The Hydros-21 sensor already does internal temperature compensation of the depth data, so you shouldn’t have to provide your own compensation. The sensor outputs the depth readings in millimeters of water above the sensor, so you don’t even have access to the raw pressure readings like you might with a basic pressure transducer, so you’d have to…[Read more]
I haven’t looked into it much, but I would guess that module, and several other bee-shaped LoRaWAN modules would work just fine with the Mayfly. There is *not* any direct support for any sort of radio communication right now in ModularSensors. I would love to have support for it, but still a “someday” feature right now. Right now most of our st…[Read more]
Thanks @fisherba… I will take a look at the updated sketch. It seems like this correction should be part of the device firmware, but perhaps it was modified at some point and not included. I may try to apply this correction to my previous data downloads and see if fixes the issue. If so, then will update the sketch on the mayfly to perform this…[Read more]
Im just wondering if anyone has considered using the Helium network with the Mayfly? Essentially it’s a LoRaWAN network where the infrastructure is owned by the public. They are incentivising network expansion by rewarding hotspot owners with HNT, their own cryptocurrency.
Im interested because there is potential to establish a local H…[Read more]
Charitha (CJ) replied to the topic How to get a 5V signal out based on a sensor reading in the forum Mayfly Data Logger 3 days, 11 hours ago
Thank you so much for the replies. The 5V signal duration varies with site and rain event conditions. However, with my previous field work, using a campbell system, the valve controlled by the actuator was open (5V) for an average of 10 mins (but could be a few hours on extreme rainfall events). How would the duration affect the mayfly? I’m using…[Read more]
I was able to get it to work correctly. The only thing I changed was removal of the UUIDs for all of the variable pointers. I also moved the voltage pin so D7 was getting 5v instead of 3.3. I don’t know if that was what caused the initial error but it’s working now.
Shannon Hicks replied to the topic How to get a 5V signal out based on a sensor reading in the forum Mayfly Data Logger 4 days, 3 hours ago
What’s the duration of the 5v signal you want to generate? And how much current does the 5v actuator draw? Pin D22 controls the switched 3.3v and 5v outputs together, so there’s no way to separate the two. However, a Hydros-21 CTD sensor uses very little current when it’s constantly powered, so you could plug the CTD into the D4-5 Grove ja…[Read more]
I’d need to see the rest of your sketch to make sure everything else is set up correctly for reading the sensor properly. Can you post your entire sketch, and tell me what version of the Modular Sensors library you’re using, and when you downloaded the other recommended supporting libraries like the EnviroDIY_SDI12 library?
I am able to retrieve values from my Decagon ES2 sensor, but only temperature. Conductivity comes back with a value of 0.0. When I hook it up to a Campbell Scientific CR1000 logger, both conductivity and temperature come back with reasonable values. In fact, temperature is the same using the CR1000 as it is the Mayfly. I’m using the pre-programmed…[Read more]
Anthony Aufdenkampe replied to the topic How to get a 5V signal out based on a sensor reading in the forum Mayfly Data Logger 4 days, 13 hours ago
Check out this repo: https://github.com/EnviroDIY/Trigger
This example sketch shows how it would be used in combination with the ModularSensors library: https://github.com/EnviroDIY/Trigger/blob/master/examples/simple_logging/simple_logging.ino
It’s old, so some components are probably outdated, but it’s generally what you’re looking for.
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