neilh20

Hi James, if you have the spare jumper cable sockets you could try it and it probably will work.

The challenge is the Mayfly doesn’t have a lot of capacitive buffering and the LiIon battery performs that function.  It might be more reliable to have a battery on each Mayfly and run the solar panel to both.  Of course the boards need to be kept p…[Read more]

Wow thanks so much for sharing, and no problem with your English.  I’ve been in that situation where its difficult to debug ModularSensors/Mayfly as the software implementation using time loops is so time sensitive.

Are you planning on using a git to store the programs with an open source license? Its very nice if you do and gives some…[Read more]

@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]

Some other links .. I’m trying four links to see if it passes the spam filter ..
https://github.com/neilh10/ModularSensors/wiki

https://github.com/neilh10/ms_releases/wiki
https://github.com/neilh10/ms_releases

https://github.com/neilh10/ms_hardware

@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]

@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]

For the battery, seems to me there is two engineering approaches, specification and characterization.
For the specified battery 4400mAh https://www.adafruit.com/product/354
which has a listed data sheet from the manufacturer – https://cdn-shop.adafruit.com/product-files/354/C449_-_ICR18650_4400mAh_3.7V_with_PCM_20140728_APPROVED_8.18.pdf
it has a…[Read more]

@mbarney, thanks for the settings.   What was the sim supplier that you used – a Verizon direct, or an MNVO like REVX.

I did get an email earlier this week from SimCom that there 7080G was now certified by Verizon, so good to know it works 🙂

<h2 class=”user-nicename”>@mbarney</h2>
@mbarney on Mayfly 1.1 I connect SJ17  – that enables the Blue Network Status LED, and indicates the progress of the LTE-CATME connection.   Off – no power,   ( I think)  ON – attempting connection,   FLASHING – connecting

For Mayfly1.1 I also

Solder SJ15  – assumes 4400mA hr battery, and allows 1A charg…[Read more]

I’ve released an expanded Modbus/RS485 Wingboard for community design review

https://github.com/EnviroDIY/Mayfly-Modbus-Wing/tree/master/knh002-MayflyWingShield/rev8

I’d welcome design comments,  on https://github.com/EnviroDIY/Mayfly-Modbus-Wing/issues/3 by Monday 2022-July-20 12noon PST.   Easier to correct any possible problems early on, th…[Read more]

Hello Erik, hmm perhaps I’m coming from too many years of reading code,

Yes the order matters for the code, that the instance follows the the constructor.

What you are looking at I think is  “// .. sensor” , and that  is a comment

It does look like it may have been swopped, but its only descriptive text.  Getting descriptions to match the co…[Read more]

Hello Erik, I’m sorry I still don’t understand your question.

Hello Erik, sounds like you are on the path to learning Cpp.  One issue to keep in mind is that the code is what happens, the reality check, the documentation is for readability.  You may want to be list what gas sensor you are looking at for the max help.

So I don’t follow your question  – where do you get the code snippet from the first se…[Read more]

For  powering I am using the new Solar2 connector.

It requires a very precise diameter solid core wire – and took me some time to find it as old fashioned “Bell Wire” 20AWG, which I got from local Lowes store.

The needs to be – 20-26 AWG solid core. It also needs exactly matched wire strippers. If the wire strippers are too small a dia, its…[Read more]

An update on measuring battery voltage. I’ve purchased a number of Mayfly1.1 for a project. And on testing one of this batch, the noise level of measuring LiPo is better – which is great.  The noise level of resistors is part of their  specification, or it might be just luck in this case.  Often a batch of noisy resistors is because the ma…[Read more]

Hi Jake, my take is its complex to be able to decode why MMW isn’t showing data ~ it needs a system look, location aspects (solar looks excellent) ,  maintenance inspection of site,  reliability of hardware/battery/mechanics reliability of software on the Mayfly, reliability of software at MMW

It would be useful to know your configuration i…[Read more]

Thanks. The project perspective is often – initial qty and then what might be follow on qtys.  Of course project planning is only a what if, and no guarantee

In my experience, one of the challenges with building an electronics board, other than the world wide supply chain issues,  is that the base cost of engineering often means that at least 5…[Read more]