EnviroDIY | RogerS | Mentions https://www.envirodiy.org/members/rogers1313/activity/mentions/ Activity feed mentioning RogerS. Sun, 05 Apr 2026 14:59:11 -0400 https://buddypress.org/?v= en-US 30 hourly 2 bce85e68180db849681a0c419e5a083f neilh20 replied to the topic Power usage of Mayfly1.1 with Hydros 21 cTD and LTE BEE cell modem in the forum Mayfly Data Logger https://www.envirodiy.org/topic/power-usage-of-mayfly1-1-with-hydros-21-ctd-and-lte-bee-cell-modem/#post-17794 Mon, 08 May 2023 17:02:17 -0400 @rogers1313  gosh its all depends on the software you are using – what’s the version of software and the source. Since its open source software and hardware, and you can look at the software – its possible to guestimate those answers. Then since its software that causes the most power usage, it needs testing.

For a turnkey system, assembled off…[Read more]

]]> e8e5555b9edbce8afe7119f36e70164c neilh20 replied to the topic 900 Mhz Point to point and cellular connection. in the forum Mayfly Data Logger https://www.envirodiy.org/topic/900-mhz-point-to-point-and-cellular-connection/#post-17624 Fri, 24 Feb 2023 21:02:25 -0500 @rogers1313 interesting question, and I’ve been mulling over possible solutions as it seems very attractive.

The area undefined , is power,  cost of the cellular gateway, and reliability of the connection.

Its possible to do the individual elements easily – 900Mhz point to point –  and cellular – but then introduce a packet with the “readings i…[Read more]

]]> d3a7a1bafbadec484471bbecb9352a71 dan@wachusett replied to the topic Hydros 21 CTD sensor calibration question in the forum Environmental Sensors https://www.envirodiy.org/topic/hydros-21-ctd-sensor-calibration-question/#post-17351 Mon, 26 Sep 2022 17:34:09 -0400 <div class=”bbp-reply-author”>@rogers1313</div>
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<div>I have used the Hydros-21 for several years now and can add a bit to what Neil has mentioned. I also asked the engineers at Meter Group about temperature compensation and found their response unhelpful. My Hydros21 sensors output water depth that is highly affected by temperature (I…[Read more]

]]> 839f07d2847facd1fdc6c22d345a14f4 neilh20 replied to the topic Hydros 21 CTD sensor calibration question in the forum Environmental Sensors https://www.envirodiy.org/topic/hydros-21-ctd-sensor-calibration-question/#post-17349 Fri, 23 Sep 2022 19:37:47 -0400 @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]

]]> 34e626bf8a859c584c90ce30d8dfd8c3 neilh20 replied to the topic Geographically Scaling Modular Sensors in the forum Mayfly Data Logger https://www.envirodiy.org/topic/geographically-scaling-modular-sensors/#post-17336 Thu, 15 Sep 2022 18:03:59 -0400 @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]

]]> 052572074d3e557a7e24338e13678025 neilh20 replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-v1-1-technical-questions-forum-thread/#post-17325 Wed, 14 Sep 2022 19:42:44 -0400 @rogers1313 my systems only have the Yellow led ON when actually charging. If the battery is charged, not charginng then it is OFF. The description in “Section S”, beneath the pics https://www.envirodiy.org/mayfly/hardware/details-and-specs/ says

A yellow LED (labeled CHARGE) will light anytime the battery is being charged. Once a battery is…

[Read more]

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