neilh20

There is some onchip references, but maybe not useful. From the manual mega164A_PA-324A_PA-644A_PA-1284_P_Data-Sheet-40002070B.pdf   (applies to the mega1284)

Chp 23.2: “<span class=”fontstyle0″>Internal reference voltages of nominally 1.1V, 2.56V, or AV</span><span class=”fontstyle0″>CC </span><span class=”fontstyle0”>are provided On-chip. The v…[Read more]

Hey thanks for the overview. Welcome to the art of jumping in – and learning by doing (my philosophy though I’m an EE graduate) – though its beneficial to bring an engineering basis to analyzing the components, and then plug the components together.  The engineering basis can be thought of as a technical story – though for EE graduates we talk…[Read more]

Gosh Brandon, I successfully used the 900Mhz modules about 15years ago with the TinyOS framework.

Seems you are thinking of using it in a Peer-2-peer arrangement, possibly in a mesh configuration. A lot of options.

I wonder what your back ground is  – cause its sort of like jumping into the deep end, and you may wanna flesh out your plan – what…[Read more]

Hi @dani68k, welcome to EnviroDIY.

I’ve not got any experience on the ATmega32u4, and as a small AVR processor I would think you would need to customize your development for it. SDI-12 bit banging is very sensitive (unrelaible) if the timing isn’t configured right. Possibly using the USART would be better for timeing, but configuring that is…[Read more]

Thanks to @ptomasula for fixing https://github.com/ODM2/ODM2DataSharingPortal/issues/658

If I understand it right, the internal redirection for  POST to MonitorMyWatershed.org/api/data-stream/ HTTP/1.1 got broken with the upgrade to v0.15.0, and a http response of 301 was returned, which ModularSensors doesn’t handle. Of course its not a good…[Read more]

@dan-wachusett Gosh just seeing this – seems like you got that Keller CTD.

Just wondering did you follow the advice given from https://www.envirodiy.org/topic/keller-ctd-sensor/#post-16332

Partly its decoding the layers of software. The keller protocol is used to access the Keller CTD map. I find it most helpful to compare and trace how…[Read more]

Some recent posts here explain the current difficult environment for calculating power usage on the mayfly as its dependent on a fast response from the server.

https://github.com/ODM2/ODM2DataSharingPortal/issues/649#issuecomment-1561690674

My implementation is to ensure that there is sufficient reservoir of power in the battery for taking…[Read more]

Well, I’m back at my desk, with a Mayfly and powered it up, and I’m posting to

Host: monitormywatershed.org

and getting

— Response Code — 301 waited  326 mS Timeout 8000

If I change it to

Host: data.envirodiy.org

— Response Code — 201 waited  577 mS Timeout 8000

From   https://github.com/ODM2/ODM2DataSharingPortal/issues/542

aufdenkampe …

[Read more]

@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]

I  wonder if there has been further insight.?

It seems a real challenge to phrase how to have real world reliability. It seems to be such a hard concept to discuss and define how to get there. Its a standard Computer Engineering problem, and it typically requires a commitment to make it happen, and a reference model to test the implementation.

Thanks for looking into it.

I’m in the UK for my Uncle who had a stroke, and I took off very quickly from California,  and not likely to get back before the end of May after his funeral. I haven’t brought any tools to see what the response are from the server.

It seems very unlikely that 5 systems would all stop transmitting by themselves. My…[Read more]

Hope it works  – be fascinating to get an overview of the project when you have time 🙂

@ckillen sorry to hear about the problems  – I make the assumption that a sub-module can always lockup, and may need a hard reset/power cycle to bring it back. Internal modem software can only be as good as its tested, sub-modules  comms software is complicated and its very difficult to test for all cases.

The Maylfy1.1 now supports a power off c…[Read more]

Great @ldecicco  – one are to note with “pio pkg install” is how it becomes part of your build process.  I like to have a development build environment tree.  Then a final “release” environment – and attempt to take a full snapshot of all libs used. I encapsulate the difference in text instructions and operation of the platformio.ini.

@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]

@ldecicco congrats on trying the platformio – it has a lot of professional capability, but like anything – getting in a fancy plane(!) there are lots of bells and whistles that can go off.

For “new” libs there are at least two ways to work with them, a)  put the full path to them under libdeps

I find a…[Read more]

The other side of failure is looking at how to  design for system stability.

Some components may appear to fail, like modems. However the software of course needs to be robust enough to handle network conditions.

A way of thinking about it is the “7 Layer OSI stack”  and transmission reliability is attributed to Network Layer, or  layer 3  htt…[Read more]

@sofija  if you start a topic, perhaps describing what sensors you think you want, and some of the sensing goals, then it would be easier to provide some insights. My first board I used was from a Dutch company, the hardware availability isn’t a good place to discuss this. It could be in https://www.envirodiy.org/forum/infrastructure-and-equipment/

Hello Mary, gosh you may have to provide more detail of what you are thinking you are doing. The tipping bucket is typically a pulse count – it needs to translate the mechanical tipping bucket to an electronic pulse.  So you may want to reference this in more detail.

There is this , never tried it . .. https://github.com/EnviroDIY/TippingBucketRainCounter