Works now!

Unfortunately no other turbidity sensor, just using distilled water.

Emailed you the current code.

Thanks!

It’s probably easiest if you email me your code so I can check it.  We used 8 of those sensors for 2 years in a continuous deployment and didn’t have any drift or loss of calibration, so I don’t think there’s anything else you need to do with it.  If you’ve got another type of calibrated turbidity sensor or a turbidity standard, you could do a c…[Read more]

Does the 511-a lose cal over time?  Is it confused because we had it un-powered for over a year?

I’m waiting for a USB to RS485 adapter to try to use the smartpc utility to see if calibrating the unit will do anything, as well as see if the units are working correctly.

Thanks.

Thanks Shannon,

I used mostly the same code but replaced the GUIDS and inserted into the originally working code for one of our current stations.

I initially tried with 0x01, and just tested again with 0x01.  The wiper wipes 3 times and stops.

Readings for temp and turbidity are still -9999.0 and -9999.0.

Thanks.