neilh

Thanks for the headsup.  I was checking yesterday so wondering what the status was. Many thanks

Looking at this posts as a discussion on general SDI-12, I have the Mayfly interface working for a Insitu LT500 Water Level monitor in a prototype capacity.

The LT500 requires an 8-36V Excitation, so I put in a series booster,  +12V   https://www.pololu.com/product/2117, and connected the other end to Grove 4pin JST-PH cable (std one cut in h…[Read more]

I could be needing about 6 Mayfly’s + 1 LTE Adapter Board – where is the best way of placing an order, many thanks Neil

I had some of the same ~ then for new sensors on a specific site, I found  by changing the name and removing the ‘-‘ in the name, the new sensor + started working for me.

Last week I added a new site, had a few problems, changed revisited the site/name slightly, and the I was able to add the…[Read more]

Here is some new data. I had the FTDI cable connected, and seems like it was influencing things somehow. I cut the RX (always high ~ 3.5V) and that changed the way Q1 is turned on. Still not sure why.  I removed the FTDI altogether and repeated the readings.

The Mayfly will now continue oprtsting to V_batt reaches 3.00V, resets when I drop to…[Read more]

So just checking, the Vbat voltage range. I’ve an application that doesn’t have a solar panel.     I’m trying to figure out     1) can a LiSOCl2  3.6V 19Ahr be used  2) 3*D Mn 18Ahr    3) generically characterize  the LiPo measured Voltage,…[Read more]

I’m added a new capability for the Mayfly to program its internal EEPROM with geographical specific pieces of information.
When a site is visited, this will allow the retrieved uSD card to be replaced with a blank uSD card.
https://github.com/neilh10/ModularSensors/wiki/Feature-notes

For multiples sites that don’t have modems, and the readings…[Read more]

@movingplaid   for the basic EC sensor above, and 10bit ADC and running at 2minutes sampling – which is way too fast for a simple DC switched EC sensor got a pretty good result. Graph below.

Next stage is to run it overnight, and for simplicity will graph it on MMW

Hi Robert,  be happy to, and I’ve just finishing up a ModularSensors class.

just thought I had posted here, and it hasn’t shown up, so trying again – here are the core…[Read more]

Hi Jim. Thanks for the description.

What the ‘ini’ reader does is read a file on the  Mayfly microSD card called ms_cfg.ini – in that file is all the configuration information that is specific to a particular node “station” as when the MMW sensor UUIDs are created.

What this does is allow your .ino file to be compiled once to a .HEX, with no…[Read more]

Hi Anthony ~ thanks for the headsup. For today my desk proto system running at 15minutes intervals/WiFi I haven’t seen any timeouts, all 201’s in the last 5hrs

Matt, sorry to hear the reconstruction issues. Welcome to software development.  I’ve got lots of silver hairs from it.

The process of proving or verifying software functionality,…[Read more]

Hi Matt
You’re doing some good characterization work. Thankyou for sharing it.
A basic issue to keep in mind is that all communications can be unreliable as there is complex telecoms infrastructure.

An arbitrary wireless placement’s reliability is difficult to quantify ~ distance to cell head, direction of wind, fog/rain etc. A wireless network…[Read more]

I’m seeing similar. Out of 15posts at two miuntes apart. the first 6 where 201, and then the rest mixed 504 and 201.
The site is https://monitormywatershed.org/sites/TU-RC-Test03a/
The post structure looks good:

Sending data to [ 0 ] data.envirodiy.org
POST /api/data-stream/ HTTP/1.1
Host: data.envirodiy.org
TOKEN:…[Read more]

Hi Evan, I was wondering how your experiments are going.
I was thinking of constructing a ModularSensors class along what you had been talking about.
So this follows the
https://hackaday.io/project/7008-fly-wars-a-hackers-solution-to-world-hunger/log/24646-three-dollar-ec-ppm-meter-arduino
with a series voltage switched R of about 500, and an IEC…[Read more]

Yes that should work. On processor reset, A5 will need to be setoutput to out and low.
Then on setting A6 high AND there is enough power in the LiIon battery the Xbee Radio should come on.
It should be noted its a good idea to monitor the LiIon battery, as it should be sized for the power usage (I like 2Ahr or 4Ahr battery).
When the measured…[Read more]

I’m seeing it as well. It starts of as 201, and then after 10~2 POST starts printing 504. It has been happening from late last week – but is being recorded on MMW. I wasn’t monitoring anything early last week,

Its a good discussion, and I’m interested in the context of the study of intermittent streams.

There are a lot of examples of detecting “water leaks”, that is the physical situation of going from no water, to “tap water” – a relatively low TDS water.
For an intermittent stream, I imagine its going from a physical water present (with potentially…[Read more]